Boost circuit structure, circuit system and electronic equipment

Abstract

The present invention discloses a boost circuit structure, a circuit system and an electronic device based on the structure. The boost circuit structure includes an input port for inputting a first voltage; an output port for outputting a second voltage, wherein the second voltage is higher than the first voltage; a boost circuit connected between the input port and the output port, and in response to an enable signal being in a valid state, converting the first voltage input from the input port into a second voltage, and outputting it via the output port; and a discharge circuit, wherein the first end of the discharge circuit is connected between the input port and the output port, and the second end of the discharge circuit is grounded, and is used to prevent the voltage from the output port from being fed back to the input port. Thus, the safety of the boost circuit structure is improved, so as to provide circuit safety protection for the circuit system and electronic device based on the boost circuit structure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a boost circuit structure and a circuit system and electronic equipment based on the boost circuit structure. Background Art

[0002] With the rapid development of information technology, more and more smart devices, especially portable electronic devices, have emerged, bringing many conveniences to people's work and life.

[0003] At present, some portable electronic products are powered by lithium batteries. When the lithium battery is used in a control circuit that operates at 3.3V, for example, it needs to be reduced by chopping or other means to meet the use requirements. When it is used in a control circuit that is powered by 5V or higher voltage, for example, the 3.6V of the lithium battery needs to be processed by a DC boost circuit so that the output voltage is higher than the input voltage to meet the requirements of the control circuit.

[0004] However, in some application scenarios, such as when a high-power Boost circuit is frequently turned on, output voltage backflow may occur, causing other circuits to burn out. Therefore, an improved boost circuit structure is needed to ensure the safety of other related circuits or devices. Summary of the invention

[0005] The purpose of the present disclosure is to provide an improved boost circuit structure to enhance the safety of the boost circuit structure, so as to provide circuit safety protection for circuit systems and electronic devices based on the boost circuit structure.

[0006] According to a first aspect of the present disclosure, a boost circuit structure is provided, comprising: an input port for inputting a first voltage; an output port for outputting a second voltage, wherein the second voltage is higher than the first voltage; a boost circuit connected between the input port and the output port, and in response to an enable signal being in a valid state, converting the first voltage input to the input port into a second voltage and outputting the second voltage via the output port; and a discharge circuit, wherein a first end of the discharge circuit is connected between the input port and the output port, and a second end of the discharge circuit is grounded, and is used to prevent the voltage originating from the output port from being fed back to the input port.

[0007] Optionally, the discharge circuit performs discharge when the voltage of the output port can be fed back to the input port, so as to keep the voltage of the input port below a predetermined voltage threshold.

[0008] Optionally, the discharge circuit comprises: a first control switch, wherein in response to the enable signal being in an effective state, the first control switch is turned off, and in response to the enable signal being in a disabled state, the first control switch is turned on.

[0009] Optionally, the boost circuit structure is configured such that, within a predetermined time period after the first control switch is switched from an off state to an on state, the enable signal cannot be switched to a valid state.

[0010] Optionally, the boost circuit structure further includes a first control circuit, which generates a first control signal for a first control switch based on the enable signal; or the boost circuit structure is configured to generate a first control signal for a first control switch upon receiving or generating the enable signal, wherein when the enable signal is in a valid state, the first control signal causes the first control switch to be disconnected, and when the enable signal is in a disabled state, the first control signal causes the first control switch to be turned on.

[0011] Optionally, the first end of the first control switch is connected between the boost circuit and the output port.

[0012] Optionally, the first control switch is an N-type field effect transistor (Q3).

[0013] Optionally, the discharge circuit comprises: a Zener diode, and when the voltage at the first end of the discharge circuit is higher than the clamping voltage, the Zener diode is turned on, and the discharge circuit discharges between the first end and the second end thereof.

[0014] Optionally, the clamping voltage of the voltage regulator is within the normal voltage range of the input port.

[0015] Optionally, the first end of the voltage regulator tube is connected between the input port and the boost circuit.

[0016] Optionally, it also includes: a second control switch connected between the input port and the boost circuit, in response to the enable signal being in a valid state, the second control switch is turned on, and in response to the enable signal being in a disabled state, the second control switch is turned off.

[0017] Optionally, it also includes: a second control circuit, which generates a second control signal for a second control switch based on the enable signal, wherein when the enable signal is in a valid state, the second control signal turns on the second control switch, and when the enable signal is in a disabled state, the second control signal turns off the second control switch.

[0018] Optionally, when the second control switch is turned on, the boost circuit is turned on; and / or when the second control switch is turned off, the boost circuit is turned off.

[0019] Optionally, the second control switch is a P-type field effect transistor (Q1).

[0020] Optionally, the input port is connected to a first module, the first module inputs a first voltage to the input port, the output port is connected to a second module, and the second voltage output by the output port is provided to the second module.

[0021] Optionally, the second module includes an audio playback module, and / or the first module includes at least one of the following: a charging module; a power management module; a battery module; a low voltage dropout linear regulator.

[0022] Optionally, the boost circuit may further include a switch, which is arranged between the output port and the first end of the discharge circuit or between the second end of the discharge circuit and ground, or is arranged inside the discharge circuit to enable or disable the discharge function of the discharge circuit.

