Circuit device and electronic device including the same

Abstract

The utility model relates to a circuit device and electronic equipment comprising the same. According to an embodiment, a circuit device may include a first functional circuit, a power supply circuit for supplying power to the first functional circuit, a first voltage detection circuit for detecting a supply voltage, and a control circuit. When the first voltage detection circuit detects that the power supply voltage is higher than or equal to a first threshold voltage, a first detection signal is sent to the control circuit, and the control circuit controls the power supply circuit in response to the first detection signal, so that the power supply circuit uses the power supply voltage to supply power to the first functional circuit. When the first voltage detection circuit detects that the power supply voltage is lower than the first threshold voltage, a second detection signal is sent to the control circuit, the control circuit controls the power supply circuit in response to the second detection signal, and the first voltage detection circuit detects that the power supply voltage is lower than the first threshold voltage. And the power supply circuit provides boost voltage higher than the power supply voltage to supply power to the first functional circuit.

Description

Technical Field

[0001] The utility model generally relates to the field of electronic circuits, and more particularly, to a circuit device and an electronic device comprising the circuit device. Background Art

[0002] Battery capacity has always been one of the pain points of portable electronic devices. It is expected to provide batteries with larger capacity, smaller size and lighter weight to extend the use time of electronic devices after each charge and make them easy to carry. Battery energy density is positively correlated with the specific capacity of the negative electrode material. The specific capacity of the currently used graphite negative electrode has reached about 360mAh / g, close to the theoretical specific capacity limit of 372mAh / g. The theoretical specific capacity of silicon-based negative electrode materials is as high as 4200mAh / g, which is more than 10 times that of graphite negative electrodes. Therefore, it is a very promising next-generation high-energy-density lithium-ion battery negative electrode material.

[0003] During the use of the battery, the battery voltage will drop along with the discharge process. In order to prevent irreversible damage to the battery caused by over-discharge, when the battery voltage drops to a predetermined value, the electronic device will be forced to shut down and terminate the discharge process. This predetermined voltage value is also called the discharge cut-off voltage. Utility Model Content

[0004] The discharge cut-off voltage of lithium-ion batteries using graphite negative electrodes is generally around 3.0V, and the specific voltage value may vary depending on the positive and negative electrode materials used in the battery. When approaching the discharge cut-off voltage, the internal resistance of the battery will increase, resulting in the voltage actually provided to the external load being lower than the discharge cut-off voltage. In addition, considering that the voltage provided by the power supply circuit of an electronic device generally fluctuates by hundreds of millivolts, which is called voltage ripple in the industry, the minimum voltage value actually provided to the external load will be lower. On the other hand, some semiconductor components have a minimum operating voltage and must operate normally at a voltage greater than the minimum operating voltage. For example, the minimum on-voltage of a field effect transistor is generally above 1V. When designing an electronic circuit, it is necessary to consider the voltage drop on each component in the circuit to ensure that each component in the circuit can operate normally within the normal power supply voltage range. When the power supply voltage is lower than the minimum voltage threshold, some components in the circuit may not operate normally. At this time, a shutdown operation needs to be performed to avoid misoperation or damage to the circuit. This minimum voltage threshold is generally called the shutdown voltage, or the Under-Voltage LockOut (UVLO) threshold. At present, for lithium-ion batteries with commonly used graphite negative electrodes, the shutdown voltage is generally set at around 2.5-2.8 V. When it is detected that the power supply voltage drops to the shutdown voltage, the normal operation of the circuit will be stopped.

[0005] It is expected that when silicon-based negative electrode materials are used in the future, due to the charge and discharge characteristics of silicon-based negative electrodes, the discharge cut-off voltage of lithium-ion batteries will be reduced, for example, to about 2.7V or even 2.5V. Considering factors such as battery internal resistance and voltage ripple, the shutdown voltage of electronic circuits can theoretically be reduced to about 1.9-2.2V. A lower shutdown voltage is also conducive to more fully utilizing the power stored in the battery. However, before the battery voltage drops to 1.9V, some semiconductor components in the circuit may not be able to operate normally. Therefore, how to achieve a lower shutdown voltage to fully utilize the power stored in the battery while ensuring that the circuit can operate normally before the shutdown operation is performed is a technical problem that needs to be solved.

[0006] It should be understood that the various voltage values ​​given above are merely examples and may vary depending on the specific application.

[0007] In view of the above and other problems, the present utility model is proposed.

[0008] One aspect of the utility model provides a circuit device, comprising: a first functional circuit; a power supply circuit for supplying power to the first functional circuit; a first voltage detection circuit for detecting a power supply voltage; and a control circuit. When the first voltage detection circuit detects that the power supply voltage is higher than or equal to a first threshold voltage, a first detection signal is sent to the control circuit. In response to the first detection signal, the control circuit controls the power supply circuit so that the power supply circuit provides the power supply voltage to supply power to the first functional circuit. When the first voltage detection circuit detects that the power supply voltage is lower than the first threshold voltage, a second detection signal is sent to the control circuit. In response to the second detection signal, the control circuit controls the power supply circuit so that the power supply circuit provides a boost voltage higher than the power supply voltage to supply power to the first functional circuit.

[0009] In an exemplary embodiment, the power supply circuit includes a boost circuit that receives a power supply voltage. In response to the first detection signal, the control circuit controls the boost circuit to operate in a pass-through mode to provide the power supply voltage to power the first functional circuit; in response to the second detection signal, the control circuit controls the boost circuit to operate in a boost mode to provide the boost voltage to power the first functional circuit.

