Charge pump circuit and electronic equipment
Through the combination of switching tube array, capacitor and resistor, the voltage output is controlled by the control unit, which solves the problems of increased complexity and cost of the charge pump circuit, and achieves the effect of reducing costs and area.
Patent Information
- Application Number
- CN202422026216.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The increase in the step-down ratio of existing charge pump circuits leads to an increase in the complexity and cost of the circuit, and an increase in area.
Using a combination of switching tube array, capacitor and resistor, the capacitor is switched by controlling the on-off state of the switching tube, and the voltage output is controlled by using the control unit to reduce the number of components to achieve a 4:1 ratio of step-down output.
The manufacturing cost and area of the charge pump circuit is reduced while maintaining a large step-down ratio.
Smart Images
Figure CN223194610U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of circuit technologies, and in particular, to a charge pump circuit and an electronic device. Background Art
[0002] A charge pump circuit is a commonly used DC-DC converter in the charging process of an electronic device, mainly used for step-down charging. Different charge pump circuits have different step-down ratios. In related technologies, as the step-down ratio of the charge pump circuit increases, the complexity of the charge pump circuit topology will also increase significantly. This will lead to a significant increase in the manufacturing cost of the charge pump circuit and a significant increase in the area of the circuit. Utility Model Content
[0003] To overcome the problems existing in the related technologies, the present disclosure provides a charge pump circuit.
[0004] According to the first aspect of the embodiments of the present disclosure, a charge pump circuit is provided, including:
[0005] A switch tube array including a plurality of switch tubes; [[ID=ZI]]
[0006] A capacitor connected to the switch tube array. By switching the on-off states of at least some of the plurality of switch tubes, the first end of the capacitor can be switched between being connected to the voltage input end of the charge pump circuit, being connected to the voltage output end of the charge pump circuit, and being open-circuited from both the voltage input end and the voltage output end, and the second end of the capacitor can be switched between being connected to the voltage output end and being grounded;
[0007] A resistor connected in parallel with the capacitor through a discharge switch tube;
[0008] A control unit for controlling the on-off states of the plurality of switch tubes in the switch tube array and the discharge switch tube to control the voltage output from the voltage output end.
[0009] In some embodiments, the plurality of switch tubes are respectively a first switch tube, a second switch tube, a third switch tube, and a fourth switch tube;
[0010] The first end of the capacitor is connected to the voltage input end through the first switch tube and connected to the voltage output end through the second switch tube;
[0011] The second end of the capacitor is connected to the voltage output end through the third switch tube and grounded through the fourth switch tube.
[0012] In some embodiments, when the voltage across the capacitor is a first preset value, the first switch tube and the third switch tube are in an on state, and the second switch tube, the fourth switch tube, and the discharge switch tube are in an off state;
[0013] Wherein, the first preset value is three - quarters of the input voltage of the voltage input terminal.
[0014] In some embodiments, during the process that the voltage across the capacitor drops from the first preset value to the second preset value, the fourth switching transistor and the discharge switching transistor are in the conducting state, and the first switching transistor, the second switching transistor, and the third switching transistor are in the cut - off state;
[0015] Wherein, the first preset value is three - quarters of the input voltage of the voltage input terminal, and the second preset value is one - quarter of the input voltage of the voltage input terminal.
[0016] In some embodiments, when the voltage across the capacitor is the second preset value, the second switching transistor and the fourth switching transistor are in the conducting state, and the first switching transistor, the third switching transistor, and the discharge switching transistor are in the cut - off state;
[0017] Wherein, the second preset value is one - quarter of the input voltage of the voltage input terminal.
[0018] In some embodiments, during the process that the voltage across the capacitor rises from the second preset value to the first preset value, the first switching transistor and the fourth switching transistor are in the conducting state, and the second switching transistor, the third switching transistor, and the discharge switching transistor are in the cut - off state;
[0019] Wherein, the first preset value is three - quarters of the input voltage of the voltage input terminal, and the second preset value is one - quarter of the input voltage of the voltage input terminal.
