CN111600479A - Power supply circuit suitable for aerospace application - Google Patents
Power supply circuit suitable for aerospace application Download PDFInfo
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- CN111600479A CN111600479A CN202010542147.9A CN202010542147A CN111600479A CN 111600479 A CN111600479 A CN 111600479A CN 202010542147 A CN202010542147 A CN 202010542147A CN 111600479 A CN111600479 A CN 111600479A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
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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
- H02M1/0009—Devices or circuits for detecting current in a converter
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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
- H02M1/0045—Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode
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Abstract
The invention discloses a power supply circuit suitable for aerospace application, which comprises a voltage input end, a 12V linear voltage stabilization block, a 5V linear voltage stabilization block, a 12V power utilization unit and a 5V power utilization unit, and further comprises a power resistor, a current sampling circuit and a voltage comparator circuit, wherein the power resistor is used for limiting the current of a rear-stage circuit of the power resistor, the current sampling circuit is used for collecting voltages at two ends of the power resistor and outputting a sampling voltage after amplification, and the voltage comparator is respectively connected with the output of the current sampling circuit and a preset reference voltage, compares the sampling voltage with the reference voltage and outputs a TTL level signal. The invention solves the problem that the linear voltage stabilizer module does not meet the first-level derating of aerospace components, improves the problem that the voltage stabilizer module generates heat seriously, and solves the problem of how to protect and detect when single-particle locking effect occurs on components of a circuit part. Compared with the DC/DC voltage stabilizer, the module has the advantages of smaller size, lighter weight, lower cost and better space environment adaptability.
Description
Technical Field
The present invention relates to power supply circuits, and particularly to a power supply circuit suitable for aerospace applications.
Background
With the improvement of the living standard of human beings, more and more electronic devices, such as household appliances, handheld electronic devices and the like, become an indispensable part in our lives. On the other hand, with the progress of science and technology, humans have begun to explore the mysterious space, and therefore, space electronic devices such as space ships, space stations, and communication satellites have also been rapidly developed.
However, the design of the power circuit is not required to be switched on whether the electronic equipment on the ground or the space electronic equipment is required to work normally. In particular, in electronic devices in the universe space, the power supply system must be designed to work normally, and the power consumption, heat dissipation, size, weight, space environment adaptability and other problems must be considered, so as to meet the requirements of long service life and high reliability. The power supply module commonly used in the current aerospace electronic equipment comprises a DC/DC power supply module and a linear voltage stabilizer module. The aerospace-grade DC/DC power supply module is very expensive and large in size, and certain switching noise exists in output; to meet EMC requirements, an expensive filter is also added, which undoubtedly adds significantly to the cost of some common commercial satellites.
In addition, the DC/DC power supply module is easy to be affected by high-energy particle bombardment in a space environment because the working principle of the DC/DC power supply module is a switch type. The aerospace-grade linear voltage regulator module is much cheaper than DC/DC, small in size, good in output stability and EMC (electro magnetic compatibility) characteristics and not easy to be influenced by space high-energy particle bombardment; however, the input voltage of the power supply is not too high, and the power supply is limited in use due to the derating problem and the temperature rise problem of components on occasions with +28V or +42V power supply voltage.
Therefore, under the condition that the power consumption is allowed, the demand for reducing the use of components and improving the temperature rise of the components is urgently needed; meanwhile, when the circuit has a single-particle locking effect, the current of the circuit can be limited, the circuit fault is detected, and a TTL telemetering signal is output, so that the space environment adaptability and the reliability of the circuit are improved.
