CN114337212B - Power supply device for suppressing transient voltage - Google Patents
Power supply device for suppressing transient voltage Download PDFInfo
- Publication number
- CN114337212B CN114337212B CN202011050034.3A CN202011050034A CN114337212B CN 114337212 B CN114337212 B CN 114337212B CN 202011050034 A CN202011050034 A CN 202011050034A CN 114337212 B CN114337212 B CN 114337212B
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- power supply
- sub
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
本发明公开了一种抑制瞬时电压的电源供应装置，应用于一输入电压，该抑制瞬时电压的电源供应装置包含一电源供应电路、一回授信号产生电路及一回授信号控制电路。如果该电源供应电路停止接收该输入电压，则该回授信号控制电路控制该回授信号产生电路放电以使该回授信号产生电路控制该电源供应电路以减小一输出电压，使得当该电源供应电路再度接收该输入电压时，该电源供应电路避免对该输出电压产生一输出过电压状况。
The present invention discloses a power supply device for suppressing transient voltage, which is applied to an input voltage. The power supply device for suppressing transient voltage comprises a power supply circuit, a feedback signal generating circuit and a feedback signal control circuit. If the power supply circuit stops receiving the input voltage, the feedback signal control circuit controls the feedback signal generating circuit to discharge so that the feedback signal generating circuit controls the power supply circuit to reduce an output voltage, so that when the power supply circuit receives the input voltage again, the power supply circuit avoids generating an output overvoltage condition for the output voltage.
Description
Technical Field
The present invention relates to a power supply device, and more particularly to a power supply device for suppressing transient voltage.
Background
The related art power supply circuit receives an input voltage to convert the input voltage into an output voltage, and the related art power supply circuit can utilize a related art feedback signal generating circuit to feedback control the output voltage, and generally, the related art feedback signal generating circuit can comprise a related art operational amplifier and a related art reference voltage source, wherein the related art operational amplifier is electrically connected to the related art reference voltage source, and the related art operational amplifier compares a voltage division of the output voltage with a reference voltage of the related art reference voltage source to feedback control the output voltage, so that the related art power supply circuit can generate stable output voltage.
If the related art power supply circuit stops receiving the input voltage, the related art feedback signal generating circuit detects the decrease of the output voltage, so that the related art feedback signal generating circuit controls the related art power supply circuit to request the related art power supply circuit to increase the output voltage, and if the related art operational amplifier is still operated to request the related art power supply circuit to increase the output voltage during the period that the related art power supply circuit stops receiving the input voltage, the output voltage generates an output overvoltage condition when the related art power supply circuit receives the input voltage again, especially when the related art power supply circuit is in a light load state or an no load state.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a power supply device that suppresses an instantaneous voltage.
In order to achieve the above object, the instant voltage suppressing power supply device of the present invention is applied to an input voltage, and comprises a power supply circuit, a feedback signal generating circuit electrically connected to the power supply circuit, and a feedback signal control circuit electrically connected to the power supply circuit and the feedback signal generating circuit, wherein if the power supply circuit stops receiving the input voltage, the feedback signal control circuit controls the feedback signal generating circuit to discharge so that the feedback signal generating circuit controls the power supply circuit to reduce an output voltage, such that when the power supply circuit receives the input voltage again, the power supply circuit avoids generating an output overvoltage condition for the output voltage.
In one embodiment of the power supply device for suppressing transient voltage according to the present invention, the power supply circuit includes an auxiliary voltage generating sub-circuit electrically connected to the feedback signal control circuit.
Furthermore, in one embodiment of the power supply device for suppressing transient voltage according to the present invention, the feedback signal control circuit includes a voltage detection sub-circuit electrically connected to the auxiliary voltage generation sub-circuit.
