CN113014127A - Electronic equipment and power supply buffer protection circuit thereof - Google Patents
Electronic equipment and power supply buffer protection circuit thereof Download PDFInfo
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- CN113014127A CN113014127A CN202110201678.6A CN202110201678A CN113014127A CN 113014127 A CN113014127 A CN 113014127A CN 202110201678 A CN202110201678 A CN 202110201678A CN 113014127 A CN113014127 A CN 113014127A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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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
- H02H7/125—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 for rectifiers
- H02H7/1252—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 for rectifiers responsive to overvoltage in input or output, e.g. by load dump
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Protection Of Static Devices (AREA)
Abstract
The application discloses electronic equipment and power buffering protection circuit thereof, power buffering protection circuit include full-bridge rectifier circuit, switch circuit and electrolytic capacitor, and when electronic equipment was gone up the electricity, electrolytic capacitor's voltage was less than and predetermines the threshold value, and switch circuit disconnection, electrolytic capacitor charge in alternating current power supply's positive half cycle, for the load power supply in the negative half cycle, and electrolytic capacitor bears the highly compressed time only half cycle. When the voltage is stable when the voltage is charged to the preset threshold value, the switch circuit is switched on at the moment, so that the electrolytic capacitor can be charged in the whole period, and simultaneously the power is supplied to the load, the charging of the electrolytic capacitor at the moment is completed to reach the nominal voltage, the direct impact of larger voltage or current on the electrolytic capacitor at the moment of starting is avoided, the stable output voltage can be output, and the loss of electronic equipment is avoided.
Description
Technical Field
The present application relates to the field of power supply technologies, and in particular, to an electronic device and a power buffer protection circuit thereof.
Background
Electronic products generally need power supply, while the power supply of control boards of various electronic circuits is basically direct current power supply, and is usually supplied by a direct current power supply output after a 220V alternating current power supply is rectified and filtered. However, the voltage value in the power circuit is relatively high, and can reach up to 310V, even a high-power capacitor is difficult to bear such high voltage for a long time, and in addition, the current at the moment of starting the circuit is very large, the current can generate strong impact on the rectifier, the filter capacitor and the electronic equipment, so that the service life of the electronic equipment can be shortened, the equipment can be damaged, and in case of serious condition, the circuit can be even damaged, which causes danger.
In view of the above-mentioned prior art, it is an urgent need to solve the problem of the skilled person to find a power buffer protection circuit that can stabilize the power supply.
Disclosure of Invention
The application aims to provide an electronic device and a power supply buffer protection circuit thereof, which are used for avoiding direct impact of larger voltage or current on an electrolytic capacitor at the moment of starting up, outputting stable output voltage and avoiding loss of the electronic device.
In order to solve the above technical problem, the present application provides a power buffering protection circuit, including: the device comprises a full-bridge rectifying circuit, a switching circuit and an electrolytic capacitor;
the first input end of the full-bridge rectification circuit is respectively connected with the positive electrode of an alternating current power supply and the first end of the electrolytic capacitor, the second input end of the full-bridge rectification circuit is connected with the negative electrode of the alternating current power supply, the first output end of the full-bridge rectification circuit is connected with the input end of the switch circuit, the output end of the switch circuit is connected with the first end of the electrolytic capacitor, and the second end of the electrolytic capacitor is connected with the second output end of the full-bridge rectification circuit;
the switch circuit is switched off to switch off the first output end of the full-bridge rectification circuit and the electrolytic capacitor when the voltage of the electrolytic capacitor is smaller than a preset threshold value, and is switched on to switch on the first output end of the full-bridge rectification circuit and the electrolytic capacitor when the voltage of the electrolytic capacitor is larger than the preset threshold value.
Preferably, the switching circuit includes: the voltage sampling circuit, the voltage comparison circuit, the drive circuit and the relay;
the input end of the voltage sampling circuit is connected with the electrolytic capacitor, and the output end of the voltage sampling circuit, the voltage comparison circuit and the driving circuit are sequentially connected with the coil of the relay;
the contact of the relay is connected between the first output end of the full-bridge rectifying circuit and the first end of the electrolytic capacitor, and the driving circuit is used for controlling the contact of the relay to be closed or opened according to the comparison signal output by the voltage comparison circuit.
Preferably, the voltage sampling circuit includes a first resistor and a second resistor, the first resistor and the second resistor are connected in series, a first end of the first resistor is connected with a first end of the electrolytic capacitor, a second end of the second resistor is grounded, and a common end of the first resistor and the second resistor is connected with the voltage comparison circuit.
