CN216216515U - Voltage-stabilizing power supply circuit of power management chip - Google Patents
Voltage-stabilizing power supply circuit of power management chip Download PDFInfo
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- CN216216515U CN216216515U CN202122491649.6U CN202122491649U CN216216515U CN 216216515 U CN216216515 U CN 216216515U CN 202122491649 U CN202122491649 U CN 202122491649U CN 216216515 U CN216216515 U CN 216216515U
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Abstract
The utility model discloses a voltage-stabilizing power supply circuit of a power management chip, which relates to the technical field of power control protection and comprises the following components: the device comprises a power supply control module, a clamping protection module, a voltage stabilization output module, a feedback protection module and an output protection module; the power supply control module is used for carrying out voltage stabilization control, the clamping protection module is used for limiting voltage, the voltage stabilization output module is used for DC-DC conversion, the feedback protection module is used for carrying out voltage sampling and feeding back to the power supply control module, and the output protection module is used for blocking current pulse. The voltage-stabilizing power supply circuit of the power management chip adopts the power management chip to match with surrounding components to output stable voltage, and a current pulse protection system is arranged at the output end of the power supply to block current pulses generated when the load is unstable, so that the current pulses are prevented from damaging electronic components in the voltage-stabilizing power supply circuit, and the output precision of the voltage-stabilizing power supply circuit is improved.
Description
Technical Field
The utility model relates to the technical field of power supply control protection, in particular to a voltage-stabilizing power supply circuit of a power supply management chip.
Background
The power supply is one of the important components of the electronic equipment, the quality of the power supply has important influence on the stability, safety and reliability of the electronic equipment, the miniaturization and high-power consumption development of computer equipment and high-efficiency portable electronic products put forward higher requirements on the volume, quality, efficiency, safety and the like of a power supply system of the computer equipment and high-efficiency portable electronic products, most of the voltage-stabilizing power supply circuits of the current power management chips directly process voltage through the power management chips so as to realize voltage-stabilizing output, but when the work of a load is unstable, current pulses are easily generated to influence the power supply precision of the power management chips, so that the output voltage is unstable, and even components are damaged.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a voltage-stabilizing power supply circuit of a power management chip, which aims to solve the problems in the background technology.
According to an embodiment of the present invention, a voltage-stabilizing power supply circuit for a power management chip is provided, the voltage-stabilizing power supply circuit for the power management chip includes: the device comprises a power supply control module, a clamping protection module, a voltage stabilization output module, a feedback protection module and an output protection module;
the power supply control module is used for performing voltage stabilization control on an input power supply through a power supply management chip;
the clamping protection module is connected with the first output end of the power supply control module and is used for limiting the overlarge voltage rising rate of the power supply control module;
the voltage stabilizing output module is connected with the second output end of the power supply control module and is used for carrying out DC-DC conversion on an input power supply;
the feedback protection module is connected with the first output end of the voltage stabilization output module and is used for sampling the voltage output by the voltage stabilization output module and feeding the voltage back to the power supply control module;
and the output protection module is connected with the second output end of the voltage stabilization output module and used for blocking current pulses generated by the connected load.
Compared with the prior art, the utility model has the beneficial effects that: the voltage-stabilizing power supply circuit of the power management chip adopts the power management chip to match with surrounding components to output stable voltage, and a current pulse protection system is arranged at the output end of the power supply to block current pulses generated when the load is unstable, so that the current pulses are prevented from damaging electronic components in the voltage-stabilizing power supply circuit, and the output precision of the voltage-stabilizing power supply circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a voltage-stabilizing power supply circuit of a power management chip according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a voltage-stabilizing power supply circuit of a power management chip according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a feedback protection module according to an embodiment of the present invention.