[0020] In some embodiments, the charge pump circuit further includes a detection unit, which is respectively connected to both ends of the capacitor and the control unit, and is used for detecting the voltage across the capacitor, so that the control unit can determine the working state of the charge pump circuit according to the voltage across the capacitor.
[0021] In some embodiments, the detection unit includes: a differential amplifier, a first window comparator, and a second window comparator;
[0022] The first input terminal of the differential amplifier is connected to the first end of the capacitor, and the second input terminal of the differential amplifier is connected to the second end of the capacitor;
[0023] The output terminal of the differential amplifier is respectively connected to the input terminal of the first window comparator and the input terminal of the second window comparator;
[0024] The output terminal of the first window comparator is connected to the first input terminal of the control unit, and the output terminal of the second window comparator is connected to the second input terminal of the control unit;
[0025] The enable terminal of the first window comparator is connected to the first output terminal of the control unit, and the enable terminal of the second window comparator is connected to the second output terminal of the control unit;
[0026] The control unit is further configured to determine the operating state of the charge pump circuit according to the signal output by the first window comparator or the second window comparator.
[0027] In some embodiments, each of the plurality of switching transistors is a field effect transistor or a bipolar transistor, and the discharge switching transistor is a field effect transistor or a bipolar transistor.
[0028] According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device including the charge pump circuit as described in the first aspect.
[0029] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:
[0030] The charge pump circuit provided by the embodiments of the present disclosure includes a switching transistor array, a capacitor, a resistor, and a control unit. Among them, the switching transistor array includes a plurality of switching transistors. The capacitor is connected to the switching transistor array. By switching the on / off states of at least some of the plurality of switching transistors, the first end of the capacitor can be switched between being connected to the voltage input terminal of the charge pump circuit, being connected to the voltage output terminal of the charge pump circuit, and being open-circuited with both the voltage input terminal and the voltage output terminal, and the second end of the capacitor can be switched between being connected to the voltage output terminal and being grounded. The resistor can be connected in parallel with the capacitor through the discharge switching transistor. The control unit is configured to control the on / off states of the plurality of switching transistors and the discharge switching transistor in the switching transistor array so as to control the voltage output at the voltage output terminal. The embodiments of the present disclosure can form a charge pump circuit with fewer components, thereby reducing the manufacturing cost of the circuit and reducing the area of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 FIG. shows a schematic architecture diagram of a charge pump circuit in an embodiment of the present disclosure.
[0032] Figure 2 FIG. shows a schematic circuit diagram of a charge pump circuit in an embodiment of the present disclosure.
[0033] Figure 3 FIG. shows a schematic diagram of the voltage change across the capacitor in an embodiment of the present disclosure.
[0034] Figure 4 FIG. shows a schematic circuit diagram of a charge pump circuit with a detection unit in an embodiment of the present disclosure.
[0035] Reference numerals:
[0036] 100 - Switch tube array; 101 - First switch tube; 102 - Second switch tube; 103 - Third switch tube; 104 - Fourth switch tube; 200 - Capacitor; 300 - Resistor; 301 - Discharge switch tube; 400 - Control unit; 501 - Voltage input terminal; 502 - Voltage output terminal; 600 - Detection unit; 601 - Differential amplifier; 602 - First window comparator; 603 - Second window comparator. Detailed implementation manners
[0037] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0038] In addition, the terms "first", "second", etc. used in the present disclosure are only for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0039] Figure 1 Shows a schematic architecture diagram of a charge pump circuit in an embodiment of the present disclosure, as Figure 1 shown, the charge pump circuit includes: a switch tube array 100, a capacitor 200, a resistor 300, and a control unit 400.
[0040] In some embodiments, the switch tube array 100 includes multiple switch tubes. The capacitor 200 is connected to the switch tube array 100. By switching the on / off states of at least some of the multiple switch tubes included in the switch tube array 100, the first end of the capacitor 200 can be switched between being connected to the voltage input terminal 501 of the charge pump circuit, being connected to the voltage output terminal 502 of the charge pump circuit, and being open-circuited with both the voltage input terminal 501 and the voltage output terminal 502, and the second end of the capacitor 200 can be switched between being connected to the voltage output terminal 502 and being grounded.