[0010] In an exemplary embodiment, the power supply circuit includes: a first power supply interface for receiving the power supply voltage; and a second power supply interface for receiving the boost voltage. In response to the first detection signal, the control circuit controls the power supply circuit to provide the power supply voltage received on the first power supply interface to the first functional circuit; in response to the second detection signal, the control circuit controls the power supply circuit to provide the boost voltage received on the second power supply interface to the first functional circuit.

[0011] In an exemplary embodiment, the power supply circuit includes a boost circuit and a bypass path connected in parallel with the boost circuit, and the input ends of the boost circuit and the bypass path are used to receive the power supply voltage. In response to the first detection signal, the control circuit controls the power supply circuit so that the bypass path is electrically connected to the first functional circuit and the electrical connection between the boost circuit and the first functional circuit is disconnected, thereby using the power supply voltage to power the first functional circuit; in response to the second detection signal, the control circuit controls the power supply circuit so that the boost circuit is electrically connected to the first functional circuit and the electrical connection between the bypass path and the first functional circuit is disconnected, thereby using the boost voltage output by the boost circuit to power the first functional circuit.

[0012] In an exemplary embodiment, the circuit device further includes: a second voltage detection circuit for detecting the power supply voltage. When the second voltage detection circuit detects that the power supply voltage is higher than or equal to a second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit to supply power to the first functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit to stop supplying power to the first functional circuit.

[0013] In an exemplary embodiment, the circuit device further includes: a second functional circuit. When the control circuit enables the power supply circuit, the power supply circuit provides a boosted voltage to supply power to the second functional circuit; when the control circuit disables the power supply circuit, the power supply circuit stops supplying power to the second functional circuit.

[0014] In an exemplary embodiment, the boost circuit is a first boost circuit, the power supply circuit further includes a second boost circuit, and the circuit device further includes a second functional circuit and a second voltage detection circuit for detecting the power supply voltage. When the second voltage detection circuit detects that the power supply voltage is higher than or equal to a second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby using the boost voltage provided by the second boost circuit to supply power to the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping supplying power to the second functional circuit.

[0015] In an exemplary embodiment, the circuit device further includes: a second functional circuit; and a second voltage detection circuit for detecting the power supply voltage. When the second voltage detection circuit detects that the power supply voltage is higher than or equal to a second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby providing the boost voltage received on the second power interface to the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping power supply to the second functional circuit.

[0016] In an exemplary embodiment, the circuit device further includes: a second functional circuit; and a second voltage detection circuit for detecting the power supply voltage. When the second voltage detection circuit detects that the power supply voltage is higher than or equal to a second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby using the boosted voltage provided by the boost circuit to supply power to the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping supplying power to the second functional circuit.

[0017] Another aspect of the present invention provides an electronic device, which comprises the above circuit device.

[0018] In an exemplary embodiment, the electronic device is a battery-powered portable electronic device.

[0019] In the above embodiments of the utility model, when the power supply voltage is higher than or equal to the predetermined value, the power supply voltage can be used to power the functional circuit; when the power supply voltage is lower than the predetermined value, the boost voltage can be used to power the functional circuit. In this way, the shutdown voltage can be set lower to fully utilize the battery power, while ensuring that the circuit can operate normally before the voltage drops to the shutdown voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0021] Figure 2 is a circuit diagram of a power supply circuit in a circuit device according to an embodiment of the utility model.

[0022] Figure 3 This is a circuit diagram of a voltage boost circuit that can be used in a power supply circuit.

[0023] Figure 4 is a circuit diagram of another voltage boost circuit that can be used in a power supply circuit.

[0024] Figure 5 is a circuit diagram of a power supply circuit in a circuit device according to an embodiment of the utility model.

[0025] Figure 6 is a circuit diagram of a power supply circuit in a circuit device according to an embodiment of the utility model.

[0026] Figure 7 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0027] Figure 8 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0028] Fig. 9 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0029] Fig.10 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0030] Fig.11 is a block diagram of a circuit device according to an embodiment of the present utility model.

[0031] Fig.12 is a flow chart of a power supply method for a circuit device according to an embodiment of the present invention.

[0032] Fig.13 is a flow chart of a power supply method for a circuit device according to an embodiment of the present invention.

[0033] Fig.14 It is a block diagram of an electronic device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the accompanying drawings may not be drawn to scale.

[0035] Figure 1 FIG. 1 is a block diagram of a circuit device 100 according to an embodiment of the present invention. Figure 1 As shown, the circuit device 100 may include a first functional circuit 110, a power supply circuit 120 for supplying power to the first functional circuit 110, a first voltage detection circuit 130 for detecting a power supply voltage, and a control circuit 140. The present invention does not have any special restrictions on the circuit device 100, which may be any circuit device, examples of which include but are not limited to an audio amplifier circuit, a motor drive circuit, a power amplifier circuit, a signal processing circuit, etc. The first functional circuit 110 may be a circuit that implements any function in the circuit device 100, and the present invention does not have any special restrictions on it. In one embodiment, the power supply voltage for supplying power to the circuit device 100 may be, for example, a battery voltage V BAT , the first functional circuit 110 can be a power supply voltage such as a battery voltage V BAT A circuit that is powered enough to perform normal operations.

