CN115117857A - Power supply management integrated circuit and power supply management system - Google Patents
Power supply management integrated circuit and power supply management system Download PDFInfo
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- CN115117857A CN115117857A CN202211044624.4A CN202211044624A CN115117857A CN 115117857 A CN115117857 A CN 115117857A CN 202211044624 A CN202211044624 A CN 202211044624A CN 115117857 A CN115117857 A CN 115117857A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- Engineering & Computer Science (AREA)
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- Control Of Voltage And Current In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to the technical field of voltage control, in particular to a power supply management integrated circuit and a power supply management system, wherein the integrated circuit comprises: the device comprises a switch module, a grid driving module and a comparison module; the comparison module is used for acquiring the power supply voltage output to the PWM chip by the switch module and stopping outputting a comparison signal to the grid driving module when the power supply voltage is less than the reference voltage; the grid driving module is used for outputting a driving signal to the switch module when the comparison signal is not received; the switch module is used for transmitting the power supply voltage from the power supply to the PWM chip through the driving signal when receiving the driving signal, and compared with the manual adjustment of the existing personnel, the safety is higher because the power supply voltage is transmitted from the power supply to the PWM chip when the power supply voltage is smaller than the reference voltage and the power supply voltage is stopped being transmitted from the power supply to the PWM chip when the power supply voltage is larger than the reference voltage.
Description
Technical Field
The invention relates to the technical field of voltage control, in particular to a power supply management integrated circuit and a power supply management system.
Background
PWM technology is a technology for controlling an analog circuit using a digital output of a microprocessor, and is widely used in many fields ranging from measurement, communication, to power control and conversion.
At present, in power supply systems with extremely wide output voltage variation ranges, such as QuickCharge and USBType-CPD, the output voltage of a PWM (pulse-width modulation) chip often exceeds the rated working voltage, so that the PWM chip enters an overvoltage protection state, the working power consumption of the chip is increased, the overvoltage protection state is prevented by only manually adjusting the input voltage of the PWM chip by a worker, the circuit is burnt out due to the fact that the regulation is not timely when the worker is out of time, and the safety is low.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a power supply management integrated circuit and a power supply management system, and aims to solve the technical problem that in the prior art, the safety is low when a worker manually adjusts the input voltage of a PWM chip.
To achieve the above object, the present invention provides a power management integrated circuit, including: the device comprises a switch module, a grid driving module and a comparison module;
the grid driving module is respectively connected with the switch module and the comparison module, and the switch module is respectively connected with a power supply and the PWM chip;
the comparison module is used for acquiring the power supply voltage output to the PWM chip by the switch module and stopping outputting a comparison signal to the grid drive module when the power supply voltage is smaller than a reference voltage;
the grid driving module is used for outputting a driving signal to the switch module when the comparison signal is not received;
and the switch module is used for transmitting the power supply voltage from the power supply to the PWM chip through the driving signal when the driving signal is received.
Optionally, the switch module comprises: a field effect transistor;
the source electrode of the field effect tube is connected with the power supply, the grid electrode of the field effect tube is connected with the grid electrode driving module, the drain electrode of the field effect tube is connected with the comparison module, and the drain electrode of the field effect tube is further connected with the PWM chip.
Optionally, the comparison module comprises: a comparator, a first resistor and a second resistor;
one end of the first resistor is connected with a drain electrode of the field effect transistor, the other end of the first resistor is connected with the second resistor, the other end of the second resistor is grounded, a first pin of the comparator is connected with the gate driving module, a second pin of the comparator is connected with one end, close to the second resistor, of the first resistor, and a fourth pin of the comparator is connected with one end, far away from the first resistor, of the second resistor.
Optionally, the power management integrated circuit further comprises: a thermal shutdown module;
the thermal shutdown module is connected with the grid driving module;
the grid driving module is also used for outputting a temperature signal to the thermal shutoff module when the comparison signal is not received;
the thermal shutdown module is used for receiving the temperature signal and outputting a shutdown signal to the gate drive module when the temperature signal is greater than a reference temperature;
the gate driving module is further configured to stop transmitting the supply voltage from the power supply to the PWM chip through the turn-off signal when receiving the turn-off signal.