Preferably, the relay is a dual-contact relay, a first coil of the dual-contact relay is connected with the driving circuit, a second coil of the dual-contact relay is connected with the main control circuit, a first contact of the dual-contact relay is connected with a first output end of the full-bridge rectification circuit, a second contact of the dual-contact relay is connected with a first end of the electrolytic capacitor, and the main control circuit is configured to output a driving signal to enable the second coil to be powered when the voltage of the electrolytic capacitor is greater than the preset threshold;
wherein when the first coil and the second coil are both energized, the first contact and the second contact are closed simultaneously.
Preferably, the double-contact relay further comprises an isolation circuit connected between the main control circuit and the second coil of the double-contact relay.
Preferably, the isolation circuit is specifically an optocoupler.
Preferably, the rectifier circuit further comprises a fuse, a first end of the fuse is connected with the positive electrode of the alternating current power supply, and a second end of the fuse is connected with the first input end of the full-bridge rectifier circuit.
Preferably, the electrolytic capacitor further comprises a light emitting diode, wherein an anode of the light emitting diode is connected with the second end of the fuse, and a cathode of the light emitting diode is connected with the first end of the electrolytic capacitor.
Preferably, the driving circuit is an NPN transistor.
In order to solve the above technical problem, the present application provides an electronic device including the power buffer protection circuit as described above.
The application provides a power buffering protection circuit, including full-bridge rectifier circuit, switch circuit and electrolytic capacitor, full-bridge rectifier circuit's first input is connected with electrolytic capacitor's first end, and full-bridge rectifier circuit's first output is connected with switch circuit's input, and switch circuit's output is connected with electrolytic capacitor's first end, and electrolytic capacitor's second end is connected with full-bridge rectifier circuit's second output. The switch circuit is switched off when the voltage of the electrolytic capacitor is smaller than a preset threshold value, and is switched on when the voltage of the electrolytic capacitor is larger than the preset threshold value so as to control the electrolytic capacitor to supply power to the load. By applying the technical scheme, when the electronic equipment is powered on, the voltage of the electrolytic capacitor is smaller than the preset threshold value, the switching circuit is disconnected, the electrolytic capacitor is charged in the positive half period of the alternating current power supply, the load is supplied in the negative half period, and the time that the electrolytic capacitor bears the high voltage is only half period. When the voltage is stable when the voltage is charged to the preset threshold value, the switch circuit is switched on at the moment, so that the electrolytic capacitor can be charged in the whole period, and simultaneously the power is supplied to the load, the charging of the electrolytic capacitor at the moment is completed to reach the nominal voltage, the direct impact of larger voltage or current on the electrolytic capacitor at the moment of starting is avoided, the stable output voltage can be output, and the loss of electronic equipment is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic circuit diagram of a power buffer protection circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of another power buffer protection circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide the electronic equipment and the power supply buffer protection circuit thereof, which are used for avoiding the direct impact of larger voltage or current to the electrolytic capacitor in the moment of starting up, and meanwhile, the electronic equipment can output stable output voltage, and the loss of the electronic equipment is avoided.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of a power buffer protection circuit according to an embodiment of the present disclosure. As shown in fig. 1, the circuit includes: a full-bridge rectifier circuit 10, a switch circuit 11 and an electrolytic capacitor C0;
a first input end 1 of the full-bridge rectification circuit 10 is respectively connected with the anode of the alternating current power supply 12 and a first end of an electrolytic capacitor C0, a second input end 3 of the full-bridge rectification circuit 10 is connected with the cathode of the alternating current power supply 12, a first output end 2 of the full-bridge rectification circuit 10 is connected with an input end of a switch circuit 11, an output end of the switch circuit 11 is connected with a first end of an electrolytic capacitor C0, and a second end of an electrolytic capacitor C0 is connected with a second output end 4 of the full-bridge rectification circuit 10;
the switch circuit 11 is turned off to switch off the first output terminal 2 of the full-bridge rectifier circuit 10 and the electrolytic capacitor C0 when the voltage of the electrolytic capacitor C0 is less than a preset threshold, and is turned on to switch on the first output terminal 2 of the full-bridge rectifier circuit 10 and the electrolytic capacitor C0 when the voltage of the electrolytic capacitor C0 is greater than the preset threshold.