[0036] like Figure 1 As shown, the first voltage detection circuit 130 can detect the power supply voltage for the circuit device 100, such as the battery power supply V BAT . When the first voltage detection circuit 130 detects that the power supply voltage is higher than or equal to the first threshold voltage, a first detection signal can be sent to the control circuit 140; when the first voltage detection circuit 130 detects that the power supply voltage is lower than the first threshold voltage, a second detection signal can be sent to the control circuit 140, so that the control circuit 140 can know the state of the power supply voltage, that is, whether it is lower than the first threshold voltage. Here, the first threshold voltage can be the minimum power supply voltage required for the normal operation of the first functional circuit 110, but when the power supply of the circuit device 100, such as a battery, provides the first threshold voltage, the battery has not yet reached the discharge cut-off state, that is, the battery still stores charge that can be discharged for use by the circuit device 100. For example, when the battery adopts a silicon-based negative electrode, it can achieve a lower discharge cut-off voltage compared to a traditional graphite negative electrode, but before the battery reaches the discharge cut-off state, because the power supply voltage provided to the external load gradually decreases with the discharge process, it may decrease to a level that is insufficient to power the functional circuit for its normal operation. Therefore, in Figure 1In the illustrated embodiment, by using the first voltage detection circuit 130 to detect the power supply voltage for powering the circuit device 100 , it can be determined whether the power supply voltage drops to a level insufficient to normally power the first functional circuit 110 , that is, whether it is less than the first threshold voltage.

[0037] In an exemplary embodiment, the first voltage detection circuit 130 may include, for example, a voltage sampling circuit for obtaining a power supply voltage, and a comparison circuit for comparing a sampled voltage representing the power supply voltage with a reference voltage representing a first threshold voltage, and the comparison circuit may output a first detection signal or a second detection signal based on the comparison result. In an embodiment, the first detection signal and the second detection signal may correspond to a high (or low) level signal and a low (or high) level signal output by the same output port of the comparison circuit and transmitted on the same signal line, respectively. It should be understood that the first voltage detection circuit 130 may also adopt any other circuit structure. For example, the first voltage detection circuit 130 may write the comparison result between the power supply voltage and the first threshold voltage into a register, and the control circuit 140 determines the state of the power supply voltage, that is, whether it is less than the first threshold voltage, by reading the register value.

[0038] Continue to refer to Figure 1 When receiving a first detection signal indicating that the power supply voltage is higher than or equal to the first threshold voltage, the control circuit 140 can control the power supply circuit 120 so that the power supply circuit 120 provides a power supply voltage such as a battery voltage V BAT The first functional circuit 110 is powered. When a second detection signal indicating that the power supply voltage is lower than the first threshold voltage is received, the power supply voltage is insufficient to maintain the normal operation of the first functional circuit 110. Therefore, the control circuit 140 can control the power supply circuit 120 so that the power supply circuit 120 provides a boost voltage PVDD higher than the power supply voltage at this time to power the first functional circuit 110. In this way, even if the power supply voltage drops to a level that is insufficient to power the first functional circuit 110 during the discharge process, the circuit device 100 can still continue to be powered before the power supply, such as a battery, reaches a discharge cut-off state, that is, the boost voltage PVDD is used to maintain the normal operation of the first functional circuit 110. The boost voltage PVDD can be a voltage regulator of the power supply voltage V BAT The voltage V obtained after the voltage boost process is BAT Higher voltages, as will be described in further detail in the examples below.

[0039] Figure 2 FIG. 1 is a circuit diagram of a power supply circuit 120 in a circuit device 100 according to an embodiment of the present invention. Figure 2 As shown, the power supply circuit 120 may include a boost circuit 122, and the boost circuit 122 receives a power supply voltage V BATIn this embodiment, the boost circuit 122 can operate in two different modes: the first mode is a direct mode, in which the boost circuit 122 directly outputs the power supply voltage V BAT The second mode is the boost mode, in which the boost circuit 122 receives the power supply voltage V BAT Boosting is performed to obtain a voltage higher than the power supply voltage V BAT A higher boost voltage PVDD is generated, thereby using the boost voltage PVDD to power the first functional circuit 110. Figure 2 In the illustrated embodiment, the control circuit 140 can control the boost circuit 122 to operate in a pass-through mode in response to the first detection signal to provide a power supply voltage V BAT In response to the second detection signal, the control circuit 140 can control the boost circuit 122 to operate in the boost mode to provide the boost voltage PVDD to power the first functional circuit 110. It can be understood that the boost circuit 122 performs the boost operation only when needed, and directly uses the power supply voltage to power the first functional circuit 110 when the power supply voltage is high enough, which can improve the power supply efficiency, avoid energy loss caused by the boost process, and thus extend the battery life.

[0040] Examples of circuits that can be used as the boost circuit 122 include, but are not limited to, a DC-DC boost circuit, a charge pump, etc. Figure 3 and Figure 4 The circuit diagrams of the DC-DC boost circuit and the charge pump are shown respectively. Figure 3 The DC-DC boost circuit 10 may include an inductor 11, a capacitor 12, a first switch S1 and a second switch S2. The inductor 11 may be connected to receive an input voltage V in The input terminal provides the output voltage V out The first switch S1 is connected between the output end of the inductor 11 and the output end of the circuit V out The second switch S2 is connected between the node between the inductor 11 and the first switch S1 and the ground, and the capacitor 12 is connected between the circuit output terminal V out and ground. The first switch S1 and the second switch S2 can be formed by field effect transistors, or the first switch S1 can be replaced by a diode. When the first switch S1 is opened and the second switch S2 is closed, the input voltage V in The inductor 11 can be charged, and the inductor 11 converts the electrical energy into magnetic energy and stores it. At this time, the capacitor 12 can be discharged to maintain the output voltage V out When the first switch S1 is closed and the second switch S2 is open, the magnetic energy stored in the inductor 11 is converted into electrical energy to provide an output voltage V out, and the capacitor 12 can be charged at this time. By controlling the on (ON) and off (OFF) time of the first switch S1 and the second switch S2, or the duty cycle of the control signal, the input voltage V in Higher output voltage V out , that is, it works in boost mode. If the first switch S1 is kept closed and the second switch S2 is opened, the output voltage V out Equal to the input voltage V in , that is, the DC-DC boost circuit 10 operates in the direct-through mode. It can be understood that the DC-DC boost circuit 10 is not limited to Figure 3 The circuit structure shown in the figure may have many modifications, and various existing or future developed DC-DC boost circuits may be used as the boost circuit 122 of the present invention.