In addition, to achieve the above object, the present invention further provides a power supply management system, including: a PWM chip, a power supply and a power supply management integrated circuit as described above;
the power supply management integrated circuit comprises a first resistor, a second resistor, a field effect transistor, a power supply management integrated circuit, a PWM chip and a power supply, wherein one end of the second resistor, which is grounded, of the power supply management integrated circuit is a first pin, the drain electrode of the field effect transistor of the power supply management integrated circuit is a second pin, the source level of the field effect transistor of the power supply management integrated circuit is a third pin, the first pin of the power supply management integrated circuit is grounded, the second pin of the power supply management integrated circuit is connected with the first pin of the PWM chip, the third pin of the power supply management integrated circuit is connected with the power supply, and the second pin of the PWM chip is connected with the power supply;
the power supply is used for supplying the power supply voltage to the power supply management integrated circuit;
and the power supply management integrated circuit is used for receiving the power supply voltage and transmitting the power supply voltage to the PWM chip when the power supply voltage is smaller than the reference voltage.
Optionally, the power supply includes: the secondary winding, the first auxiliary winding, the first diode and the first capacitor;
wherein the primary winding is configured to transmit the supply voltage to the first auxiliary winding;
the dotted terminal of the first auxiliary winding is connected with the anode of the first diode, the other end of the first auxiliary winding is grounded, the cathode of the first diode is connected with the third pin of the power supply management integrated circuit, the cathode of the first diode is connected with the first capacitor, and the other end of the first capacitor is grounded.
Optionally, the capacitance value of the first capacitor is not lower than 1 uF.
Optionally, the power supply management system further includes: a second capacitor;
one end of the second capacitor is connected with a second pin of the power supply management integrated circuit, and the other end of the second capacitor is grounded.
Optionally, the power supply management system further includes: a secondary winding;
the primary winding is further used for transmitting the power supply voltage to the secondary winding;
the dotted terminal of the secondary winding is connected with the second pin of the PWM chip, the dotted terminal of the secondary winding is further connected with a second diode, the anode of the second diode is connected with the secondary winding, the cathode of the second diode is connected with a third capacitor, the other end of the third capacitor is connected with the other end of the secondary winding, the cathode of the second diode is connected with a third resistor, the other end of the third resistor is close to one end of the secondary winding, the third resistor is far away from one end of the second diode and is further connected with a fourth resistor, and the other end of the fourth resistor is connected with the power supply management integrated circuit.
Optionally, the power supply management system further includes: a second auxiliary winding;
the dotted terminal of the second auxiliary winding is connected with the other end of the first auxiliary winding, the dotted terminal of the second auxiliary winding is connected with the first pin of the PWM chip, and the other end of the second auxiliary winding is grounded.
The invention includes: the device comprises a switch module, a grid driving module and a comparison module; the grid driving module is respectively connected with the switch module and the comparison module, and the switch module is respectively connected with a power supply and the PWM chip; the comparison module is used for acquiring the power supply voltage output to the PWM chip by the switch module and stopping outputting a comparison signal to the grid drive module when the power supply voltage is smaller than a reference voltage; the grid driving module is used for outputting a driving signal to the switch module when the comparison signal is not received; and the switch module is used for transmitting the power supply voltage from the power supply to the PWM chip through the driving signal when the driving signal is received. Compared with the prior manual regulation of personnel, the power supply voltage detection device can detect the magnitude of the power supply voltage in time and stop outputting the power supply voltage when the power supply voltage exceeds the reference voltage, does not need the participation of the personnel, saves the labor cost and has higher safety.
Drawings
FIG. 1 is a functional block diagram of a first embodiment of a power management integrated circuit according to the present invention;
FIG. 2 is a diagram of an internal circuit of a power management integrated circuit according to a first embodiment of the power management integrated circuit of the present invention;
fig. 3 is a circuit diagram of a power management system according to a first embodiment of the present invention;
fig. 4 is a circuit diagram of a power management system according to a second embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a functional block diagram of a power management integrated circuit according to a first embodiment of the present invention.
As shown in fig. 1, the power management integrated circuit U1 in this embodiment includes: a switch module 11, a gate driving module 12 and a comparison module 13;
the gate driving module 12 is respectively connected with the switching module 11 and the comparing module 13, and the switching module 11 is respectively connected with the power supply 1 and the PWM chip U2;
the comparison module 13 is configured to collect a power supply voltage output by the switch module 11 to the PWM chip U2, and stop outputting a comparison signal to the gate driving module 12 when the power supply voltage is less than a reference voltage Vref (not shown in the figure);
the gate driving module 12 is configured to output a driving signal to the switch module 11 when the comparison signal is not received;
the switch module 11 is configured to transmit the power supply voltage from the power supply 1 to the PWM chip U2 through the driving signal when receiving the driving signal.
