CN115940642A - Switch tube conduction speed control circuit - Google Patents
Switch tube conduction speed control circuit Download PDFInfo
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- CN115940642A CN115940642A CN202310233301.8A CN202310233301A CN115940642A CN 115940642 A CN115940642 A CN 115940642A CN 202310233301 A CN202310233301 A CN 202310233301A CN 115940642 A CN115940642 A CN 115940642A
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Abstract
The application discloses switch tube conduction speed control circuit, concretely relates to battery power supply technical field. The control circuit comprises a main power switch tube, a driving circuit, a slope detection circuit and a voltage detection circuit; in the driving circuit, a power supply voltage end is connected to a control end of a main power switch tube through a first current source and a second switch tube; the power supply voltage end is also connected to the control end of the main power switching tube through a third switching tube; in the voltage detection circuit, the output end of the fifth switching tube is connected to the first node; the first node is grounded through a main power switch tube; the input end of the fifth switching tube is connected with the control end of the third switching tube; the control end of the second switching tube is connected with a control signal; the slope detection circuit is used for detecting the slope of the voltage at the first node and controlling the voltage at the output end of the fourth switch tube according to the slope. The battery charging circuit comprises the control circuit. Based on above-mentioned circuit, the work efficiency of battery charging circuit has been improved.
Description
Technical Field
The application relates to the technical field of battery power supply, in particular to a switch tube conduction speed control circuit.
Background
The main circuit of the battery charging circuit is important in battery charging or battery powered scenarios.
In the prior art, a common DC-DC converter, such as a flyback converter or a push-pull converter, is usually adopted as a main circuit of a battery charging circuit. At this time, if the conduction speed of the main power switch in the converter is high, the output current of the main power switch driving circuit is increased, thereby increasing the power consumption of the battery charging circuit, and if the conduction speed of the main power switch in the converter is low, the operating efficiency of the battery charging circuit is reduced.
Disclosure of Invention
The application provides a switch tube conduction speed control circuit to under battery charging or battery power supply scene, reduce battery charging circuit's consumption, improve battery charging circuit's work efficiency. The technical scheme is as follows.
On one hand, the control circuit for the conduction speed of the switching tube comprises a main power switching tube M1, a driving circuit, a slope detection circuit and a voltage detection circuit;
in the driving circuit, a power supply voltage end is connected to a control end of the main power switch tube M1 through a first current source I1 and a second switch tube M2; the power supply voltage end is also connected to the control end of the main power switch tube M1 through a third switch tube M3;
in the voltage detection circuit, the power supply voltage end is grounded through a third resistor R3 and a second current source I2; the power supply voltage end is grounded through a third controllable current source G3, a fourth switching tube M4 and a fourth resistor R4 in sequence; the power supply voltage end is grounded through a fourth controllable current source G4, a fifth switching tube M5 and a fifth resistor R5 in sequence; the fourth switching tube M4 is connected with the control end of the fifth switching tube M5; the control ends of the third controllable current source G3 and the fourth controllable current source G4 are both connected to two ends of the third resistor R3; the output end of the fifth switching tube M5 is connected to the first node; the first node is grounded through a main power switch tube M1;
the input end of the fifth switching tube M5 is connected with the control end of the third switching tube M3; the control end of the second switch tube M2 is connected with a control signal;
the slope detection circuit is used for detecting the slope of the voltage at the first node and controlling the voltage at the output end of the fourth switching tube M4 according to the slope of the voltage at the first node.
In a possible implementation manner, the slope detection circuit includes a first resistor R1, a first capacitor C1, a first controllable current source G1, a second controllable current source G2, and a second resistor R2;
in the slope detection circuit, a power input end is connected to the first node through the first resistor R1 and the first capacitor C1;
the power supply input end is grounded through a first controllable current source G1 and a second resistor R2;
the output end of the fourth switch tube M4 is grounded through a second controllable current source G2;
the control end of the first controllable current source G1 is connected to two ends of a first resistor R1; the control end of the second controllable current source G2 is connected to two ends of the second resistor R2.
In a possible implementation, the current generated in the first controllable current source G1 and the current generated in the second controllable current source G2 are equal to the capacitance current in the first capacitance C1.