[0041] Figure 4 FIG. 2 shows a circuit diagram of the charge pump 20. Figure 4 As shown, the charge pump 20 may include a charge pump 20 that receives an input voltage V in The input terminal and output voltage V out The first switch S1 and the second switch S2 are connected in series between the input terminal and the output terminal, the third switch S3 and the fourth switch S4 are connected in series between the input terminal and the ground, and the capacitor 21 is connected between the node between the first switch S1 and the second switch S2 and the node between the third switch S3 and the fourth switch S4. Each of the switches S1, S2, S3 and S4 can be formed by, for example, a field effect transistor. When the first switch S1 and the fourth switch S4 are closed, and the second switch S2 and the third switch S3 are opened, the input voltage V in When the first switch S1 and the fourth switch S4 are opened, and the second switch S2 and the third switch S3 are closed, the capacitor 21 is discharged at the output terminal. in is connected to the opposite plate of capacitor 21, and the voltage across capacitor 21 cannot change immediately, so the output voltage V out is the input voltage V in 2 times, that is, V out =2V in In addition, if the first switch S1 and the second switch S2 are always closed, and the third switch S3 and the fourth switch S4 are always open, the charge pump 20 operates in the pass-through mode, and the output voltage V out Equal to the input voltage V in , that is, V out =V in It is understood that the charge pump 20 is not limited to Figure 4The circuit structure shown in the figure may have many modifications, and various existing or future developed charge pumps may be used as the boost circuit 122 of the present invention.

[0042] Figure 5 FIG. 1 is a circuit diagram of a power supply circuit 120 according to an embodiment of the present invention. Figure 2 The power supply circuit shown differs in that Figure 5 The power supply circuit shown may not include a boost circuit, but receive a boost voltage provided externally. For example, when the circuit device 100 is implemented as a chip for realizing a specific function or purpose, a boost circuit ( Figure 2 ), for example, referring to FIG. Figure 3 and Figure 4 The DC-DC boost circuit or charge pump described herein may not include a boost circuit in the chip ( Figure 5 ), but rather receives an externally provided boost voltage.

[0043] Reference Figure 1 and Figure 5 The power supply circuit 120 may include a circuit for receiving a power supply voltage V BAT The first power interface 121 and the second power interface 123 for receiving the boost voltage PVDD can both receive voltages for powering the first functional circuit 110. A first switch S1 is provided on the transmission path connected to the first power interface 121, and a second switch S2 is provided on the transmission path connected to the second power interface 123. The control circuit 140 can control the power supply circuit 120 to close the first switch S1 and open the second switch S2 in response to the first detection signal, so as to increase the power supply voltage V received on the first power interface 121. BAT Provided to the first functional circuit 110. When receiving the second detection signal, the control circuit 140 can control the power supply circuit 120 to open the first switch S1 and close the second switch S2 to provide the boost voltage PVDD received on the second power interface 123 to the first functional circuit 110.

[0044] Figure 6 FIG. 1 is a circuit diagram of a power supply circuit 120 according to an embodiment of the present invention. Figure 2 The power supply circuit shown is similar, Figure 6 The embodiment of the power supply circuit shown also includes a boost circuit 122, but differs in that it also includes a bypass path 124 connected in parallel with the boost circuit 122, that is, an input end of the bypass path 124 is connected to an input end of the boost circuit 122, and both receive a power supply voltage V BATThe output end of the bypass path 124 is connected to the output end of the boost circuit 122, and a first switch S1 and a second switch S2 are respectively provided on the branch where the bypass path 124 and the boost circuit 122 are located to control the conduction and disconnection of each branch.

[0045] Reference Figure 1 and Figure 6 When the control circuit 140 receives the first detection signal provided by the first voltage detection circuit 130, the control circuit 140 can control the power supply circuit 120 to close the first switch S1 and open the second switch S2, so that the bypass path 124 is electrically connected to the first functional circuit 110 to receive the power supply voltage V BAT The voltage PVDD is directly provided to the first functional circuit 110 through the bypass path 124, without using the boost circuit 122 to power the first functional circuit 110. When receiving the second detection signal, the control circuit 140 can control the power supply circuit 120 to open the first switch S1 and close the second switch S2, so that the boost circuit 122 is electrically connected to the first functional circuit 110, so as to use the boost voltage PVDD provided by the boost circuit 122 to power the first functional circuit 110. Figure 2 Compared with the embodiment shown in Figure 6 In the illustrated embodiment, the boost circuit 122 is not required to work in the direct-on state, so there are fewer restrictions on the boost circuit 122, and more boost circuits can be selected to be applicable to the embodiment.

[0046] Figure 7 FIG. 1 is a block diagram of a circuit device 100A according to another embodiment of the present invention. Figure 1 Compared with the circuit device 100 shown in FIG. 1 , the circuit device 100A further includes a second voltage detection circuit 132 for detecting the power supply voltage. Other identical or similar elements are denoted by the same reference numerals, and repeated description thereof is omitted here. The second voltage detection circuit 132 may have a circuit similar to the first voltage detection circuit 130, and is also used to detect the power supply voltage V BAT , the only difference is that the power supply voltage V BAT This is described in detail below in comparison with different thresholds.