It should be noted that the power management integrated circuit U1 provided in this embodiment can be applied to any scenario of supplying power to the PWM chip U2.
It is understood that the reference voltage Vref may be set according to actual conditions, and in the present embodiment, the reference voltage Vref may be 22V in consideration of the rated operating voltage of the PWM chip U2.
In a specific implementation, the comparison module 13 collects the power supply voltage output by the switch module 11, compares the power supply voltage with a reference voltage Vref, when the power supply voltage is less than the reference voltage Vref, it indicates that the power supply voltage at this time is within a rated working voltage, the comparison module 13 stops outputting a comparison signal to the gate driving module 12, when the gate driving module 12 does not receive the comparison signal, outputs a driving signal to the switch module 11, and the switch module 11 transmits the power supply voltage to the PWM chip U2 through the driving signal; when the power supply voltage is greater than the reference value, which indicates that the power supply voltage is outside the rated working voltage, the comparison module 13 outputs the comparison signal to the gate driving module 12, when the gate driving module 12 receives the comparison signal, the gate driving module stops outputting the driving signal to the switch module 11, and the switch module 11 stops transmitting the power supply voltage to the PWM chip U2.
Further, referring to fig. 2, fig. 2 is an internal circuit diagram of a power management integrated circuit in a first embodiment of the power management integrated circuit according to an embodiment of the present invention.
As shown in fig. 2, the switch module 11 includes: a field effect transistor MOS;
the source electrode of the field effect transistor MOS is connected with the power supply 1, the gate electrode of the field effect transistor MOS is connected with the gate driving module 12, the drain electrode of the field effect transistor MOS is connected with the comparing module 13, and the drain electrode of the field effect transistor MOS is further connected with the PWM chip U2.
It should be noted that a diode for reverse isolation may be further provided in the field effect transistor MOS.
In a specific implementation, the source of the field effect transistor MOS receives a supply voltage, the gate of the field effect transistor MOS receives a driving signal, and the drain of the field effect transistor MOS outputs a supply voltage, when the gate of the field effect transistor MOS does not receive the driving signal, the source of the field effect transistor MOS and the drain of the field effect transistor MOS are kept disconnected, and the supply voltage stops being transmitted from the power supply 1 to the PWM chip U2, and when the gate of the field effect transistor MOS receives the driving signal, the source of the field effect transistor MOS and the drain of the field effect transistor MOS are kept closed, and the supply voltage is transmitted from the power supply 1 to the PWM chip U2.
As shown in fig. 2, the comparison module 13 includes: a comparator N, a first resistor R1 and a second resistor R2;
one end of the first resistor R1 is connected to the drain of the fet MOS, the other end of the first resistor R1 is connected to the second resistor R2, the other end of the second resistor R2 is grounded, the first pin of the comparator N is connected to the gate driving module 12, the second pin of the comparator N is connected to the end of the first resistor R1 close to the second resistor R2, and the fourth pin of the comparator N is connected to the end of the second resistor R2 far from the first resistor R1.
It should be noted that the first pin of the comparator N is an output terminal of the comparator N, an output terminal of the comparator N is configured to output a comparison signal, the second pin of the comparator N is a positive input terminal of the comparator N, the positive input terminal of the comparator N is configured to collect the supply voltage, the third pin of the comparator N is an inverted input terminal of the comparator N, and the inverted input terminal of the comparator N is configured to input the reference voltage Vref.
In a specific implementation, the comparator N collects a power supply voltage through the first resistor R1, compares the power supply voltage with the reference voltage Vref, and when the power supply voltage is greater than the reference voltage Vref, it may indicate that the power supply voltage is greater than the rated working voltage at this time, and the output terminal of the comparator N outputs a comparison signal.