In addition, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the feedback signal control circuit further comprises a voltage adjustment sub-circuit electrically connected to the power supply circuit, the feedback signal generating circuit and the voltage detection sub-circuit, wherein if the power supply circuit stops receiving the input voltage, the voltage detection sub-circuit detects that the auxiliary voltage generating sub-circuit stops generating an auxiliary voltage and the voltage detection sub-circuit notifies the voltage adjustment sub-circuit that the auxiliary voltage generating sub-circuit stops generating the auxiliary voltage, so that the voltage adjustment sub-circuit controls the feedback signal generating circuit to discharge.
In addition, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the feedback signal generating circuit includes a reference voltage source electrically connected to the voltage adjusting sub-circuit, wherein when the voltage adjusting sub-circuit controls the feedback signal generating circuit to discharge, the voltage adjusting sub-circuit outputs a low voltage to the reference voltage source, so that the reference voltage source stops working.
In addition, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the voltage detection sub-circuit includes a first zener diode electrically connected to the auxiliary voltage generation sub-circuit and the voltage adjustment sub-circuit, and a first resistor electrically connected to the first zener diode and the voltage adjustment sub-circuit.
Furthermore, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the voltage adjusting sub-circuit includes a first diode electrically connected to the first zener diode and the first resistor, a second diode electrically connected to the first diode and the reference voltage source, and a second resistor electrically connected to the feedback signal generating circuit, the first diode and the second diode.
In addition, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the feedback signal generating circuit further includes an operational amplifier electrically connected to the reference voltage source and the second resistor, and a feedback sub-circuit electrically connected to the operational amplifier and the power supply circuit, wherein the operational amplifier includes an operational amplifier output terminal, an operational amplifier inverting input terminal and an operational amplifier non-inverting input terminal, the operational amplifier output terminal is electrically connected to the feedback sub-circuit, and the operational amplifier non-inverting input terminal is electrically connected to the reference voltage source.
In addition, in an embodiment of the power supply device for suppressing transient voltage according to the present invention, the feedback signal generating circuit further includes a first voltage dividing resistor electrically connected to the power supply circuit, the second resistor, the inverting input terminal of the operational amplifier and the feedback sub-circuit, and a second voltage dividing resistor electrically connected to the first voltage dividing resistor and the inverting input terminal of the operational amplifier, wherein when the reference voltage source stops working, a first voltage of the non-inverting input terminal of the operational amplifier is smaller than a first voltage divided between the first voltage dividing resistor and the second voltage dividing resistor, so that the operational amplifier controls the power supply circuit through the output terminal of the operational amplifier and the feedback sub-circuit to reduce the output voltage.
In an embodiment of the power supply device for suppressing transient voltage according to the present invention, the power supply circuit further includes a pwm control sub-circuit electrically connected to the feedback sub-circuit, a power switch electrically connected to the pwm control sub-circuit, a transformer electrically connected to the power switch and the auxiliary voltage generating sub-circuit, a rectifying and filtering circuit electrically connected to the transformer, the feedback sub-circuit, the first voltage dividing resistor and the second resistor, and an output capacitor electrically connected to the first voltage dividing resistor, the second resistor, the rectifying and filtering circuit and the feedback sub-circuit.
The invention has the effect that if the feedback signal generating circuit still works during the period that the power supply circuit stops receiving the input voltage, the power supply circuit can avoid generating the output overvoltage condition when the power supply circuit receives the input voltage again. Furthermore, in one embodiment of the present invention, if the operational amplifier is still operating during the period when the power supply circuit is stopped receiving the input voltage, the power supply circuit can avoid generating the output overvoltage condition when the power supply circuit is receiving the input voltage again, especially when the power supply circuit is in a light load state or a no load state, wherein if the operational amplifier is still operating during the period when the power supply circuit is stopped receiving the input voltage, the operational amplifier is forced to control the pwm control sub-circuit through the output terminal of the operational amplifier and the feedback sub-circuit to reduce the output voltage.
For a further understanding of the technology, means, and efficacy of the present invention, reference should be made to the following detailed description of the invention and to the accompanying drawings, which are included to provide a further understanding of the invention, and to the specific features and aspects of the invention, however, are given by way of illustration and not limitation.