In a specific implementation, the ac power supply 12 is generally a 220V ac power supply, when the electronic device is powered on, the voltage of the electrolytic capacitor C0 is less than a preset threshold, the switching circuit 11 is turned off, in a positive half cycle of the ac power supply 12, the current passes through the positive electrode of the ac power supply 12, the electrolytic capacitor C0, then enters the full-bridge rectifier circuit 10 through the second output terminal 4 of the full-bridge rectifier circuit 10, and is connected to the negative electrode of the ac power supply 12 through the second input terminal 3 of the full-bridge rectifier circuit 10 for charging, the load is supplied in a negative half cycle, and the electrolytic capacitor C0 only has a half cycle when it bears a. When charging to the preset threshold, the voltage has already stabilized, and at this time, the switch circuit 11 is turned on, so that the electrolytic capacitor C0 can be charged through the full-bridge rectifier circuit 10 in the whole cycle while supplying power to the load.
The switching circuit 12 may be controlled to be turned on or off by a controller, or may be manually controlled. When the ac power source 12 is 220V ac, the preset threshold is set to 300V, and in other embodiments, the preset threshold may be set to another value, which is not limited in this application.
The application provides a power buffering protection circuit, including full-bridge rectifier circuit, switch circuit and electrolytic capacitor, full-bridge rectifier circuit's first input is connected with electrolytic capacitor's first end, and full-bridge rectifier circuit's first output is connected with switch circuit's input, and switch circuit's output is connected with electrolytic capacitor's first end, and electrolytic capacitor's second end is connected with full-bridge rectifier circuit's second output. The switch circuit is switched off when the voltage of the electrolytic capacitor is smaller than a preset threshold value, and is switched on when the voltage of the electrolytic capacitor is larger than the preset threshold value so as to control the electrolytic capacitor to supply power to the load. By applying the technical scheme, when the electronic equipment is powered on, the voltage of the electrolytic capacitor is smaller than the preset threshold value, the switching circuit is disconnected, the electrolytic capacitor is charged in the positive half period of the alternating current power supply, the load is supplied in the negative half period, and the time that the electrolytic capacitor bears the high voltage is only half period. When the voltage is stable when the voltage is charged to the preset threshold value, the switch circuit is switched on at the moment, so that the electrolytic capacitor can be charged in the whole period, and simultaneously the power is supplied to the load, the charging of the electrolytic capacitor at the moment is completed to reach the nominal voltage, the direct impact of larger voltage or current on the electrolytic capacitor at the moment of starting is avoided, the stable output voltage can be output, and the loss of electronic equipment is avoided.
Fig. 2 is a schematic circuit diagram of another power buffer protection circuit according to an embodiment of the present disclosure. As shown in fig. 2, the switching circuit 11 includes: the voltage sampling circuit, the voltage comparison circuit, the drive circuit and the relay;
the input end of the voltage sampling circuit is connected with the electrolytic capacitor C0, and the output end of the voltage sampling circuit, the voltage comparison circuit and the drive circuit are sequentially connected with the coil of the relay;
the contact of the relay is connected between the first output end 2 of the full-bridge rectifying circuit 10 and the first end of the electrolytic capacitor C0, and the driving circuit is used for controlling the contact of the relay to be closed or opened according to the comparison signal output by the voltage comparison circuit.
Specifically, the voltage sampling circuit comprises a first resistor R1 and a second resistor R2, the first resistor R1 is connected with the second resistor R2 in series, a first end of the first resistor R1 is connected with a first end of the electrolytic capacitor C0, a second end of the second resistor R2 is grounded, and a common end of the first resistor R1 and the second resistor R2 is connected with the voltage comparison circuit. The voltage comparison circuit can be realized by adopting a common operational amplifier, and the driving circuit is specifically an NPN type triode.
The voltage sampling circuit in the design is realized by two voltage division resistors which are connected in series, the voltage divided by the second resistor R2 in the series circuit is sent to the non-inverting input end of the operational amplifier and is compared with the reference voltage Vef, and when the voltage of the non-inverting input end of the operational amplifier is larger than the voltage Vef of the inverting input end, the operational amplifier is conducted. That is, the voltage comparison circuit may be turned on only when the electrolytic capacitor C0 reaches about the threshold voltage. Because the electric signal driving force output by the operational amplifier is insufficient, the NPN type triode is used as a driving circuit to be connected with a coil of the relay so as to control the contact of the relay to be closed or opened.