[0041] Exemplarily, there is at least one switch tube between the first end of the capacitor 200 and the voltage input terminal 501, and there is at least one switch tube between the first end of the capacitor 200 and the voltage output terminal 502. And there is also at least one switch tube between the second end of the capacitor 200 and the voltage output terminal 502, and there is at least one switch tube between the second end of the capacitor 200 and the ground wire. Thus, by controlling the on and off of these switch tubes, the switching of the connection relationship at both ends of the capacitor 200 can be achieved.
[0042] In some embodiments, the resistor 300 can be connected in parallel with the capacitor 200 through the discharge switch transistor 301. When the discharge switch transistor 301 is in the conducting state, the first end of the resistor 300 is connected to the first end of the capacitor 200, and the second end of the resistor 300 is connected to the second end of the capacitor 200, so that the capacitor 200 can be quickly discharged under the action of the parallel-connected resistor 300.
[0043] In some embodiments, the control unit 400 is configured to control the on / off states of the multiple switch transistors in the switch transistor array 100 and the discharge switch transistor 301, so as to control the voltage output at the voltage output terminal 502.
[0044] Exemplarily, the control unit 400 can connect its multiple output terminals to the control terminals of the multiple switch transistors in the switch transistor array 100 and the discharge switch transistor 301 respectively, so that the control unit 400 can independently control the multiple switch transistors in the switch transistor array 100 and the discharge switch transistor 301, thereby achieving step-down output of the input voltage at the voltage input terminal 501 to implement the function of a step-down charge pump.
[0045] In some embodiments, Figure 2 The circuit schematic diagram of a charge pump circuit in an embodiment of the present disclosure is shown, as Figure 2 shown, the multiple switch transistors included in the switch transistor array 100 are respectively a first switch transistor 101, a second switch transistor 102, a third switch transistor 103, and a fourth switch transistor 104.
[0046] The first end of the capacitor 200 is connected to the voltage input terminal 501 through the first switch transistor 101 and is connected to the voltage output terminal 502 through the second switch transistor 102. When the first switch transistor 101 is conducting and the second switch transistor 102 is cutoff, the first end of the capacitor 200 is connected to the voltage input terminal 501. When the first switch transistor 101 is cutoff and the second switch transistor 102 is conducting, the first end of the capacitor 200 is connected to the voltage output terminal 502. And when both the first switch transistor 101 and the second switch transistor 102 are cutoff, the first end of the capacitor 200 is open-circuited with both the voltage input terminal 501 and the voltage output terminal 502. At this time, the capacitor 200 cannot be charged through the voltage output at the voltage input terminal 501, nor can it discharge outward through the voltage output terminal 502.
[0047] The second end of the capacitor 200 is connected to the voltage output terminal 502 through the third switch transistor 103 and is grounded through the fourth switch transistor 104. When the third switch transistor 103 is conducting and the fourth switch transistor 104 is cutoff, the second end of the capacitor 200 is connected to the voltage output terminal 502. When the third switch transistor 103 is cutoff and the fourth switch transistor104 is conducting, the second end of the capacitor 200 is grounded.
[0048] Please continue to refer toFigure 2 In some embodiments, the first end of the resistor 300 can be connected to the first end of the capacitor 200 through the discharge switch tube 301, and the second end of the resistor 300 can be connected between the fourth switch tube 104 and the ground wire. That is to say, when both the discharge switch tube 301 and the fourth switch tube 104 are turned on, both ends of the capacitor 200 can be conducted through the resistor 300, so that the capacitor 200 can discharge quickly.
[0049] In some embodiments, the charge pump circuit provided by the present disclosure can achieve a step-down output with a 4:1 ratio.
[0050] In this embodiment, when the voltage across the capacitor 200 is the first preset value, the first switch tube 101 and the third switch tube 103 can be turned on, and the second switch tube 102, the fourth switch tube 104, and the discharge switch tube 301 can be turned off. Among them, the first preset value is three-quarters of the input voltage of the voltage input terminal 501.