In one possible implementation manner, the fourth resistor R4 and the fifth resistor R5 are both target resistance values.
In a possible implementation manner, when the voltage of the main power switch M1 operates in the linear resistance region, the voltage of the output terminal of the fourth switch transistor M4 is greater than the voltage of the output terminal of the fifth switch transistor M5, so that the voltage of the input terminal of the fifth switch transistor M5 becomes a low level to turn on the third switch transistor M3.
In a possible implementation manner, when the voltage at the output terminal of the fourth switching transistor M4 is greater than the voltage at the output terminal of the fifth switching transistor M5, the main power switching transistor M1 is fully turned on, and the time for which the main power switching transistor M1 is turned on is related to the gate capacitances of the first current source I1 and the main power switching transistor M1.
In one possible implementation, the product of the current output by the second current source I2 and the target resistance value belongs to [100mv,300mv ].
In a possible implementation manner, the second switching tube M2 and the third switching tube M3 are both PMOS tubes;
or, the second switch tube M2 and the third switch tube M3 are both PNP triodes.
In a possible implementation manner, the fourth switching tube M4 and the fifth switching tube M5 are both NMOS tubes;
or, the fourth switching tube M4 and the fifth switching tube M5 are both NPN triodes.
In another aspect, a battery charging circuit is provided, which includes the switch tube conduction speed control circuit.
The technical scheme provided by the application can comprise the following beneficial effects:
in the switching tube on-speed control circuit provided by the application, a power supply voltage end is connected to a control end of a main power switching tube through a first current source and a second switching tube, the power supply voltage end is also connected to the control end of the main power switching tube through a third switching tube, the first current source in the switching tube on-speed control circuit can be designed according to gate capacitance parameters of the main power switching tube at the moment, the gate capacitance of the main power switching tube is charged through the designed first current source, and when the gate capacitance voltage is charged to enable the main power switching tube to enter a linear resistance region, the main power switching tube is rapidly and completely turned on through the third switching tube, so that the on control of the main power switching tube is realized, namely, the main power switching tube is turned on within required on time.
The switch tube conduction speed control circuit comprises a slope detection circuit and a voltage detection circuit, and when the slope detection circuit and the voltage detection circuit meet detection conditions simultaneously, the main power switch tube can be completely conducted, the main power switch tube is prevented from being conducted by mistake, and therefore the reliability of the switch tube conduction speed control circuit is improved.
And when the main power switch tube is completely conducted, the switch tube conduction speed control circuit can further reduce the conduction resistance of the main power switch tube, so that the conduction loss when the main power switch tube is completely conducted is the lowest.
And the battery charging circuit is designed to comprise the switch tube conduction speed control circuit, so that the conduction speed of the main power switch tube can be controlled according to the actual requirement of the battery charging circuit, the power consumption of the battery charging circuit is reduced, and the working efficiency of the battery charging circuit is improved.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram illustrating a switching tube conduction speed control circuit according to an exemplary embodiment.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic diagram illustrating a switching tube conduction speed control circuit according to an exemplary embodiment. As shown in fig. 1, the control circuit includes a main power switch M1, a driving circuit, a slope detection circuit and a voltage detection circuit;
in the driving circuit, a power supply voltage end is connected to a control end of the main power switch tube M1 through a first current source I1 and a second switch tube M2; the power supply voltage end is also connected to the control end of the main power switch tube M1 through a third switch tube M3;
in the voltage detection circuit, the power supply voltage end is grounded through a third resistor R3 and a second current source I2; the power supply voltage end is grounded through a third controllable current source G3, a fourth switching tube M4 and a fourth resistor R4 in sequence; the power supply voltage end is grounded through a fourth controllable current source G4, a fifth switching tube M5 and a fifth resistor R5 in sequence; the fourth switching tube M4 is connected to the control end of the fifth switching tube M5; the control terminals of the third controllable current source G3 and the fourth controllable current source G4 are connected to the two ends of the third resistor R3; the output end of the fifth switch tube M5 is connected to the first node; the first node is grounded through a main power switch tube M1; the control end of the fourth switching tube M4 is connected with the input end of the fourth switching tube M4;
the input end of the fifth switching tube M5 is connected with the control end of the third switching tube M3; the control end of the second switch tube M2 is connected with a control signal;
the slope detection circuit is used for detecting the slope of the voltage at the first node SW and controlling the voltage at the output end of the fourth switching tube M4 according to the slope of the voltage at the first node SW.