Reference numerals: 1. a power supply control module; 2. a clamp protection module; 3. a voltage stabilization output module; 4. a feedback protection module; 5. and an output protection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Example 1: referring to fig. 1, an embodiment of the present invention provides a voltage-stabilizing power supply circuit for a power management chip, where the voltage-stabilizing power supply circuit for the power management chip includes: the device comprises a power supply control module 1, a clamping protection module 2, a voltage stabilization output module 3, a feedback protection module 4 and an output protection module 5;
specifically, the power control module 1 is configured to perform voltage stabilization control on an input power through a power management chip;
the clamping protection module 2 is connected with the first output end of the power control module 1 and used for limiting the overlarge voltage rising rate of the power control module 1;
the voltage-stabilizing output module 3 is connected with the second output end of the power control module 1 and is used for carrying out DC-DC conversion on the input power;
the feedback protection module 4 is connected with the first output end of the voltage stabilization output module 3, and is used for sampling the voltage output by the voltage stabilization output module 3 and feeding the voltage back to the power supply control module 1;
and the output protection module 5 is connected with the second output end of the voltage stabilization output module 3 and used for blocking current pulses generated by the connected load.
In a specific embodiment, the power control module 1 may use a power management chip to detect input and output electric energy, so as to implement voltage stabilization control output; the clamping protection module 2 can adopt an RCD clamping protection circuit to limit the voltage rise rate of the circuit and ensure the safe operation of a switching tube; the voltage stabilizing output module 3 can control the output voltage by adopting a mode of controlling a transformer by a switching tube, wherein the conduction degree of the switching tube is controlled by the power supply control module 1; the feedback protection module 4 can detect the output voltage signal by adopting a resistance voltage division mode and feed back the voltage signal to the power control module 1 by an isolation transmission mode; the output protection module 5 can adopt a comparator and a transistor to avoid the influence of current pulse on the voltage-stabilizing power supply circuit of the power management chip and improve the precision of voltage-stabilizing output.
Example 2: based on embodiment 1, please refer to fig. 2, in an embodiment of the voltage-stabilizing power supply circuit of the power management chip according to the present invention, the power control module 1 includes a first resistor R1, a second resistor R2, a first capacitor C1, a power management chip, a power supply VIN, and a first diode D1;
specifically, a power supply end of the power management chip is connected to one end of a first capacitor C1, one end of a first resistor R1 and one end of a second resistor R2, the other end of the first resistor R1 is connected to a power supply VIN, the other end of the second resistor R2 is connected to a cathode of a first diode D1, and the other end of the first capacitor C1 is grounded.
Further, the clamp protection module 2 includes a third resistor R3, a second capacitor C2, and a second diode D2;
specifically, one end of the third resistor R3 and one end of the second capacitor C2 are both connected to the power supply VIN, and the other end of the second capacitor C2 and the other end of the third resistor R3 are connected to the cathode of the second diode D2.
Further, the voltage stabilizing output module 3 includes a first transformer W1, a second transformer W2, a third transformer W3, a first switch tube M1, a fourth resistor R4, a fifth resistor R5, a third diode D3, and a third capacitor C3;
specifically, a first end of the first transformer W1 is connected to a power supply VIN, a second end of the first transformer W1 is connected to an anode of the second diode D2 and a drain of the first switch tube M1, a first end of the second transformer W2 is connected to an anode of the first diode D1, a second end of the second transformer W2 is grounded, a gate of the first switch tube M1 is connected to the output end of the power management chip through the fourth resistor R4, a source of the first switch tube M1 is connected to the current feedback end of the power management chip and one end of the fifth resistor R5, the other end of the fifth resistor R5 is grounded, a first end of the third transformer W3 is connected to a first = end of the third capacitor C3 through an anode of the third diode D3, and a second end of the third capacitor C3 is connected to a second end of the third transformer W3.
Further, the feedback protection module 4 includes a sixth resistor R6, a seventh resistor R7, a fifth capacitor C5, a coupler J2, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6, a fourteenth resistor R14, and a voltage regulator J1;
specifically, one end of the fifth capacitor C5 and the third end of the coupler J2 are both connected to a voltage feedback end of the power management chip, the fourth end of the coupler J2 is grounded, the first end of the coupler J2 is connected to one end of a thirteenth resistor R13, the first end of a sixth resistor R6 and the first end of a third capacitor C3 through a twelfth resistor R12, the second end of the coupler J2 is connected to the other end of a thirteenth resistor R13, the first end of a regulator J1 and one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected to the third end of a regulator J1, the second end of a sixth resistor R6 and one end of a seventh resistor R7 through a fourteenth resistor R14, the other end of a seventh resistor R7 is grounded, and the third end of a regulator J1 is grounded.