[0047] Specifically, when the second voltage detection circuit 132 detects the power supply voltage V BAT When the second voltage detection circuit 132 detects the power supply voltage V BATWhen it is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit 140. Similar to the aforementioned first detection signal and the second detection signal, the third detection signal and the fourth detection signal may correspond to a high (or low) level signal and a low (or high) level signal outputted from the same port and transmitted on the same signal line, respectively. In this embodiment, the second threshold voltage may be lower than the aforementioned first threshold voltage. For example, as mentioned above, the first threshold voltage is the threshold voltage before the power supply, such as a battery, reaches the discharge cut-off state, but its voltage drops to a level that is insufficient to directly power the first functional circuit 110 during the discharge process. Here, the second threshold voltage may be a threshold voltage for determining that the battery has reached or is close to the discharge cut-off state, at which point the battery cannot continue to supply power, that is, the battery is exhausted, and a shutdown operation needs to be performed.

[0048] In response to the third detection signal, the control circuit 140 may enable the power supply circuit 120 to supply power to the first functional circuit 110. It should be understood that when the power supply circuit 120 is enabled, as described above, the control circuit 140 may control the power supply circuit 120 according to the first detection signal and the second detection signal to provide the power supply voltage V BAT Alternatively, the boost voltage PVDD supplies power to the first functional circuit 110. In response to the fourth detection signal, the control circuit 140 may disable the power supply circuit 120, that is, perform a shutdown operation, thereby stopping supplying power to the first functional circuit 110.

[0049] Figure 8 FIG. 1 is a block diagram of a circuit device 100B according to another embodiment of the present invention. Figure 7 Compared with the circuit arrangement 100A shown in the figure, the circuit arrangement 100B further includes a second functional circuit 112. BAT Different from the first functional circuit 110, the second functional circuit 112 needs a power supply voltage higher than V BAT A functional circuit powered by a higher boost voltage PVDD, examples of such circuits include, but are not limited to, the output stage of an audio amplifier circuit, a power amplifier circuit with a higher output power, etc. In order to maintain the normal operation of the second functional circuit 112, it is necessary to always use the boost voltage PVDD to power the second functional circuit 112. Therefore, in the circuit device 100B, when the control circuit 140 enables the power supply circuit 120, the power supply circuit 120 provides the boost voltage PVDD to power the second functional circuit 112; when the control circuit 140 disables the power supply circuit 120, the power supply circuit 120 stops supplying power to the second functional circuit 112.

[0050] Fig. 91 is a block diagram of a circuit device 100B according to an embodiment of the present invention, which shows a circuit structure of a power supply circuit 120 for supplying power to a first functional circuit 110 and a second functional circuit 112. Fig. 9 As shown, the power supply circuit 120 includes a first boost circuit 122 and a second boost circuit 126, wherein the first boost circuit 122 can provide a power supply voltage V BAT Alternatively, the first boost voltage PVDD1 may be used to power the first functional circuit 110 , and the second boost circuit 126 may provide the second boost voltage PVDD2 to power the second functional circuit 112 . The first boost voltage PVDD1 and the second boost voltage PVDD2 may be the same as or different from each other.

[0051] As mentioned above, when the second voltage detection circuit 132 detects the power supply voltage V BAT When the power supply voltage V is higher than or equal to the second threshold voltage, the third detection signal is sent to the control circuit 140. In response to the third detection signal, the control circuit 140 can enable the power supply circuit 120, so that the first boost circuit 122 and the second boost circuit 126 can respectively supply power to the first functional circuit 110 and the second functional circuit 112. BAT When the voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit 140. In response to the fourth detection signal, the control circuit 140 may disable the power supply circuit 120, thereby stopping power supply to the first functional circuit 110 and the second functional circuit 112.

[0052] Moreover, as mentioned above, when the first voltage detection circuit 130 detects the power supply voltage V BAT When the voltage V is higher than or equal to the first threshold voltage, the first detection signal is sent to the control circuit 140. Since the first threshold voltage is higher than the second threshold voltage, the power supply circuit 120 is in an enabled state at this time. In response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to make the first boost circuit 122 work in the pass-through mode to directly provide the power supply voltage V BAT The first functional circuit 110 is powered. When the first voltage detection circuit 130 detects the power supply voltage V BAT When the power supply voltage V is lower than the first threshold voltage, the second detection signal is sent to the control circuit 140. If the power supply circuit 120 is in the enabled state, then in response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to make the first boost circuit 122 work in the boost mode to provide the first boost voltage PVDD1 to power the first functional circuit 110. In short, when the power supply voltage V BAT When the power supply voltage V BATis higher than or equal to the first threshold voltage, the first boost circuit 122 operates in a direct-through mode and directly provides a power supply voltage V BAT Provide power to the first functional circuit 110; if the power supply voltage V BAT If the power supply voltage V BAT When the voltage is lower than the second threshold voltage, the power supply circuit 120 is disabled, and both the first boost circuit 122 and the second boost circuit 126 stop supplying power to the first functional circuit 110 and the second functional circuit 112 .

[0053] Fig.10 1 is a block diagram of a circuit device 100B according to an embodiment of the present invention, which shows a circuit structure of a power supply circuit 120 for supplying power to a first functional circuit 110 and a second functional circuit 112. Fig.10 As shown, the power supply circuit 120 includes a circuit for receiving a power supply voltage V BAT The first power interface 121 and the second power interface 123 for receiving the boost voltage PVDD, the first power interface 121 is electrically connected to the first functional circuit 110 through the first switch S1, the second power interface 123 is electrically connected to the first functional circuit 110 through the second switch S2, and is electrically connected to the second functional circuit 112 through the third switch S3. That is, the power supply circuit 120 can use the received boost voltage PVDD to power both the first functional circuit 110 and the second functional circuit 120. Since the boost voltages required by the first functional circuit 110 and the second functional circuit 120 may be different from each other, a voltage divider circuit 125 can also be provided between the second power interface 123 and the first and second functional circuits 110 and 120 to provide an appropriate boost voltage to power the first functional circuit 110 and the second functional circuit 120.