In a possible implementation manner, the slope detection circuit includes a first resistor R1, a first capacitor C1, a first controllable current source G1, a second controllable current source G2, and a second resistor R2;
in the slope detection circuit, a power input terminal VIN is connected to the first node SW through the first resistor R1 and a first capacitor C1;
the power input end is grounded through a first controllable current source G1 and a second resistor R2;
the output end of the fourth switch tube M4 is grounded through a second controllable current source G2;
the control end of the first controllable current source G1 is connected to the two ends of the first resistor R1; the control terminal of the second controllable current source G2 is connected to two terminals of the second resistor R2.
In a possible implementation, the current generated in the first controllable current source G1 and the current generated in the second controllable current source G2 are both equal to the capacitance current in the first capacitor C1.
In one possible implementation manner, the fourth resistor R4 and the fifth resistor R5 are both target resistance values.
In a possible implementation manner, when the main power switch M1 operates in a linear resistance region, the voltage at the output terminal of the fourth switch transistor M4 is greater than the voltage at the output terminal of the fifth switch transistor M5, so that the voltage at the input terminal of the fifth switch transistor M5 becomes a low level, so as to turn on the third switch transistor M3.
In a possible implementation manner, when the voltage at the output terminal of the fourth switching transistor M4 is greater than the voltage at the output terminal of the fifth switching transistor M5, the main power switching transistor M1 is fully turned on, and the time for which the main power switching transistor M1 is turned on is related to the gate capacitances of the first current source I1 and the main power switching transistor M1.
In one possible implementation, the product of the current output by the second current source I2 and the target resistance value belongs to [100mv,300mv ].
In a possible implementation manner, the second switching tube M2 and the third switching tube M3 are both PMOS tubes;
or, the second switching tube M2 and the third switching tube M3 are both PNP triodes.
In a possible implementation manner, the fourth switching tube M4 and the fifth switching tube M5 are both NMOS tubes;
or, the fourth switching tube M4 and the fifth switching tube M5 are both NPN triodes.
The working principle of the switching tube conduction speed control circuit shown in fig. 1 is as follows:
when the main power switch tube M1 needs to be turned on, the control signal CLK connected to the control end of the second switch tube M2 changes to a low level, the second switch tube M2 is turned on, the first current source I1 charges the GATE capacitor of the main power switch tube M1, the control end voltage GATE of the main power switch tube M1 slowly increases, the main power switch tube M1 slowly turns on, and the lower plate voltage of the first capacitor C1 is slowly pulled down.
At this time, it is understood from the capacitance characteristics that the upper plate voltage of the first capacitor C1 is reduced with the lower plate voltage, and the voltage difference between the upper plate voltage and the lower plate voltage is not changed. Thus, a capacitive current I is generated in the branch consisting of the first resistor R1, the first capacitor C1 and the main power switch M1 C And the capacitance current I is obtained from the capacitance current formula C = C × dv/dt, so at this time, the current generated in the first controllable current source G1 is equal to the capacitor current I C Thus, both the second resistor R2 and the second controllable current source G2 are generatedMagnitude of the capacitance current I C Of the current of (c).
Meanwhile, due to the existence of the second current source I2, the current I always flows in the third resistor R3 2 . At this time, the magnitude of the current generated in the third controllable current source G3 and the fourth controllable current source G4 is I 2 Of the current of (c). Current I generated by a third controllable current source G3 2 The gate capacitors of the fourth switching tube M4 and the fifth switching tube M5 are charged, and the fourth switching tube M4 and the fifth switching tube M5 are turned on.