Disclosure of Invention
The invention aims to provide a power supply circuit which solves the problems that the use of a linear voltage stabilizer module is limited in some high-supply-voltage occasions and the use of elements is derated, improves the temperature rise problem, reduces the size of a circuit board, reduces the cost, and improves the space environment adaptability and reliability of the circuit by detecting faults and outputting telemetering signals when the circuit has a single-event locking effect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a power supply circuit suitable for aerospace application comprises a voltage input end, a 12V linear voltage stabilization block, a 5V linear voltage stabilization block, a 12V power unit and a 5V power unit, wherein the 12V linear voltage stabilization block is connected with the 12V power unit to supply power for the 12V power unit, the 5V linear voltage stabilization block is connected with the 5V power unit to supply power for the 5V power unit, the voltage input end is sequentially connected with the 12V linear voltage stabilization block and the 5V linear voltage stabilization block in series through a power resistor, and the power supply circuit further comprises a current sampling circuit and a voltage comparator circuit;
the voltage input end is used for inputting 20V-50V voltage;
the circuit also comprises a power resistor, a current sampling circuit and a voltage comparator circuit;
the power resistor is positioned between the voltage input end and the 12V linear voltage stabilizing block and used for limiting the current of a rear-stage circuit, the current power consumption of the rear-stage circuit during normal work is Id, and the current output by the power resistor meets the tolerance range of 0.8Id-1.2Id of the power consumption of the rear-stage circuit;
the current sampling circuit is connected with the power resistor in parallel and is used for collecting voltages at two ends of the power resistor and outputting a sampling voltage after amplification;
and two input ends of the voltage comparator are respectively connected with the output of the current sampling circuit and a preset reference voltage, and are used for comparing the sampling voltage with the reference voltage and outputting a TTL level signal.
Preferably, the method comprises the following steps: the power resistor is one or more chip resistors.
Preferably, the method comprises the following steps: the current sampling circuit is a differential amplification circuit formed by two operational amplifiers U2A and U2B.
Preferably, the method comprises the following steps: the current sampling circuit comprises operational amplifiers U2A and U2B;
the forward input end of the U2A is divided into two paths, one path is connected with the power resistor through a resistor R11 and the other path is grounded through a resistor R13, the forward input end of the U2B is also divided into two paths, one path is connected with the other end of the power resistor through a resistor R10 and the other path is grounded through a resistor R12, and a resistor R9 is connected between the forward input ends of the U2A and the U2B;
the reverse input end of the U2A is divided into two paths, one path is connected with the output end of the U2B through a resistor R7, the other path is connected with the output end of the U2A through a first RC parallel circuit, the reverse input end of the U2B is divided into two paths, the other path is grounded through a resistor R5, and the other path is connected with the output end of the U2B through a second RC parallel circuit; the first RC parallel circuit is formed by a resistor R1 and a capacitor C1 which are connected in parallel, and the second RC parallel circuit is formed by a resistor R4 and a capacitor C2 which are connected in parallel;
the output end of the U2A is divided into two paths through a resistor R8, one path is grounded through a capacitor C7, the other path is connected with the input end of the voltage comparator circuit, the 4-pin of the U2A is grounded, the 8-pin is divided into two paths, the other path is connected with a 5V linear voltage stabilizing block, and the other path is grounded through a capacitor C4.
Preferably, the method comprises the following steps: the voltage comparator circuit comprises a voltage comparator U1A;
the positive phase input end of the U1A is connected with the output end of the current sampling circuit, the negative phase input end is divided into two paths, one path is connected with the 5V linear voltage-stabilizing block through a resistor R2, the other path is grounded through a resistor R3, two ends of the R3 are connected with a capacitor C5 in parallel, the 4 feet of the U1A are grounded, the 8 feet are divided into two paths, the other path is connected with the 5V linear voltage-stabilizing block, and the other path is grounded through a capacitor C3; the output end of the U1A outputs TTL level signals after passing through the resistor R6, and one end of the resistor R6 far away from the U1A is grounded through the capacitor C6.
Preferably, the method comprises the following steps: the model of the 12V linear voltage stabilizing block is JW7812U, and the model of the 5V linear voltage stabilizing block is JW 7805U.
Preferably, the method comprises the following steps: the models of the U2A and the U2B are ER 158.