[0023] Optionally, the boost circuit may further include a plurality of discharge circuits arranged in parallel.

[0024] According to the second aspect of the present disclosure, a circuit system is also proposed, comprising: a boost circuit structure as described above; a first module, connected to the input port of the boost circuit structure, and used to input a first voltage to the input port of the boost circuit structure; a second module, connected to the output port of the boost circuit structure, and the second voltage output by the output port is provided to the second module.

[0025] According to the third aspect of the present disclosure, an electronic device is also proposed, comprising: a boost circuit structure as described above; a first module, connected to the input port of the boost circuit structure, and used to input a first voltage to the input port of the boost circuit structure; a second module, connected to the output port of the boost circuit structure, and the second voltage output by the output port is provided to the second module.

[0026] Optionally, the second load module includes an audio playback module, and / or the first load module includes at least one of the following: a charging module; a power management module; a battery module; a low voltage dropout linear regulator.

[0027] Optionally, the electronic device is a smart speaker.

[0028] Therefore, the present invention increases the discharge circuit and / or control circuit so that the voltage at the output port can be discharged and dropped quickly, so as to reduce and avoid the voltage at the output port being fed back to the input port, thereby improving the safety of the boost circuit structure and providing circuit safety protection for the circuit system and electronic equipment based on the boost circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components in the exemplary embodiments of the present disclosure.

[0030] Figure 1 A schematic diagram of a boost circuit structure according to an embodiment of the present disclosure is shown.

[0031] Figure 2 A schematic diagram of a circuit structure including a Boost circuit according to an embodiment of the present disclosure is shown.

[0032] Figure 3 A schematic diagram showing a boost circuit structure according to a first embodiment of the present disclosure is shown.

[0033] Figure 4 A schematic diagram showing a boost circuit structure according to a second embodiment of the present disclosure is shown.

[0034] Figure 5 A schematic diagram showing a boost circuit structure according to a third embodiment of the present disclosure is shown.

[0035] Figure 6 A schematic diagram showing a boost circuit structure according to a fourth embodiment of the present disclosure is shown.

[0036] Figure 7 A schematic diagram of a boost circuit structure according to a fifth embodiment of the present disclosure is shown.

[0037] Figure 8 A schematic structural diagram of a circuit system according to an embodiment of the present disclosure is shown.

[0038] Fig. 9 A schematic diagram of a circuit system according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] As mentioned above, currently, when lithium batteries are used in control circuits powered by 5V or higher voltage, the 3.6V of the lithium battery needs to be processed by a DC boost circuit so that the output voltage is higher than the input voltage to meet the needs of the control circuit.

[0041] The present disclosure proposes a boost circuit structure, which can not only increase the voltage input to its input port and output it through the output port so as to provide the required electrical energy to the relevant load, but also prevent the voltage from the output port from being fed back to the input port so as to ensure the safety of other devices connected to the boost circuit structure (for example, connected to its input port), thereby improving the safety of the boost circuit structure so as to provide circuit safety protection for the circuit system and / or electronic equipment based on the boost circuit structure.

[0042] The boost circuit structure of the present disclosure, and the circuit system and / or electronic device based on the boost circuit structure will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Figure 1 A schematic diagram of a boost circuit structure according to an embodiment of the present disclosure is shown.

[0044] like Figure 1 As shown, the boost circuit structure 100 of the present disclosure may include an input port 110 , an output port 120 , a boost circuit 130 , and a discharge circuit 140 .

[0045] The input port 110 can input voltage to the boost circuit structure, and the output port 120 can output voltage to the outside (eg, to a related load connected to the output port).

[0046] For the sake of distinction, in the embodiment of the present disclosure, the voltage input through the input port 110 is referred to as the first voltage (i.e., input voltage Vin), and the voltage output through the output port 120 is referred to as the second voltage (i.e., output voltage Vout). It should be understood that the "first" and "second" mentioned in the present disclosure are only used to distinguish the description objects, and are not any limitation on their functions or order.

[0047] In the embodiment of the present disclosure, the boost circuit structure 100 can be connected to any suitable scenario, such as a circuit system or electronic device with a battery (such as a lithium battery), which will be described in detail below and will not be repeated here. Among them, the input port 110 side can be connected to a power supply network, and the power supply network can provide power through the input port 110. The output port 120 can be connected to a load network, and the related load (including a load circuit or a load device) in the load network can work based on the power provided via the output port 120.

[0048] The boost circuit 130 may be connected between the input port 110 and the output port 120 , and may convert a first voltage inputted to the input port 110 into a second voltage, and output the second voltage via the output port 120 .

[0049] In one embodiment, the working state of the boost circuit can be controlled by an enable signal (PW_EN). For example, the boost circuit 130 can work in response to the enable signal being in an effective state and convert the first voltage into a second voltage. Correspondingly, for example, when the enable signal is in a disabled state, the boost circuit 130 does not work.

[0050] As an example, the enable signal being set to a high level can be regarded as the enable signal being in an effective state, while the enable signal being set to a low level can be regarded as the enable signal being in a disabled state. The boost circuit structure can control its working state in response to whether the received signal is a high level signal or a low level signal.