At this time, the fourth resistor R4 and the fifth resistor R5 are designed to have equal resistance values, which are denoted as R. And due to the pull-down current generated in the second controllable current source G2 (the pull-down current is equal to the capacitance current I) C ) Part of the current flowing through the fourth switching tube M4 is pumped away, so that the output end voltage V of the fourth switching tube M4 A Is pulled low. Moreover, since the output end of the fifth switch tube M5 is connected to the first node SW, the voltage of the first node SW is the lower plate voltage of the first capacitor C1, and since the first node SW is connected to the main topology, when the main power switch tube M1 is turned off, the voltage of the first node SW is at a high level, so that when the main power switch tube M1 just starts to be turned on, the voltage of the first node SW is higher, that is, at this time, the voltage of the output end of the fifth switch tube M5 is higher.
Therefore, the voltage difference between the control terminal and the output terminal of the fourth switching tube M4 is greater than the voltage difference between the control terminal and the output terminal of the fifth switching tube M5, so that the current flowing through the fifth switching tube M5 is less than the current I 2 The voltage CLKB at the input end of the fifth switching tube M5 is at a high level, and the third switching tube M3 is turned off.
When the control end voltage GATE of the main power switch tube M1 rises to a certain degree along with the charging of the GATE capacitance of the main power switch tube M1 by the first current source I1, the voltage difference V between the drain electrode and the source electrode of the main power switch tube M1 DS Much less than V GS -V TH Therefore, when the main power switch tube M1 enters the linear resistance region, the voltage of the first node SW cannot be pulled down by the main power switch tube M1, and the upper plate voltage and the lower plate voltage of the first capacitor C1 are not changed. Wherein, V GS Is the voltage difference between the grid and the source of the main power switch tube M1, V TH Is the turn-on voltage of the main power switch tube M1.
Therefore, at this time, the rate of change dv/dt of the voltage of the first capacitor plate is 0, which is determined by the capacitor current I C Capacitance Current I = Cx dv/dt C Becomes 0, and the current I flowing through the fourth switch tube M4 2 All flows into the fourth resistor R4, and therefore, the voltage at the point a (i.e. the voltage at the output end of the fourth switching tube M4) rises to V A =I 2 ×R。
Meanwhile, after the main power switch tube M1 enters the linear resistance region, the voltage of the first node SW is a low value close to 0V, so that the voltage at the point a is greater than the voltage of the first node SW, and the voltage difference between the control end and the output end of the fourth switch tube M4 is less than the voltage difference between the control end and the output end of the fifth switch tube M5. The current flowing through the fifth switch tube M5 is greater than the current I 2 When the voltage CLKB at the input end of the fifth switching tube M5 becomes a low level, the third switching tube M3 is turned on, and the voltage at the control end of the main power switching tube M1 is rapidly pulled to the voltage VDD at the power supply voltage end, thereby realizing the complete turn-on of the main power switching tube M1.
It should be noted that VIN in fig. 1 is the voltage of the power input terminal.
Note that, in this application, I 2 The value of xr cannot be too large nor too small. If I 2 If the value of xr is too large, the voltage of the first node SW is not yet reduced to the minimum, and the voltage of the first node SW is smaller than the voltage of the point a, so that the third switch tube M3 is turned on by mistake; if I 2 The value of xr is too small, which causes the voltage of the first node SW to be still greater than the voltage at point a after the voltage at the first node SW is minimized, and thus the third switch M3 cannot be turned on. Therefore, I needs to be 2 The value of x R is designed to be within a reasonable range, and the application designs I 2 The value of x R is designed to be 100mV to 300mV.
It should be noted that, in the present application, the gate capacitor of the main power switch tube M1 is charged by the first current source I1, and when the voltage of the gate capacitor of the main power switch tube M1 is charged to make the main power switch tube M1 enter the linear resistance region, the main power switch tube M1 is rapidly and completely turned on, so as to implement the turn-on control of the main power switch tube M1. The specific on-time of the main power switch M1 is determined by the magnitude of the first current source I1 and the gate capacitance of the main power switch M1. Meanwhile, the gate capacitance parameters of the main power switch tube M1 are different in different processes, different materials and different areas. Therefore, the first current source needs to be designed for a specific main power switch tube, so as to obtain the required specific on-time of the main power switch tube.