Further, the output protection module 5 includes a fourth capacitor C4, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first comparator a1, a second switching tube N1, a third switching tube N2, a fourth switching tube P1, and an eleventh resistor R11;
specifically, one end of the fourth capacitor C4, one end of the eighth resistor R8 and one end of the ninth resistor R9 are all connected to the first end of the third capacitor C3, the other end of the eighth resistor R8 is connected to the collector of the third switching tube N2 and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the inverting terminal of the first comparator a1 and the emitter of the fourth switching tube P1, the non-inverting terminal of the first comparator a1 is connected to the collector of the second switching tube N1 and the other end of the ninth resistor R9, the emitter of the second switching tube N1, the base of the third switching tube N2 and the collector of the fourth switching tube P1 are all grounded through the eleventh resistor R11, and the output end of the first comparator a1 is connected to the base of the second switching tube N1 and the base of the fourth switching tube P1.
In a specific embodiment, the specific type of the power management chip is not limited herein; the first switch tube M1 can be an N-channel enhanced metal-oxide-semiconductor field effect transistor (MOSFET), and the conduction degree of the first switch tube is controlled by a power management chip, so that the change of the power DC-DC is realized; the fifth resistor R5 is a current sampling resistor, and is used for current sampling of the power management chip; the sixth resistor R6 and the seventh resistor R7 are voltage sampling resistors; the voltage stabilizer J1 can be selected from TL431 adjustable close parallel voltage stabilizers; the coupler J2 can be isolated and driven by a TLP521 or a 6N137 photoelectric coupler J2, and here, a TLP521 coupler J2 is selected to realize signal isolation transmission; the first comparator a1 can be an LM339 voltage comparator, and is used for comparing input signals and outputting control signals; the second switching tube N1 and the third switching tube N2 may be NPN transistors; the fourth switching tube P1 may be a PNP transistor.
In the embodiment of the utility model, a power supply control module 1 receives and processes a voltage feedback signal output by a feedback protection module 4, and then outputs a control signal to control a voltage stabilization output module 3 to work, so that voltage stabilization output is realized, an output protection module 5 detects a current pulse signal generated by a load, the influence of the current pulse on a voltage stabilization power supply circuit of a power supply management chip is avoided, and meanwhile, a clamping protection module 2 is used for limiting the voltage rise rate of the power supply control module 1 to be overlarge, so that the safe operation of a switching tube is ensured; in the regulated output module 3, a fifth resistor R5 samples a current signal when the first switch tube M1 is turned on, the feedback protection module 4 samples an output voltage signal through a sixth resistor R6 and a seventh resistor R7, the power management chip in the power control module 1 receives the current voltage signal and controls the first switch tube M1 in the regulated output module 3 to operate, and utilizes a transformer to perform DC-DC change to output a stable voltage, in the output protection module 5, when the first comparator a1 outputs a low level, the fourth switch tube P1 is turned on, the second switch tube N1 is turned off, the third switch tube N2 is also turned off, and further a current pulse is blocked from flowing into the regulated power supply circuit of the power management chip, when the output voltage is stable and the load is stable, a voltage drop generated by the input current of the eighth resistor R8 at the ninth resistor R9 is greater than a voltage drop generated by the output current of the eighth resistor R8 at the tenth resistor R10, the first comparator a1 outputs high level, the second switch tube N1 is turned on, the third switch tube N2 is turned on, the fourth switch tube P1 is turned off, and power is supplied normally.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a power management chip steady voltage supply circuit which characterized in that:
this power management chip steady voltage supply circuit includes: the device comprises a power supply control module, a clamping protection module, a voltage stabilization output module, a feedback protection module and an output protection module;
the power supply control module is used for performing voltage stabilization control on an input power supply through a power supply management chip;
the clamping protection module is connected with the first output end of the power supply control module and is used for limiting the overlarge voltage rising rate of the power supply control module;
the voltage stabilizing output module is connected with the second output end of the power supply control module and is used for carrying out DC-DC conversion on an input power supply;
the feedback protection module is connected with the first output end of the voltage stabilization output module and is used for sampling the voltage output by the voltage stabilization output module and feeding the voltage back to the power supply control module;
and the output protection module is connected with the second output end of the voltage stabilization output module and used for blocking current pulses generated by the connected load.