[0051] In one embodiment, the boost circuit 130 may be a Boost circuit. A Boost converter (or step-up converter) is a common switching DC boost circuit that controls the inductor to store and release energy by turning on and off a switch tube, thereby making the output voltage higher than the input voltage.

[0052] Figure 2 FIG. 1 shows a schematic diagram of a circuit structure including a Boost boost circuit according to an embodiment of the present disclosure. Figure 2 The Boost circuit is connected between the input port 110 and the output port 120. Those skilled in the art should understand that Figure 2 The figure is only for the purpose of schematically illustrating the boost circuit of the present disclosure and is not intended to be limiting in any way.

[0053] like Figure 2 As shown in the figure, in this Boost circuit, U1 is Boost IC, R1 and R2 are Vout sampling feedback matching resistors, L1 is inductor, and C1 is Boost post-stage energy storage capacitor. The effective working range of input voltage Vin_3.6V is between 3-4.2V, and the output voltage Vout is fixed at 12V, and Vout output is controlled by enable signal (PW_EN).

[0054] When the Boost circuit is applied and used, the input port 110 of the Boost circuit can be connected to a power supply network, and the output port 120 is connected to a load network.

[0055] When the EN port receives an enable signal (e.g., a high-level signal) in a valid state, U1 works normally. When U1 works normally, the power supply network can input the first voltage Vin to the Boost circuit, and the Boost circuit can raise the input voltage to a second voltage Vout and provide it to the load network on the output port 120 side to provide the required electrical energy to the related devices in the load network.

[0056] When the EN port receives an enable signal in a disabled state (eg, a low level signal), U1 stops working. When U1 stops working, the Boost circuit does not raise the input voltage, and the output port side voltage Vout gradually decreases.

[0057] Among them, since the Vout end has a large energy storage capacitor C1 (1000uF), the output path impedance (including R1, R2 and the load resistance on the load network) is approximately above 30K ohms, resulting in that when the boost circuit is disconnected, the output port side voltage Vout drops very slowly, and it takes, for example, more than 30 seconds to drop to the Vin level, and it takes even longer to drop to zero potential.

[0058] In actual applications, there are situations where the boost circuit is frequently turned on. For example, within these 30 seconds, Vout has not dropped to the Vin level and the start command is received again, even if the enable signal is in a valid state, U1 works normally and the Boost circuit is turned on. At this time, since the output voltage Vout is much higher than the input voltage Vin, the input voltage is raised by the output voltage. For example, it can be raised to 4.7V in actual measurement, which is higher than the safe operating range of the circuit or device of the related power network connected to the input port 110 side. Switching the PW_EN signal multiple times in a short period of time may cause other circuits on the Vin power network to burn out.

[0059] Based on Figure 2 Adding a discharge circuit 140 to the circuit structure shown can effectively prevent other circuits on the Vin power network from burning out, thereby improving the safety of the boost circuit structure and providing circuit safety protection for the circuit system and electronic equipment based on the boost circuit structure.

[0060] return Figure 1 The discharge circuit 140 of the present disclosure can be connected between the input port 110 and the output port 120, and can be used to prevent the voltage from the output port 120 from flowing back to the input port 110, thereby preventing other circuits or devices on the power network from being burned.

[0061] In one embodiment, the first end of the discharge circuit 140 can be connected between the input port 110 and the output port 120, and the second end of the discharge circuit 140 is grounded. In this way, when the voltage of the output port 120 can be fed back to the input port 1120, discharge can be performed to maintain the voltage of the input port below a predetermined voltage threshold, thereby protecting the safety of other circuits or devices on the input port 110 side.

[0062] In the embodiment of the present disclosure, the circuit structure of the discharge circuit 140 and the devices therein may be configured according to circuit control requirements, and the present disclosure does not impose any limitation on this.

[0063] For example, the discharge circuit 140 may include a control switch (in order to distinguish it from the control switch described below, the control switch in the discharge circuit 140 described here may also be referred to as a first control switch).

[0064] The conduction of the first control switch can also be controlled by an enable signal (PW_EN). Figure 1 As shown, it can also be controlled by the signal PW_CLR_EN.

[0065] For example, in response to the enable signal being in an effective state, the first control switch may be turned off. Alternatively, in response to the enable signal being in a disabled state, the first control switch may be turned on.

[0066] Alternatively, for example, in response to the signal PW_CLR_EN being in an active state, the first control switch may be turned off. Alternatively, in response to the signal PW_CLR_EN being in a disabled state, the first control switch may be turned on.

[0067] In one embodiment, when the boost circuit structure includes both an enable signal (PW_EN) and a signal PW_CLR_EN, the enable signal (PW_EN) can be used to control the working state of the boost circuit 130, and the signal PW_CLR_EN can control the working state of the discharge circuit 140. The enable signal (PW_EN) and the signal PW_CLR_EN can be mutually exclusive.

[0068] In this way, the control of the discharge circuit 140 is opposite to that of the boost circuit 130, so that when the boost circuit 130 works normally, the discharge circuit 140 is disconnected, so that the boost circuit structure can provide power to the relevant control circuit. When the boost circuit 130 stops working, the discharge circuit 140 can be triggered to be turned on, so that the voltage of the output port can be quickly discharged to avoid the situation where the high voltage of the output port is fed back to the input port, thereby ensuring the safety of the relevant circuits or devices.