Further, as shown in fig. 2, considering that the gate driving module 12 is prone to temperature increase due to long operation time, the power management integrated circuit U1 further includes: a thermal shutdown module 14;
wherein the thermal shutdown module 14 is connected with the gate driving module 12;
the gate driving module 12 is further configured to output a temperature signal to the thermal shutdown module 14 when the comparison signal is not received;
the thermal shutdown module 14 is configured to receive the temperature signal, and output a shutdown signal to the gate driving module 12 when the temperature signal is greater than a reference temperature;
the gate driving module 12 is further configured to stop transmitting the power supply voltage from the power supply 1 to the PWM chip U2 through the shutdown signal when receiving the shutdown signal.
It should be understood that, a temperature sensor for detecting an internal ambient temperature may be disposed inside the gate driving module 12, and when the gate driving module 12 does not receive the comparison signal, it indicates that the gate driving module 12 is outputting the driving signal at this time, and the temperature sensor detects the internal ambient temperature and outputs a temperature signal to the thermal shutdown module 14.
It can be understood that the thermal shutdown module 14 is internally provided with a reference temperature, the preset temperature can be set according to the actual situation, and the thermal shutdown module 14 compares the received temperature signal with the reference temperature and outputs a shutdown signal to the gate driving module 12 when the temperature signal is greater than the reference temperature.
In a specific implementation, the gate driving module 12 outputs the detected internal temperature and outputs a temperature signal to the thermal shutdown module 14, when the temperature signal is greater than the reference temperature, the thermal shutdown module 14 outputs a shutdown signal to the gate driving module 12, and the gate driving module 12 stops outputting the power supply voltage to the PWM chip U2 when receiving the shutdown signal, so as to prevent the circuit from being burned out due to an excessively high internal temperature, thereby prolonging the service life.
In this embodiment, the comparator N compares the power supply voltage with the reference voltage Vref, and when the power supply voltage is greater than the reference voltage Vref, it may indicate that the power supply voltage is greater than the rated operating voltage at this time, and the output end of the comparator N outputs the comparison signal; the grid drive circuit outputs a drive signal when not receiving the comparison signal, and does not output the drive signal when receiving the comparison signal; when the gate of the field effect transistor MOS receives the driving signal, the source of the field effect transistor MOS and the drain of the field effect transistor MOS are kept open, and the supply voltage stops being transmitted from the power supply 1 to the PWM chip U2, and when the gate of the field effect transistor MOS receives the driving signal, the source of the field effect transistor MOS and the drain of the field effect transistor MOS are kept closed, and the supply voltage is transmitted from the power supply 1 to the PWM chip U2; compared with the prior manual regulation of personnel, the invention can timely detect the magnitude of the power supply voltage and stop outputting the power supply voltage when the power supply voltage exceeds the reference voltage Vref, does not need the participation of workers, saves labor cost and has higher safety, meanwhile, the grid driving module 12 outputs and detects the internal temperature and outputs a temperature signal to the thermal shutdown module 14, when the temperature signal is greater than the reference temperature, the thermal shutdown module 14 outputs a shutdown signal to the grid driving module 12, the grid driving module 12 stops outputting the power supply voltage to the PWM chip U2 when receiving the shutdown signal, thereby preventing the circuit from being burnt out due to the overhigh internal temperature, the service life is prolonged.
Further, for convenience of practical application, referring to fig. 3, fig. 3 is a circuit diagram of a first embodiment of the power management system according to the embodiment of the present invention.
As shown in fig. 3, the power supply management system includes: a PWM chip U2, a power supply 1 and a power management integrated circuit U1 as described above;
the grounded end of the second resistor R2 of the power supply management integrated circuit U1 is a first pin, the drain of the field effect transistor MOS of the power supply management integrated circuit U1 is a second pin, the source of the field effect transistor MOS of the power supply management integrated circuit U1 is a third pin, the first pin of the power supply management integrated circuit U1 is grounded, the second pin of the power supply management integrated circuit U1 is connected with the first pin of the PWM chip U2, the third pin of the power supply management integrated circuit U1 is connected with the power supply 1, and the second pin of the PWM chip U2 is connected with the power supply 1;
the power supply 1 is configured to provide the power supply voltage to the power management integrated circuit U1;
the power management integrated circuit U1 is configured to receive the power supply voltage and transmit the power supply voltage to the PWM chip U2 when the power supply voltage is less than the reference voltage Vref.
In a specific implementation, the third pin of the power management integrated circuit U1 receives the power supply voltage, and outputs the power supply voltage from the second pin of the power management integrated circuit U1 to the first pin of the PWM chip U2 when the power supply voltage is less than the reference voltage Vref.