Preferably, the method comprises the following steps: the model number of the voltage comparator U1A is MAX942 MSA.
In the invention: the power resistor may be one or more of series and parallel used, packaged as 2512, chip resistor rated at 1W, or other power resistor.
The 12V linear voltage stabilizing block is used for supplying power to a 12V power unit in the circuit, and a +12V linear voltage stabilizer can be selected.
And the 5V linear voltage stabilizing block is used for supplying power to a 5V power utilization unit in the circuit, and can select a +5V linear voltage stabilizer.
(1) The power resistor is additionally arranged, so that the current limiting device has the function of effectively limiting the current, and prevents the locking effect caused by the impact of high-energy particles on a rear-stage circuit part in a space environment so as to generate continuous large current; secondly, by monitoring the voltage of the power resistor, the purpose of monitoring the current can be achieved; thirdly, as the power resistor, the 12V linear voltage-stabilizing block and the 5V linear voltage-stabilizing block are connected in series electrically, the power resistor can share part of power dissipation, and the working temperature rise of the 12V linear voltage-stabilizing block is reduced; fourthly, the power resistor is divided into partial voltage drops, so that the input voltage of a 12V linear voltage stabilizing block at the rear stage is reduced, the input condition of the 12V linear voltage stabilizing block meets the requirement of first-stage derating, namely the input voltage cannot exceed 70% of the rated maximum input voltage value of the power voltage stabilizing module.
(2) The 12V linear voltage stabilization block and the 5V linear voltage stabilization block are adopted, firstly, compared with a DC/DC module, the output stability of the linear voltage stabilizer module is better, and no switching noise exists; secondly, the voltage stabilizing blocks adopt a bipolar process, so that the performance of radiation resistance and single event effect resistance is better, namely the space environment adaptability is better; third, the linear blocks are small in size, light in weight, and cheaper.
(3) The current sampling circuit comprises a differential amplification circuit consisting of operational amplifiers U2A, U2B and peripheral resistor and capacitors, and is used for collecting and differentially amplifying voltages at two ends of the power resistor 1, wherein when the current consumed by the circuit is larger, the voltages at two ends of the power resistor 1 are larger, the differentially amplified voltages are higher, and the differentially amplified voltages are output.
(4) And the voltage comparator circuit is used for receiving the output of the current sampling circuit 6 and outputting a corresponding TTL telemetering signal.
Compared with the prior art, the invention has the advantages that:
(1) the power circuit does not use a DC/DC voltage stabilizer module and an EMC filter module, can realize the use under the occasion of high supply voltage by only using a linear voltage stabilizer module and a power resistor under the condition of meeting the power requirement, and has the advantages of good heat dissipation, small size, light weight, good power output quality, no switching noise, better space adaptability and reliability, and the space adaptability mainly refers to radiation resistance and high-energy particle impact resistance.
(2) The current sampling circuit and the voltage comparator circuit can monitor circuit current, when a rear-stage circuit is short-circuited or has large current due to an emergency situation such as a space single event locking effect, the voltage at two ends of the power resistor is increased, the output of the current sampling circuit is also increased, when the output of the current sampling circuit is increased to a certain value, the output of the voltage comparator circuit is changed, the output change can be used as a telemetering signal to be sent to an upper-layer system, and after the upper-layer system identifies the abnormality, corresponding measures can be taken.
(3) The circuit has a simple structure, can realize the detection and remote measurement of abnormal current through the cooperative work of all parts, and has the advantages of good heat dissipation, good stability, small size, light weight, low price and higher reliability.
In conclusion, the invention provides a reliable design method for solving the limitation of the linear voltage stabilizer module in the use of the linear voltage stabilizer module in the occasions, and under the condition of allowing power consumption, the derating use of components can be met, and the temperature rise problem of the components can be improved; meanwhile, when the circuit has a single event locking effect, the invention can limit the circuit current, detect the circuit fault and output TTL telemetering signals, thereby improving the space environment adaptability and reliability of the circuit.
