Amplifier device and chip

Abstract

The embodiment of the invention provides an amplifier device which comprises a voltage converter and a feedback controller, and the voltage converter comprises a switching network, a pumping capacitor module connected to a power supply end and a grounding end through the switching network, an H-bridge driving circuit and an output capacitor. The H-bridge driving circuit is provided with a voltage input end connected to the pumping capacitor module, and a first bridge arm and a second bridge arm which are connected between the voltage input end and a grounding end, and each of the first bridge arm and the second bridge arm comprises an upper power switch tube and a lower power switch tube; the output capacitor is connected between the connection point of the upper power switch tube and the lower power switch tube of the first bridge arm and the connection point of the upper power switch tube and the lower power switch tube of the second bridge arm and is used for providing output voltage; and the feedback controller is used for controlling on-off states of power switch tubes in the switch network and the H-bridge driving circuit according to the output voltage and a preset reference voltage, so that the output voltage is equal to a preset multiple of the preset reference voltage.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of integrated circuit technology, and in particular to an amplifier device and a chip. Background Art

[0002] The charge pump circuit is a DC-DC conversion circuit that uses a capacitor as an energy storage element. The H-bridge drive circuit is a switch circuit mainly composed of four switch devices. Usually, pulse width modulation (PWM) can be used to control the on-off state of the four switch devices in the H-bridge drive circuit, and an output voltage in the form of a PWM chopping signal is output at its output end.

[0003] It is an existing mature technology to use a charge pump circuit in conjunction with an H-bridge drive circuit with a feedback control module to generate a desired voltage. In the related art, the switch device in the charge pump circuit is usually controlled to operate according to a certain clock frequency to boost the power supply voltage input to the charge pump circuit by a preset multiple and then provide it to the H-bridge drive circuit. The feedback control module controls the on-off state of the switch device in the H-bridge drive circuit by using PWM based on the comparison result between the output voltage of the H-bridge drive circuit and the reference voltage to achieve a desired voltage equal to the reference voltage.

[0004] However, in the above-mentioned related art, the switch devices in the charge pump circuit are independently controlled to generate a boost voltage to power the H-bridge drive circuit, and the switch devices in the H-bridge drive circuit are independently controlled to ensure that the output voltage is equal to the reference voltage. The switch devices in the two circuits act independently, resulting in large switching losses in the entire circuit. In addition, in the above-mentioned circuit, since the H-bridge drive circuit outputs an output voltage in the form of a PWM chopping signal, it cannot be applied to a load that requires a continuous analog signal. Summary of the invention

[0005] In view of this, an embodiment of the present application provides a verification code generation solution to at least partially solve the above-mentioned problem.

[0006] According to a first aspect of an embodiment of the present application, an amplifier device is provided, comprising: a voltage converter and a feedback controller, wherein the voltage converter comprises a switch network, a pump capacitor module, an H-bridge drive circuit and an output capacitor;

[0007] The switch network includes a plurality of power switch tubes;

[0008] The pump capacitor module is connected to a power supply terminal and a ground terminal via the switch network;

[0009] The H-bridge driving circuit has a voltage input terminal connected to the pump capacitor module, and a first bridge arm and a second bridge arm connected between the voltage input terminal and the ground terminal, the first bridge arm and the second bridge arm both include an upper power switch tube and a lower power switch tube, the connection point of the upper power switch tube and the lower power switch tube of the first bridge arm is the first output terminal of the H-bridge driving circuit, and the connection point of the upper power switch tube and the lower power switch tube of the second bridge arm is the second output terminal of the H-bridge driving circuit;

[0010] The output capacitor is connected between the first output terminal and the second output terminal of the H-bridge driving circuit and is used to provide an output voltage;

[0011] The feedback controller is used to control the on / off state of the power switch tubes in the switch network and the H-bridge drive circuit according to the output voltage and the preset reference voltage, so that the output voltage is equal to the preset reference voltage.

[0012] [AW20240052ICN1][HS2411027CCN]Set the multiple.

[0013] According to a second aspect of an embodiment of the present application, a chip is provided, comprising the amplifier device according to the first aspect or the second aspect.

[0014] According to the amplifier device provided in the embodiment of the present application, the switch network includes multiple power switch tubes, and the pump capacitor module is connected to the power supply end and the ground end via the switch network. By controlling the on-off state of the multiple power switch tubes in the switch network, the pump capacitor module can be charged and discharged to control the charge on the pump capacitor module; the voltage input end of the H-bridge drive circuit is connected to the pump capacitor module, and the H-bridge drive circuit includes a first bridge arm and a second bridge arm connected between the voltage input end and the ground end. The first bridge arm and the second bridge arm both include an upper power switch tube and a lower power switch tube. The output capacitor is connected between the connection point of the upper power switch tube and the lower power switch tube of the first bridge arm and the connection point of the upper power switch tube and the lower power switch tube of the second bridge arm, which is equivalent to the output capacitor being connected to the pump capacitor module through the upper power switch tube of the H-bridge drive circuit. Therefore, by controlling the on-off state of the upper power switch tube of the H-bridge drive circuit, the charge conduction between the output capacitor and the pump capacitor module can be controlled, and then the voltage across the output capacitor can be controlled to achieve control of the output voltage. Based on the above circuit architecture, the feedback controller can uniformly and coordinately control the on / off state of the power switch tubes in the switch network and the H-bridge drive circuit according to the output voltage and the preset reference voltage, so that the output voltage is equal to the preset multiple of the preset reference voltage, reducing the number of switching of the power switch tube, thereby reducing the switching loss of the entire circuit and improving the system efficiency. In addition, in the above circuit architecture, the voltage on the output capacitor is controlled to rise or fall by conducting charges between the pump capacitor and the output capacitor, which allows the voltage across the output capacitor to change continuously, that is, the voltage across the output capacitor is a continuous analog signal with less electromagnetic interference, and is therefore suitable for loads that require continuous simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of a circuit architecture in which a charge pump circuit and an H-bridge drive circuit are used in conjunction with each other as provided in the related art;

[0017] Figure 2 A schematic diagram of the structure of an amplifier device provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of an amplifier device provided in an embodiment of the present application;

[0019] Figure 4A schematic diagram of the structure of another amplifier device provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of the structure of another amplifier device provided in an embodiment of the present application;

[0021] Figure 6 A schematic diagram of the structure of a pump capacitor module provided in an embodiment of the present application;

[0022] Figure 7a and Figure 7b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the first charging mode is shown;

[0023] Figure 8a and Figure 8b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the second charging mode is shown;

[0024] Figure 9a and Figure 9b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the first discharge mode is shown;

[0025] Fig.10a and Fig.10b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the second discharge mode is shown;

[0026] Fig.11a and Fig.11b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the third discharge mode is shown;

[0027] Fig.12a and Figure 12b for Figure 4 A schematic diagram of the current flow path of the amplifier device in the fourth discharge mode is shown;

[0028] Fig.13 A schematic diagram of the structure of another amplifier device provided in an embodiment of the present application;

[0029] Fig.14 for Fig.13 A schematic diagram of the current flow path of the amplifier device in the second discharge mode is shown;

[0030] Fig.15 A schematic diagram of the structure of another amplifier device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0032] Figure 1 A schematic diagram of a circuit architecture in which a charge pump circuit and an H-bridge drive circuit are used in conjunction with each other is provided in the related art. Figure 1 As shown, the H-bridge driving circuit 2 is provided with a feedback control module 3. The charge pump circuit 1 serves as a power supply module to supply power to the H-bridge driving circuit 2. Specifically, the switch devices S01 to S04 in the charge pump circuit 1 operate at a certain clock frequency under the control of the clock signal, and the power supply voltage VIN input to the charge pump circuit 1 is increased to a boost voltage Vout1, and provided to the H-bridge driving circuit 2. The H-bridge driving circuit 2 is a switching circuit composed of four switching devices, which is used to provide an output voltage to the load 4. The feedback control module 3 samples the output voltage of the H-bridge driving circuit 2, and controls the on-off state of the four switching devices according to the comparison result between the sampled voltage Vfb and the reference voltage Vref, so that the output voltage Vout2 is equal to the reference voltage Vref.

[0033] exist Figure 1 In the circuit architecture, the switch devices S01-S04 in the charge pump circuit 1 are controlled by the clock signal, and the switch devices SH1-SL2 in the H-bridge drive circuit 2 are controlled by the H-bridge switch signal generated by the feedback control module 3, and each operates independently. Since the operation of the switching devices will cause switching losses and electromagnetic interference, Figure 1 The frequent switching action of the circuit architecture will bring about electromagnetic interference with large switching losses. In addition, Figure 1 The output voltage of the H-bridge driving circuit is a PWM chopping signal, which makes Figure 1 The circuit architecture cannot be applied to loads that require continuous analog signals.

[0034] In order to at least partially solve the above technical problems, an embodiment of the present application provides an amplifier device, which adopts a new architecture that integrates a charge pump circuit and an H-bridge drive circuit. In the new architecture, the upper power switch tube of the H-bridge drive circuit is shared with the output switch of the charge pump circuit in the prior art, and the lower power switch tube of the H-bridge is used for commutation, and only performs a switching action when switching between the positive and negative half cycles, and maintains different switching actions for the rest of the time, thereby reducing the number of switching times of the power switch tube, reducing the switching loss and electromagnetic interference of the entire circuit system, and improving the efficiency of the system. In addition, the amplifier device provided in the embodiment of the present application provides a desired output voltage by controlling the voltage on the output capacitor to rise or fall, which makes the output voltage a continuous analog signal, which is suitable for loads that require a continuous analog system.

[0035] To facilitate understanding, the specific implementation of the embodiment of the present application is further explained below in conjunction with the accompanying drawings of the embodiment of the present application.

[0036] Figure 2 This is a schematic diagram of the structure of an amplifier device provided in an embodiment of the present application. Figure 2 As shown, the amplifier device 10 includes: a feedback controller 100 and a voltage converter 200, wherein the voltage converter 200 includes a switch network 210, a pump capacitor module 220, an H-bridge driving circuit 230 and an output capacitor Cout;

[0037] The switch network 210 includes a plurality of power switch tubes;

[0038] The pump capacitor module 220 is connected to the power terminal VIN and the ground terminal GND via the switch network 100;

[0039] The H-bridge driving circuit 230 includes a voltage input terminal VH connected to the pump capacitor module 220 and a first bridge arm and a second bridge arm connected between the voltage input terminal VH and the ground terminal GND. The first bridge arm and the second bridge arm both include an upper power switch tube and a lower power switch tube. The connection point between the SH1 of the first bridge arm and the lower power switch tube SL1 is the first output terminal OP of the H-bridge driving circuit 230. The connection point between the upper power switch tube SH2SH2 of the second bridge arm and the lower power switch tube SL2 is the second output terminal ON of the H-bridge driving circuit 230.