Further, as shown in fig. 3, the power supply 1 includes: a primary winding L1, a first auxiliary winding L, a first diode LED1, and a first capacitor C1;
the primary winding L1 is used for transmitting the power supply voltage to the first auxiliary winding L;
the dotted terminal of the first auxiliary winding L is connected to the anode of the first diode LED1, the other terminal of the first auxiliary winding L is grounded, the cathode of the first diode LED1 is connected to the third pin of the power supply management integrated circuit U1, the cathode of the first diode LED1 is connected to the first capacitor C1, and the other terminal of the first capacitor C1 is grounded.
It should be noted that, the first capacitor C1 can prevent the current fluctuation generated when the supply voltage output by the auxiliary winding changes, from affecting the normal operation of the circuit, and ensure that the power supply management integrated circuit U1 operates stably, and the capacitance value of the first capacitor C1 is not lower than 1 uF.
In a specific implementation, the primary winding L1 transmits a power supply voltage to the first auxiliary winding L, and the power supply voltage is output from a same-name terminal of the first auxiliary winding L, and the first diode LED1 rectifies the power supply voltage and transmits the rectified power supply voltage to the third pin of the power management integrated circuit U1.
Further, in order to provide the PWM chip U2 with instant high energy, the power management system further includes: a second capacitance C2; one end of the second capacitor C2 is connected to the second pin of the power management integrated circuit U1, and the other end of the second capacitor C2 is grounded.
The second capacitor C2 may be an electrolytic capacitor or an electrodeless capacitor.
Further, the power supply management system further includes: a secondary winding L2;
the primary winding L1 is further used for transmitting the power supply voltage to the secondary winding L2;
the dotted terminal of the secondary winding L2 is connected to the second pin of the PWM chip U2, the dotted terminal of the secondary winding L2 is further connected to a second diode LED2, the anode of the second diode LED2 is connected to the secondary winding L2, the cathode of the second diode LED2 is connected to a third capacitor C3, the other end of the third capacitor C3 is connected to the other end of the secondary winding L2, the cathode of the second diode LED2 is connected to a third resistor R3, the other end of the third resistor R3 is connected to the end of the third capacitor C3 close to the secondary winding L2, the end of the third resistor R3 far away from the second diode LED2 is further connected to a fourth resistor R4, and the other end of the fourth resistor R4 is connected to the power supply management integrated circuit U1.
In a specific implementation, the secondary winding L2 outputs the power supply voltage from the end of the secondary winding L2 with the same name as the end of the secondary winding L2 to the anode of the second diode LED2, and then from the cathode of the second diode LED2 through the third resistor R3.
In this embodiment, the third pin of the power management integrated circuit U1 receives a power supply voltage, and outputs the power supply voltage from the second pin of the power management integrated circuit U1 to the first pin of the PWM chip U2 when the power supply voltage is less than the reference voltage Vref; the primary winding L1 transmits a power supply voltage to the first auxiliary winding L, and the power supply voltage is output from the same name end of the first auxiliary winding L, and the first diode LED1 rectifies the power supply voltage and transmits the rectified power supply voltage to the third pin of the power supply management integrated circuit U1; the secondary winding L2 outputs the power supply voltage from the end of the secondary winding L2 having the same name as the power supply voltage to the anode of the second diode LED2, and then outputs the power supply voltage from the cathode of the second diode LED2 through the third resistor R3.
Further, when the supply voltage is higher due to a larger operating current of the PWM chip U2, the supply voltage received by the third pin of the power management integrated circuit U1 is increased, and in order to save the lower standby power consumption of the power management system, referring to fig. 4, fig. 4 is a circuit diagram of a second embodiment of the power management system according to the embodiment of the present invention.
As shown in fig. 4, based on the first embodiment, the power supply management system further includes: a second auxiliary winding L';
the dotted terminal of the second auxiliary winding L ' is connected to the other end of the first auxiliary winding L, the dotted terminal of the second auxiliary winding L ' is connected to the first pin of the PWM chip U2, and the other end of the second auxiliary winding L ' is grounded.
Note that, the dotted terminal of the second auxiliary winding L' is connected to the first pin of the PWM chip U2, and the position of the dotted terminal tap of the PWM chip U2 can be selected according to actual conditions.