[0054] As mentioned above, when the second voltage detection circuit 132 detects the power supply voltage V BAT When the voltage V is higher than or equal to the second threshold voltage, a third detection signal is sent to the control circuit 140. In response to the third detection signal, the control circuit 140 can enable the power supply circuit 120, thereby closing one of the first switch S1 and the second switch S2 (depending on the detection result of the first voltage detection circuit 130, which will be described in detail below) to use the power supply voltage V BATAlternatively, the boost voltage PVDD is used to power the first functional circuit 110, and the third switch S3 is closed to use the boost voltage PVDD to power the second functional circuit 112. BAT When the voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit 140. In response to the fourth detection signal, the control circuit 140 can disable the power supply circuit 120, that is, disconnect the first switch S1, the second switch S2 and the third switch S3, thereby stopping power supply to the first functional circuit 110 and the second functional circuit 112.

[0055] Moreover, as mentioned above, when the first voltage detection circuit 130 detects the power supply voltage V BAT When the voltage V is higher than or equal to the first threshold voltage, the first detection signal is sent to the control circuit 140. Since the first threshold voltage is higher than the second threshold voltage, the power supply circuit 120 is in the enabled state at this time. In response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to close the first switch S1 and open the second switch S2 to directly use the power supply voltage V BAT The first functional circuit 110 is powered. When the first voltage detection circuit 130 detects the power supply voltage V BAT When the power supply voltage V is lower than the first threshold voltage, the second detection signal is sent to the control circuit 140. If the power supply circuit 120 is in the enabled state, then in response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to open the first switch S1 and close the second switch S2 to use the boost voltage PVDD to power the first functional circuit 110. In short, when the power supply voltage V BAT When the power supply voltage V BAT is higher than or equal to the first threshold voltage, then the power supply voltage V is directly provided BAT Provide power to the first functional circuit 110; if the power supply voltage V BAT is lower than the first threshold voltage (but higher than or equal to the second threshold voltage), the boost voltage PVDD is provided to power the first functional circuit 110; regardless of the power supply voltage V BAT Whether the power supply voltage V is higher or lower than the first threshold voltage, as long as the power supply circuit 120 is enabled, the power supply circuit 120 provides the boost voltage PVDD to power the second functional circuit 112. BAT When the voltage is lower than the second threshold voltage, the power supply circuit 120 is disabled. At this time, the first, second and third switches S1 , S2 and S3 may be disconnected to stop supplying power to the first functional circuit 110 and the second functional circuit 112 .

[0056] Fig.111 is a block diagram of a circuit device 100B according to an embodiment of the present invention, which shows a circuit structure of a power supply circuit 120 for supplying power to a first functional circuit 110 and a second functional circuit 112. Fig.11 As shown, the power supply circuit 120 includes a boost circuit 122 and a bypass path 124 connected in parallel with the boost circuit 122, the bypass path 124 is electrically connected to the first functional circuit 110 through a first switch S1, the boost circuit 122 is electrically connected to the first functional circuit 110 through a second switch S2, and is electrically connected to the second functional circuit 112 through a third switch S3. That is, the boost circuit 122 can provide a boost voltage PVDD to power both the first functional circuit 110 and the second functional circuit 120. Since the boost voltages required by the first functional circuit 110 and the second functional circuit 120 may be different from each other, a voltage divider circuit 125 may be further provided between the boost circuit 122 and the first and second functional circuits 110 and 120 to provide an appropriate boost voltage to power the first functional circuit 110 and the second functional circuit 120.

[0057] As mentioned above, when the second voltage detection circuit 132 detects the power supply voltage V BAT When the voltage V is higher than or equal to the second threshold voltage, a third detection signal is sent to the control circuit 140. In response to the third detection signal, the control circuit 140 can enable the power supply circuit 120, thereby closing one of the first switch S1 and the second switch S2 (depending on the detection result of the first voltage detection circuit 130, which will be described in detail below) to use the power supply voltage V BAT Alternatively, the boost voltage PVDD is used to power the first functional circuit 110, and the third switch S3 is closed to use the boost voltage PVDD to power the second functional circuit 112. BAT When the voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit 140. In response to the fourth detection signal, the control circuit 140 can disable the power supply circuit 120, that is, disconnect the first switch S1, the second switch S2 and the third switch S3, thereby stopping power supply to the first functional circuit 110 and the second functional circuit 112.

[0058] Moreover, as mentioned above, when the first voltage detection circuit 130 detects the power supply voltage V BAT When the voltage V is higher than or equal to the first threshold voltage, the first detection signal is sent to the control circuit 140. Since the first threshold voltage is higher than the second threshold voltage, the power supply circuit 120 is in the enabled state at this time. In response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to close the first switch S1 and open the second switch S2 to directly use the power supply voltage V BAT The first functional circuit 110 is powered. When the first voltage detection circuit 130 detects the power supply voltage VBAT When the power supply voltage V is lower than the first threshold voltage, the second detection signal is sent to the control circuit 140. If the power supply circuit 120 is in the enabled state, then in response to the first detection signal, the control circuit 140 can control the power supply circuit 120 to open the first switch S1 and close the second switch S2 to use the boost voltage PVDD to power the first functional circuit 110. In short, when the power supply voltage V BAT When the power supply voltage V BAT is higher than or equal to the first threshold voltage, then the power supply voltage V is directly provided BAT Provide power to the first functional circuit 110; if the power supply voltage V BAT is lower than the first threshold voltage (but higher than or equal to the second threshold voltage), the boost voltage PVDD is provided to power the first functional circuit 110; regardless of the power supply voltage V BAT Whether the power supply voltage V is higher or lower than the first threshold voltage, as long as the power supply circuit 120 is enabled, the power supply circuit 120 provides the boost voltage PVDD to power the second functional circuit 112. BAT When the voltage is lower than the second threshold voltage, the power supply circuit 120 is disabled. At this time, the first, second and third switches S1 , S2 and S3 may be disconnected to stop supplying power to the first functional circuit 110 and the second functional circuit 112 .