Drawings
FIG. 1 is a schematic block diagram of the circuit of the present invention;
FIG. 2 is a circuit diagram of a voltage comparator circuit according to the present invention;
fig. 3 is a circuit diagram of the current sampling circuit according to the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1: referring to fig. 1 to 3, a power supply circuit suitable for aerospace application comprises a voltage input end, a 12V linear voltage stabilization block, a 5V linear voltage stabilization block, a 12V power utilization unit and a 5V power utilization unit, wherein the 12V linear voltage stabilization block is connected with the 12V power utilization unit to supply power for the power supply block, the 5V linear voltage stabilization block is connected with the 5V power utilization unit to supply power for the power supply block, the voltage input end is sequentially connected in series with the 12V linear voltage stabilization block and the 5V linear voltage stabilization block through a power resistor, and the power supply circuit further comprises a current sampling circuit and a voltage comparator circuit;
the voltage input end is used for inputting 20V-50V voltage;
the circuit also comprises a power resistor, a current sampling circuit and a voltage comparator circuit;
the power resistor is positioned between the voltage input end and the 12V linear voltage stabilizing block and used for limiting the current of a rear-stage circuit, the current power consumption of the rear-stage circuit during normal work is Id, and the current output by the power resistor meets the tolerance range of 0.8Id-1.2Id of the power consumption of the rear-stage circuit;
the current sampling circuit is connected with the power resistor in parallel and is used for collecting voltages at two ends of the power resistor and outputting a sampling voltage after amplification;
and two input ends of the voltage comparator are respectively connected with the output of the current sampling circuit and a preset reference voltage, and are used for comparing the sampling voltage with the reference voltage and outputting a TTL level signal.
Example 2: referring to fig. 1 to fig. 3, this embodiment 2 is a partial improvement on embodiment 1, in which the power resistor is one or more chip resistors, and the current sampling circuit is a differential amplifier circuit formed by two operational amplifiers U2A and U2B. The current sampling circuit comprises operational amplifiers U2A and U2B;
the forward input end of the U2A is divided into two paths, one path is connected with the power resistor through a resistor R11 and the other path is grounded through a resistor R13, the forward input end of the U2B is also divided into two paths, one path is connected with the other end of the power resistor through a resistor R10 and the other path is grounded through a resistor R12, and a resistor R9 is connected between the forward input ends of the U2A and the U2B;
the reverse input end of the U2A is divided into two paths, one path is connected with the output end of the U2B through a resistor R7, the other path is connected with the output end of the U2A through a first RC parallel circuit, the reverse input end of the U2B is divided into two paths, the other path is grounded through a resistor R5, and the other path is connected with the output end of the U2B through a second RC parallel circuit; the first RC parallel circuit is formed by a resistor R1 and a capacitor C1 which are connected in parallel, and the second RC parallel circuit is formed by a resistor R4 and a capacitor C2 which are connected in parallel;
the output end of the U2A is divided into two paths through a resistor R8, one path is grounded through a capacitor C7, the other path is connected with the input end of the voltage comparator circuit, the 4-pin of the U2A is grounded, the 8-pin is divided into two paths, the other path is connected with a 5V linear voltage stabilizing block, and the other path is grounded through a capacitor C4.
The voltage comparator circuit comprises a voltage comparator U1A; the positive phase input end of the U1A is connected with the output end of the current sampling circuit, the negative phase input end is divided into two paths, one path is connected with the 5V linear voltage-stabilizing block through a resistor R2, the other path is grounded through a resistor R3, two ends of the R3 are connected with a capacitor C5 in parallel, the 4 feet of the U1A are grounded, the 8 feet are divided into two paths, the other path is connected with the 5V linear voltage-stabilizing block, and the other path is grounded through a capacitor C3; the output end of the U1A outputs TTL level signals after passing through the resistor R6, and one end of the resistor R6 far away from the U1A is grounded through the capacitor C6.