[0051] In this state, the first end of the capacitor 200 is connected to the voltage input terminal 501, and the second end of the capacitor 200 is connected to the voltage output terminal 502. Since the voltage across the capacitor 200 has been charged to three-quarters of the input voltage, a voltage drop of three-quarters of the input voltage can be provided, so that the voltage output by the voltage output terminal 502 is one-quarter of the input voltage of the voltage input terminal 501.
[0052] During the process of the voltage across the capacitor 200 decreasing from the first preset value to the second preset value, the fourth switch tube 104 and the discharge switch tube 301 can be turned on, and the first switch tube 101, the second switch tube 102, and the third switch tube 103 can be turned off. Among them, the second preset value is one-quarter of the input voltage of the voltage input terminal 501.
[0053] Since the capacitor 200 is equivalent to an open circuit after being fully charged. Therefore, in order to keep the capacitor 200 always in a conducting state, the capacitor 200 needs to be always in a charging or discharging state. In this state, the first end of the capacitor 200 is open to both the voltage input terminal 501 and the voltage output terminal 502, the second end of the capacitor 200 is grounded, and the first end and the second end of the capacitor 200 are connected through the resistor 300, so that the voltage across the capacitor 200 can be quickly discharged to the second preset value. In this state, the charge pump circuit does not output voltage externally.
[0054] When the voltage across the capacitor 200 is the second preset value, the second switch tube 102 and the fourth switch tube 104 can be turned on, and the first switch tube 101, the third switch tube 103, and the discharge switch tube 301 can be turned off.
[0055] In this state, the first terminal of capacitor 200 is connected to voltage output terminal 502, and the second terminal of capacitor 200 is grounded. Capacitor 200 is still in a discharged state. However, since the voltage across capacitor 200 has been discharged to a second predetermined value, which is exactly one-quarter of the input voltage, the discharged capacitor 200 can independently output a voltage to voltage output terminal 502, allowing the charge pump circuit to still output a 4:1 step-down voltage.
[0056] When the voltage across the capacitor 200 increases from the second preset value to the first preset value, the first switch tube 101 and the fourth switch tube 104 are turned on, and the second switch tube 102, the third switch tube 103 and the discharge switch tube 301 are turned off.
[0057] In this state, the first terminal of capacitor 200 is connected to voltage input terminal 501, and the second terminal of capacitor 200 is grounded. Capacitor 200 is in a charging state until the voltage across capacitor 200 is charged to a first preset value, and then the state where the voltage across capacitor 200 is the first preset value is returned to the state described above.
[0058] Exemplarily, the control unit 400 has at least five output terminals (for simplicity, Figure 2 Each output terminal is connected to the control terminal of one of the first switching transistor 101, the second switching transistor 102, the third switching transistor 103, the fourth switching transistor 104, and the discharge switching transistor 301. Thus, the control unit 400 can control the on and off states of the first switching transistor 101, the second switching transistor 102, the third switching transistor 103, the fourth switching transistor 104, and the discharge switching transistor 301 according to a preset cycle, causing the charge pump circuit to cycle between the four operating states, achieving a 4:1 step-down output.
[0059] For example, when the input voltage is 20V and the output voltage is 5V, the voltages across the capacitor 200 in the above four working states are as follows: Figure 3 In this example, in order for the charge pump circuit to achieve a 4:1 ratio step-down output, the first preset value is 15V and the second preset value is 5V.
[0060] Please continue to refer to Figure 2 In some embodiments, each switch in the switch array 100 is a field effect transistor or a triode ( Figure 2 are all field effect tubes), and the discharge switch tube 301 is also a field effect tube or a triode ( Figure 2 Wherein, each switch tube in the switch tube array 100 and the discharge switch tube 301 are also respectively connected to a diode ( Figure 2D1 to D5 are connected in parallel, thereby improving the stability of the switching transistor operation to ensure the normal operation of the charge pump circuit.
[0061] Thus, the solution provided by the embodiments of the present disclosure can form a charge pump circuit with a large voltage reduction ratio using fewer components, thereby reducing the manufacturing cost of the circuit and reducing the area of the circuit.