[0059] and Fig. 9 Compared to the embodiment shown, Fig.11 The illustrated embodiment can use the same boost circuit to power the first functional circuit 110 and the second functional circuit 112 , thereby reducing the number of required boost circuits, thereby simplifying the circuit structure and further saving costs.

[0060] The following will describe a power supply method for a circuit device according to some embodiments of the present utility model. Figure 1-11 When describing the embodiments of the circuit arrangements, the power supply methods implemented in these circuit arrangements have been described, so the embodiments of the power supply methods will be briefly described below to avoid a lengthy and redundant description.

[0061] Fig.12 FIG. 2 is a flow chart of a power supply method 200 for a circuit device according to an embodiment of the present invention. Fig.12 As shown, the power supply method 200 may include, at step 210, detecting a power supply voltage V BAT , and in step 212, it is determined that the power supply voltage V BAT Is it higher than or equal to the first threshold voltage? If the power supply voltage V BAT is higher than or equal to the first threshold voltage, then in step 214, the power supply voltage V BATThe first functional circuit in the circuit device is powered. If the power supply voltage V BAT is lower than the first threshold voltage, then in step 2164, a voltage higher than the power supply voltage V BAT The higher boost voltage PVDD powers the first functional circuit.

[0062] In some embodiments, the circuit device may include a circuit for BAT A boost circuit for boosting voltage to output a boosted voltage, such as the one mentioned above Figure 2 The power supply method 200 may include: when the power supply voltage V BAT When the voltage is higher than or equal to the first threshold voltage, the boost circuit is controlled to operate in a pass-through mode to provide a power supply voltage V BAT Provide power to the first functional circuit; when the power supply voltage V BAT When the voltage is lower than the first threshold voltage, the boost circuit is controlled to operate in a boost mode to provide a boost voltage to power the first functional circuit.

[0063] In some embodiments, the circuit device may include a circuit for receiving a power supply voltage V BAT A first power interface and a second power interface for receiving a boosted voltage, such as the one described above with reference to Figure 5 The power supply method 200 may include: when the power supply voltage V BAT When the voltage is higher than or equal to the first threshold voltage, the power supply voltage V received on the first power supply interface is used. BAT Provide power to the first functional circuit; when the power supply voltage V BAT When the voltage is lower than the first threshold voltage, the boost voltage received on the second power interface is used to power the first functional circuit.

[0064] In some embodiments, the circuit device may include a boost circuit and a bypass path connected in parallel with the boost circuit, wherein the input terminals of the boost circuit and the bypass path are configured to receive a power supply voltage V BAT , for example, refer to Figure 6 The power supply method 200 may include: when the power supply voltage V BAT When the voltage is higher than or equal to the first threshold voltage, the bypass path is electrically connected to the first functional circuit, and the electrical connection between the boost circuit and the first functional circuit is disconnected, so that the power supply voltage V BAT Provide power to the first functional circuit; when the power supply voltage V BAT When the voltage is lower than the first threshold voltage, the boost circuit is electrically connected to the first functional circuit, and the electrical connection between the bypass path and the first functional circuit is disconnected, so that the boost voltage output by the boost circuit is used to power the first functional circuit.

[0065] Fig.13 Another embodiment of the power supply method 200 is shown. Fig.13The steps shown can be found in Fig.12 Step 210 is then performed. Fig.13 As shown, in step 218, the detected power supply voltage V BAT Is it higher than or equal to a second threshold voltage, where the second threshold voltage is lower than the aforementioned first threshold voltage. BAT If the voltage is higher than or equal to the second threshold voltage, the first functional circuit can be powered in step 220, as described above. Fig.12 As described, if the power supply voltage V BAT is higher than or equal to the first threshold voltage, then the power supply voltage V BAT To power the first functional circuit, if the power supply voltage V BAT is lower than the first threshold voltage, then use a voltage higher than the power supply voltage V BAT The higher boost voltage PVDD powers the first functional circuit. BAT If the voltage is lower than the second threshold voltage, then in step 222, power supply to the first functional circuit is stopped.

[0066] In addition, if the power supply voltage V BAT is higher than or equal to the second threshold voltage, then in step 224, a voltage higher than the power supply voltage V BAT The higher boost voltage powers the second functional circuit. If the power supply voltage V BAT If the voltage is lower than the second threshold voltage, the power supply to the second functional circuit may be stopped in step 226. It should be understood that the steps in method 200 may be performed in a different order than described, for example, steps 220 and 224 may be performed simultaneously, and steps 222 and 226 may be performed simultaneously.

[0067] In some embodiments, the circuit device may include a first boost circuit for powering a first functional circuit and a second boost circuit for powering a second functional circuit, as described above with reference to Fig. 9 The power supply method 200 may include: when the power supply voltage V BAT When the power supply voltage V BAT When the voltage is lower than the second threshold voltage, the boosted voltage provided by the second boost circuit is stopped from being used to supply power to the second functional circuit.