In a specific implementation, when the power supply voltage exceeds the reference voltage Vref, no power supply voltage is output from the second pin of the power management integrated circuit U1, but the power supply voltage may be output from the second auxiliary winding L' to the second pin of the PWM chip U2, thereby preventing the power consumption of the power management integrated circuit U1 from being large.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power management integrated circuit, the power management integrated circuit comprising: the device comprises a switch module, a grid driving module and a comparison module;
the grid driving module is respectively connected with the switch module and the comparison module, and the switch module is respectively connected with a power supply and the PWM chip;
the comparison module is used for acquiring the power supply voltage output to the PWM chip by the switch module and stopping outputting a comparison signal to the grid drive module when the power supply voltage is smaller than a reference voltage;
the grid driving module is used for outputting a driving signal to the switch module when the comparison signal is not received;
and the switch module is used for transmitting the power supply voltage from the power supply to the PWM chip through the driving signal when the driving signal is received.
2. The power management integrated circuit of claim 1, wherein the switch module comprises: a field effect transistor;
the source electrode of the field effect tube is connected with the power supply, the grid electrode of the field effect tube is connected with the grid electrode driving module, the drain electrode of the field effect tube is connected with the comparison module, and the drain electrode of the field effect tube is further connected with the PWM chip.
3. The power management integrated circuit of claim 2, wherein the comparison module comprises: a comparator, a first resistor and a second resistor;
one end of the first resistor is connected with a drain electrode of the field effect transistor, the other end of the first resistor is connected with the second resistor, the other end of the second resistor is grounded, a first pin of the comparator is connected with the gate driving module, a second pin of the comparator is connected with one end, close to the second resistor, of the first resistor, and a fourth pin of the comparator is connected with one end, far away from the first resistor, of the second resistor.
4. The power management integrated circuit of claim 1, wherein the power management integrated circuit further comprises: a thermal shutdown module;
the thermal shutdown module is connected with the gate driving module;
the grid driving module is also used for outputting a temperature signal to the thermal shutoff module when the comparison signal is not received;
the thermal shutdown module is used for receiving the temperature signal and outputting a shutdown signal to the gate driving module when the temperature signal is greater than a reference temperature;
the gate driving module is further configured to stop transmitting the supply voltage from the power supply to the PWM chip through the turn-off signal when receiving the turn-off signal.
5. A power supply management system, characterized in that the power supply management system comprises: a PWM chip, a power supply source and a power management integrated circuit as claimed in any one of claims 1 to 4;
the power supply management integrated circuit comprises a first resistor, a second resistor, a field effect transistor, a power supply management integrated circuit, a PWM chip and a power supply, wherein one end of the second resistor, which is grounded, of the power supply management integrated circuit is a first pin, the drain electrode of the field effect transistor of the power supply management integrated circuit is a second pin, the source level of the field effect transistor of the power supply management integrated circuit is a third pin, the first pin of the power supply management integrated circuit is grounded, the second pin of the power supply management integrated circuit is connected with the first pin of the PWM chip, the third pin of the power supply management integrated circuit is connected with the power supply, and the second pin of the PWM chip is connected with the power supply;
the power supply is used for supplying the power supply voltage to the power supply management integrated circuit;
and the power supply management integrated circuit is used for receiving the power supply voltage and transmitting the power supply voltage to the PWM chip when the power supply voltage is smaller than the reference voltage.
6. The power management system of claim 5 wherein said power supply comprises: the secondary winding, the first auxiliary winding, the first diode and the first capacitor;
wherein the primary winding is configured to transmit the supply voltage to the first auxiliary winding;
the dotted terminal of the first auxiliary winding is connected with the anode of the first diode, the other end of the first auxiliary winding is grounded, the cathode of the first diode is connected with the third pin of the power supply management integrated circuit, the cathode of the first diode is connected with the first capacitor, and the other end of the first capacitor is grounded.
7. The power management system of claim 6 wherein the first capacitor has a capacitance value of no less than 1 uF.
8. The power management system of claim 7, further comprising: a second capacitor;
one end of the second capacitor is connected with a second pin of the power supply management integrated circuit, and the other end of the second capacitor is grounded.