[0062] In some embodiments, the charge pump circuit further includes a detection unit. The detection unit is respectively connected to both ends of the capacitor 200 and the control unit 400, and is used to detect the voltage across the capacitor 200, so that the control unit 400 can determine the working state of the charge pump circuit according to the voltage across the capacitor 200. Figure 3 It can be seen that the voltage across the capacitor 200 is closely related to the working state of the charge pump circuit. By detecting the voltage across the capacitor 200, it can be determined whether the working state of the charge pump circuit is normal.
[0063] Please refer to Figure 4 , Figure 4 which shows a circuit schematic diagram of a charge pump circuit with a detection unit. Figure 4 It is different from Figure 2 in that Figure 4 on the basis of Figure 2 a detection unit 600 is added, and the repeated parts will not be described again.
[0064] Exemplarily, as Figure 4 shown, the detection unit 600 includes: a differential amplifier 601, a first window comparator 602, and a second window comparator 603.
[0065] Among them, the first input terminal of the differential amplifier 601 is connected to the first end of the capacitor 200, and the second input terminal of the differential amplifier 601 is connected to the second end of the capacitor 200. The output terminal of the differential amplifier 601 is respectively connected to the input terminals of the first window comparator 602 and the second window comparator 603, thereby sending the detected voltage magnitude across the capacitor 200 to the first window comparator 602 and the second window comparator 603.
[0066] The output terminal of the first window comparator 602 is connected to the first input terminal of the control unit 400, and the output terminal of the second window comparator 603 is connected to the second input terminal of the control unit 400. The enable terminal of the first window comparator 602 is connected to the first output terminal of the control unit 400, and the enable terminal of the second window comparator 603 is connected to the second output terminal of the control unit 400. The control unit 400 can determine the working state of the charge pump circuit according to the signal output by the first window comparator 602 or the second window comparator 603.
[0067] Exemplarily, when the first switch transistor 101 and the third switch transistor 103 are in the conducting state, and the second switch transistor 102, the fourth switch transistor 104, and the discharge switch transistor 301 are in the cutoff state, the first window comparator 602 can be opened under the enabling control of the control unit 400 to detect whether the voltage across the capacitor 200 is a first preset value (i.e., three - quarters of the input voltage), and feedback the detection result to the control unit 400 in the form of a digital signal.
[0068] If the voltage across the capacitor 200 is not equal to the first preset value, the charge pump circuit is operating abnormally. At this time, the control unit 400 will turn off each switch transistor in the switch transistor array 100 and feedback the error information to the upper - level processing unit.
[0069] When the second switch transistor 102 and the fourth switch transistor 104 are in the conducting state, and the first switch transistor 101, the third switch transistor 103, and the discharge switch transistor 301 are in the cutoff state, the second window comparator 603 can be opened under the enabling control of the control unit 400 to detect whether the voltage across the capacitor 200 is a second preset value (i.e., one - quarter of the input voltage), and feedback the detection result to the control unit 400 in the form of a digital signal.
[0070] If the voltage across the capacitor 200 is not equal to the second preset value, the charge pump circuit is operating abnormally. At this time, the control unit 400 will turn off each switch transistor in the switch transistor array 100 and feedback the error information to the upper - level processing unit.
[0071] Based on this, the embodiments of the present disclosure can also ensure the stability of the operation of the charge pump circuit by setting the detection unit 600, and timely stop the input and output of the charge pump circuit when the operating state of the charge pump circuit is abnormal, so as to avoid damage to the electronic device.
[0072] It should be noted that, in Figure 4 the illustrated embodiment, the control unit 400 has at least seven output terminals (for simplicity of representation, Figure 4 only one is shown). That is to say, in addition to the five output terminals that are the same as the five output terminals described in Figure 2 the embodiment, it at least further includes a first output terminal connected to the enabling terminal of the first window comparator 602 and a second output terminal connected to the enabling terminal of the second window comparator 603.
[0073] Exemplarily, the at least seven output terminals of the control unit 400 all output Pulse - Width Modulation (PWM) signals. By setting the duty cycle of the PWM signal to 50%, the charge pump circuit can have better voltage conversion efficiency.