[0068] In some embodiments, the circuit device may include a circuit for receiving a power supply voltage V BAT A first power interface and a second power interface for receiving a boosted voltage, such as the one described above with reference to Fig.10 The power supply method 200 may include: when the power supply voltage V BATWhen the voltage is higher than or equal to the second threshold voltage, the boost voltage received on the second power interface is used to power the second functional circuit; when the power voltage is lower than the second threshold voltage, the boost voltage received on the second power interface is stopped from being used to power the second functional circuit.

[0069] In some embodiments, the circuit arrangement may include a boost circuit and a bypass path connected in parallel with the boost circuit, such as described above with reference to Fig.11 The power supply method 200 may include: when the power supply voltage V BAT When the power supply voltage V BAT When the voltage is lower than the second threshold voltage, the boost circuit is stopped from being used to supply power to the second functional circuit.

[0070] Fig.14 An electronic device 300 according to an exemplary embodiment of the present utility model is shown, which may include a circuit device 310, wherein the circuit device 310 may be a circuit device according to any of the above embodiments. In some embodiments, the electronic device 300 may be a battery-powered portable electronic device, such as a mobile phone, a tablet computer, a notebook computer, a wearable electronic device, etc.

[0071] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0072] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0073] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0074] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0075] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A circuit device, characterized in that: include: a first functional circuit; a power supply circuit for supplying power to the first functional circuit; A first voltage detection circuit for detecting a power supply voltage; as well as Control circuit, When the first voltage detection circuit detects that the power supply voltage is higher than or equal to the first threshold voltage, a first detection signal is sent to the control circuit. In response to the first detection signal, the control circuit controls the power supply circuit so that the power supply circuit provides the power supply voltage to power the first functional circuit. When the first voltage detection circuit detects that the power supply voltage is lower than the first threshold voltage, a second detection signal is sent to the control circuit. In response to the second detection signal, the control circuit controls the power supply circuit so that the power supply circuit provides a boost voltage higher than the power supply voltage to power the first functional circuit.

2. The circuit arrangement according to claim 1, characterized in that The power supply circuit includes a boost circuit, the boost circuit receives the power supply voltage, In response to the first detection signal, the control circuit controls the boost circuit to operate in a pass-through mode to provide the power supply voltage to power the first functional circuit. In response to the second detection signal, the control circuit controls the boost circuit to operate in a boost mode to provide the boost voltage to power the first functional circuit.

3. The circuit arrangement according to claim 1, characterized in that The power supply circuit comprises: A first power supply interface for receiving the power supply voltage; and a second power supply interface for receiving the boosted voltage, Wherein, in response to the first detection signal, the control circuit controls the power supply circuit to provide the power supply voltage received on the first power interface to the first functional circuit, In response to the second detection signal, the control circuit controls the power supply circuit to provide the boosted voltage received on the second power interface to the first functional circuit.

4. The circuit device according to claim 1, characterized in that The power supply circuit includes a boost circuit and a bypass path connected in parallel with the boost circuit, wherein input ends of the boost circuit and the bypass path are used to receive the power supply voltage. In response to the first detection signal, the control circuit controls the power supply circuit so that the bypass path is electrically connected to the first functional circuit and the electrical connection between the boost circuit and the first functional circuit is disconnected, thereby using the power supply voltage to power the first functional circuit. In response to the second detection signal, the control circuit controls the power supply circuit so that the boost circuit is electrically connected to the first functional circuit and the electrical connection between the bypass path and the first functional circuit is disconnected, thereby using the boost voltage output by the boost circuit to power the first functional circuit.

5. The circuit arrangement according to any one of claims 1 to 4, characterized in that Also includes: a second voltage detection circuit for detecting the power supply voltage, When the second voltage detection circuit detects that the power supply voltage is higher than or equal to a second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit to supply power to the first functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit to stop supplying power to the first functional circuit.

6. The circuit arrangement according to claim 5, characterized in that Also includes: a second functional circuit, wherein when the control circuit enables the power supply circuit, the power supply circuit provides a boosted voltage to supply power to the second functional circuit, and when the control circuit disables the power supply circuit, the power supply circuit stops supplying power to the second functional circuit.

7. The circuit arrangement according to claim 2, characterized in that The boost circuit is a first boost circuit, the power supply circuit further includes a second boost circuit, and the circuit device further includes a second functional circuit and a second voltage detection circuit for detecting the power supply voltage, When the second voltage detection circuit detects that the power supply voltage is higher than or equal to the second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby using the boosted voltage provided by the second boost circuit to power the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping power supply to the second functional circuit.

8. The circuit arrangement according to claim 3, characterized in that Also includes: A second functional circuit; as well as a second voltage detection circuit for detecting the power supply voltage, Wherein, when the second voltage detection circuit detects that the power supply voltage is higher than or equal to the second threshold voltage, a third detection signal is sent to the control circuit, and the second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby providing the boost voltage received on the second power interface to the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping power supply to the second functional circuit.

9. The circuit arrangement according to claim 4, characterized in that Also includes: A second functional circuit; as well as a second voltage detection circuit for detecting the power supply voltage, When the second voltage detection circuit detects that the power supply voltage is higher than or equal to the second threshold voltage, a third detection signal is sent to the control circuit. The second threshold voltage is lower than the first threshold voltage. In response to the third detection signal, the control circuit enables the power supply circuit, thereby using the boosted voltage provided by the boost circuit to power the second functional circuit. When the second voltage detection circuit detects that the power supply voltage is lower than the second threshold voltage, a fourth detection signal is sent to the control circuit. In response to the fourth detection signal, the control circuit disables the power supply circuit, thereby stopping power supply to the second functional circuit.

10. An electronic device, characterized in that: A circuit arrangement comprising any one of claims 1 to 9.

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