[0040] An output capacitor Cout is connected between the first output terminal OP and the second output terminal ON of the H-bridge driving circuit, and is used to provide an output voltage VOUT;

[0041] The feedback controller 100 is used to control the on / off state of the power switches in the switch network 210 and the H-bridge drive circuit 230 according to the output voltage VOUT and the preset reference voltage Vref, so that the output voltage VOUT is equal to a preset multiple of the reference voltage Vref.

[0042] Specifically, Figure 2 As shown, the power supply terminal VIN provides a power supply voltage. The pump capacitor module 220 has a first terminal CN and a second terminal CP. The first terminal CN and the second terminal CP of the pump capacitor module 220 are connected to the power supply terminal VIN and / or the ground terminal GND via the switch network 210. The switch network 210 includes a plurality of power switch tubes (not shown). Specifically, the first terminal CN and the second terminal CP of the pump capacitor module 220 are connected to the power supply terminal VIN and / or the ground terminal GND via the plurality of power switch tubes. Therefore, the feedback controller 100 controls the on-off state of the plurality of power switch tubes in the switch network 210 through the output voltage VOUT and the preset reference voltage Vref, and can realize the electrical connection between the first terminal CN and the second terminal CP of the pump capacitor module 220 and the power supply terminal VIN and / or the ground terminal GND, thereby realizing the charging and discharging of the pump capacitor module 220.

[0043] The H-bridge driving circuit 230 includes a voltage input terminal VH, a first output terminal OP, and a second output terminal ON. The voltage input terminal VH of the H-bridge driving circuit 230 is connected to the second terminal CP of the pump capacitor module 220. The connection point of the upper power switch tube SH1 and the lower power switch tube SL1 of the first bridge arm of the H-bridge driving circuit 230 is the first output terminal VOP of the H-bridge driving circuit, and the connection point of the upper power switch tube SH2 and the lower power switch tube SL2 of the second bridge arm is the second output terminal VON of the H-bridge driving circuit. The output capacitor Cout is connected between the first output terminal VOP and the second output terminal VON of the H-bridge driving circuit 230, which is equivalent to the output capacitor Cout being connected to the second terminal CP of the pump capacitor module 220 through the upper power switch tubes of the first bridge arm and the second bridge arm. When the upper power switch tube in the first bridge arm or the upper power switch tube in the second bridge arm is turned on, the charge conduction between the output capacitor Cout and the pump capacitor module 220 can be realized, thereby controlling the voltage across the output capacitor Cout to continuously rise or fall. The voltage across the output capacitor Cout is the output voltage provided by the H-bridge driving circuit 230 to the load L. The output voltage is the differential voltage between the voltage VOP at the first output terminal OP and the voltage VON at the second output terminal ON of the H-bridge driving circuit 230 .

[0044] It should be understood that the amplifier device provided in the embodiment of the present application can be applicable to capacitive loads, resistive loads or other loads. When the load L is a resistive load or other non-capacitive load, an output capacitor Cout needs to be set. The output capacitor Cout is connected in parallel with the load between the first output terminal VOP and the second output terminal VON of the H-bridge drive circuit to provide an output voltage as a continuous analog signal to the load L by controlling the voltage across the output capacitor Cout to continuously rise or fall. When the load is a capacitive load, the output capacitor Cout may not be set separately, and the capacitive load may be used as the output capacitor Cout, that is, the output capacitor Cout is provided by the capacitive load. When the capacitive load is used as the output capacitor Cout, the voltage across the capacitive load may be directly controlled to continuously rise or fall by charge conduction between the capacitive load and the pumping capacitor module.

[0045] The feedback controller 100 can generate a switch control signal Vctr according to the output voltage VOUT (specifically, the sampling signal VOUT_FB of the output voltage VOUT) provided by the output capacitor Cout and the preset reference voltage Vref, which is used to control the on-off state of the power switch tube in the switch network 210 and the H-bridge drive circuit 230. In the embodiment of the present application, the feedback controller 100 can be used in the same manner as Figure 1 The feedback control module 3 shown in FIG. 1 may include a voltage acquisition unit and a switch control unit. The voltage acquisition unit is used to sample the output voltage VOUT to generate a sampled voltage VOUT_FB. The switch control unit generates a switch control signal Vctr according to the sampled voltage VOUT_FB and a preset reference voltage Vref. It should be understood that the feedback controller 100 may also be configured to have other structures, which is not limited in this embodiment.

[0046] In the embodiment of the present application, the power switch tube in the H-bridge driving circuit 230 can be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), referred to as MOS tube.

[0047] In one embodiment of the present application, the first output terminal OP and the second output terminal ON of the H-bridge driving circuit are used to connect to a non-capacitive load, and the capacitance of the output capacitor Cout is greater than the total capacitance of the pump capacitor module 220 .

[0048] In another embodiment of the present application, the first output terminal OP and the second output terminal ON of the H-bridge driving circuit are used to connect to a capacitive load, and the total capacitance of the output capacitor Cout and the capacitive load is greater than the total capacitance of the pump capacitor module 220.

[0049] In another embodiment of the present application, the first output terminal OP and the second output terminal ON of the H-bridge driving circuit are used to connect to a capacitive load, the capacitive load is used as an output capacitor Cout, and the capacitance value of the capacitive load is greater than the capacitance value of the pumping capacitor module.

[0050] In the embodiment of the present application, the on-off state of the power switch tube in the switch network and the H-bridge drive circuit is uniformly controlled by the feedback controller 100 according to the sampling signal of the output voltage and the preset reference voltage, which reduces the number of switching times of the power switch tube, thereby reducing the switching loss and electromagnetic interference of the entire circuit system and improving the system efficiency. In addition, in the above circuit architecture, the output voltage is controlled by controlling the voltage across the output capacitor to rise or fall, which makes the output voltage a continuous analog signal, which is suitable for loads that require a continuous analog system.

[0051] based on Figure 2 In the amplifier device shown, in one embodiment of the present application, the feedback controller 100 is used to control the on-off state of the lower power switch tubes SL1 and SL2 in the H-bridge driving circuit 230 according to the polarity of the preset reference voltage, so that the polarity of the output voltage is the same as the polarity of the reference voltage. When the preset reference voltage is a positive voltage, the lower power switch tube SL1 of the first bridge arm is controlled to be turned off, and the lower power switch tube SL2 of the second bridge arm is turned on; when the preset reference voltage is a negative voltage, the lower power switch tube SL1 of the first bridge arm is controlled to be turned on, and the lower power switch tube SL2 of the second bridge arm is turned off.

[0052] In the embodiment of the present application, the lower power switch tubes SL1 and SL2 of the H-bridge driving circuit 230 are used for commutation, and only perform a switching action when the preset reference voltage Vref switches from a positive voltage to a negative voltage or from a negative voltage to a positive voltage. During the period when the preset reference voltage Vref is a positive voltage or a negative voltage, regardless of the comparison result between the preset reference voltage and the output voltage, the lower power switch tube of the H-bridge driving circuit 230 remains unchanged, thereby reducing the number of switching actions during the operation of the entire circuit system, thereby reducing the switching loss of the entire circuit system.

[0053] For example, in one implementation of the present application, the preset reference voltage Vref is a voltage signal that alternates between positive and negative. The lower power switch tube of the H-bridge drive circuit 230 performs a switch switching action only when the positive and negative half-cycles of the preset reference voltage are switched, ensuring that the polarity of the output voltage is the same as the polarity of the preset reference voltage Vref. During the period when the preset reference voltage Vref is in the positive cycle or the negative half-cycle, regardless of the comparison result between the output voltage and the preset reference voltage Vref, the lower power switch tube of the H-bridge drive circuit 230 will not act. Compared with the H-bridge drive circuit in the figure, this can significantly reduce the number of times the lower power switch tube acts, thereby reducing the switching loss of the system.

[0054] based on Figure 2 The amplifier device shown, in one embodiment of the present application, the feedback controller 100 is used to control the on-off state of the power switch tube in the switch network 210 and the upper power switch tube in the H-bridge drive circuit 230 according to the comparison result of the sampling voltage VOUT_FB of the output voltage VOUT and the preset reference voltage Vref, so as to control the voltage converter 200 to operate in a charging mode, a discharging mode or a maintenance mode, so that the output voltage VOUT is equal to a preset multiple of the preset reference voltage Vref.

[0055] In an embodiment of the present application, when the polarity of the preset reference voltage Vref does not change, the output voltage can be regulated by controlling the on / off state of the power switch tube in the switch network 210 and the upper power switch tube in the H-bridge drive circuit 230, thereby reducing the number of switching actions and thereby reducing the switching loss of the entire circuit system.

[0056] In the embodiment of the present application, the feedback controller 100 can use a variety of feedback control methods to control the voltage converter 200 in a charging mode, a discharging mode or a maintenance operation, so that the output voltage VOUT is equal to a preset multiple of the preset reference voltage Vref. For ease of understanding, four possible implementation methods are listed below, taking the preset reference voltage Vref as a positive voltage (or in a positive half cycle) as an example.

[0057] In a first possible implementation, the feedback control module 100 is used to: when the sampling voltage Vout_FB is less than the preset reference voltage Vref, control the voltage converter 200 to operate in the charging mode; when the sampling voltage Vout_FB is greater than the preset reference voltage Vref, control the voltage converter 200 to operate in the discharging mode. That is, when the output voltage VOUT needs to be increased, the voltage converter 200 is controlled to operate in the charging mode to increase the voltage across the output capacitor Cout by charging the output capacitor Cout; when the output voltage VOUT needs to be reduced, the voltage converter 200 is controlled to operate in the charging mode to reduce the voltage across the output capacitor Cout by discharging the output capacitor Cout.