[0069] Therefore, circuit control of the entire boost circuit structure can be achieved through signal control, which can not only provide the required electrical energy for the control circuit, but also ensure the safety of the entire boost circuit structure and even the circuit system where the boost circuit structure is located.

[0070] For another example, the discharge circuit 140 may include a voltage regulator.

[0071] Among them, a voltage regulator tube with a clamping voltage within the normal voltage range of the input port can be selected. In addition, the first end of the voltage regulator tube can be connected between the input port and the boost circuit, and the second end thereof can be grounded. In this way, when the voltage at the first end of the discharge circuit is higher than the clamping voltage of the voltage regulator tube, the voltage regulator tube is turned on, and at the same time, the discharge circuit 140 discharges between its first end and the second end. Thus, by clamping the voltage of the input port below the predetermined voltage threshold, safety protection of other circuits or devices connected to the input port is achieved.

[0072] In the embodiment of the present disclosure, when the configuration of the discharge circuit is different, the connection positions of the ports of the discharge circuit 140 relative to the boost circuit structure are not completely the same, and the present disclosure does not limit this.

[0073] For example, when the discharge circuit 140 includes a control switch, the first end of the discharge circuit 140 can be connected between the boost circuit 130 and the output port 120. In this way, when the boost circuit 130 stops working, the discharge circuit 140 can discharge the output voltage Vout in time to avoid frequent activation of the boost circuit, which causes the output port voltage to flow back to the input port and raises the input port voltage, thereby burning related circuits or devices on the input port side.

[0074] For another example, when the discharge circuit 140 includes a voltage regulator, the first end of the discharge circuit 140 can be connected between the input port 110 and the boost circuit 130. In this way, when the boost circuit is frequently turned on to avoid causing the output port voltage to flow back to the input port and raising the input port voltage, the input port voltage can be maintained at the clamping potential of the voltage regulator in time when the output voltage flows back to the input port, thereby ensuring the safety of related circuits or devices on the input port side.

[0075] Therefore, the safety of the boost circuit structure is ensured by a circuit connection method that is compatible with the selected discharge circuit or device, thereby providing safety protection for a circuit system based on the boost circuit structure.

[0076] The attached figure shows a case where one discharge circuit is provided. It should be understood that multiple discharge circuits can also be provided in parallel between the output port 120 and the ground D_GND. In this way, on the one hand, the discharge current carried by each discharge circuit can be reduced; on the other hand, when a discharge circuit is damaged, other discharge circuits can continue to realize the discharge function.

[0077] In one embodiment, in order to achieve the above purposes at the same time, in the embodiment of the present disclosure, the above enable signal can be controlled by hardware, software, or a combination of hardware and software. Based on different triggering modes of the control signal, the specific configuration of the boost circuit structure may not be exactly the same.

[0078] For example, when the boost circuit 130 and the discharge circuit 140 are controlled based on the same signal (e.g., an enable signal), the boost circuit structure can be configured such that the boost circuit 140 cannot be switched to the working state within a predetermined time period after the discharge circuit 130 is switched from the off state to the on state. Thus, by controlling the working state of the boost circuit and the discharge circuit, the working state of the boost circuit and / or the discharge circuit cannot be frequently switched, and sufficient discharge time is given to the discharge circuit 140, thereby achieving safety assurance.

[0079] In combination with the specific configuration of the boost circuit 130 and the discharge circuit 140, the boost circuit structure can be configured, for example, such that the enable signal controlling the boost circuit cannot be switched to a valid state within a predetermined time period after the first control switch in the discharge circuit 140 is switched from an off state to an on state. Thus, the control switch in the discharge circuit 140 cannot frequently switch the on state, giving the discharge circuit 140 sufficient discharge time, thereby achieving safety assurance.

[0080] For another example, the boost circuit structure may further include a control circuit, which may be used to implement operation control of the discharge circuit. For example, the control circuit may generate a first control signal for the first control switch based on the enable signal. Alternatively, the boost circuit structure may also be configured to generate a first control signal for the first control switch when the enable signal is received or generated. Wherein, when the enable signal is in an effective state, the first control signal turns off the first control switch, and when the enable signal is in a disabled state, the first control switch turns on the first control switch.

[0081] The above-mentioned control circuit may further include, for example, multiple control branches, wherein some control branches are used to implement operation control of the discharge circuit, and another part of the control branches implement operation control of the boost circuit. The present disclosure does not limit its specific implementation method.

[0082] In one embodiment, the control circuit of the boost circuit structure may include, for example, a second control switch.

[0083] The second control switch may be connected between the input port 110 and the boost circuit 130. In response to the enable signal being in a valid state, the second control switch is turned on, and in response to the enable signal being in a disabled state, the second control switch is turned off. When the second control switch is turned on, the boost circuit 130 is in a normal working state, and when the second control switch is turned off, the boost circuit 130 is in a stopped working state, thereby achieving the operation control of the boost circuit.

[0084] The working state of the second control switch can be controlled based on the second control circuit.

[0085] For example, the second control circuit can generate a second control signal for the second control switch based on the enable signal. When the enable signal is in a valid state, the second control signal turns on the second control switch, and when the enable signal is in a disabled state, the second control signal turns off the second control switch. When the second control switch is turned on, the boost circuit is turned on, that is, it is in a normal working state, and when the second control switch is turned off, the boost circuit is turned off, that is, it is in a stopped working state.