The model of the 12V linear voltage stabilizing block is JW7812U, and the model of the 5V linear voltage stabilizing block is JW 7805U.
The models of the U2A and the U2B are ER 158.
The model number of the voltage comparator U1A is MAX942 MSA.
Example 3: with reference to fig. 1 to 3, for better illustrating the present invention, we define on the basis of example 1.
Referring to fig. 3, where R4= R7, R1= R5, R10= R11, R12= R13, and R4= R7, where the current sampling circuit is connected in parallel to the voltage at two terminals of the power resistor, we denote by Vx1, Vx2, respectively, the voltage at the output terminal, denoted by Vout1, Vout1= (Vx 2-Vx 1) (R4 + R5)/R4.
Assuming that the current consumed by the 5V power consumption unit is Ia =20mA, the current consumed by the 12V power consumption unit is Ib =30mA, and the resistance of the power resistor is 100 Ω, according to fig. 1, the input voltage is +28V, the current flowing through the 5V linear regulator block is Ia =20mA, the current flowing through the 12V linear regulator block is Ic =50mA, the current flowing through the power resistor is Id =50mA, the voltage borne by the power resistor is 100 Ω 50mA =5V, the borne power consumption is 5V 50mA =250mW, the input voltage of the 12V linear regulator block is 28V-5V =23V, and the borne power consumption is (23V-12V) × 50mA =550 mA.
Therefore, when the power resistor works normally, a part of voltage is shared to bear a part of power consumption, the input voltage of the 12V linear voltage stabilizing block and the heating power consumption of the 12V linear voltage stabilizing block can be effectively reduced, the larger derating of the input voltage of the 12V linear voltage stabilizing block and the reduction of the working temperature rise are realized, and the reliability of the circuit is improved. On the other hand, in an aerospace environment, assuming that a 5V electric unit is affected by high-energy particle impact and has a single event locking effect, and the operating current is increased from 20mA to 50mA, Ia =50mA, Ib =30mA, Ic =80mA, Id =80mA, the withstand voltage on the power resistor is 100 Ω 80mA =8V, and the voltage on the power resistor is changed from 5V to 8V, so that the output of the current sampling circuit changes, and when the change reaches a certain value, the value can be adjusted by R2 and R3 in the voltage comparator circuit, the output of the voltage comparator circuit also changes, and the change is output to an upper system as a telemetry signal, and the upper system can judge whether an overcurrent fault occurs according to the signal and perform corresponding processing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a power supply circuit suitable for space flight is used, includes voltage input end, 12V linear voltage stabilization block, 5V linear voltage stabilization block, 12V power consumption unit and 5V power consumption unit, 12V linear voltage stabilization block is connected 12V power consumption unit and is its power supply, 5V linear voltage stabilization block is connected 5V power consumption unit and is its power supply, its characterized in that: the voltage input end is sequentially connected in series with a 12V linear voltage stabilizing block and a 5V linear voltage stabilizing block through a power resistor, and the voltage input end further comprises a current sampling circuit and a voltage comparator circuit;
the voltage input end is used for inputting 20V-50V voltage;
the circuit also comprises a power resistor, a current sampling circuit and a voltage comparator circuit;
the power resistor is positioned between the voltage input end and the 12V linear voltage stabilizing block and used for limiting the current of a rear-stage circuit, the current power consumption of the rear-stage circuit during normal work is Id, and the current output by the power resistor meets the tolerance range of 0.8Id-1.2Id of the power consumption of the rear-stage circuit;
the current sampling circuit is connected with the power resistor in parallel and is used for collecting voltages at two ends of the power resistor and outputting a sampling voltage after amplification;
and two input ends of the voltage comparator are respectively connected with the output of the current sampling circuit and a preset reference voltage, and are used for comparing the sampling voltage with the reference voltage and outputting a TTL level signal.