[0058] In a second possible implementation, the feedback control module is used to: when the sampled voltage Vout_FB of the output voltage VOUT is less than the preset reference voltage Vref, control the voltage converter 200 to operate in the charging mode; when the sampled voltage Vout_FB of the output voltage VOUT is greater than the preset reference voltage Vref, control the voltage converter 200 to operate in the maintenance mode. That is, when the output voltage VOUT needs to be increased, the voltage converter 200 is controlled to operate in the charging mode to increase the voltage across the output capacitor Cout by charging the output capacitor Cout; when the output voltage VOUT needs to be reduced, the voltage converter 200 is controlled to operate in the maintenance mode to reduce the voltage across the output capacitor Cout by discharging the output capacitor Cout itself slowly or discharging via a load connected in parallel to the output capacitor Cout.

[0059] In a third possible implementation, the feedback control module is used to: when the sampling voltage Vout_FB of the output voltage VOUT is less than the preset reference voltage Vref, control the voltage converter 200 to operate in the charging mode; when the sampling voltage Vout_FB of the output voltage VOUT is greater than the preset reference voltage Vref, control the voltage converter 200 to operate in the maintenance mode; when the sampling voltage Vout_FB obtained after the voltage converter 200 has worked in the maintenance mode for a preset period of time is still greater than the preset reference voltage Vref, control the voltage converter 200 to operate in the maintenance mode.

[0060] In a fourth possible implementation, the feedback control module is used to: when the sampling voltage Vout_FB is less than the preset reference voltage Vref, and the difference between the sampling voltage Vout_FB and the preset reference voltage Vref exceeds the preset allowable range, control the voltage converter 200 to operate in the charging mode; when the sampling voltage Vout_FB is greater than the preset reference voltage Vref, and the difference between the sampling voltage Vout_FB and the preset reference voltage Vref exceeds the preset allowable range, control the voltage converter 200 to operate in the maintenance mode; when the difference between the sampling voltage Vout_FB and the preset reference voltage Vref is within the preset allowable range, control the voltage converter 200 to operate in the maintenance mode.

[0061] It should be understood that when the preset reference voltage Vref is a negative voltage (or is in a negative half cycle), the voltage converter 200 is controlled to maintain mode operation based on the relationship between the absolute value of the preset reference voltage Vref and the absolute value of the sampling voltage VOUT_FB. The control principle is similar to that when the preset reference voltage Vref is in a positive half cycle, and will not be repeated here.

[0062] In addition, it should be understood that the above four possible implementations are merely exemplary feedback control methods. In practical applications, different feedback control methods may be set according to actual needs, and this embodiment does not limit them.

[0063] In the embodiment of the present application, in the maintenance mode, the power switch tube in the switch network 210 and the upper power switch tube in the H-bridge drive circuit 230 maintain the on-off state of the previous moment. This allows the output capacitor Cout to be discharged slowly by itself or through the load connected in parallel with the output capacitor Cout, thereby minimizing the number of switching actions to reduce the power consumption of the entire circuit system and improve the energy efficiency of the system.

[0064] Refer to the following Figure 2 The amplifier device shown illustrates the charging mode and the discharging mode of the amplifier device provided in the embodiment of the present application respectively.

[0065] based on Figure 2 In the amplifier device shown in one embodiment of the present application, the charging mode includes a first charging stage and a second charging stage that are performed alternately; in the first charging stage, charges are conducted from the power supply terminal VIN to the pumping capacitor module 220, and in the second charging stage, charges are conducted from the pumping capacitor module 220 to the output capacitor Cout.

[0066] Specifically, when the voltage converter 200 is controlled to operate in a charging mode, the voltage converter 200 alternately executes a first charging stage and a second charging stage. In the first charging stage, the charge is controlled to be conducted from the power supply terminal VIN to the pump capacitor module 220. In the second charging stage, the charge is controlled to be conducted from the pump capacitor module 220 to the output capacitor Cout. The first charging stage and the second charging stage are alternately executed to continuously charge the output capacitor, gradually increasing the voltage across the output capacitor, so that the output capacitor Cout can provide a continuously changing output voltage, thereby making the amplifier device 10 provided in the present application suitable for loads that require continuous analog signals, for example, it can be used to realize the playback function of continuous analog signals.

[0067] It should be understood that in this embodiment, the first charging stage and the second charging stage are not in order, the first charging stage can be performed first and then the second charging stage, or the second charging stage can be performed first and then the first charging stage.

[0068] [AW20240052ICN1][HS2411027CCN] Please do not limit this in the embodiment.

[0069] For example, in a specific embodiment, the feedback controller 100 is used to: in a first charging stage, control the switch network 210 to electrically connect the first end CN and the second end CP of the pump capacitor module 220 to the ground end GND and the power supply end VIN, respectively, so as to conduct charge from the power supply end VIN to the pump capacitor module 220; in a second charging stage, control the switch network 210 to connect the first end CN of the pump capacitor module 220 to the ground end or the power supply end, and control the upper power switch tube of the first target bridge arm in the H-bridge drive circuit to electrically connect the second end CP of the pump capacitor module 220 to the output capacitor, so as to conduct charge from the pump capacitor module 220 to the output capacitor Cout; wherein the first target bridge arm is the bridge arm in which the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

[0070] Specifically, as mentioned above, the on-off state of the lower power switch tubes SL1 and SL2 depends on the polarity of the preset reference voltage Vref. When the preset reference voltage Vref is a positive voltage, the lower power switch tube SL2 of the second bridge arm is turned on, and the lower power switch tube SL1 of the first bridge arm is turned off. At this time, the first target bridge arm is the first bridge arm. When the preset reference voltage Vref is a negative voltage (for example, the preset reference voltage Vref is in a negative half cycle), the lower power switch tube SL1 of the first bridge arm is turned on, and the lower power switch tube SL2 of the second bridge arm is turned off. At this time, the first target bridge arm is the second bridge arm.

[0071] When the lower power switch tube SL2 of the second bridge arm is turned on, the second end ON of the output capacitor Cout is connected to the ground terminal. When the upper power switch tube SH1 of the first bridge arm is controlled to be turned on, the pump capacitor module 220 is electrically connected to the first end OP of the output capacitor Cout to charge the output capacitor Cout, and the voltage at the first end OP of the output capacitor Cout increases, so that the output voltage provided by the output capacitor Cout increases in the positive direction. When the lower power switch tube SL1 of the first bridge arm is turned on, the first end OP of the output capacitor Cout is connected to the ground terminal. When the upper power switch tube SH2 of the second bridge arm is controlled to be turned on, the pump capacitor module 220 is electrically connected to the second end ON of the output capacitor Cout to charge the output capacitor Cout, and the voltage at the second end ON of the output capacitor Cout increases, so that the output voltage provided by the output capacitor Cout increases in the negative direction. In an embodiment of the present application, by alternately switching the on / off states of the power switch tube in the control switch network and the upper power switch tube in the first target bridge arm in the first charging stage and the second charging stage, continuous regulation of the output voltage can be achieved, reducing the number of switch switching times, reducing the switching loss of the system, and at the same time providing a continuous output voltage, so that the amplifier device 10 provided in the present application is suitable for loads that require continuous analog signals.

[0072] Similarly, based on Figure 2 In the amplifier device 10 shown in one embodiment of the present application, the discharge mode includes a first discharge stage and a second discharge stage that are performed alternately; in the first discharge stage, the pump capacitor module 220 releases charge, and in the second discharge stage, the output capacitor Cout releases charge to the pump capacitor module 220.

[0073] Specifically, when the voltage converter 200 is controlled to operate in the discharge mode, the voltage converter 200 alternately performs the first discharge stage and the second discharge stage. In the first discharge stage, the pump capacitor module 220 is controlled to release the charge. In the second discharge stage, the output capacitor Cout is controlled to release the charge to the pump capacitor module 220. The first discharge stage and the second discharge stage are alternately performed to gradually reduce the voltage across the output capacitor Cout, so that the output capacitor Cout can provide a continuously changing output voltage. Therefore, the amplifier device 10 provided in the present application is suitable for loads that require continuous analog signals, for example, it can be used to realize the playback function of continuous analog signals.

[0074] It should be understood that in this embodiment, the first discharge stage and the second discharge stage are not in order, the first discharge stage can be performed first and then the second discharge stage, or the second discharge stage can be performed first and then the first discharge stage.

[0075] [AW20240052ICN1][HS2411027CCN] Please do not limit this in the embodiment.

[0076] In a first specific embodiment, the feedback controller 100 is used to: in a first discharge stage, control the switch network 210 to simultaneously connect the first end CN and the second end CP of the pump capacitor module 220 to the power supply end VIN, so that the pump capacitor module 220 releases charge; in a second discharge stage, control the upper power switch tube of the first target bridge arm to connect the second end of the pump capacitor module 210 to the output capacitor Cout, so that the output capacitor Cout releases charge to the pump capacitor module 220; wherein the first target bridge arm is the bridge arm where the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

[0077] As mentioned above, the on-off state of the lower power switch tubes SL1 and SL2 depends on the polarity of the preset reference voltage Vref. For example, when the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is turned off, and the lower power switch tube SL2 of the second bridge arm is turned on. At this time, the first target bridge arm is the first bridge arm. For another example, when the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is turned on, and the lower power switch tube SL2 of the second bridge arm is turned off. At this time, the first target bridge arm is the second bridge arm.

[0078] In this embodiment, in the first discharge stage, the pump capacitor module 220 can be discharged by controlling the switch network 210; in the second discharge stage, when the lower power tube SL2 of the second bridge arm is turned on, the second end of the output capacitor 220 is connected to the ground. When the upper power switch tube SH1 of the first bridge arm is turned on, the first end of the output capacitor 220 is connected to the pump capacitor module 220 to discharge to the pump capacitor module 220, so that the voltage at the first end OP of the output capacitor Cout is reduced, thereby reducing the output voltage provided by the output capacitor Cout in the positive direction. When the lower power tube SL1 of the first bridge arm is turned on, the first end of the output capacitor 220 is connected to the ground. When the upper power switch tube SH2 of the second bridge arm is turned on, the second end of the output capacitor 220 is connected to the pump capacitor module 220 to discharge to the pump capacitor module 220, so that the voltage at the second end ON of the output capacitor Cout is reduced, thereby reducing the output voltage provided by the output capacitor Cout in the negative direction.

[0079] In an embodiment of the present application, continuous regulation of the output voltage can be achieved by alternately switching the on / off states of the power switch tube in the control switch network and the upper power switch tube in the first target bridge arm in the first discharge stage and the second discharge stage, thereby reducing the number of switch switching times and reducing the switching loss of the system. At the same time, a continuous output voltage can be provided, so that the amplifier device 10 provided in the present application is suitable for loads that require continuous analog signals.