Note that the detection circuit in the present application is divided into a slope detection circuit and a voltage detection circuit. The slope detection circuit detects the voltage slope of the first node SW, when the voltage of the first node SW is not changed, the voltage slope of the first node SW is 0, the electrode plate voltage change rate dv/dt of the first capacitor C1 is 0, and the slope detection circuit does not generate pull-down current; the voltage of the point A is increased, which indicates that the main power switch tube M1 enters the linear resistance area at the moment, so that the detection that the main power switch tube M1 enters the linear resistance area is realized. When the main power switch tube M1 enters the linear resistance region, and the voltage detection circuit detects that the voltage of the first node SW is less than the voltage at the point A (i.e. I) 2 Xr), this indicates that the main power switch M1 has reached a fully conductive state. Therefore, at this time, the control terminal voltage GATE of the main power switch tube M1 is rapidly pulled to the voltage VDD of the power supply voltage terminal, so that the on-resistance of the main power switch tube M1 is further reduced while the main power switch tube M1 is completely turned on, thereby minimizing the conduction loss when the main power switch tube M1 is completely turned on.
In an exemplary embodiment, the present application further provides a battery charging circuit, which includes the above switch tube conduction speed control circuit. In the battery charging circuit comprising the switch tube conduction speed control circuit, the conduction speed of the main power switch tube can be controlled within a proper range according to the actual requirement of the battery charging circuit, so that the power consumption of the battery charging circuit is reduced, and the working efficiency of the battery charging circuit is improved.
In summary, in the switching tube conduction speed control circuit provided by the present application, the power supply voltage end is connected to the control end of the main power switching tube through the first current source and the second switching tube, and the power supply voltage end is further connected to the control end of the main power switching tube through the third switching tube, at this time, the first current source in the switching tube conduction speed control circuit may be designed according to the gate capacitance parameter of the main power switching tube, and the gate capacitance of the main power switching tube is charged through the designed first current source, and after the gate capacitance voltage is charged to make the main power switching tube enter the linear resistance region, the main power switching tube is rapidly and completely turned on by turning on the third switching tube, so as to implement conduction control of the main power switching tube, that is, the main power switching tube is turned on within the required conduction time.
The switch tube conduction speed control circuit comprises a slope detection circuit and a voltage detection circuit, and when the slope detection circuit and the voltage detection circuit meet detection conditions at the same time, the main power switch tube can be completely conducted, the main power switch tube is prevented from being conducted by mistake, and therefore the reliability of the switch tube conduction speed control circuit is improved.
And when the main power switch tube is completely conducted, the switch tube conduction speed control circuit can further reduce the conduction resistance of the main power switch tube, so that the conduction loss when the main power switch tube is completely conducted is the lowest.
And the battery charging circuit is designed to comprise the switch tube conduction speed control circuit, so that the conduction speed of the main power switch tube can be controlled according to the actual requirement of the battery charging circuit, the power consumption of the battery charging circuit is reduced, and the working efficiency of the battery charging circuit is improved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A switching tube conduction speed control circuit is characterized in that the control circuit comprises a main power switching tube M1, a driving circuit, a slope detection circuit and a voltage detection circuit;
in the driving circuit, a power supply voltage end is connected to a control end of the main power switch tube M1 through a first current source I1 and a second switch tube M2; the power supply voltage end is also connected to the control end of the main power switch tube M1 through a third switch tube M3;
in the voltage detection circuit, the power supply voltage end is grounded through a third resistor R3 and a second current source I2; the power supply voltage end is grounded through a third controllable current source G3, a fourth switching tube M4 and a fourth resistor R4 in sequence; the power supply voltage end is grounded through a fourth controllable current source G4, a fifth switching tube M5 and a fifth resistor R5 in sequence; the fourth switching tube M4 is connected with the control end of the fifth switching tube M5; the control ends of the third controllable current source G3 and the fourth controllable current source G4 are both connected to two ends of the third resistor R3; the output end of the fifth switching tube M5 is connected to a first node; the first node is grounded through a main power switch tube M1;
the input end of the fifth switching tube M5 is connected with the control end of the third switching tube M3; the control end of the second switching tube M2 is connected with a control signal;
the slope detection circuit is used for detecting the slope of the voltage at the first node and controlling the voltage at the output end of the fourth switching tube M4 according to the slope of the voltage at the first node.