[0074] Based on the same concept, an electronic device is further provided in an embodiment of the present disclosure, including the above charge pump circuit. Since the principle of solving problems in the embodiment of the electronic device is similar to that in the above embodiment of the charge pump circuit, the implementation of the embodiment of the electronic device can refer to the implementation of the above embodiment of the charge pump circuit, and the repeated parts will not be described again.
[0075] The embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
[0076] In addition, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.
Claims
1. A charge pump circuit, characterized in that: include: A switch tube array, comprising a plurality of switch tubes; a capacitor connected to the switch transistor array, capable of switching the on / off states of at least some of the plurality of switch transistors so that a first end of the capacitor is switched between being connected to a voltage input terminal of the charge pump circuit, being connected to a voltage output terminal of the charge pump circuit, and being disconnected from both the voltage input terminal and the voltage output terminal, and a second end of the capacitor is switched between being connected to the voltage output terminal and being grounded; a resistor connected in parallel with the capacitor via a discharge switch tube; A control unit is used to control the on / off states of the plurality of switch tubes in the switch tube array and the discharge switch tube, so as to control the voltage outputted by the voltage output terminal.
2. The charge pump circuit according to claim 1, wherein: The plurality of switch tubes are respectively a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; The first end of the capacitor is connected to the voltage input end through a first switch tube, and is connected to the voltage output end through a second switch tube; The second end of the capacitor is connected to the voltage output end through a third switch tube, and is grounded through a fourth switch tube.
3. The charge pump circuit according to claim 2, wherein: When the voltage across the capacitor is a first preset value, the first switch tube and the third switch tube are in an on state, and the second switch tube, the fourth switch tube and the discharge switch tube are in an off state; The first preset value is three quarters of the input voltage of the voltage input terminal.
4. The charge pump circuit according to claim 2, wherein: During the process of the voltage across the capacitor decreasing from the first preset value to the second preset value, the fourth switch tube and the discharge switch tube are in the on state, and the first switch tube, the second switch tube and the third switch tube are in the off state; The first preset value is three quarters of the input voltage of the voltage input terminal, and the second preset value is one quarter of the input voltage of the voltage input terminal.
5. The charge pump circuit according to claim 2, wherein: When the voltage across the capacitor is a second preset value, the second switch tube and the fourth switch tube are in an on state, and the first switch tube, the third switch tube and the discharge switch tube are in an off state; The second preset value is one quarter of the input voltage of the voltage input terminal.
6. The charge pump circuit according to claim 2, wherein: When the voltage across the capacitor increases from the second preset value to the first preset value, the first switch tube and the fourth switch tube are in the on state, and the second switch tube, the third switch tube and the discharge switch tube are in the off state; The first preset value is three quarters of the input voltage of the voltage input terminal, and the second preset value is one quarter of the input voltage of the voltage input terminal.
7. The charge pump circuit according to claim 1, wherein: The charge pump circuit also includes a detection unit, which is connected to the two ends of the capacitor and the control unit respectively, and is used to detect the voltage across the capacitor so that the control unit can determine the working state of the charge pump circuit based on the voltage across the capacitor.
8. The charge pump circuit according to claim 7, wherein: The detection unit includes: a differential amplifier, a first window comparator and a second window comparator; The first input terminal of the differential amplifier is connected to the first end of the capacitor, and the second input terminal of the differential amplifier is connected to the second end of the capacitor; The output end of the differential amplifier is connected to the input end of the first window comparator and the input end of the second window comparator respectively; The output terminal of the first window comparator is connected to the first input terminal of the control unit, and the output terminal of the second window comparator is connected to the second input terminal of the control unit; The enable terminal of the first window comparator is connected to the first output terminal of the control unit, and the enable terminal of the second window comparator is connected to the second output terminal of the control unit; The control unit is further configured to determine an operating state of the charge pump circuit according to a signal output by the first window comparator or the second window comparator.
9. The charge pump circuit according to any one of claims 1 to 8, characterized in that: Each of the plurality of switch tubes is a field effect tube or a triode, and the discharge switch tube is a field effect tube or a triode.
10. An electronic device, characterized in that: The method comprises the charge pump circuit according to any one of claims 1 to 9.