[0080] In a second specific embodiment, the feedback controller 100 is used to: in a first discharge stage, control the switch network 210 to connect the first end CN and the second end CP of the pump capacitor module 220 to the ground terminal VIN and the power supply terminal GND respectively, so that the pump capacitor module 220 releases charge; in a second discharge stage, control the upper power switch tube of the first target bridge arm to connect the second end of the pump capacitor module 210 to the output capacitor Cout, so that the output capacitor Cout releases charge to the pump capacitor module 220; wherein the first target bridge arm is the bridge arm where the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

[0081] In a third specific embodiment, the feedback controller 100 is used to control the switch network 210 and the upper power switch tube of the second target bridge arm to simultaneously connect the first end CN and the second end CP of the pump capacitor module 220 to the ground end GND, so that the pump capacitor module 220 releases charge, wherein the second target bridge arm is the bridge arm where the lower power switch tube is turned on in the first bridge arm and the second bridge arm; in the second discharge stage, the upper power switch tube of the first target bridge arm is controlled to connect the second end of the pump capacitor module 220 to the output capacitor Cout, so that the output capacitor Cout releases charge to the pump capacitor module 220; wherein the first target bridge arm is the bridge arm where the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

[0082] In a fourth specific embodiment, the feedback controller 100 is used to control the switch network 210 and the upper power switch tube of the second target bridge arm to connect the first end CN and the second end CP of the pump capacitor module 220 to the power supply end VIN and the ground end GND respectively, so that the pump capacitor module 220 releases charge, wherein the second target bridge arm is the bridge arm where the lower power switch tube is turned on in the first bridge arm and the second bridge arm; in the second discharge stage, the upper power switch tube of the first target bridge arm is controlled to connect the second end of the pump capacitor module 220 to the output capacitor Cout, so that the output capacitor Cout releases charge to the pump capacitor module 220; wherein the first target bridge arm is the bridge arm where the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

[0083] The working principles and effects of the second to fourth specific embodiments in the embodiments of the present application are similar to those of the first specific embodiment and will not be repeated here.

[0084] For ease of understanding, let's first refer to Figures 3 to 6 The structure of the amplifier device provided in the embodiment of the present application is described in detail, and then the charging mode and the discharging mode of the amplifier device provided in the embodiment of the present application are described in detail in combination with the amplifier device with reference to FIGS. 7 to 12 .

[0085] Exemplary structure of amplifier device

[0086] Figure 3 A schematic diagram of the structure of an amplifier device provided in an embodiment of the present application. Figure 3 The structure of the amplifier device in the embodiment shown is similar to Figure 2 The structures of the amplifier devices in the embodiments shown are basically the same, the main differences being: Figure 3 The illustrated embodiment shows a specific structure of the switch network in the amplifier device.

[0087] exist Figure 3In the embodiment, the switch network 210 includes a first power switch tube S1, a second power switch tube S2 and a third power switch S3; the first end CN of the pump capacitor module 220 is connected to the ground end GND via the first power switch tube S1, and is connected to the power supply end VIN via the third power switch tube S3, and the first end CP of the pump capacitor module 220 is connected to the power supply end VIN via the second power switch tube S2.

[0088] The voltage input terminal VH of the H-bridge driving circuit is electrically connected to the second terminal CP of the pump capacitor module 220. The structure, connection relationship and function of the H-bridge driving circuit 230, the output capacitor Cout and the feedback controller 100 are similar to those of FIG. Figure 2 The amplifier devices are the same and will not be described in detail here.

[0089] In the embodiment of the present application, the feedback controller 100 is exemplarily shown to include a voltage acquisition unit 110 and a switch control unit 120. The voltage acquisition unit 110 is used to collect the output voltage VOUT and generate a sampled voltage VOUT_FB. The switch control unit 120 is used to generate a switch control signal according to the sampled voltage VOUT_FB and a preset reference voltage Vref, which is used to control the on-off state of the power switch tube in the switch network 210 and the H-bridge drive circuit 230.

[0090] In the embodiment of the present application, Figure 2 Similar to the amplifier device shown, the feedback controller 100 is used to control the on-off state of the lower power switch tubes SL1 and SL2 of the H-bridge driving circuit 230 according to the polarity of the preset reference voltage Vref, so that the lower power switch tubes SL1 and SL2 of the H-bridge driving circuit 230 are used for commutation, and only perform a switching action when the preset reference voltage Vref switches from a positive voltage to a negative voltage or from a negative voltage to a positive voltage (that is, when the preset reference voltage switches between the positive and negative half cycles), ensuring that the polarity of the output voltage is the same as the polarity of the reference voltage, and when the preset reference voltage is a positive voltage or a negative voltage (that is, when the preset reference voltage is in the positive half cycle or the negative half cycle), the lower power switch tube of the H-bridge driving circuit 230 remains stationary, thereby reducing the number of switching actions, and further reducing the switching loss of the entire circuit system.

[0091] In the embodiment of the present application, in order to avoid suppressing interference, the amplifier device further includes an input capacitor Cin, and the input capacitor Cin is connected between the power supply terminal VIN and the ground terminal.

[0092] In one implementation of the present application, Figure 4 As shown, the pumping capacitor module 220 may be a first capacitor C_fly1. When the pumping capacitor module 220 is the first capacitor C_fly1, the output voltage range supported by the amplifier device 10 is ±2VIN.

[0093] To broaden the output voltage range supported by the amplifier device, Figure 5 A schematic diagram of the structure of another amplifier device according to an embodiment of the present application is provided. Figure 3 and Figure 4 The amplifier device shown is compared to Figure 5 The pumping capacitor module 220 in the amplifier device shown includes a first capacitor C_fly1 connected in series with a charge pump unit 221. The charge pump unit 221 includes a second capacitor C_fly2, a fifth power switch tube S5, a sixth power switch tube S6 and a seventh power switch tube S7.

[0094] The first end of the second capacitor C_fly1 is connected to the power supply terminal VIN and the ground terminal GND via the switch network 210, the second end of the first capacitor C_fly1 is connected to the first end of the second capacitor C_fly2 via the fifth power switch tube S5, and is connected to the second end of the second capacitor via the sixth power switch tube S6, and the first end of the second capacitor C_fly2 is connected to the ground terminal GND via the seventh power switch tube S7. The first end of the first capacitor C_fly1 is the first end CN of the pump capacitor module 220, and the second end of the second capacitor C_fly2 is the second end CP of the pump capacitor module 220.

[0095] exist Figure 5 In the amplifier device shown, by controlling the fifth power switch tube S5 to be turned off, and controlling the first power switch tube S3, the sixth power switch tube S6, and the seventh power switch tube S7 to be turned on, the second capacitor C_Fly2 can be connected in parallel with the first capacitor C_Fly1; by controlling the sixth power switch tube S5 to be turned on, and controlling the sixth power switch tube S6 and the seventh power switch tube to be turned off, the second capacitor C_Fly2 can be connected in series with the first capacitor C_Fly1. That is, the second capacitor C_fly2 can be connected in parallel or in series with C_Fly1 through the switch array including the fifth power switch tube S5, the sixth power switch tube S6, and the seventh power switch tube S7, so that Figure 5 The pump capacitor module shown can achieve a 3-fold amplification function for the input voltage.

[0096] It should be understood that Figure 5 is only an example of an amplifier device, in other embodiments, such as Figure 6 As shown, the pump capacitor module 220 may include a first capacitor C_fly1 and a plurality of charge pump units 221. The structure of each charge pump unit is similar to Figure 5The first capacitor C_fly1 can be connected in parallel or in series with the second capacitor C_Fly2 in each charge pump unit through the switch array of the fifth power switch tube S5, the sixth power switch tube S6 and the seventh power switch tube S7 in each charge pump unit, thereby achieving multiple amplification of the input voltage.

[0097] For ease of description, the following is based on Figure 4 The amplifier device shown in the figure describes in detail the charging mode and the discharging mode of the amplifier device provided in the embodiment of the present application. It should be understood that the amplifier device provided in the embodiment of the present application is also applicable to Figure 5 The amplifier device shown and comprising Figure 6 The amplifier device of the pump capacitor module shown. In the embodiment of the present application, the amplifier device may include two charging modes and four discharging modes. For ease of explanation, the two charging modes are respectively referred to as the first charging mode and the second charging mode. The four discharging modes are respectively referred to as the first discharging mode, the second discharging mode, the third discharging mode and the fourth discharging mode.

[0098] The first charging mode

[0099] Figure 7a and Figure 7b for Figure 4 Schematic diagram of the current flow path of the amplifier device in the first charging mode. Figure 2 The first charging mode includes a first charging stage and a second charging stage performed alternately. The output voltage can be adjusted to be equal to a preset integer multiple of the preset reference voltage Vref by controlling the voltage converter 100 in the amplifier device 10 to perform the first charging stage and the second charging stage alternately.

[0100] In the first charging mode, the feedback controller 100 is used to:

[0101] In the first charging stage, the first power switch tube S1 and the second power switch tube S2 are controlled to be turned on, and the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are controlled to be turned off;

[0102] In the second charging stage, if the preset reference voltage Vref is a positive voltage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned off; if the preset reference voltage Vref is a negative voltage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the second power switch tube S2 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned off.

[0103] In the first charging mode, the third power switch tube S3 is always turned off. The on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off. In addition, in the first charging mode, if the preset reference voltage Vref is a positive voltage, the upper power switch tube SH2 of the second bridge arm is always turned off; if the preset reference voltage Vref is a negative voltage, the upper power switch tube SH1 of the first bridge arm is always turned off.