[0086] Therefore, based on the boost circuit structure disclosed in the present invention, a variety of circuit control methods can be used to ensure that the voltage provided by the power supply network is converted into the high voltage required by the load network through the boost circuit structure, while also ensuring the safety of related circuits or devices on the input port side, thereby improving the safety of the boost circuit structure and providing safety protection for circuit systems or electronic equipment based on the boost circuit structure.

[0087] Additionally, a switch may be provided to enable or disable the discharge circuit as desired.

[0088] The switch may be arranged between the output port and the first end of the discharge circuit, or between the second end of the discharge circuit and the ground.

[0089] Alternatively, the switch may also be disposed inside the discharge circuit to enable or disable the discharge function of the discharge circuit.

[0090] For example, a switch may be disposed between the first end and the second end, so as to control the circuit between the first end and the second end to be turned on or off.

[0091] For another example, the switch can be set in the control circuit of the first control switch, and when the switch is set to be disabled, the first control switch does not respond to the enable signal. Even if the enable signal is in the abstinence state, the first control switch is not turned on, so that no discharge is performed.

[0092] When the switch is set to be turned on, the discharge circuit can work, and in response to the enable signal being in a disabled state, the first control switch in the discharge circuit can be turned on to perform discharge.

[0093] When the switch is set to be off, the discharge circuit no longer works, and no discharge is performed even if the above-mentioned enable signal is in a disabled state.

[0094] In order to better understand the boost circuit structure of the present disclosure, Figure 3-7 The illustrated embodiment provides a detailed description of the boost circuit structure of the present disclosure and the details involved therein.

[0095] <Example 1>

[0096] Figure 3 FIG. 1 is a schematic diagram showing a boost circuit structure according to a first embodiment of the present disclosure. Figure 3 The boost circuit structure shown in Figure 2 Based on the circuit structure shown in the figure, a discharge circuit is added.

[0097] like Figure 3 As shown, the boost circuit structure of the present disclosure may include an input port 301, an output port 302, a boost circuit 303 and a discharge circuit 305. The input port Vin is turned on and off by an enable signal (PW_EN), thereby controlling the working state of the boost circuit 303.

[0098] like Figure 3 As shown, in Figure 2 Based on the circuit shown, a discharge circuit 305 is added between the output port 302 and the boost circuit 303. The discharge circuit 305 includes a control switch Q3, and the operation of the discharge circuit is controlled by controlling the on or off of the control switch Q3.

[0099] The control switch Q3 may be, for example, an N-type MOS tube. Moreover, the G pole of Q3 is controlled by the signal PW_CLR_EN. When the signal PW_CLR_EN is in an effective state, the control switch Q3 is turned on, and the discharge circuit 305 discharges the output voltage Vout to the ground; when the signal PW_CLR_EN is in a disabled state, the control switch Q3 is turned off, and the discharge circuit 304 is in an off state.

[0100] The signal PW_CLR_EN can be mutually exclusive with the enable signal PW_EN. For example, when the enable signal PW_EN is at a high level, the signal PW_CLR_EN is at a low level; when the enable signal PW_EN is at a low level, the signal PW_CLR_EN is at a high level. In the embodiment of the present disclosure, the setting signal is in an effective state when it is at a high level, and in a disabled state when it is at a low level.

[0101] exist Figure 3 In the embodiment shown, to ensure circuit safety, it can also be set that the enable signal cannot be switched to the valid state within a predetermined time period after the control switch Q3 is switched from the off state to the on state, thereby giving the discharge circuit 305 sufficient discharge time to ensure circuit safety.

[0102] <Example 2>

[0103] Figure 4 A schematic diagram showing a boost circuit structure according to a second embodiment of the present disclosure is shown.

[0104] like Figure 4 As shown, the boost circuit structure of the present disclosure may include an input port 401 , an output port 402 , a boost circuit 403 , a control circuit 404 , and a discharge circuit 405 .

[0105] The control circuit 404 may include a P-type MOS transistor Q1 and an NPN transistor Q2. The discharge circuit 405 includes an N-type MOS transistor Q3, and the G pole of Q3 is controlled by a signal PW_CLR_EN. The boost circuit structure can also control the on / off of the input port Vin by an enable signal (PW_EN).

[0106] The signal PW_CLR_EN and the enable signal PW_EN can be mutually exclusive. For example, when the enable signal PW_EN is at a high level, the signal PW_CLR_EN is at a low level, and when the enable signal PW_EN is at a low level, the signal PW_CLR_EN is at a high level. When the enable signal PW_EN is at a high level, the enable signal is in a valid state, and when the enable signal PW_EN is at a low level, the enable signal is in a disabled state.