9. The power management system of claim 8, further comprising: a secondary winding;
the primary winding is further used for transmitting the power supply voltage to the secondary winding;
the dotted terminal of the secondary winding is connected with the second pin of the PWM chip, the dotted terminal of the secondary winding is further connected with a second diode, the anode of the second diode is connected with the secondary winding, the cathode of the second diode is connected with a third capacitor, the other end of the third capacitor is connected with the other end of the secondary winding, the cathode of the second diode is connected with a third resistor, the other end of the third resistor is close to one end of the secondary winding, the third resistor is far away from one end of the second diode and is further connected with a fourth resistor, and the other end of the fourth resistor is connected with the power supply management integrated circuit.
10. The power management system of claim 9, further comprising: a second auxiliary winding;
the dotted terminal of the second auxiliary winding is connected with the other end of the first auxiliary winding, the dotted terminal of the second auxiliary winding is connected with the first pin of the PWM chip, and the other end of the second auxiliary winding is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211044624.4A CN115117857B (en) | 2022-08-30 | 2022-08-30 | Power supply management integrated circuit and power supply management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211044624.4A CN115117857B (en) | 2022-08-30 | 2022-08-30 | Power supply management integrated circuit and power supply management system |
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| Publication Number | Publication Date |
|---|---|
| CN115117857A true CN115117857A (en) | 2022-09-27 |
| CN115117857B CN115117857B (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211044624.4A Active CN115117857B (en) | 2022-08-30 | 2022-08-30 | Power supply management integrated circuit and power supply management system |
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| Country | Link |
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| CN (1) | CN115117857B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479314A (en) * | 1991-12-21 | 1995-12-26 | Vdo Adolf Schindling Ag | Circuit arrangement having a semiconductor switch for the switching of a load |
| CN203338345U (en) * | 2013-06-25 | 2013-12-11 | 四川品杰科技有限公司 | Tablet personal computer power port having overheating overvoltage protective function |
| CN203562941U (en) * | 2013-07-16 | 2014-04-23 | 西子电梯集团有限公司 | A switching power supply circuit with a driving chip power overvoltage protection function |
| CN205124062U (en) * | 2015-10-30 | 2016-03-30 | 上海晶丰明源半导体有限公司 | Starting circuit , LED driver and LED drive circuit of chip |
| CN107070236A (en) * | 2017-04-07 | 2017-08-18 | 苏州博创集成电路设计有限公司 | Switching power supply |
| CN107528294A (en) * | 2016-06-16 | 2017-12-29 | 恩智浦有限公司 | Power supply changeover device with load switch error protection |
| CN210137178U (en) * | 2019-08-12 | 2020-03-10 | 无锡博通微电子技术有限公司 | Switching power supply circuit with accurate voltage abnormity protection |
| US11289897B1 (en) * | 2021-08-30 | 2022-03-29 | Crane Electronics, Inc. | Radiation tolerant temperature compensated delayed undervoltage lockout and overvoltage shutdown |
-
2022
- 2022-08-30 CN CN202211044624.4A patent/CN115117857B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479314A (en) * | 1991-12-21 | 1995-12-26 | Vdo Adolf Schindling Ag | Circuit arrangement having a semiconductor switch for the switching of a load |
| CN203338345U (en) * | 2013-06-25 | 2013-12-11 | 四川品杰科技有限公司 | Tablet personal computer power port having overheating overvoltage protective function |
| CN203562941U (en) * | 2013-07-16 | 2014-04-23 | 西子电梯集团有限公司 | A switching power supply circuit with a driving chip power overvoltage protection function |
| CN205124062U (en) * | 2015-10-30 | 2016-03-30 | 上海晶丰明源半导体有限公司 | Starting circuit , LED driver and LED drive circuit of chip |
| CN107528294A (en) * | 2016-06-16 | 2017-12-29 | 恩智浦有限公司 | Power supply changeover device with load switch error protection |
| CN107070236A (en) * | 2017-04-07 | 2017-08-18 | 苏州博创集成电路设计有限公司 | Switching power supply |
| CN210137178U (en) * | 2019-08-12 | 2020-03-10 | 无锡博通微电子技术有限公司 | Switching power supply circuit with accurate voltage abnormity protection |
| US11289897B1 (en) * | 2021-08-30 | 2022-03-29 | Crane Electronics, Inc. | Radiation tolerant temperature compensated delayed undervoltage lockout and overvoltage shutdown |
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| Publication number | Publication date |
|---|---|
| CN115117857B (en) | 2022-11-18 |
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