[0104] In this embodiment, in the first charging stage, by controlling the first power switch tube S1 and the second power switch tube S2 to be turned on, the first terminal CN and the second terminal CP of the first capacitor C_Fly1 are electrically connected to the ground terminal GND and the power terminal VIN respectively, so as to form Figure 7a and Figure 7b The current flow path shown by P11 in the figure conducts charge from the power supply terminal VIN to the first capacitor C_Fly1. In the first charging stage, since the first terminal CN of the first capacitor C_Fly1 is electrically connected to the ground terminal GND and the second terminal CP of the first capacitor C_Fly1 is electrically connected to the power supply terminal VIN, the first capacitor C_Fly1 can be charged to the power supply voltage VIN, that is, the voltage difference between the first terminal CP and the second terminal CN of the first capacitor C_Fly1 is the power supply voltage VIN. In the second charging stage, if the preset reference voltage Vref is a positive voltage, by controlling the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm to turn on, the first terminal CN of the first capacitor C_Fly1 is connected to the ground terminal, and the second terminal CP of the first capacitor C_Fly1 is connected to the output capacitor Cout, so that Figure 7a The current flow path shown in P12 in FIG. 1 conducts charge from the first capacitor C_Fly1 to the output capacitor Cout via the upper power switch tube SH1 of the first bridge arm. If the preset reference voltage Vref is a negative voltage, by controlling the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm to be turned on, the first end CN of the first capacitor C_Fly1 is connected to the ground end, and the second end CP of the first capacitor C_Fly1 is connected to the output capacitor Cout, thereby forming a Figure 7bThe current flow path shown in P12' in the figure conducts charge from the first capacitor C_Fly1 to the output capacitor Cout via the upper power switch tube SH2 of the second bridge arm. In the second charging stage, since the first terminal CN of the first capacitor C_Fly1 is electrically connected to the ground terminal, the voltage at the second terminal of the first capacitor C_Fly1 is at most the power supply voltage VIN. At this time, if the preset reference voltage is a positive voltage, the first capacitor C_Fly1 charges the output capacitor Cout, and the output capacitor Cout can be charged to the power supply voltage VIN at most, that is, the voltage difference between the first terminal OP and the second terminal ON of the output capacitor Cout is the power supply voltage VIN. If the preset reference voltage is a negative voltage, the first capacitor C_Fly1 charges the output capacitor Cout, and the output capacitor Cout can be charged to the negative power supply voltage -VIN at most, that is, the voltage difference between the first terminal OP and the second terminal ON of the output capacitor Cout is the negative power supply voltage -VIN.

[0105] In this embodiment, no matter whether the preset reference voltage Vref is a positive voltage or a negative voltage, only two power switch tubes are switched alternately at the same time, and the other power switch tubes remain unchanged. Specifically, when the preset reference voltage Vref is a positive voltage, only the second power switch tube S2 and the upper power switch tube SH1 of the first bridge arm are switched alternately, and when the preset reference voltage Vref is a negative voltage, only the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm are switched alternately. There are only two power switch tubes at the same time, which reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the first charging mode, the voltage difference across the first capacitor C_fly is at most the power supply voltage, which makes it possible to charge the output capacitor Cout to a maximum of a positive power supply voltage or a negative power supply voltage.

[0106] Second charging mode

[0107] Figure 8a and Figure 8b for Figure 4 The schematic diagram of the current flow path of the amplifier device in the second charging mode is shown. Similar to the first charging mode, the second charging mode includes a first charging stage and a second charging stage that are performed alternately. The output voltage can be adjusted to be equal to a preset integer multiple of a preset reference voltage by controlling the voltage converter in the amplifier device to alternately perform the first charging stage and the second charging stage.

[0108] The first charging stage of the second charging mode is the same as the first charging stage of the first charging mode. Specifically, the feedback controller 100 is used to: in the first charging stage, control the first power switch tube S1 and the second power switch tube S2 to be turned on, and control the third power switch tube S3, the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm to be turned off; in the second charging stage, if the preset reference voltage Vref is a positive voltage, control the third power switch tube S3 and the upper power switch tube SH1 of the first bridge arm to be turned on, and control the first power switch tube S1, the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm to be turned off; if the preset reference voltage Vref is a negative voltage, control the third power switch tube S3 and the upper power switch tube SH2 of the second bridge arm to be turned on, and control the first power switch tube S1, the second power switch tube S2 and the upper power switch tube SH1 of the first bridge arm to be turned off.

[0109] In this embodiment, the on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off. In addition, if the preset reference voltage Vref is a positive voltage, the upper power switch tube SH2 of the second bridge arm is always turned off; if the preset reference voltage Vref is a negative voltage, the upper power switch tube SH1 of the first bridge arm is always turned off.

[0110] In this embodiment, in the first charging stage, by controlling the first power switch tube S1 and the second power switch tube S2 to be turned on, the first terminal CN and the second terminal CP of the first capacitor C_Fly1 are electrically connected to the ground terminal GND and the power terminal VIN respectively, so as to form Figure 8a and Figure 8b The current flow path shown by P21 in FIG. 1 conducts charge from the power supply terminal VIN to the first capacitor C_Fly1. In the first charging stage, since the first terminal CN of the first capacitor C_Fly1 is electrically connected to the ground terminal GND and the second terminal CP of the first capacitor C_Fly1 is electrically connected to the power supply terminal VIN, the first capacitor C_Fly1 can be charged to the power supply voltage VIN. In the second charging stage, the first terminal CN of the first capacitor C_Fly1 is connected to the power supply terminal by controlling the third power switch tube S3, and based on the polarity of the preset reference voltage Vref, the second terminal CP of the first capacitor C_Fly1 is connected to the first terminal OP or the second terminal ON of the output capacitor Cout, thereby forming the following respectively. Figure 8a P22 or Figure 8bThe current flow path shown in P22' in FIG. Since in the second charging stage, the first terminal CN of the first capacitor C_Fly1 is switched to be connected to the power supply terminal, the voltage at the second terminal of the first capacitor C_Fly1 is pumped up to twice the power supply voltage VIN. At this time, if the preset reference voltage Vref is a positive voltage, the output capacitor Cout is charged through the first capacitor C_Fly1, and the output capacitor Cout can be charged to twice the power supply voltage 2*VIN at most, that is, the voltage difference between the first terminal OP and the second terminal ON of the output capacitor Cout is 2*VIN. Similarly, if the preset reference voltage Vref is a negative voltage, the output capacitor Cout is charged through the first capacitor C_Fly1, and the output capacitor Cout can be charged to twice the negative power supply voltage -2*VIN at most, that is, the voltage difference between the first terminal OP and the second terminal ON of the output capacitor Cout is -2*VIN.

[0111] In this embodiment, no matter whether the preset reference voltage Vref is a positive voltage or a negative voltage, only three power switch tubes are switched alternately at the same time, and the other power switch tubes remain unchanged. Specifically, when the preset reference voltage Vref is a positive voltage, only the first power switch tube S1, the second power switch tube S2 and the upper power switch tube SH1 of the first bridge arm are switched alternately, and when the preset reference voltage Vref is a negative voltage, only the first power switch tube S1, the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm are switched alternately. There are only three power switch tubes at the same time, which significantly reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the second charging mode, the voltage difference across the first capacitor C_fly is at most twice the power supply voltage, which makes it possible to quickly charge the output capacitor Cout and charge the output capacitor Cout to a maximum of twice the power supply voltage or twice the negative power supply voltage.

[0112] The first discharge mode

[0113] Figure 9a and Figure 9b for Figure 4 Schematic diagram of the current flow path of the amplifier device in the first discharge mode. Figure 2 The discharge modes shown are similar, and the first discharge mode includes a first discharge phase and a second discharge phase performed alternately. The output voltage can be adjusted to be equal to a preset integer multiple of a preset reference voltage by controlling the voltage converter in the amplifier device to alternately perform the first discharge phase and the second discharge phase.

[0114] In the first discharge mode, the feedback controller 100 is used to:

[0115] If the preset reference voltage Vref is a positive voltage, in the first discharge stage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the upper power switch tube SH1 of the first bridge arm is controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the upper power switch tube SH2 of the second bridge arm is controlled to be turned off;

[0116] If the preset reference voltage Vref is a negative voltage, in the first discharge stage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the upper power switch tube SH2 of the second bridge arm is controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the upper power switch tube SH1 of the first bridge arm is controlled to be turned off.

[0117] In this embodiment, the second power switch tube S2 and the third power switch tube S3 in the switch network 210 are always turned off, and the on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off.

[0118] In this embodiment, when the preset reference voltage Vref is a positive voltage, in the first discharge stage, by controlling the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm to be turned on, the first end CN and the second end CP of the first capacitor C_Fly1 are simultaneously connected to the ground end, thereby forming a Figure 9a The current flow path is shown in P31 in FIG. Figure 9a As shown, the first terminal CN and the second terminal CP of the first capacitor C_Fly1 are simultaneously connected to the ground terminal, which is equivalent to short-circuiting the first capacitor C_Fly1, so that the first capacitor C_Fly1 can be discharged to 0V. In the second discharge stage, by controlling the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm to be turned on, the first end OP of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH1 of the first bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a Figure 9a The current flow path shown in P32 in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1. In this way, by alternately performing the first discharge stage and the second discharge stage, the voltage across the output capacitor Cout can be discharged to 0V at the lowest.

[0119] Similarly, when the preset reference voltage Vref is a negative voltage, in the first discharge stage, by controlling the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm to be turned on, the first terminal CN and the second terminal CP of the first capacitor C_Fly1 are simultaneously connected to the ground terminal, thereby forming a Figure 9b The current flow path shown by P31' in FIG. The first terminal CN and the second terminal CP of the first capacitor C_Fly1 are simultaneously connected to the ground terminal, which is equivalent to short-circuiting the first capacitor C_Fly1, clearing the charge on the first capacitor C_Fly1, so that the first capacitor C_Fly1 can be discharged to 0V. In the second discharge stage, by controlling the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm to be turned on, the second terminal ON of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH2 of the second bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a Figure 9b The current flow path shown in FIG. 32 ′ causes the output capacitor Cout to discharge to the first capacitor C_Fly1 . In this way, by alternately performing the first discharge stage and the second discharge stage, the voltage across the output capacitor Cout can be discharged to 0V at the lowest.

[0120] In the embodiment of the present application, no matter the preset reference voltage is a positive voltage or a negative voltage, only two power switch tubes (i.e., the upper power switch tube SH1 of the first bridge arm and the upper power switch tube SH2 of the second bridge arm) are switched alternately at the same time, and the other power switch tubes remain unchanged, which significantly reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the present embodiment, since the voltage across the first capacitor C_fly is discharged to 0V in the first discharge stage, the voltage across the output capacitor Cout can be discharged to 0V at the lowest by alternately executing the first discharge stage and the second discharge stage.

[0121] The second discharge mode

[0122] Fig.10a and Fig.10b for Figure 4 The schematic diagram of the current flow path of the amplifier device in the second discharge mode is shown. Similar to the first discharge mode, the second discharge mode includes a first discharge stage and a second discharge stage that are performed alternately. Similarly, the output voltage can be adjusted to be equal to a preset integer multiple of the preset reference voltage by controlling the voltage converter in the amplifier device to alternately perform the first discharge stage and the second discharge stage.