2. The regulated power supply circuit of claim 1, wherein said power control module comprises a first resistor, a second resistor, a first capacitor, a power management chip, a power supply and a fourth diode;
the power supply end of the power supply management chip is connected with one end of the first capacitor, one end of the first resistor and one end of the second resistor, the other end of the first resistor is connected with the power supply, the other end of the second resistor is connected with the cathode of the first diode, and the other end of the first capacitor is grounded.
3. The power management chip voltage-stabilizing power supply circuit according to claim 2, wherein the clamping protection module comprises a third resistor, a second capacitor and a second diode;
and one end of the third resistor and one end of the second capacitor are both connected with a power supply, and the other end of the second capacitor and the other end of the third resistor are connected with the cathode of the second diode.
4. The power management chip voltage-stabilizing power supply circuit according to claim 3, wherein the voltage-stabilizing output module comprises a first transformer, a second transformer, a third transformer, a first switch tube, a fourth resistor, a fifth resistor, a third diode and a third capacitor;
the first end of the first transformer is connected with a power supply, the second end of the first transformer is connected with the anode of the second diode and the drain electrode of the first switch tube, the first end of the second transformer is connected with the anode of the first diode, the second end of the second transformer is grounded, the grid electrode of the first switch tube is connected with the output end of the power management chip through the fourth resistor, the source electrode of the first switch tube is connected with the current feedback end of the power management chip and one end of the fifth resistor, the other end of the fifth resistor is grounded, the first end of the third transformer is connected with the first = one end of the third capacitor through the anode of the third diode, and the second end of the third capacitor is connected with the second end of the third transformer.
5. The regulated power supply circuit of claim 4, wherein said feedback protection module comprises a sixth resistor, a seventh resistor, a fifth capacitor, a coupler, a twelfth resistor, a thirteenth resistor, a sixth capacitor, a fourteenth resistor, and a voltage stabilizer;
one end of the fifth capacitor and the third end of the coupler are both connected with a voltage feedback end of the power management chip, the fourth end of the coupler is grounded, the first end of the coupler is connected with one end of the thirteenth resistor through the twelfth resistor, the first end of the sixth resistor and the first end of the third capacitor, the second end of the coupler is connected with the other end of the thirteenth resistor, the first end of the voltage stabilizer and one end of the sixth capacitor, the other end of the sixth capacitor is connected with the third end of the voltage stabilizer through the fourteenth resistor, the second end of the sixth resistor and one end of the seventh resistor, the other end of the seventh resistor is grounded, and the third end of the voltage stabilizer is grounded.
6. The power management chip voltage-stabilizing power supply circuit according to claim 4, wherein the output protection module comprises a fourth capacitor, an eighth resistor, a ninth resistor, a tenth resistor, a first comparator, a second switching tube, a third switching tube, a fourth switching tube and an eleventh resistor;
one end of the fourth capacitor, one end of the eighth resistor and one end of the ninth resistor are connected with the first end of the third capacitor, the other end of the eighth resistor is connected with a collector of the third switch tube and one end of the tenth resistor, the other end of the tenth resistor is connected with an inverting terminal of the first comparator and an emitter of the fourth switch tube, the inverting terminal of the first comparator is connected with a collector of the second switch tube and the other end of the ninth resistor, the emitter of the second switch tube, a base of the third switch tube and the collector of the fourth switch tube are grounded through the eleventh resistor, and an output end of the first comparator is connected with the base of the second switch tube and the base of the fourth switch tube.
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| CN202122491649.6U CN216216515U (en) | 2021-10-16 | 2021-10-16 | Voltage-stabilizing power supply circuit of power management chip |
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| CN202122491649.6U CN216216515U (en) | 2021-10-16 | 2021-10-16 | Voltage-stabilizing power supply circuit of power management chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213261A1 (en) * | 2022-05-06 | 2023-11-09 | 长春捷翼汽车科技股份有限公司 | Wireless charging voltage stabilizing circuit, power supply, and new energy vehicle |
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2021
- 2021-10-16 CN CN202122491649.6U patent/CN216216515U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213261A1 (en) * | 2022-05-06 | 2023-11-09 | 长春捷翼汽车科技股份有限公司 | Wireless charging voltage stabilizing circuit, power supply, and new energy vehicle |
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