[0107] See also Figure 4, when the enable signal PW_EN is in the valid state and the signal PW_CLR_EN is in the disabled state, Q2 is turned on, Q1 is turned on, Q3 is turned off, U1 works normally, and the output voltage Vout outputs 12V. When the enable signal PW_EN is in the disabled state and the signal PW_CLR_EN is in the valid state, Q2 is turned off, Q1 is turned off, Q3 is turned on, U1 stops working, and the Vout voltage is discharged to the ground through the resistor R5 of the circuit where Q3 is located. The Vout voltage drop time is about 4ms, which can achieve a rapid drop in the output voltage, thereby effectively avoiding the damage of the output voltage Vout to the circuit or device in the power supply network on the input port side due to frequent switching of the PW_EN signal. At the same time, the speed of Vout voltage discharge can be controlled by adjusting the resistance size of R5, so that the boost circuit structure can be applied to various scenarios.

[0108] It can also be set so that the enable signal PW_EN cannot be switched to a valid state within a predetermined period after Q3 is switched from an off state to an on state. For example, it can be set that the PW_EN signal can be turned on again after the guarantee signal PW_CLR_EN is turned on for 4ms. In this way, it can be avoided that the output voltage is frequently switched on and off and then fed back to the input port, thereby preventing the burning of the relevant circuits or devices on the input port side.

[0109] <Example 3>

[0110] Figure 5 A schematic diagram showing a boost circuit structure according to a third embodiment of the present disclosure is shown.

[0111] like Figure 5 As shown, the boost circuit structure of the present disclosure may include an input port 501 , an output port 502 , a boost circuit 503 , a control circuit 504 , and a discharge circuit 505 .

[0112] and Figure 4 Compared with the boost circuit structure shown in the figure, Figure 5 The boost circuit structure shown in the figure is used to control the conduction and / or disconnection of the discharge circuit 505.

[0113] See also Figure 5 The control circuit 504 may include a P-type MOS transistor Q1 and an NPN-type transistor Q2, and a signal PW_CLR_EN is derived from the G pole of Q1 and the C pole of Q2.

[0114] The discharge circuit 505 includes an N-type MOS transistor Q3, and the G pole of Q3 is controlled by a signal PW_CLR_EN.

[0115] See also Figure 5, when Q2 is turned on, Q1 is turned on, Q3 is turned off, U1 works normally, and the output voltage Vout outputs 12V. When Q2 is turned off, Q1 is turned off, Q3 is turned on, U1 stops working, and the Vout voltage is discharged to the ground through the resistor R5 of the circuit where Q3 is located. The Vout voltage drop time is about 4ms, which can achieve a rapid drop in the output voltage, thereby effectively avoiding the frequent switching of the PW_EN signal and causing the output voltage Vout to damage the circuit or device in the power supply network on the input port side. At the same time, the speed of Vout voltage discharge can be controlled by adjusting the resistance of R5, so that the boost circuit structure can be applied to various scenarios.

[0116] <Example 4>

[0117] Figure 6 A schematic diagram showing a boost circuit structure according to a fourth embodiment of the present disclosure is shown.

[0118] like Figure 6 As shown, the boost circuit structure may include an input port 601 , an output port 602 , a boost circuit 603 and a discharge circuit 605 .

[0119] The discharge circuit 605 may include a voltage regulator ZD1, and the clamping voltage of the voltage regulator may be 3.7 V. It should be understood that in other embodiments, voltage regulators with other clamping voltages may be selected according to the requirements of the control circuit, and the present disclosure does not limit this.

[0120] See also Figure 6 When the enable signal is in a valid state, U1 works normally, the first voltage inputted at the input port 601 is about 3.6V, and the boost circuit 603 can boost the first voltage to a second voltage (fixed at 12V) and output it via the output port 602. The first voltage at the input port 601 is lower than the clamping voltage 3.7V of the voltage regulator ZD1, so at this moment, the voltage regulator ZD1 is not working.

[0121] When the enable signal is in the disabled state, U1 stops working and the output voltage Vout starts to drop from 12 V. When the output voltage Vout does not drop to the safe operating range of Vin and receives the enable signal in the valid state again, U1 works normally again. At this time, the output voltage is fed back to the input port 601, thereby raising the voltage on the input port 601 side.

[0122] When the voltage on the input port 601 side is higher than the clamping voltage of the Zener diode (eg 3.7V), the Zener diode ZD1 works and clamps the input port voltage Vin at about 3.7V, thereby ensuring the safety of related circuits or devices connected to the input port 601 .

[0123] Furthermore, the resistor R7 can be adjusted to protect and limit the current of the voltage regulator ZD1, so that the voltage of the input port can be clamped below a predetermined voltage threshold, thereby protecting the safety of the circuit or device.

[0124] <Example 5>

[0125] Figure 7 A schematic diagram of a boost circuit structure according to a fifth embodiment of the present disclosure is shown.

[0126] like Figure 7 As shown, the boost circuit structure includes an input port 701, an output port 702, a boost circuit 703, a control circuit 704 and a discharge circuit 705. Figure 7 The boost circuit structure shown is similar to Figure 6 Compared with the boost circuit structure shown in the figure, a control circuit 704 is added, and the control circuit 704 can realize circuit control of the boost circuit structure, so as to provide the required electric energy for the relevant load on the output port 702 side.

[0127] The control circuit 704 and Figure 4 The control circuit 404 is similar to the control circuit 404 shown in FIG. 1 , Q1 is a P-type MOS tube, and Q2 is an NPN-type transistor. The discharge circuit 705 is similar to the control circuit 404 shown in FIG. Figure 6 The discharge circuit 605 shown is similar, and includes a voltage regulator diode ZD1 with a clamping voltage of 3.7V.