[0123] In the second discharge mode, the feedback controller 100 is used to:

[0124] If the preset reference voltage is a positive voltage, in the first discharge stage, the second power switch tube S2 and the third power switch tube S3 are controlled to be turned on, and the first power switch tube S1, the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the second power switch tube S2, the third power switch tube S3 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned off;

[0125] If the preset reference voltage is a negative voltage, in the first discharge stage, the second power switch tube S2 and the third power switch tube S3 are controlled to be turned on, and the first power switch tube S1, the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the second power switch tube S2, the third power switch tube S3 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned off.

[0126] In this embodiment, the on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off.

[0127] In this embodiment, in the first discharge stage, by controlling the second power switch tube S2 and the third power switch tube S3 to be turned on, the first terminal CN and the second terminal CP of the first capacitor C_Fly1 can be connected to the power supply terminal at the same time, thereby forming Fig.10a and Fig.10b The current flow path shown in P41 in FIG. The first terminal CN and the second terminal CP of the first capacitor C_Fly1 are simultaneously connected to the power supply terminal, which is equivalent to short-circuiting the first capacitor C_Fly1, clearing the charge on the first capacitor C_Fly1, so that the first capacitor C_Fly1 can be discharged to 0V. In the second discharge stage, if the preset reference voltage is a positive voltage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the first terminal OP of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH1 of the first bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a circuit as shown in FIG. Fig.10aThe current flow path shown in P42 in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1; if the preset reference voltage is a negative voltage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the second end ON of the output capacitor Cout is connected to the ground end via the upper power switch tube SH2 of the second bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a circuit as shown in FIG. Fig.10b The current flow path shown by P42' in FIG. 4 causes the output capacitor Cout to discharge to the first capacitor C_Fly1. In this way, by alternately performing the first discharge stage and the second discharge stage, the voltage across the output capacitor Cout can be discharged to 0V at the lowest.

[0128] In the embodiment of the present application, no matter the preset reference voltage is a positive voltage or a negative voltage, only four power switch tubes (i.e., the upper power switch tube SH1 of the first bridge arm and the upper power switch tube SH2 of the second bridge arm) are switched alternately at the same time, and the other power switch tubes remain unchanged, which significantly reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the present embodiment, since the voltage across the first capacitor C_fly is discharged to 0V in the first discharge stage, the voltage across the output capacitor Cout can be discharged to 0V at the lowest by alternately executing the first discharge stage and the second discharge stage.

[0129] The third discharge mode

[0130] Fig.11a and Fig.11b for Figure 4 The schematic diagram of the current flow path of the amplifier device in the third discharge mode is shown. Similar to the first discharge mode, the third discharge mode includes a first discharge stage and a second discharge stage that are performed alternately. Similarly, the output voltage can be adjusted to be equal to a preset integer multiple of the preset reference voltage by controlling the voltage converter in the amplifier device to alternately perform the first discharge stage and the second discharge stage.

[0131] In the third discharge mode, the feedback controller 100 is used to:

[0132] If the preset reference voltage Vref is a positive voltage, in the first discharge stage, the third power switch tube S3 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the third power switch tube S3 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned off;

[0133] If the preset reference voltage Vref is a negative voltage, in the first discharge stage, the third power switch tube S3 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the third power switch tube S3 and the upper power switch tube S1 of the first bridge arm are controlled to be turned off.

[0134] In this embodiment, the second power switch tube S2 in the switch network 210 is always turned off, and the on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off.

[0135] In this embodiment, when the preset reference voltage Vref is a positive voltage, in the first discharge stage, by controlling the third power switch tube S3 and the upper power switch tube SH2 of the second bridge arm to be turned on, the first end CN of the first capacitor C_Fly1 is connected to the power supply end, and the second end CP of the first capacitor C_Fly1 is connected to the ground end, thereby forming a Fig.11a The current flow path shown in P51 in FIG. 1 allows the first capacitor C_Fly1 to be discharged to the negative power supply voltage -VIN. That is, the voltage difference between the second end CP of the first capacitor C_Fly1 and the first end CN of the first capacitor C_Fly1 is -VIN. In the second discharge stage, by controlling the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm to be turned on, the first end OP of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH1 of the first bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a circuit as shown in FIG. Fig.11a The current flow path shown in P52 in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1. In this way, by alternately performing the first discharge stage and the second discharge stage, when the preset reference voltage is a positive voltage, the voltage across the output capacitor Cout is discharged to the negative power supply voltage -VIN at the lowest, that is, when the preset reference voltage is a positive voltage, the voltage difference between the first end OP of the output capacitor Cout and the second end ON of the output capacitor Cout is -VIN at the lowest.

[0136] Similarly, when the preset reference voltage Vref is a negative voltage, in the first discharge stage, by controlling the third power switch tube S3 and the upper power switch tube SH1 of the first bridge arm to be turned on, the first end CN of the first capacitor C_Fly1 is connected to the power supply end, and the second end CP of the first capacitor C_Fly1 is connected to the ground end, thereby forming a Fig.11b The current flow path shown in P51' in FIG. 1 allows the first capacitor C_Fly1 to be discharged to the negative power supply voltage -VIN. In the second discharge phase, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the second end OP of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH2 of the second bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a Fig.11b The current flow path shown in P52' in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1. In this way, by alternately performing the first discharge stage and the second discharge stage, when the preset reference voltage is a negative voltage, the voltage across the output capacitor Cout is discharged to the power supply voltage VIN at the lowest, that is, when the preset reference voltage is a positive voltage, the voltage difference between the first end OP of the output capacitor Cout and the second end ON of the output capacitor Cout is VIN at the lowest.

[0137] In the embodiment of the present application, no matter whether the preset reference voltage is a positive voltage or a negative voltage, only four power switch tubes are switched alternately at the same time, and the other power switch tubes remain unchanged, which significantly reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the present embodiment, since the voltage across the first capacitor C_fly is discharged to the negative power supply voltage in the first discharge stage, the voltage across the output capacitor Cout can be discharged to the negative power supply voltage -VIN at the lowest when the preset reference voltage is a positive voltage by alternately executing the first discharge stage and the second discharge stage, and the voltage across the output capacitor Cout can be discharged to the positive power supply voltage VIN at the lowest when the preset reference voltage is a negative voltage.

[0138] The fourth discharge mode

[0139] Fig.12a and Figure 12b for Figure 4 The schematic diagram of the current flow path of the amplifier device in the fourth discharge mode is shown. Similar to the first discharge mode, the fourth discharge mode includes a first discharge stage and a second discharge stage that are performed alternately. Similarly, the output voltage can be adjusted to be equal to a preset integer multiple of the preset reference voltage by controlling the voltage converter in the amplifier device to alternately perform the first discharge stage and the second discharge stage.

[0140] In the fourth discharge mode, the feedback controller 100 is used to:

[0141] If the preset reference voltage Vref is a positive voltage, in the first discharge stage, the first power switch tube S1 and the second power switch tube S2 are controlled to be turned on, and the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned on, and the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned off;

[0142] If the preset reference voltage is a negative voltage, in the first discharge stage, the first power switch tube S1 and the second power switch tube S2 are controlled to be turned on, and the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm are controlled to be turned on, and the second power switch tube S1 and the upper power switch tube SH1 of the first bridge arm are controlled to be turned off.

[0143] In this embodiment, the third power switch tube S3 in the switch network 210 is always turned off, and the on-off state of the lower power switch tubes SL1 and SL2 of the first bridge arm and the second bridge arm depends on the polarity of the preset reference voltage Vref. If the preset reference voltage Vref is a positive voltage, the lower power switch tube SL1 of the first bridge arm is always turned off, and the lower power switch tube SL2 of the second bridge arm is always turned on. If the preset reference voltage Vref is a negative voltage, the lower power switch tube SL1 of the first bridge arm is always turned on, and the lower power switch tube SL2 of the second bridge arm is always turned off.

[0144] In this embodiment, in the first discharge stage, by controlling the first power switch tube S1 and the second power switch tube S2 to be turned on, the first end CN of the first capacitor C_Fly1 is connected to the ground end, and the second end CP of the first capacitor C_Fly1 is connected to the power supply end, thereby forming a Fig.12a and 12b The current flow path shown in P61 in FIG. 1 allows the first capacitor C_Fly1 to be discharged to the power supply voltage VIN. That is, the voltage difference between the second terminal CP of the first capacitor C_Fly1 and the first terminal CN of the first capacitor C_Fly1 is VIN. In the second discharge stage, if the preset reference voltage Vref is a positive voltage, by controlling the first power switch tube S1 and the upper power switch tube SH1 of the first bridge arm to be turned on, the first terminal OP of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH1 of the first bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a circuit as shown in FIG. Fig.12aThe current flow path shown in P62 in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1. If the preset reference voltage Vref is a negative voltage, by controlling the first power switch tube S1 and the upper power switch tube SH2 of the second bridge arm to be turned on, the second end ON of the output capacitor Cout is connected to the ground terminal via the upper power switch tube SH1 of the first bridge arm, the first capacitor C_Fly1 and the first power switch tube S1, forming a Fig.12a The current flow path shown in P62' in the figure makes the output capacitor Cout discharge to the first capacitor C_Fly1. In this way, by alternately performing the first discharge stage and the second discharge stage, when the preset reference voltage is a positive voltage, the voltage across the output capacitor Cout is discharged to the power supply voltage VIN at the lowest, that is, the voltage difference between the first end OP of the output capacitor Cout and the second end ON of the output capacitor Cout is the power supply voltage VIN at the lowest; if the preset reference voltage is a positive voltage, the voltage across the output capacitor Cout is discharged to the power supply voltage VIN at the lowest, that is, the voltage difference between the first end OP of the output capacitor Cout and the second end ON of the output capacitor Cout is the negative power supply voltage -VIN at the lowest.

[0145] In the embodiment of the present application, no matter the preset reference voltage is a positive voltage or a negative voltage, only two power switch tubes (the second power switch tube S2 and the upper power switch tube SH1 of the first bridge arm or the second power switch tube S2 and the upper power switch tube SH2 of the second bridge arm) are switched alternately at the same time, and the other power switch tubes remain unchanged, which significantly reduces the switching power consumption of the entire circuit system and improves the energy efficiency of the system. In addition, in the present embodiment, since the voltage across the first capacitor C_fly is discharged to the positive power supply voltage in the first discharge stage, this enables the voltage across the output capacitor Cout to be discharged to the positive power supply voltage VIN at the lowest when the preset reference voltage is a positive voltage, and the voltage across the output capacitor Cout to be discharged to the negative power supply voltage -VIN at the lowest when the preset reference voltage is a negative voltage by alternately executing the first discharge stage and the second discharge stage.