In a specific implementation, in order to further ensure that the voltage of the electrolytic capacitor C0 is connected to the first output end 2 of the full-bridge rectification circuit 10 only when the voltage of the electrolytic capacitor C0 rises to a preset threshold, further, the relay is specifically a dual-contact relay K1, a first coil of the dual-contact relay K1 is connected to the driving circuit, a second coil of the dual-contact relay K1 is connected to the main control circuit, a first contact of the dual-contact relay K1 is connected to the first output end 2 of the full-bridge rectification circuit 10, a second contact of the dual-contact relay K1 is connected to a first end of the electrolytic capacitor C0, and the main control circuit is configured to output a driving signal to enable the second coil to be powered when the voltage of the electrolytic capacitor C0 is greater than the preset;
wherein when both the first coil and the second coil are energized, the first contact and the second contact are closed simultaneously.
Because the main control circuit is the low pressure, and double contact relay K1 is the high pressure, further, still include isolation circuit, isolation circuit connects between main control circuit and double contact relay K1's second coil.
In particular, the isolation circuit is in particular an optocoupler.
In specific implementation, when the main control circuit acquires a signal that the voltage of the electrolytic capacitor C0 exceeds a preset threshold, the main control circuit outputs a Power-OK driving signal to the double-contact relay K1 to enable the second coil to be electrified, when the base electrode of the NPN type triode is electrified, the emitter electrode of the NPN type triode drives the first coil to be electrified, when the first coil and the second coil are electrified, the first contact and the second contact are simultaneously closed, and the electrolytic capacitor C0 in the circuit is charged completely. At the moment, the main control circuit controls the output again, so that the direct impact of larger voltage and current on the electrolytic capacitor C0 can be avoided, the situation that the instantaneous power is overlarge in the circuit can not exist, and the safety and the reliability are realized.
Since the circuit has no self-protection function, in order to realize the overcurrent protection of the circuit, a fuse F1 is arranged at the rectifier bridge, a first end of a fuse F1 is connected with the positive electrode of the alternating current power supply 12, a second end of a fuse F1 is connected with the first input end 1 of the full-bridge rectifier circuit 10, and the fuse F1 blows if the voltage and current are too high, so that the circuit is protected.
On the basis of the above embodiment, as a preferable embodiment, the electrolytic capacitor further includes a light emitting diode D1, an anode of the light emitting diode D1 is connected to the second terminal of the fuse F1, and a cathode of the light emitting diode D1 is connected to the first terminal of the electrolytic capacitor C0.
The light emitting diode D1 plays a role in indicating that when the charging of the electrolytic capacitor C0 is completed, the resistance of the electrolytic capacitor C0 is close to infinity, no current flows through the light emitting diode D1, and when the charging of the electrolytic capacitor C0 is completed, a current flows through the light emitting diode D1, and the light emitting diode D1 lights up.
In addition, the present application also provides an electronic device including the power supply buffer protection circuit mentioned in the above embodiment.
Since the power buffer protection circuit is described in detail above, the present embodiment is not described in detail.
The electronic equipment provided by the embodiment comprises a power supply buffer protection circuit, when the electronic equipment is powered on, the voltage of the electrolytic capacitor is smaller than a preset threshold value, the switching circuit is switched off, the electrolytic capacitor is charged in a positive half period of an alternating current power supply and supplies power to a load in a negative half period, and the electrolytic capacitor only has a half period when bearing a high voltage. When the voltage is stable when the voltage is charged to the preset threshold value, the switch circuit is switched on at the moment, so that the electrolytic capacitor can be charged in the whole period, and simultaneously the power is supplied to the load, the charging of the electrolytic capacitor at the moment is completed to reach the nominal voltage, the direct impact of larger voltage or current on the electrolytic capacitor at the moment of starting is avoided, the stable output voltage can be output, and the loss of electronic equipment is avoided.
The electronic device and the power buffering protection circuit thereof provided by the present application are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A power buffer protection circuit, comprising: the device comprises a full-bridge rectifying circuit, a switching circuit and an electrolytic capacitor;
the first input end of the full-bridge rectification circuit is respectively connected with the positive electrode of an alternating current power supply and the first end of the electrolytic capacitor, the second input end of the full-bridge rectification circuit is connected with the negative electrode of the alternating current power supply, the first output end of the full-bridge rectification circuit is connected with the input end of the switch circuit, the output end of the switch circuit is connected with the first end of the electrolytic capacitor, and the second end of the electrolytic capacitor is connected with the second output end of the full-bridge rectification circuit;
the switch circuit is switched off to switch off the first output end of the full-bridge rectification circuit and the electrolytic capacitor when the voltage of the electrolytic capacitor is smaller than a preset threshold value, and is switched on to switch on the first output end of the full-bridge rectification circuit and the electrolytic capacitor when the voltage of the electrolytic capacitor is larger than the preset threshold value.