[0128] See also Figure 7 When the enable signal PW_EN is in a valid state, Q1 is turned on, Q2 is turned on, and U1 is in a normal working state. At this time, the input voltage Vin is 3.6V and the output voltage Vout is fixed at 12V.

[0129] When the enable signal PW_EN is in the disabled state, Q1 is turned off, Q2 is disconnected, U1 stops working, and the output voltage Vout drops. During the period when the output voltage Vout drops, when the enable signal PW_EN in the valid state is received again to start the boost function of the boost circuit structure, the output voltage is higher than the input port voltage, causing the output voltage to be fed back to the input port, so that the voltage on the input port side will be raised, and the voltage regulator ZD1 connected to the input port can clamp the input voltage within the normal voltage range. In this way, the safety of other circuits or devices in the power supply network on the input port side is guaranteed.

[0130] So far, it has been combined Figure 3-Figure 7 The specific implementation of the boost circuit structure disclosed in the present invention is described in detail.

[0131] The boost circuit structure disclosed above can, on the one hand, ensure that the output voltage Vout is quickly discharged and dropped by adding a controllable switch MOS tube and a discharge MOS tube, so as to ensure that the input voltage is lower than a predetermined voltage threshold, reduce or avoid the output voltage Vout from being fed back to the input port, thereby ensuring the safety of other circuits or devices on the input port side. On the other hand, it is also possible to add a voltage regulator tube at the input end to clamp the input voltage within a normal range, thereby ensuring the safety of other circuits or devices on the input port side.

[0132] Therefore, it is possible to realize circuit control of the boost circuit structure, thereby providing the required electric energy for the relevant load, and to ensure the safety of the relevant circuit or device, thereby providing the safety of the boost circuit structure. Further, it provides safety protection for the circuit system or electronic equipment based on the boost circuit structure.

[0133] As mentioned above, the boost circuit structure disclosed in the present invention can be applied to any suitable circuit system or electronic device.

[0134] Figure 8 A schematic diagram of the structure of a circuit system according to an embodiment of the present disclosure is shown, wherein the circuit system may be, for example, a partial circuit in an electronic device (such as a smart speaker).

[0135] like Figure 8 As shown, the circuit system may include the above-mentioned boost circuit structure 810 , a first module 820 and a second module 830 .

[0136] The first module 820 may be connected to the input port 811 of the boost circuit structure 810 and used to input a first voltage to the input port of the boost circuit structure.

[0137] The second module 830 may be connected to the output port 812 of the boost circuit structure 810 , and the second voltage outputted by the output port 812 may be provided to the second module.

[0138] in, Figure 8 The arrow shown in FIG. 1 is used to indicate the current flow of the circuit system under normal working conditions.

[0139] Fig. 9 A schematic diagram of a circuit system according to an embodiment of the present disclosure is shown, wherein the circuit system may also be, for example, a partial circuit in an electronic device (such as a smart speaker).

[0140] like Fig. 9 As shown, the circuit system may include a boost circuit structure 910 , a first module 920 and a second module 930 .

[0141] The first module 920 may be connected to the input port 911 of the boost circuit structure 910 and used to input a first voltage to the input port of the boost circuit structure.

[0142] The second module 930 may be connected to the output port 912 of the boost circuit structure 910 , and the second voltage outputted by the output port 912 may be provided to the second module 930 .

[0143] See also Fig. 9 The first module 920 connected to the input port 911 of the boost circuit structure 910 may include a power supply network, for example, a charging module (Charger), a power management module (PMU), a battery module (such as a lithium battery LiBattery), a low-dropout linear regulator (LDO) and other devices such as a charging interface (DC-IN). Each device corresponds to its own operating voltage range. For example, the operating voltage range of LDO is 3-4.2V, the operating voltage range of Charger is 3-4.5V, and the operating voltage range of lithium battery (Li Battery) is 3.7V.

[0144] The second module connected to the output port 912 of the boost circuit structure 910 may include a load network, for example, an audio digital signal processing module (Audio DSP) or a power amplifier (Class DAMP). The output port Vout is fixed at 12V.

[0145] Therefore, through the above-mentioned circuit system, the required electrical energy can be provided to the electronic equipment based on the circuit system, and the safety of related circuits or devices can be guaranteed, thereby improving the safety of the circuit system.

[0146] So far, the boost circuit structure according to the present invention, and the circuit system and electronic device based on the boost circuit structure have been described in detail with reference to the accompanying drawings. It should be understood that the circuit structure or related circuit control method mentioned above are all examples for implementing the boost circuit structure of the present disclosure or the circuit system or electronic device based on the boost circuit structure, rather than any limitation on the circuit structure or circuit control method of the present disclosure. The above effects achieved based on other circuit structures or circuit control methods can all be regarded as one of the implementation methods of the present disclosure, and the present disclosure does not limit this.

[0147] Based on the boost circuit structure disclosed in the present invention, a variety of circuit control methods and circuit structure implementation methods can be used to convert the voltage provided by the power supply network into the high voltage required by the load network while ensuring the safety of related circuits or devices on the input port side, thereby improving the safety of the boost circuit structure and providing safety protection for circuit systems or electronic equipment based on the boost circuit structure.