[0146] It should be understood that in the first charging mode and the second charging mode, charging the first capacitor C_fly refers to the process of increasing the absolute value of the voltage across the first capacitor C_fly; charging the output capacitor Cout refers to the process of increasing the absolute value of the voltage across the output capacitor Cout. In the first to fourth discharge modes, the process of discharging the first capacitor C_Fly1 refers to the process of reducing the absolute value of the voltage across the first capacitor C_Fly1. The process of discharging the output capacitor Cout refers to the process of reducing the absolute value of the voltage across the output capacitor Cout.

[0147] It should be understood that in the embodiment of the present application, the control amplifier device can be operated in any of the first charging mode and the second charging mode as needed, and / or any of the first discharge mode to the fourth discharge mode. The present embodiment does not limit this. In addition, in the embodiment of the present application, for each charging mode, the execution order of the two charging stages is not in particular order. The first charging stage can be executed first, and then the second charging stage, or the second charging stage can be executed first, and then the first charging stage. The present embodiment does not limit this. Similarly, for each discharge mode, the execution order of the two discharge stages is also not in particular order. The first discharge stage can be executed first, and then the second discharge stage, or the second charging stage can be executed first, and then the first discharge stage. The present embodiment does not limit this.

[0148] Exemplary extended structure of the amplifier device

[0149] like Fig.10a and Fig.10b As shown, when the amplifier device 10 provided in the above embodiment operates in the second discharge mode, in the first discharge stage, by controlling the second power switch tube S2 and the third power switch tube S3 to be turned on, both ends of the pump capacitor module 220 are simultaneously connected to the power supply end, which is equivalent to short-circuiting the pump capacitor module 220, and discharging the pump capacitor module 220 by clearing the charge on the pump capacitor module 220. This discharge method causes waste of energy stored in the pump capacitor module 220. In order to recover this part of energy, the embodiment of the present application provides another amplifier device 20. The amplifier device 20 provided in the embodiment of the present application is Figures 3 to 5 The difference between the amplifier device shown is that the voltage converter 200' in the amplifier device 20 further includes a diode D1, the anode of the diode D1 is connected to the power supply terminal, and the cathode of the diode is connected to the connection point INC of the second power switch tube S2 and the input capacitor Cin.

[0150] Specifically, Fig.13 As shown, the amplifier device 20 includes a feedback controller 100 and a voltage converter 200 ′. The voltage converter 200 ′ includes a switch network 210 , a pump capacitor module 220 , an H-bridge driving circuit 230 , an output capacitor Cout, a diode D1 , and an input capacitor Cin.

[0151] An anode of the diode D1 is connected to the power supply terminal VIN, a cathode of the diode D1 is connected to a first terminal of the input capacitor Cin, and a second terminal of the input capacitor Cin is connected to the ground terminal;

[0152] The switch network 210 includes a first power switch tube S1, a second power switch tube S2 and a third power switch tube S3. The pump capacitor module 220 includes a first terminal CN and a second terminal CP. The first terminal CN of the pump capacitor module 220 is connected to the ground terminal GND through the first power switch tube S1 and is connected to the power terminal VIN through the third power switch tube S3. The second terminal CP of the pump capacitor module 220 is connected to the first terminal of the input capacitor Cin through the second power switch tube.

[0153] The H-bridge driving circuit 230 includes a voltage input terminal VH connected to the pump capacitor module 220 and a first bridge arm and a second bridge arm connected between the voltage input terminal VH and the ground terminal GND, and the first bridge arm and the second bridge arm both include an upper power switch tube and a lower power switch tube;

[0154] An output capacitor Cout is connected between a connection point between an upper power switch tube SH1 and a lower power switch tube SL1 of the first bridge arm and a connection point between an upper power switch tube SH2 and a lower power switch tube SL2 of the second bridge arm, and is used to provide an output voltage VOUT;

[0155] The feedback controller 100 is used to control the on / off states of the power switches in the switch network 210 ′ and the H-bridge driving circuit 230 according to the output voltage VOUT and the preset reference voltage Vref, so that the output voltage VOUT is equal to a preset multiple of the reference voltage Vref.

[0156] The circuit connection structure and working principle of the feedback controller 100, the switch network 210, the H-bridge drive circuit 230 and the output capacitor Cout in the amplifier device 20 provided in the embodiment of the present application are the same as the circuit connection structure and working principle of the corresponding components in the amplifier device 10 provided in the aforementioned embodiment, and will not be repeated here.

[0157] In the embodiment of the present application, when the amplifier device 20 operates in the second discharge mode, in the first discharge stage of the second discharge mode, by controlling the second power switch tube S2 and the third power switch tube S3 to be turned on, and controlling the upper power switch tubes of the first bridge arm and the second bridge arm to be turned off, the first end of the pump capacitor module is connected to the power supply end, and the second end of the pump capacitor module is electrically connected to the input capacitor Cin, thereby forming Fig.14 The current flow path is shown in 71. Fig.14 In the first discharging phase, the pump capacitor module 220 conducts charge to the input capacitor Cin, so that the charge on the pump capacitor module 220 is recovered into the input capacitor Cin. The energy recovered in the input capacitor Cin can charge the pump capacitor module 220 when the amplifier device 20 operates in the charging mode.

[0158] In the second discharge stage of the second discharge mode, the control method and working principle of the amplifier device 20 provided in the embodiment of the present application are similar to the control method and working principle of the amplifier device 10 provided in the above embodiment, and are not described again here. Fig.14 Only the current flow path P72 of the amplifier device when the preset reference voltage is a positive voltage is exemplarily shown.

[0159] Exemplary Extended Structure of Amplifier Device II

[0160] In the embodiment of the present application, the power switch tube is usually a MOS tube. MOS tubes usually have substrate parasitic diodes. In order to prevent the charge from flowing from the corresponding parasitic diodes when the upper power switch tubes SH1 and SH2 in the H-bridge drive circuit are turned off, it is usually necessary to perform substrate selection on the upper power switch tubes in the H-bridge drive circuit to dynamically change the direction of their substrate diodes, thereby ensuring that the circuit is turned off. In the embodiment of the present application, in order to simplify the design of the upper power switch tubes SH1 and SH2 in the H-bridge drive circuit, so that there is no need to perform substrate selection on the upper power switch tubes SH1 and SH2 in the H-bridge drive circuit, the embodiment of the present application provides another amplifier device 30. The difference between the amplifier device 30 provided in the embodiment of the present application and the amplifier devices 10 and 20 provided in the aforementioned embodiments is that in the amplifier device 30 provided in the embodiment of the present application, a fourth power switch tube S4 is added between the voltage input terminal VH of the H-bridge drive circuit and the second terminal CP of the pump capacitor module 220.

[0161] Specifically, Fig.15 As shown, the voltage converter 200" in the amplifier device 30 includes a fourth power switch tube S4, a first end of the fourth power switch tube S4 is connected to the pump capacitor module 220, and a second end of the fourth power switch tube is connected to the voltage input end of the H-bridge drive circuit. Specifically, the first end of the fourth power switch tube S4 is connected to the second end of the pump capacitor module 220, and the second end of the fourth power switch tube is connected to the voltage input end of the H-bridge drive circuit. The circuit connection structure and working principle of other components in the amplifier device 30 are the same as the circuit connection structure of the corresponding components in the aforementioned embodiment, and are not repeated here.

[0162] In this embodiment, the amplifier device 30 can also operate in the charging mode, discharging mode and maintaining mode mentioned in the above-mentioned embodiment. The only difference between it and the above-mentioned embodiment is that: when one of the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm is turned on, the fourth power switch tube S4 is turned on; when the upper power switch tubes SH1 and SH2 of the first bridge arm and the second bridge arm are both turned off, the fourth power switch tube S4 is turned off.

[0163] In the present embodiment, since the fourth power switch tube S4 is added between the voltage input terminal of the H-bridge driving circuit and the second end of the pump capacitor module, and the upper power switch tubes SH1 and SH2 in the first bridge arm and the second bridge arm are both turned off, the fourth power switch tube S4 is controlled, and the design of the upper power switch tube of the H-bridge driving circuit can be simplified while ensuring that the circuit is turned off.

[0164] It should be understood that Fig.13 and Fig.15 The pump capacitor module in the amplifier device shown in the figure can be a first capacitor or a Figure 6 As shown, it includes a first capacitor and at least one charge pump unit, which is not limited in this embodiment.

[0165] The extended structure 1 and the extended structure 2 mentioned in the embodiment of the present application can be combined to simplify the design of the upper power switch tube in the H-bridge driving circuit while recovering the energy on the pump capacitor module.

[0166] An embodiment of the present application further provides a chip, which includes the amplifier device according to any one of the aforementioned embodiments.

[0167] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or partial operations of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present application.

[0168] Those of ordinary skill in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0169] The above implementation methods are only used to illustrate the embodiments of the present application, and are not limitations on the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application. The scope of patent protection of the embodiments of the present application should be limited by the claims.

Claims

1. An amplifier device, characterized in that: include: A voltage converter and a feedback controller, wherein the voltage converter includes a switch network, a pump capacitor module, an H-bridge drive circuit and an output capacitor; The switch network includes a plurality of power switch tubes; The pump capacitor module is connected to a power supply terminal and a ground terminal via the switch network; The H-bridge driving circuit comprises a voltage input terminal connected to the pump capacitor module and a first bridge arm and a second bridge arm connected between the voltage input terminal and the ground terminal, the first bridge arm and the second bridge arm both comprise an upper power switch tube and a lower power switch tube, the connection point of the upper power switch tube and the lower power switch tube of the first bridge arm is the first output terminal of the H-bridge driving circuit, and the connection point of the upper power switch tube and the lower power switch tube of the second bridge arm is the second output terminal of the H-bridge driving circuit; The output capacitor is connected between the first output terminal and the second output terminal of the H-bridge driving circuit and is used to provide an output voltage; The feedback controller is used to control the on-off state of the power switch tubes in the switch network and the H-bridge drive circuit according to the output voltage and the preset reference voltage, so that the output voltage is equal to a preset multiple of the preset reference voltage.