Drawings
FIG. 1 is a block diagram of a power supply device for suppressing transient voltage according to a first embodiment of the present invention;
fig. 2 is a circuit block diagram of a power supply device for suppressing transient voltage according to a second embodiment of the present invention.
Symbol description in the drawings:
A power supply device for suppressing the instantaneous voltage;
20, a power supply circuit;
30 a feedback signal generating circuit;
40, feedback signal control circuit;
50, inputting voltage;
60, outputting voltage;
202, a pulse width modulation control sub-circuit;
204, a power switch;
206, a transformer;
208, rectifying and filtering loop;
an auxiliary voltage generation sub-circuit 210;
212, output end capacitance;
214 auxiliary voltage;
302, a reference voltage source;
306 an operational amplifier;
308, an operational amplifier output end;
An inverting input of the operational amplifier 310;
312, the non-inverting input of the operational amplifier;
314 a first voltage dividing resistor;
316, a second voltage dividing resistor;
a feedback sub-circuit 318;
320 a first voltage;
322 a first partial pressure;
328 reference voltage;
a voltage detection sub-circuit 402;
404 a voltage regulation subcircuit;
406, low voltage;
a first zener diode 410;
412 a first resistor;
414 a first diode;
416 a second diode;
420 a second resistor;
424 high voltage.
Detailed Description
In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention, however, it will be appreciated by those skilled in the art that the invention may be practiced without one or more of these specific details, and that in other cases well-known details are not shown or described to avoid obscuring the main features of the invention. The technical content and detailed description of the present invention are as follows in conjunction with the drawings:
Referring to fig. 1, a block diagram of a power supply device for suppressing transient voltage according to a first embodiment of the invention is shown. The invention relates to a power supply device 10 for suppressing transient voltage, which is applied to an input voltage 50, wherein the power supply device 10 for suppressing transient voltage comprises a power supply circuit 20, a feedback signal generating circuit 30 and a feedback signal control circuit 40, and the components are electrically connected with each other. If the power supply circuit 20 stops receiving the input voltage 50, the feedback signal control circuit 40 controls the feedback signal generating circuit 30 to discharge so that the feedback signal generating circuit 30 controls the power supply circuit 20 to reduce an output voltage 60, such that the power supply circuit 20 avoids generating an output overvoltage condition to the output voltage 60 when the power supply circuit 20 receives the input voltage 50 again.
Furthermore, the input voltage 50 may be a direct current voltage or an alternating current voltage. The power supply circuit 20 is configured to convert the input voltage 50 into the output voltage 60, and the power supply circuit 20 may be a power supply, but the invention is not limited thereto. The feedback signal generating circuit 30 is configured to detect the output voltage 60 to control the power supply circuit 20 to feedback-control the output voltage 60, and the feedback signal generating circuit 30 may be a feedback signal generator, but the invention is not limited thereto. The feedback signal control circuit 40 may be a feedback signal controller, but the invention is not limited thereto. The power supply circuit 20 stops receiving the input voltage 50 and can power off the input voltage 50, but the invention is not limited thereto.
Furthermore, the feedback signal control circuit 40 is configured to detect an auxiliary voltage 214 provided by the power supply circuit 20, generate and transmit a high voltage 424 to the feedback signal generating circuit 30 to enable the feedback signal generating circuit 30 to operate normally (i.e., the feedback signal generating circuit 30 detects the output voltage 60 to control the power supply circuit 20 to feedback control the output voltage 60), generate and transmit a low voltage 406 to the feedback signal generating circuit 30 if the auxiliary voltage 214 is present (i.e., the power supply circuit 20 stops receiving the input voltage 50, the feedback signal control circuit 40 stops receiving the auxiliary voltage 214), and prevent the feedback signal generating circuit 30 from being discharged to require the power supply circuit 20 to increase the output voltage 60 if the auxiliary voltage 214 is not present (i.e., the power supply circuit 20 stops receiving the input voltage 50, the feedback signal control circuit 40 stops receiving the auxiliary voltage 214).