2. The power buffer protection circuit of claim 1, wherein the switching circuit comprises: the voltage sampling circuit, the voltage comparison circuit, the drive circuit and the relay;
the input end of the voltage sampling circuit is connected with the electrolytic capacitor, and the output end of the voltage sampling circuit, the voltage comparison circuit and the driving circuit are sequentially connected with the coil of the relay;
the contact of the relay is connected between the first output end of the full-bridge rectifying circuit and the first end of the electrolytic capacitor, and the driving circuit is used for controlling the contact of the relay to be closed or opened according to the comparison signal output by the voltage comparison circuit.
3. The power supply buffer protection circuit according to claim 2, wherein the voltage sampling circuit comprises a first resistor and a second resistor, the first resistor and the second resistor are connected in series, a first end of the first resistor is connected with a first end of the electrolytic capacitor, a second end of the second resistor is grounded, and a common end of the first resistor and the second resistor is connected with the voltage comparison circuit.
4. The power supply buffer protection circuit according to claim 2, wherein the relay is a dual-contact relay, a first coil of the dual-contact relay is connected to the driving circuit, a second coil of the dual-contact relay is connected to a main control circuit, a first contact of the dual-contact relay is connected to a first output end of the full-bridge rectification circuit, a second contact of the dual-contact relay is connected to a first end of the electrolytic capacitor, and the main control circuit is configured to output a driving signal to energize the second coil when the voltage of the electrolytic capacitor is greater than the preset threshold;
wherein when the first coil and the second coil are both energized, the first contact and the second contact are closed simultaneously.
5. The power buffer protection circuit of claim 4, further comprising an isolation circuit connected between the master circuit and the second coil of the dual contact relay.
6. The power buffer protection circuit according to claim 5, wherein the isolation circuit is specifically an optocoupler.
7. The power buffer protection circuit according to claim 5, further comprising a fuse, a first end of the fuse being connected to a positive terminal of the AC power source, a second end of the fuse being connected to the first input terminal of the full-bridge rectification circuit.
8. The power buffer protection circuit of claim 7, further comprising a light emitting diode, an anode of the light emitting diode being connected to the second end of the fuse, and a cathode of the light emitting diode being connected to the first end of the electrolytic capacitor.
9. The power buffer protection circuit according to claim 3, wherein the driving circuit is an NPN transistor.
10. An electronic device, characterized by comprising a power supply buffer protection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201678.6A CN113014127B (en) | 2021-02-23 | 2021-02-23 | Electronic equipment and power supply buffer protection circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110201678.6A CN113014127B (en) | 2021-02-23 | 2021-02-23 | Electronic equipment and power supply buffer protection circuit thereof |
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| CN113014127A true CN113014127A (en) | 2021-06-22 |
| CN113014127B CN113014127B (en) | 2022-06-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185117B1 (en) * | 1997-07-28 | 2001-02-06 | H.B. Industries | Self-compensating converter |
| JP2010051115A (en) * | 2008-08-22 | 2010-03-04 | Seiko Epson Corp | Rectification controller, full-wave rectifying circuit, electric power receiving apparatus, and no-contact power transmission system |
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
| CN204886735U (en) * | 2015-07-20 | 2015-12-16 | 深圳市金威源科技股份有限公司 | Direct current power circuit |
| CN211296590U (en) * | 2019-12-18 | 2020-08-18 | 常州市创联电源科技股份有限公司 | Voltage-multiplying rectifier converter of switching power supply |
-
2021
- 2021-02-23 CN CN202110201678.6A patent/CN113014127B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185117B1 (en) * | 1997-07-28 | 2001-02-06 | H.B. Industries | Self-compensating converter |
| JP2010051115A (en) * | 2008-08-22 | 2010-03-04 | Seiko Epson Corp | Rectification controller, full-wave rectifying circuit, electric power receiving apparatus, and no-contact power transmission system |
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
| CN204886735U (en) * | 2015-07-20 | 2015-12-16 | 深圳市金威源科技股份有限公司 | Direct current power circuit |
| CN211296590U (en) * | 2019-12-18 | 2020-08-18 | 常州市创联电源科技股份有限公司 | Voltage-multiplying rectifier converter of switching power supply |
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| CN113014127B (en) | 2022-06-24 |
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