2. The amplifier device according to claim 1, characterized in that The feedback controller is used to control the lower power switch tube of the first bridge arm to be turned off and the lower power switch tube of the second bridge arm to be turned on when the preset reference voltage is a positive voltage; when the preset reference voltage is a negative voltage, control the lower power switch tube of the first bridge arm to be turned on and the lower power switch tube of the second bridge arm to be turned off.

3. The amplifier device according to claim 2, characterized in that The feedback controller is used to control the on / off state of the power switch tube in the switch network and the upper power switch tube in the H-bridge drive circuit according to the comparison result of the sampled voltage of the output voltage and the preset reference voltage, so that the voltage converter operates in a charging mode; The charging mode includes a first charging stage and a second charging stage which are performed alternately; in the first charging stage, charge is conducted from the power supply end to the pump capacitor module, and in the second charging stage, charge is conducted from the pump capacitor module to the output capacitor.

4. The amplifier device according to claim 3, characterized in that The pump capacitor module comprises a first end and a second end, and the voltage input end of the H-bridge driving circuit is connected to the second end of the pump capacitor module; The feedback controller is used to: In the first charging stage, controlling the switch network to electrically connect the first end and the second end of the pump capacitor module to the ground end and the power end respectively, so as to conduct charge from the power end to the pump capacitor module; In the second charging stage, the switch network is controlled to electrically connect the first end of the pump capacitor module to the ground end or the power supply end, and the upper power switch tube of the first target bridge arm is controlled to electrically connect the second end of the pump capacitor module to the output capacitor to conduct charge from the pump capacitor module to the output capacitor; wherein the first target bridge arm is the bridge arm in which the lower power switch tube is not turned on in the first bridge arm and the second bridge arm.

5. The amplifier device according to claim 4, characterized in that The switch network includes a first power switch tube and a second power switch tube, wherein the first power switch tube is used to connect the first end of the pump capacitor module to the ground end, and the second power switch tube is used to connect the second end of the pump capacitor module to the power end; The feedback controller is used to: In the first charging stage, the first power switch tube and the second power switch tube are controlled to be turned on, and the upper power switch tubes of the first bridge arm and the second bridge arm are controlled to be turned off; In the second charging stage, if the preset reference voltage is a positive voltage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the second power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned off; if the preset reference voltage is a negative voltage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the second power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned off.

6. The amplifier device according to claim 4, characterized in that The switch network includes a first power switch tube, a second power switch tube and a third power switch tube, wherein the first power switch tube is used to connect the first end of the pump capacitor module to the ground end, the second power switch tube is used to connect the second end of the pump capacitor module to the power supply end, and the third power switch tube is used to connect the first end of the pump capacitor module to the power supply end; The feedback controller is used to: In the first charging stage, the first power switch tube and the second power switch tube are controlled to be turned on, and the third power switch tube, the upper power switch tubes of the first bridge arm and the second bridge arm are controlled to be turned off; In the second charging stage, if the preset reference voltage is a positive voltage, the third power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the first power switch tube, the second power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned off; if the preset reference voltage is a negative voltage, the third power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the first power switch tube, the second power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned off.

7. The amplifier device according to claim 3, characterized in that The feedback controller is used to control the on / off state of the power switch tube in the switch network and the upper power switch tube in the H-bridge drive circuit according to the comparison result of the sampled voltage of the output voltage and the preset reference voltage, so that the voltage converter operates in a discharge mode; The discharge mode includes a first discharge stage and a second discharge stage which are performed alternately; in the first discharge stage, the pump capacitor module releases charge, and in the second discharge stage, the output capacitor releases charge to the pump capacitor module.

8. The amplifier device according to claim 7, characterized in that The pump capacitor module comprises a first end and a second end, and the voltage input end of the H-bridge driving circuit is connected to the second end of the pump capacitor module; The feedback controller is used to: In the first discharge stage, the switch network is controlled to electrically connect the first end and the second end of the pump capacitor module to the power supply end at the same time or to the ground end and the power supply end respectively, or the switch network and the upper power switch tube of the second target bridge arm are controlled to connect the first end and the second end of the pump capacitor module to the ground end at the same time or to the power supply end or the ground end respectively, so that the pump capacitor module releases the charge; wherein the second target bridge arm is the bridge arm in which the lower power switch tube in the first bridge arm and the second bridge arm is turned on; In the second discharge stage, the upper power switch tube of the first target bridge arm is controlled to connect the second end of the pump capacitor module to the output capacitor, so that charge is released from the output capacitor to the pump capacitor module; wherein the first target bridge arm is the bridge arm in which the lower power switch tube of the first bridge arm and the second bridge arm is not turned on.

9. The amplifier device according to claim 8, characterized in that The switch network includes a first power switch tube, and the first power switch tube is used to pump the first end of the capacitor module; The feedback controller is used to: If the preset reference voltage is a positive voltage, in the first discharge stage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the upper power switch tube of the first bridge arm is controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the upper power switch tube of the second bridge arm is controlled to be turned off; If the preset reference voltage is a negative voltage, in the first discharge stage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the upper power switch tube of the second bridge arm is controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the upper power switch tube of the first bridge arm is controlled to be turned off.

10. The amplifier device according to claim 8, characterized in that The switch network includes a first power switch tube, a second power switch tube and a third power switch tube, wherein the first power switch tube is used to connect the first end of the pump capacitor module to the ground end, the second power switch tube is used to connect the second end of the pump capacitor module to the power supply end, and the third power switch tube is used to connect the first end of the pump capacitor module to the power supply end; The feedback controller is used to: If the preset reference voltage is a positive voltage, in the first discharge stage, the second power switch tube and the third power switch tube are controlled to be turned on, and the first power switch tube, the first bridge arm, and the upper power switch tube of the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the second power switch tube, the third power switch tube, and the upper power switch tube of the second bridge arm are controlled to be turned off; If the preset reference voltage is a negative voltage, in the first discharge stage, the second power switch tube and the third power switch tube are controlled to be turned on, and the first power switch tube, the first bridge arm, and the upper power switch tube of the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the second power switch tube, the third power switch tube, and the upper power switch tube of the first bridge arm are controlled to be turned off.

11. The amplifier device according to claim 8, characterized in that The switch network includes a first power switch tube and a third power switch tube, wherein the first power switch tube is used to connect the first end of the pump capacitor module to the ground end, and the third power switch tube is used to connect the first end of the pump capacitor module to the power supply end; The feedback controller is used to: If the preset reference voltage is a positive voltage, in the first discharge stage, the third power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the third power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned off; If the preset reference voltage is a negative voltage, in the first discharge stage, the third power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the third power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned off.

12. The amplifier device according to claim 8, characterized in that The switch network includes a first power switch tube and a second power switch tube, wherein the first power switch tube is used to connect the first end of the pump capacitor module to the ground end, and the second power switch tube is used to connect the second end of the pump capacitor module to the power supply end; The feedback controller is used to: If the preset reference voltage is a positive voltage, in the first discharge stage, the first power switch tube and the second power switch tube are controlled to be turned on, and the upper power switch tubes of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned on, and the second power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned off; If the preset reference voltage is a negative voltage, in the first discharge stage, the first power switch tube and the second power switch tube are controlled to be turned on, and the upper power switch tubes of the first bridge arm and the second bridge arm are controlled to be turned off; in the second discharge stage, the first power switch tube and the upper power switch tube of the second bridge arm are controlled to be turned on, and the second power switch tube and the upper power switch tube of the first bridge arm are controlled to be turned off.

13. The amplifier device according to claim 3, characterized in that The feedback controller is used to control the power switch tube in the switching network and the upper power switch tube in the H-bridge drive circuit to maintain the on-off state of the previous moment according to the comparison result of the sampling voltage of the output voltage and the preset reference voltage, so that the voltage converter operates in a maintenance mode.

14. The amplifier device according to claim 1, characterized in that The first output terminal and the second output terminal of the H-bridge driving circuit are used to be connected to a non-capacitive load, and the capacitance value of the output capacitor is greater than the total capacitance value of the pump capacitor module.

15. The amplifier device according to claim 1, characterized in that The first output terminal and the second output terminal of the H-bridge driving circuit are used to be connected to a capacitive load, and the total capacitance of the output capacitor and the capacitive load is greater than the total capacitance of the pump capacitor module.

16. The amplifier device according to claim 1, characterized in that The first output terminal and the second output terminal of the H-bridge driving circuit are used to be connected to a capacitive load, the capacitive load is used as the output capacitor, and the capacitance value of the capacitive load is greater than the capacitance value of the pumping capacitor module.

17. The amplifier device according to claim 1, characterized in that The voltage converter further comprises a diode and an input capacitor, wherein the anode of the diode is connected to the power supply terminal, the cathode of the diode is connected to the first terminal of the input capacitor, and the second terminal of the input capacitor is connected to the ground terminal; The switch network includes a first power switch tube, a second power switch tube and a third power switch tube, the pump capacitor module includes a first end and a second end, the first end of the pump capacitor module is connected to the ground end through the first power switch tube, and is connected to the power supply end through the third power switch tube, and the second end of the pump capacitor module is connected to the first end of the input capacitor through the second power switch tube.

18. The amplifier device according to claim 1, characterized in that The voltage converter further includes a fourth power switch tube, a first end of the fourth power switch tube is connected to the pump capacitor module, and a second end of the fourth power switch tube is connected to the voltage input end of the H-bridge drive circuit; Among them, when one of the upper power switch tubes of the first bridge arm and the second bridge arm is turned on, the fourth power switch tube is turned on; when the upper power switch tubes of the first bridge arm and the second bridge arm are both turned off, the fourth power switch tube is turned off.

19. The amplifier device according to claim 1, characterized in that The pump capacitor module is a first capacitor.

20. The amplifier device according to claim 1, characterized in that The pump capacitor module comprises: a first capacitor and a charge pump unit connected in series with the first capacitor, wherein the charge pump unit comprises a second capacitor, a fifth power switch tube, a sixth power switch tube and a seventh power switch tube; The first end of the first capacitor is connected to the power supply end and the ground end via the switching network, the first end of the first capacitor is connected to the first end of the second capacitor through the fifth power switch tube, and is connected to the second end of the second capacitor through the sixth power switch tube, the first end of the second capacitor is connected to the ground end through the seventh power switch tube, and the second end of the second capacitor is connected to the voltage input end of the pump capacitor module.

21. A chip, characterized in that: Comprising an amplifier device according to any one of claims 1-20.

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