Please refer to fig. 2, which is a circuit block diagram of a power supply device for suppressing transient voltage according to a second embodiment of the present invention, wherein the components shown in fig. 2 are the same as those shown in fig. 1, so that the description thereof will not be repeated here for brevity. The power supply circuit 20 comprises a pwm control sub-circuit 202, a power switch 204, a transformer 206, a rectifying and filtering circuit 208, an auxiliary voltage generating sub-circuit 210 and an output end capacitor 212, the feedback signal generating circuit 30 comprises a reference voltage source 302, the operational amplifier 306, a first voltage dividing resistor 314, a second voltage dividing resistor 316 and a feedback sub-circuit 318, the feedback signal control circuit 40 comprises a voltage detecting sub-circuit 402 and a voltage adjusting sub-circuit 404, the operational amplifier 306 comprises an operational amplifier output end 308, an operational amplifier inverting input end 310 and an operational amplifier non-inverting input end 312, the voltage detecting sub-circuit 402 comprises a first zener diode 410 and a first resistor 412, the voltage adjusting sub-circuit 404 comprises a first diode 414, a second diode 416 and a second resistor 420, and the above components are electrically connected to each other.
If the power supply circuit 20 stops receiving the input voltage 50, the voltage detection sub-circuit 402 detects that the auxiliary voltage generation sub-circuit 210 stops generating the auxiliary voltage 214 and the voltage detection sub-circuit 402 informs the voltage adjustment sub-circuit 404 that the auxiliary voltage generation sub-circuit 210 stops generating the auxiliary voltage 214, such that the voltage adjustment sub-circuit 404 outputs the low voltage 406 to the reference voltage source 302 such that the reference voltage source 302 stops operating and a first voltage 320 of the op amp non-inverting input 312 is less than a first voltage division 322 between the first voltage division resistor 314 and the second voltage division resistor 316 such that the op amp 306 controls the power supply circuit 20 via the op amp output 308 and the feedback sub-circuit 318 to reduce the output voltage 60.
Wherein if the power supply circuit 20 stops receiving the input voltage 50, then:
an anode voltage of the first diode 414= [ the output voltage 60 x a first resistance value of the first resistor 412/(the first resistance value of the first resistor 412+a second resistance value of the second resistor 420) ]+a first barrier voltage of the first diode 414
The low voltage 406=the anode voltage of the first diode 414-a second barrier voltage of the second diode 416= [ the output voltage 60×the first resistance value of the first resistor 412/(the first resistance value of the first resistor 412+the second resistance value of the second resistor 420) ]+the first barrier voltage of the first diode 414-the second barrier voltage of the second diode 416 ]
If the first barrier voltage of the first diode 414 is equal to the second barrier voltage of the second diode 416 (e.g., 0.7 volts), then:
The low voltage 406=the output voltage 60×the first resistance value of the first resistor 412/(the first resistance value of the first resistor 412+the second resistance value of the second resistor 420)
The reference voltage source 302 may be a zener diode, a buck integrated circuit, a current source circuit, or a voltage divider circuit similar to the voltage divider circuit including the first voltage divider resistor 314 and the second voltage divider resistor 316, but the invention is not limited thereto, and the first resistor 412 and the second resistor 420 may be appropriately designed (e.g., the first resistance of the first resistor 412 is smaller) such that the low voltage 406 is sufficiently small that the reference voltage source 302 stops providing a reference voltage 328 to the non-inverting input 312 of the op-amp (i.e., the reference voltage source 302 stops operating). If the power supply circuit 20 stops receiving the input voltage 50, the output voltage 60 is provided by the output capacitor 212 and gradually decreases.
Furthermore, if the power supply circuit 20 receives the input voltage 50, the voltage detection sub-circuit 402 detects that the auxiliary voltage generation sub-circuit 210 generates the auxiliary voltage 214 and the voltage detection sub-circuit 402 informs the voltage adjustment sub-circuit 404 that the auxiliary voltage generation sub-circuit 210 generates the auxiliary voltage 214 such that the voltage adjustment sub-circuit 404 outputs the high voltage 424 to the reference voltage source 302 such that the reference voltage source 302 provides the reference voltage 328 to the op amp non-inverting input 312 such that the op amp 306 can operate normally.