[0148] In addition, the method according to the present invention may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing the above steps defined in the above method of the present invention.

[0149] Alternatively, the present invention may also be implemented as a non-temporary machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) on which executable code (or computer program, or computer instruction code) is stored. When the executable code (or computer program, or computer instruction code) is executed by a processor of an electronic device (or computing device, server, etc.), the processor executes the various steps of the above-mentioned method according to the present invention.

[0150] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or a combination of both.

[0151] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system and method according to multiple embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or code, and the part of the module, program segment or code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0152] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A boost circuit structure, characterized in that: include: An input port, used for inputting a first voltage; an output port, configured to output a second voltage, wherein the second voltage is higher than the first voltage; a boost circuit connected between the input port and the output port, and in response to the enable signal being in a valid state, converting a first voltage inputted from the input port into a second voltage, and outputting the second voltage via the output port; a discharge circuit, wherein a first end of the discharge circuit is connected between the input port and the output port, and a second end of the discharge circuit is grounded, and is used to prevent a voltage from the output port from flowing back to the input port, The discharge circuit discharges when the voltage of the output port can be fed back to the input port to keep the voltage of the input port below a predetermined voltage threshold. The discharge circuit comprises: a first control switch, in response to the enable signal being in an effective state, the first control switch is turned off, in response to the enable signal being in a disabled state, the first control switch is turned on, The boost circuit structure further includes a first control circuit, which generates a first control signal for a first control switch based on the enable signal; or The boost circuit structure is configured to generate a first control signal for a first control switch when the enable signal is received or generated. Wherein, when the enable signal is in a valid state, the first control signal turns off the first control switch, and when the enable signal is in a disabled state, the first control signal turns on the first control switch.

2. The boost circuit structure according to claim 1, characterized in that: The boost circuit structure is configured such that the enable signal cannot switch to an active state within a predetermined time period after the first control switch switches from an off state to an on state.

3. The boost circuit structure according to claim 1, characterized in that: A first end of the first control switch is connected between the boost circuit and the output port.

4. The boost circuit structure according to claim 1, characterized in that: The first control switch is an N-type field effect transistor (Q3).

5. The boost circuit structure according to claim 1, characterized in that: The discharge circuit comprises: A Zener diode is turned on when the voltage at the first end of the discharge circuit is higher than the clamping voltage of the Zener diode, and the discharge circuit discharges between the first end and the second end thereof.

6. The boost circuit structure according to claim 5, characterized in that: The clamping voltage of the voltage regulator is within the normal voltage range of the input port.

7. The boost circuit structure according to claim 6, characterized in that: The first end of the voltage regulator is connected between the input port and the boost circuit.

8. The boost circuit structure according to claim 1, characterized in that: Also includes: The second control switch is connected between the input port and the boost circuit. In response to the enable signal being in an effective state, the second control switch is turned on. In response to the enable signal being in a disabled state, the second control switch is turned off.

9. The boost circuit structure according to claim 8, characterized in that: Also includes: The second control circuit generates a second control signal for the second control switch based on the enable signal, Wherein, when the enable signal is in a valid state, the second control signal turns on the second control switch, and when the enable signal is in a disabled state, the second control signal turns off the second control switch.

10. The boost circuit structure according to claim 8, characterized in that: When the second control switch is turned on, the boost circuit is turned on; and / or When the second control switch is turned off, the boost circuit is turned off.

11. The boost circuit structure according to claim 8, characterized in that: The second control switch is a P-type field effect transistor (Q1).

12. The boost circuit structure according to claim 1, characterized in that: The input port is connected to a first module, and the first module inputs a first voltage to the input port. The output port is connected to a second module, and the second voltage output by the output port is provided to the second module.

13. The boost circuit structure according to claim 12, characterized in that: The second module includes an audio playback module, and / or The first module includes at least one of the following: Charging module; Power management module; Battery module; Low dropout linear regulator.

14. The boost circuit structure according to claim 1, characterized in that: Also includes: A switch is arranged between the output port and the first end of the discharge circuit or between the second end of the discharge circuit and the ground, or is arranged inside the discharge circuit to enable or disable the discharge function of the discharge circuit.

15. The boost circuit structure according to claim 1, characterized in that: It comprises a plurality of the discharge circuits arranged in parallel.

16. A circuit system, characterized in that: include: The boost circuit structure according to any one of claims 1 to 15; A first module, connected to the input port of the boost circuit structure, and used to input a first voltage to the input port of the boost circuit structure; The second module is connected to the output port of the boost circuit structure, and the second voltage output by the output port is provided to the second module.

17. An electronic device, characterized in that: include: The boost circuit structure according to any one of claims 1 to 15; A first module, connected to the input port of the boost circuit structure, and used to input a first voltage to the input port of the boost circuit structure; The second module is connected to the output port of the boost circuit structure, and the second voltage output by the output port is provided to the second module.

18. The electronic device according to claim 17, characterized in that: The second module includes an audio playback module, and / or The first module includes at least one of the following: Charging module; Power management module; Battery modules; Low dropout linear regulator.

19. The electronic device according to claim 17, characterized in that: The electronic device is a smart speaker.

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