2. A power supply circuit suitable for aerospace applications as claimed in claim 1, wherein: the power resistor is one or more chip resistors.
3. A power supply circuit suitable for aerospace applications as claimed in claim 1, wherein: the current sampling circuit is a differential amplification circuit formed by two operational amplifiers U2A and U2B.
4. A power supply circuit suitable for aerospace applications as claimed in claim 3, wherein: the current sampling circuit comprises operational amplifiers U2A and U2B;
the forward input end of the U2A is divided into two paths, one path is connected with the power resistor through a resistor R11 and the other path is grounded through a resistor R13, the forward input end of the U2B is also divided into two paths, one path is connected with the other end of the power resistor through a resistor R10 and the other path is grounded through a resistor R12, and a resistor R9 is connected between the forward input ends of the U2A and the U2B;
the reverse input end of the U2A is divided into two paths, one path is connected with the output end of the U2B through a resistor R7, the other path is connected with the output end of the U2A through a first RC parallel circuit, the reverse input end of the U2B is divided into two paths, the other path is grounded through a resistor R5, and the other path is connected with the output end of the U2B through a second RC parallel circuit; the first RC parallel circuit is formed by a resistor R1 and a capacitor C1 which are connected in parallel, and the second RC parallel circuit is formed by a resistor R4 and a capacitor C2 which are connected in parallel;
the output end of the U2A is divided into two paths through a resistor R8, one path is grounded through a capacitor C7, the other path is connected with the input end of the voltage comparator circuit, the 4-pin of the U2A is grounded, the 8-pin is divided into two paths, the other path is connected with a 5V linear voltage stabilizing block, and the other path is grounded through a capacitor C4.
5. A power supply circuit suitable for aerospace applications as claimed in claim 4, wherein: the voltage comparator circuit comprises a voltage comparator U1A;
the positive phase input end of the U1A is connected with the output end of the current sampling circuit, the negative phase input end is divided into two paths, one path is connected with the 5V linear voltage-stabilizing block through a resistor R2, the other path is grounded through a resistor R3, two ends of the R3 are connected with a capacitor C5 in parallel, the 4 feet of the U1A are grounded, the 8 feet are divided into two paths, the other path is connected with the 5V linear voltage-stabilizing block, and the other path is grounded through a capacitor C3; the output end of the U1A outputs TTL level signals after passing through the resistor R6, and one end of the resistor R6 far away from the U1A is grounded through the capacitor C6.
6. A power supply circuit suitable for aerospace applications as claimed in claim 1, wherein: the model of the 12V linear voltage stabilizing block is JW7812U, and the model of the 5V linear voltage stabilizing block is JW 7805U.
7. A power supply circuit suitable for aerospace applications according to claim 3 or 4, wherein: the models of the U2A and the U2B are ER 158.
8. A power supply circuit suitable for aerospace applications as claimed in claim 5, wherein: the model number of the voltage comparator U1A is MAX942 MSA.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803720A (en) * | 2021-03-19 | 2021-05-14 | 中国电子科技集团公司第九研究所 | Power supply voltage monitoring circuit of multi-power supply system |
| CN115102367A (en) * | 2022-07-03 | 2022-09-23 | 上海速仁电子科技发展有限公司 | Chip for intelligent power supply controller and control method |
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| CN112803720A (en) * | 2021-03-19 | 2021-05-14 | 中国电子科技集团公司第九研究所 | Power supply voltage monitoring circuit of multi-power supply system |
| CN112803720B (en) * | 2021-03-19 | 2021-06-22 | 中国电子科技集团公司第九研究所 | Power supply voltage monitoring circuit of multi-power supply system |
| CN115102367A (en) * | 2022-07-03 | 2022-09-23 | 上海速仁电子科技发展有限公司 | Chip for intelligent power supply controller and control method |
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| CN111600479B (en) | 2024-09-03 |
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