Wherein if the power supply circuit 20 receives the input voltage 50, then:
A first voltage across the first resistor 412 = the auxiliary voltage 214-a second voltage across the first zener diode 410
The anode voltage of the first diode 414=the first voltage across the first resistor 412+the first barrier voltage of the first diode 414=the auxiliary voltage 214-the second voltage across the first zener diode 410+the first barrier voltage of the first diode 414
The high voltage 424 = the anode voltage of the first diode 414-the second barrier voltage of the second diode 416 = the auxiliary voltage 214-the second voltage across the first zener diode 410 + the first barrier voltage of the first diode 414-the second barrier voltage of the second diode 416
If the first barrier voltage of the first diode 414 is equal to the second barrier voltage of the second diode 416 (e.g., 0.7 volts), then:
The high voltage 424 = the auxiliary voltage 214-the second voltage across the first zener diode 410
For example, if the auxiliary voltage 214 is 10 volts and if the second voltage across (i.e., the breakdown voltage) of the first zener diode 410 is 7.5 volts, the high voltage 424 is 2.5 volts, and if the reference voltage source 302 is a zener diode having a breakdown voltage of 1.25 volts, the high voltage 424 (2.5 volts) delivered to the reference voltage source 302 will cause the reference voltage source 302 to provide the reference voltage 328 (1.25 volts) to the op-amp non-inverting input 312, so that the op-amp 306 can operate normally.
Furthermore, the operational amplifier 306 can operate normally, in which if the first voltage 320 at the non-inverting input 312 of the operational amplifier is less than the first voltage division 322 between the first voltage division resistor 314 and the second voltage division resistor 316, the operational amplifier 306 controls the pwm control sub-circuit 202 to decrease a turn-on rate of the power switch 204 to decrease the output voltage 60 through the operational amplifier output 308 and the feedback sub-circuit 318, and if the first voltage 320 at the non-inverting input 312 of the operational amplifier is greater than the first voltage division 322 between the first voltage division resistor 314 and the second voltage division resistor 316, the operational amplifier 306 controls the pwm control sub-circuit 202 to increase the turn-on rate of the power switch 204 to increase the output voltage 60 through the operational amplifier output 308 and the feedback sub-circuit 318.
Furthermore, one end of the first zener diode 410 is connected to the auxiliary voltage generating sub-circuit 210, the other end of the first zener diode 410 is connected to the voltage adjusting sub-circuit 404, one end of the first resistor 412 is connected to the voltage adjusting sub-circuit 404 and the other end of the first zener diode 410, the other end of the first resistor 412 is connected to ground, one end of the first diode 414 is connected to the other end of the first zener diode 410 and one end of the first resistor 412, one end of the second diode 416 is connected to the other end of the first diode 414, the other end of the second diode 416 is connected to the reference voltage source 302, one end of the second resistor 420 is connected to the feedback signal generating circuit 30, and the other end of the second resistor 420 is connected to the other end of the first diode 414 and one end of the second diode 416.