2. The control circuit according to claim 1, wherein the slope detection circuit comprises a first resistor R1, a first capacitor C1, a first controllable current source G1, a second controllable current source G2, and a second resistor R2;
in the slope detection circuit, a power input end is connected to the first node through the first resistor R1 and the first capacitor C1;
the power supply input end is grounded through a first controllable current source G1 and a second resistor R2;
the output end of the fourth switch tube M4 is grounded through a second controllable current source G2;
the control end of the first controllable current source G1 is connected to two ends of a first resistor R1; the control end of the second controllable current source G2 is connected to two ends of the second resistor R2.
3. The control circuit according to claim 2, wherein the current generated in the first controllable current source G1 and the current generated in the second controllable current source G2 are equal to the capacitance current in the first capacitor C1.
4. The control circuit of claim 3, wherein the fourth resistor R4 and the fifth resistor R5 are both target resistance values.
5. The control circuit according to claim 4, wherein when the main power switch M1 operates in the linear resistance region, the voltage at the output terminal of the fourth switch transistor M4 is greater than the voltage at the output terminal of the fifth switch transistor M5, so that the voltage at the input terminal of the fifth switch transistor M5 becomes a low level to turn on the third switch transistor M3.
6. The control circuit of claim 5, wherein when the voltage at the output terminal of the fourth switch transistor M4 is greater than the voltage at the output terminal of the fifth switch transistor M5, the main power switch transistor M1 is fully turned on, and the time for which the main power switch transistor M1 is turned on is related to the gate capacitances of the first current source I1 and the main power switch transistor M1.
7. The control circuit of claim 6, wherein the product of the current outputted by the second current source I2 and the target resistance value is [100mV,300mV ].
8. The control circuit according to any one of claims 1 to 7, wherein the second switching transistor M2 and the third switching transistor M3 are both PMOS transistors;
or, the second switching tube M2 and the third switching tube M3 are both PNP triodes.
9. The control circuit according to any one of claims 1 to 7, wherein the fourth switching transistor M4 and the fifth switching transistor M5 are both NMOS transistors;
or, the fourth switching tube M4 and the fifth switching tube M5 are both NPN triodes.
10. A battery charging circuit comprising the switching tube conduction speed control circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310233301.8A CN115940642B (en) | 2023-03-13 | 2023-03-13 | Switching tube conduction speed control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310233301.8A CN115940642B (en) | 2023-03-13 | 2023-03-13 | Switching tube conduction speed control circuit |
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| CN115940642B CN115940642B (en) | 2023-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116203304A (en) * | 2023-04-28 | 2023-06-02 | 苏州贝克微电子股份有限公司 | Current detection circuit with low temperature drift |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142259A (en) * | 2014-05-30 | 2015-12-09 | 英飞特电子（杭州）股份有限公司 | Device for inhibiting impact current |
| CN108448895A (en) * | 2018-02-13 | 2018-08-24 | 昂宝电子（上海）有限公司 | The simulation demagnetization method of sampling and system of Switching Power Supply output sampling |
| CN114584126A (en) * | 2022-05-07 | 2022-06-03 | 深圳芯能半导体技术有限公司 | Switching tube drive circuit |
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2023
- 2023-03-13 CN CN202310233301.8A patent/CN115940642B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142259A (en) * | 2014-05-30 | 2015-12-09 | 英飞特电子（杭州）股份有限公司 | Device for inhibiting impact current |
| CN108448895A (en) * | 2018-02-13 | 2018-08-24 | 昂宝电子（上海）有限公司 | The simulation demagnetization method of sampling and system of Switching Power Supply output sampling |
| CN114584126A (en) * | 2022-05-07 | 2022-06-03 | 深圳芯能半导体技术有限公司 | Switching tube drive circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116203304A (en) * | 2023-04-28 | 2023-06-02 | 苏州贝克微电子股份有限公司 | Current detection circuit with low temperature drift |
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