The present invention has the effect that if the feedback signal generating circuit 30 is still operating during the period when the power supply circuit 20 stops receiving the input voltage 50, the power supply circuit 20 can avoid generating the output overvoltage condition when the power supply circuit 20 receives the input voltage 50 again. Furthermore, in one embodiment of the present invention, if the operational amplifier 306 is still operating during the period when the power supply circuit 20 stops receiving the input voltage 50, the power supply circuit 20 can avoid generating the output over-voltage condition when the power supply circuit 20 receives the input voltage 50 again, especially when the power supply circuit 20 is in the light load state or the no-load state, wherein if the operational amplifier 306 is still operating during the period when the power supply circuit 20 stops receiving the input voltage 50, the operational amplifier 306 is forced to control the pwm control sub-circuit 202 through the operational amplifier output 308 and the feedback sub-circuit 318 to reduce the output voltage 60.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, i.e. the invention is not limited to the specific embodiments described herein, but is to be accorded the full scope of the claims. The present invention is capable of other and further embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A power supply device for suppressing transient voltage, which is applied to an input voltage, characterized in that the power supply device for suppressing transient voltage comprises:
a power supply circuit;
a feedback signal generating circuit electrically connected to the power supply circuit, and
A feedback signal control circuit electrically connected to the power supply circuit and the feedback signal generating circuit,
Wherein if the power supply circuit stops receiving the input voltage, the feedback signal control circuit controls the feedback signal generating circuit to discharge so that the feedback signal generating circuit controls the power supply circuit to reduce an output voltage, so that when the power supply circuit receives the input voltage again, the power supply circuit avoids generating an output overvoltage condition for the output voltage;
Wherein the power supply circuit comprises:
An auxiliary voltage generating sub-circuit electrically connected to the feedback signal control circuit;
wherein the feedback signal control circuit comprises:
A voltage detection sub-circuit electrically connected to the auxiliary voltage generation sub-circuit, and
A voltage adjusting sub-circuit electrically connected to the power supply circuit, the feedback signal generating circuit and the voltage detecting sub-circuit;
wherein the voltage detection sub-circuit comprises:
A first zener diode electrically connected to the auxiliary voltage generation sub-circuit and the voltage adjustment sub-circuit, and
The first resistor is electrically connected to the first Zener diode and the voltage regulating sub-circuit;
wherein the voltage adjustment sub-circuit comprises:
The first diode is electrically connected to the first Zener diode and the first resistor;
a second diode electrically connected to the first diode and the reference voltage source, and
A second resistor electrically connected to the feedback signal generating circuit, the first diode and the second diode;
If the power supply circuit stops receiving the input voltage, the voltage detection sub-circuit detects that the auxiliary voltage generation sub-circuit stops generating an auxiliary voltage and the voltage detection sub-circuit informs the voltage adjustment sub-circuit that the auxiliary voltage generation sub-circuit stops generating the auxiliary voltage, so that the voltage adjustment sub-circuit controls the feedback signal generation circuit to discharge.
2. The power supply device for suppressing transient voltage of claim 1, wherein said feedback signal generating circuit comprises:
A reference voltage source electrically connected to the voltage regulation sub-circuit,
When the voltage regulation sub-circuit controls the feedback signal generating circuit to discharge, the voltage regulation sub-circuit outputs a low voltage to the reference voltage source so that the reference voltage source stops working.
3. The power supply device for suppressing transient voltage of claim 1, wherein said feedback signal generating circuit further comprises:
an operational amplifier electrically connected to the reference voltage source and the second resistor, and
A feedback sub-circuit electrically connected to the operational amplifier, the power supply circuit and the second resistor,
The operational amplifier comprises an operational amplifier output end, an operational amplifier inverting input end and an operational amplifier non-inverting input end, wherein the operational amplifier output end is electrically connected to the feedback sub-circuit, and the operational amplifier non-inverting input end is electrically connected to the reference voltage source.
4. The power supply device for suppressing transient voltage of claim 3, wherein said feedback signal generating circuit further comprises:
a first voltage dividing resistor electrically connected to the power supply circuit, the second resistor, the inverting input terminal of the operational amplifier and the feedback sub-circuit, and
A second voltage dividing resistor electrically connected to the first voltage dividing resistor and the inverting input terminal of the operational amplifier,
When the reference voltage source stops working, a first voltage of the non-inverting input end of the operational amplifier is smaller than a first voltage division between the first voltage division resistor and the second voltage division resistor, so that the operational amplifier controls the power supply circuit through the output end of the operational amplifier and the feedback sub-circuit to reduce the output voltage.
5. The power supply apparatus for suppressing transient voltage of claim 4, wherein said power supply circuit further comprises:
A PWM control sub-circuit electrically connected to the feedback sub-circuit;
A power switch electrically connected to the PWM control sub-circuit;
a transformer electrically connected to the power switch and the auxiliary voltage generating sub-circuit;
a rectifying and filtering circuit electrically connected to the transformer, the feedback sub-circuit, the first voltage dividing resistor and the second resistor, and
The output end capacitor is electrically connected to the first voltage dividing resistor, the second resistor, the rectifying and filtering loop and the feedback sub-circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011050034.3A CN114337212B (en) | 2020-09-29 | 2020-09-29 | Power supply device for suppressing transient voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011050034.3A CN114337212B (en) | 2020-09-29 | 2020-09-29 | Power supply device for suppressing transient voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337212A CN114337212A (en) | 2022-04-12 |
| CN114337212B true CN114337212B (en) | 2025-03-11 |
Family
ID=81011189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011050034.3A Active CN114337212B (en) | 2020-09-29 | 2020-09-29 | Power supply device for suppressing transient voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114337212B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212413047U (en) * | 2020-09-29 | 2021-01-26 | 博大科技股份有限公司 | Power supply device for suppressing instantaneous voltage |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201424221A (en) * | 2012-12-10 | 2014-06-16 | Richtek Technology Corp | Power converter and related control circuit and controlling method |
| CN105048815B (en) * | 2015-05-05 | 2017-11-24 | 北京新雷能科技股份有限公司 | A kind of output voltage regulation circuit and power supply |
| JP6660241B2 (en) * | 2016-04-25 | 2020-03-11 | エイブリック株式会社 | Reference voltage generation circuit and DCDC converter having the same |
| CN107359786B (en) * | 2017-09-01 | 2023-03-31 | 湖南科技大学 | Soft start circuit for switching power supply |
-
2020
- 2020-09-29 CN CN202011050034.3A patent/CN114337212B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212413047U (en) * | 2020-09-29 | 2021-01-26 | 博大科技股份有限公司 | Power supply device for suppressing instantaneous voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114337212A (en) | 2022-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108781034B (en) | Controlled adaptive power limiter | |
| CN100442620C (en) | Systems and methods for multi-threshold overcurrent protection of switching power converters | |
| US6806694B2 (en) | Switching regulator with dynamic current limiting and drive circuit for the switching regulator | |
| US20090027928A1 (en) | Step up converter with overcurrent protection | |
| TW201530999A (en) | Boost apparatus with over-current and over-voltage protection function | |
| US9729043B2 (en) | Power conversion apparatus and protection method thereof while feedback current signal being abnormal | |
| US6816392B2 (en) | Overcurrent output protecting circuit and constant-voltage switching power supply incorporating the same | |
| US10615681B2 (en) | Switching power supply circuit | |
| US6952334B2 (en) | Linear regulator with overcurrent protection | |
| US9197203B2 (en) | Cycle modulation circuit for limiting peak voltage and associated power supply | |
| KR101193343B1 (en) | Power factor correction circuit and power supply having the same | |
| JP5126967B2 (en) | Switching power supply | |
| CN114337212B (en) | Power supply device for suppressing transient voltage | |
| CN212413047U (en) | Power supply device for suppressing instantaneous voltage | |
| US7190127B2 (en) | Shutdown circuit | |
| TWM607174U (en) | Power supply apparatus suppressing transient voltage | |
| KR101260990B1 (en) | Dc power supply apparatus | |
| KR100735498B1 (en) | Power supply with overvoltage protection circuit | |
| CN114743494B (en) | Control circuit, driving device and display | |
| KR101055055B1 (en) | Power Factor Correction Circuit of Power Supply | |
| US6577485B2 (en) | Ultra-wide input range power supply for circuit protection devices | |
| US11418123B2 (en) | Power supply apparatus suppressing transient voltage | |
| TWI747521B (en) | Power supply apparatus suppressing transient voltage | |
| JP2014068448A (en) | Input overvoltage prevention circuit and power supply unit | |
| CN112286277B (en) | Voltage regulating circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |