CN105932644A - Switching power supply and protection circuit thereof - Google Patents
Switching power supply and protection circuit thereof Download PDFInfo
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- CN105932644A CN105932644A CN201610360284.4A CN201610360284A CN105932644A CN 105932644 A CN105932644 A CN 105932644A CN 201610360284 A CN201610360284 A CN 201610360284A CN 105932644 A CN105932644 A CN 105932644A
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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
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Abstract
The invention belongs to the field of switching power supplies and provides a switching power supply and a protection circuit thereof. When the current at a first input end and the current at a second input end of a current acquisition module are greater than preset current, or voltage of an output detection end of a voltage acquisition module is higher than preset voltage, a microprocessor controls an output end of the current acquisition module to be at high level, so that a first input end and a second output end of the voltage acquisition module are disconnected; meanwhile, the microprocessor controls a controlled end of the current acquisition module and a controlled end of the voltage acquisition module to be at high level, so that the switching power supply is in a closed state, and the closed state is kept until the current values of the first input end and the second input end of the current acquisition module are preset values of normal work values, or the voltage of the output detection end of the voltage acquisition module is a preset value of the normal work value. The protection circuit provided by the embodiments of the invention has a simple circuit design structure, and the overcurrent and overvoltage protection can be carried out on the switching power supply effectively.
Description
Technical field
The invention belongs to field of switch power, particularly relate to a kind of Switching Power Supply and protection circuit thereof.
Background technology
Switching Power Supply is to utilize modern power electronics technology, controls the time ratio that switching tube turns on and off, and maintains a kind of power supply of regulated output voltage, and Switching Power Supply is typically controlled IC and MOSFET by pulse width modulation (PWM) and constitutes.Development and innovation along with Power Electronic Technique so that switch power technology is also innovated constantly.At present, Switching Power Supply is widely used almost all of electronic equipment with small-sized, light weight and high efficiency feature, is that current electronics and information industry develops rapidly indispensable a kind of power mode.
But, the security protection of current Switching Power Supply is complex, tends not to when running into overcurrent-overvoltage protect Switching Power Supply timely and effectively, causes the damage of Switching Power Supply.
Summary of the invention
The purpose of the embodiment of the present invention is to provide the protection circuit of a kind of Switching Power Supply; aim to solve the problem that the security protection of current Switching Power Supply is complex; timely and effectively Switching Power Supply can not be protected when running into overcurrent-overvoltage, the problem causing the damage of Switching Power Supply.
In order to solve the problems referred to above, the present invention is achieved in that the protection circuit of a kind of Switching Power Supply, is connected with the microprocessor in Switching Power Supply and voltage changer respectively, and described protection circuit includes current acquisition module and voltage acquisition module；
The power input of described voltage acquisition module connects the voltage output end of described voltage changer, first output of described voltage acquisition module terminates the first input end of described current acquisition module, second output of described voltage acquisition module terminates the second input of described current acquisition module, and the second output of described voltage acquisition module is the output of described Switching Power Supply simultaneously；The output of described current acquisition module terminates the input of described voltage acquisition module；The controlled end of described current acquisition module, the controlled end of described voltage acquisition module and output detections end connect with described microprocessor respectively.
Another object of the present invention is to provide a kind of Switching Power Supply, described Switching Power Supply includes protection circuit described above.
In embodiments of the present invention, when the first input end of described current acquisition module and the electric current of the second input are more than predetermined current, or the voltage of the output detections end of voltage acquisition module higher than predeterminated voltage time, the output being controlled described current acquisition module by microprocessor is placed in high level, thus disconnects the first output and second output of described voltage acquisition module；Simultaneously, described microprocessor controls the described controlled end of current acquisition module and is placed in high level with the controlled end of voltage acquisition module, Switching Power Supply is closed, and the most extremely the first input end of described current acquisition module and the current value of the second input are default value, or the voltage continuing the output detections end to described voltage acquisition module is default value, the circuit design of the protection circuit that the embodiment of the present invention provides is simple, it is possible to effectively Switching Power Supply is carried out overcurrent-overvoltage protection.
Accompanying drawing explanation
The function structure chart of the protection circuit of the Switching Power Supply that Fig. 1 provides for the embodiment of the present invention；
Fig. 2 for another embodiment of the present invention provide the function structure chart of protection circuit of Switching Power Supply；
The circuit structure diagram of the protection circuit of the Switching Power Supply that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment the present invention implemented and is described in detail:
As it is shown in figure 1, the protection circuit 100 in the embodiment of the present invention is connected with the microprocessor 20 in Switching Power Supply and voltage changer 10 respectively.
As it is shown in figure 1, described protection circuit 100 includes current acquisition module 101 and voltage acquisition module 102.Wherein, the power input of described voltage acquisition module 102 connects the voltage output end of described voltage changer 10, first output of described voltage acquisition module 102 terminates the first input end of described current acquisition module 101, second output of described voltage acquisition module 102 terminates the second input of described current acquisition module 101, and the second output of described voltage acquisition module 102 is the output of described Switching Power Supply simultaneously.The output of described current acquisition module 101 terminates the input of described voltage acquisition module 102；The controlled end of described current acquisition module 101, the controlled end of described voltage acquisition module 102 and output detections end connect with described microprocessor 20 respectively.
In the present embodiment, described protection circuit 100 is connected in Switching Power Supply internal circuit, the controlled end of described current acquisition module 101, for the operating current of the input of described current acquisition module 101 being acquired for microprocessor and current potential conversion.When the input electric current of described current acquisition module 101 is more than predetermined current, microprocessor 20 controls the output of described current acquisition module 101 and is placed in high level, thus disconnects the first output and second output of described voltage acquisition module 102.Meanwhile, the controlled end of controlled end and voltage acquisition module 102 that described microprocessor 20 controls current acquisition module 101 is placed in high level, and the electric current continuing the input to described current acquisition module 101 is default value.
As another preferred embodiment of the present invention, the operating voltage of the output of described voltage acquisition module 102 is acquired and current potential conversion by the output detections end of described voltage acquisition module 102 for microprocessor, when the voltage of the output detections end of described voltage acquisition module 102 is higher than predeterminated voltage, microprocessor 20 controls the output of described current acquisition module and is placed in high level, thus disconnect the output of described voltage acquisition module 102, the controlled end of controlled end and voltage acquisition module 102 that microprocessor 20 controls described current acquisition module 101 is placed in high level simultaneously, and the voltage continuing the output detections end to described voltage acquisition module 102 is default value.
In order to realize when the electric current of the input of described current acquisition module 101 is more than predetermined current, described microprocessor 20 can control the output of described current acquisition module 101 and be placed in high level, thus disconnect the output of described voltage acquisition module 102, in the present embodiment, as in figure 2 it is shown, described current acquisition module 101 includes: amplifier module 1011, comparison module 1012 and power supply 1013.Described amplifier module 1011 is connected with described power supply 1013 with comparison module difference 1012.
Concrete, as in figure 2 it is shown, the first input end that the normal phase input end of described amplifier module 1011 is described current acquisition module 101, it is connected with the first output of described voltage acquisition module 102.The negative-phase input of described amplifier module 1011 is the second input of described current acquisition module 101, is connected with the second output of described voltage acquisition module 102.
As in figure 2 it is shown, the output of described amplifier module 1011 terminates the input of described comparison module 1012.The output of described comparison module 1012 is the output of described current acquisition module 1011, is connected with the input of described voltage acquisition module 102.The controlled end of described comparison module 1012 is the controlled end of described current acquisition module 101, is connected with described microprocessor 20.
Fig. 3 shows the circuit structure diagram of the protection circuit of the Switching Power Supply that the embodiment of the present invention provides, and for convenience of description, illustrate only part related to the present invention, and details are as follows:
As one embodiment of the present invention, described detection amplifier module 1011 includes: for amplifying the first chip U1 of input current, electric capacity C52, diode D1, resistance R401 and resistance R402 for current limliting.
Described electric capacity C52 is connected between feeder ear and the ground of described first chip U1, it is connected with resistance R401 between negative-phase input and described voltage acquisition module first output of described first chip U1, it is connected with resistance R402 between normal phase input end and second output of described voltage acquisition module of described first chip U1, it is parallel with resistance R403 and electric capacity C51 between output and the ground terminal of described first chip U1, the positive pole of described diode D1 and the output of the first chip U1 are connected, and the negative pole of described diode D1 is the output of described amplifier module.
As it is shown on figure 3, the feeder ear of described first chip U1 is connected with described power supply 1013.It is connected with resistance R401 between negative-phase input and described voltage acquisition module 102 first output of described first chip U1, it is connected with resistance R402 between normal phase input end and second output of described voltage acquisition module 102 of described first chip U1, wherein, described resistance R401 and resistance R402 is current limliting resistance.It is parallel with resistance R403 and electric capacity C51 between output and the ground terminal of described first chip U1.
As it is shown on figure 3, the output of the positive pole of described diode D1 and the first chip U1 is connected, the negative pole of described diode D1 connects described comparison module.Described electric capacity C52 is connected between feeder ear and the ground of described first chip U1, and this electric capacity C52 is used for noise reduction.
As one embodiment of the present invention, described comparison module includes: for carry out voltage ratio compared with the second chip U2, electric capacity C54, diode D2, the first switching tube Q1, second switch pipe Q2 and resistance R407.
It is connected with electric capacity C53 between feeder ear and the ground of the second chip U2, it is parallel with resistance R406 and electric capacity C55 between normal phase input end and the ground of described second chip U2, it is connected with resistance R405 between output and the feeder ear of described second chip U2, the output connecting resistance R409 of described second chip U2, the described resistance R409 other end is the output of described current acquisition module, is connected to described electric capacity C54 described between negative-phase input and the ground of two chip U2；Resistance R407 is connected between output and the diode D2 positive pole of described second chip U2, and described diode D2 negative pole is connected to the normal phase input end of described second chip U2；The control end controlling end and second switch pipe Q2 of the first switching tube Q1 is the controlled end of described current acquisition module altogether；Wherein, the hot end of described first switching tube Q1 is connected with the positive pole of described diode D2, the cold end ground connection of described first switching tube Q1, and and controls to be connected with resistance R403 between end；The hot end of described second switch pipe Q2 is connected to the output of described second chip U2, the cold end ground connection of described second switch pipe Q2 via resistance R409, and and controls to be connected with resistance R404 between end.
As shown in Figure 3, the power supply of described second chip U2 terminates described power supply, it is connected with electric capacity C53 between feeder ear and the ground of described second chip U2, it is parallel with resistance R406 and electric capacity C55 between normal phase input end and the ground of described second chip U2, it is connected with resistance R405 between output and the feeder ear of described second chip U2, the output connecting resistance R409 of described second chip U2, this resistance R409 other end is the output of described current acquisition module.Described electric capacity C54 is used for earth leakage protective, is connected between negative-phase input and the ground of described second chip U2.Described resistance R407 is connected between output and the diode D2 positive pole of described second chip U2, and described diode D2 negative pole is connected to the normal phase input end of described second chip U2.
In the present embodiment, described first chip U1 produced output electric current is produced the input voltage of described second chip U2 by resistance R403 in parallel, and is compared with it this input voltage from the reference voltage produced by described second chip U2.
As the preferred version in the present embodiment, as it is shown on figure 3, the control end controlling end and second switch pipe Q2 of described first switching tube Q1 is the controlled end of described current acquisition module altogether.Concrete, as it is shown on figure 3, the hot end of described first switching tube Q1 is connected with the positive pole of described diode D2, the cold end ground connection of described first switching tube Q1, it is connected with resistance R403 between cold end and the control end of described first switching tube Q1.The hot end of described second switch pipe Q2 is connected to the output of described second chip U2, the cold end ground connection of described second switch pipe Q2 via resistance R409, and and controls to be connected with resistance R404 between end.
As it is shown on figure 3, in another embodiment of the invention, it is preferable that described first switching tube Q1 and second switch pipe Q2 is respectively NMOS tube Q1 and NMOS tube Q2.The grid of described NMOS tube Q1, drain electrode and source electrode are respectively control end, hot end and the cold end of the first switching tube Q1.The grid of described NMOS tube Q2, drain electrode and source electrode are respectively control end, hot end and the cold end of second switch pipe Q2.
In addition, in other embodiments of the present invention, preferably, described first switching tube Q1 and second switch pipe Q2 is respectively NPN type triode Q1 and NPN type triode Q2, the base stage of described NPN type triode Q1, collector and emitter are respectively control end, hot end and the cold end of the first switching tube Q1, and the base stage of described NPN type triode Q2, collector and emitter are respectively control end, hot end and the cold end of second switch pipe Q2.
As one embodiment of the present invention; in order to realize when the voltage of the output detections end of described voltage acquisition module 102 is higher than predeterminated voltage; microprocessor 20 controls the output of described current acquisition module and is placed in high level; thus disconnecting the output of described voltage acquisition module 102, described voltage acquisition module includes: the 3rd chip U3, protective resistance R40, electric capacity C57, electric capacity C58, diode D3, the 3rd switching tube Q3 and the 4th switching tube Q4.
It is connected with electric capacity C57 between ground terminal and the voltage soft end of described 3rd chip U3, between Enable Pin and the ground of described 3rd chip and be connected to electric capacity C56, the power input that input is voltage acquisition module of described 3rd chip U3, the output of described 3rd chip U3 is connected via the positive pole of resistance R412 with described diode D3, the output that negative pole is described voltage acquisition module of described diode D3；
Described electric capacity C58 negative pole is connected with the earth terminal of described 3rd chip U3, its positive pole is connected with the positive pole of described diode D3, described electric capacity C58 positive pole and negative pole two ends are parallel with resistance R413, and this resistance R413 two ends form the output detections end of described voltage acquisition module respectively via resistance R414 and resistance R415；
The cold end ground connection of described 3rd switching tube Q3, and and control to be connected with resistance R411 between end, the hot end of described 3rd switching tube Q3 is connected with the Enable Pin of described 3rd chip U3, and described 3rd switching tube Q3 controls the controlled end that end is described voltage acquisition module；
The cold end ground connection of described 4th switching tube Q4, and and control to be connected with resistance R410 between end, the hot end of described 4th switching tube Q4 is connected with the Enable Pin of described 3rd chip U3, and described 4th switching tube Q4 controls the input that end is described voltage acquisition module.
As it is shown on figure 3, be connected with electric capacity C57 between No. 1 pin ground terminal of described 3rd chip U3 and No. 2 pin voltage soft start ends.Between No. 3 pin enabled ends and the ground of described 3rd chip and be connected to electric capacity C56.The power input that input is described voltage acquisition module 102 of described 3rd chip U3, is connected with described voltage changer 10.The output of described 3rd chip U3 is connected via the positive pole of resistance R412 with described diode D3, and the negative pole end of described diode D3 is the output of described voltage acquisition module 102.
As it is shown on figure 3, described electric capacity C58 is polar capacitor, this electric capacity C58 negative pole is connected with the earth terminal of described 3rd chip U3, and its positive pole is connected with the positive pole of described diode D3.Described electric capacity C58 positive pole and negative pole two ends are parallel with resistance R413, and described resistance R413 two ends form the output detections end of described voltage acquisition module respectively via resistance R414 and resistance R415.
As it is shown on figure 3, the cold end ground connection of described 3rd switching tube Q3, and and control to be connected with resistance R411 between end.The hot end of described 3rd switching tube Q3 is connected with the Enable Pin of described 3rd chip U3, and described 3rd switching tube Q3 controls the controlled end that end is described voltage acquisition module.The cold end ground connection of described 4th switching tube Q4, and and control to be connected with resistance R410 between end, the hot end of described 4th switching tube Q4 is connected with the enable input of described 3rd chip U3, and described 4th switching tube Q4 controls the first input end that end is described voltage acquisition module.
As one embodiment of the present invention, described 3rd switching tube Q3 and the 4th switching tube Q4 is respectively NMOS tube Q3 and NMOS tube Q4.The grid of described NMOS tube Q3, drain electrode and source electrode are respectively control end, hot end and the cold end of the 3rd switching tube Q3.The grid of described NMOS tube Q4, drain electrode and source electrode are respectively control end, hot end and the cold end of the 4th switching tube Q4.
In addition, in other embodiments of the present invention, preferably, described 3rd switching tube Q3 and the 4th switching tube Q4 is respectively NPN type triode Q3 and NPN type triode Q4, the base stage of described NPN type triode Q3, collector and emitter are respectively control end, hot end and the cold end of the 3rd switching tube Q3, and the base stage of described NPN type triode Q4, collector and emitter are respectively control end, hot end and the cold end of the 4th switching tube Q4.
The embodiment of the present invention additionally provides a kind of Switching Power Supply, and this Switching Power Supply includes protection circuit described above.
In embodiments of the present invention, when the first input end of described current acquisition module and the electric current of the second input are more than predetermined current, or the voltage of the output detections end of voltage acquisition module higher than predeterminated voltage time, the output being controlled described current acquisition module by microprocessor is placed in high level, thus disconnects the first output and second output of described voltage acquisition module；Simultaneously, described microprocessor controls the described controlled end of current acquisition module and is placed in high level with the controlled end of voltage acquisition module, Switching Power Supply is closed, and the most extremely the first input end of described current acquisition module and the current value of the second input are default value, or the voltage continuing the output detections end to described voltage acquisition module is default value, the circuit design of the protection circuit that the embodiment of the present invention provides is simple, it is possible to effectively Switching Power Supply is carried out overcurrent-overvoltage protection.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (10)
1. a protection circuit for Switching Power Supply, is connected with the microprocessor in Switching Power Supply and voltage changer respectively, it is characterised in that described protection circuit includes current acquisition module and voltage acquisition module；
The power input of described voltage acquisition module connects the voltage output end of described voltage changer, first output of described voltage acquisition module terminates the first input end of described current acquisition module, second output of described voltage acquisition module terminates the second input of described current acquisition module, and the second output of described voltage acquisition module is the output of described Switching Power Supply simultaneously；The output of described current acquisition module terminates the input of described voltage acquisition module；The controlled end of described current acquisition module, the controlled end of described voltage acquisition module and output detections end connect with described microprocessor respectively.
The protection circuit of Switching Power Supply the most according to claim 1, it is characterised in that described current acquisition module includes: amplifier module and comparison module；
Wherein, the normal phase input end of described amplifier module and negative-phase input are respectively first input end and second input of described current acquisition module, the output of described amplifier module terminates the input of described comparison module, the output of described comparison module is the output of described current acquisition module, and the controlled end of described comparison module is the controlled end of described current acquisition module.
The protection circuit of Switching Power Supply the most according to claim 2, it is characterised in that described amplifier module includes: for amplifying the first chip U1 of input current, electric capacity C52, diode D1, resistance R401 and resistance R402 for current limliting；
Described electric capacity C52 is connected between feeder ear and the ground of described first chip U1, it is connected with resistance R401 between negative-phase input and described voltage acquisition module first output of described first chip U1, it is connected with resistance R402 between normal phase input end and second output of described voltage acquisition module of described first chip U1, it is parallel with resistance R403 and electric capacity C51 between output and the ground terminal of described first chip U1, the positive pole of described diode D1 and the output of the first chip U1 are connected, and the negative pole of described diode D1 is the output of described amplifier module.
The protection circuit of Switching Power Supply the most according to claim 3, it is characterised in that described comparison module includes: for carry out voltage ratio compared with the second chip U2, electric capacity C54, diode D2, the first switching tube Q1, second switch pipe Q2 and resistance R407；
It is connected with electric capacity C53 between feeder ear and the ground of described second chip U2, it is parallel with resistance R406 and electric capacity C55 between normal phase input end and the ground of described second chip U2, it is connected with resistance R405 between output and the feeder ear of described second chip U2, the output connecting resistance R409 of described second chip U2, the described resistance R409 other end is the output of described current acquisition module, is connected to described electric capacity C54 described between negative-phase input and the ground of two chip U2；Described resistance R407 is connected between output and the diode D2 positive pole of described second chip U2, and described diode D2 negative pole is connected to the normal phase input end of described second chip U2；The control end controlling end and second switch pipe Q2 of described first switching tube Q1 is the controlled end of described current acquisition module altogether；Wherein, the hot end of described first switching tube Q1 is connected with the positive pole of described diode D2, the cold end ground connection of described first switching tube Q1, and and controls to be connected with resistance R403 between end；The hot end of described second switch pipe Q2 is connected to the output of described second chip U2, the cold end ground connection of described second switch pipe Q2 via resistance R409, and and controls to be connected with resistance R404 between end.
The protection circuit of Switching Power Supply the most according to claim 1, it is characterised in that described voltage acquisition module includes:
3rd chip U3, protective resistance R40, electric capacity C57, electric capacity C58, diode D3, the 3rd switching tube Q3 and the 4th switching tube Q4；
It is connected with electric capacity C57 between ground terminal and the voltage soft end of described 3rd chip U3, between Enable Pin and the ground of described 3rd chip and be connected to electric capacity C56, the power input that input is voltage acquisition module of described 3rd chip U3, the output of described 3rd chip U3 is connected via the positive pole of resistance R412 with described diode D3, the output that negative pole is described voltage acquisition module of described diode D3；Described electric capacity C58 negative pole is connected with the earth terminal of described 3rd chip U3, its positive pole is connected with the positive pole of described diode D3, described electric capacity C58 positive pole and negative pole two ends are parallel with resistance R413, and this resistance R413 two ends form the output detections end of described voltage acquisition module respectively via resistance R414 and resistance R415；The cold end ground connection of described 3rd switching tube Q3, and and control to be connected with resistance R411 between end, the hot end of described 3rd switching tube Q3 is connected with the Enable Pin of described 3rd chip U3, and described 3rd switching tube Q3 controls the controlled end that end is described voltage acquisition module；The cold end ground connection of described 4th switching tube Q4, and and control to be connected with resistance R410 between end, the hot end of described 4th switching tube Q4 is connected with the Enable Pin of described 3rd chip U3, and described 4th switching tube Q4 controls the input that end is described voltage acquisition module.
The protection circuit of Switching Power Supply the most according to claim 4, it is characterized in that, described first switching tube Q1 and second switch pipe Q2 is respectively NMOS tube Q1 and NMOS tube Q2, the grid of described NMOS tube Q1, drain electrode and source electrode are respectively control end, hot end and the cold end of the first switching tube Q1, and the grid of described NMOS tube Q2, drain electrode and source electrode are respectively control end, hot end and the cold end of second switch pipe Q2.
The protection circuit of Switching Power Supply the most according to claim 4, it is characterized in that, described first switching tube Q1 and second switch pipe Q2 is respectively NPN type triode Q1 and NPN type triode Q2, the base stage of described NPN type triode Q1, collector and emitter are respectively control end, hot end and the cold end of the first switching tube Q1, and the base stage of described NPN type triode Q2, collector and emitter are respectively control end, hot end and the cold end of second switch pipe Q2.
The protection circuit of Switching Power Supply the most according to claim 5, it is characterized in that, described 3rd switching tube Q3 and the 4th switching tube Q4 is respectively NMOS tube Q3 and NMOS tube Q4, the grid of described NMOS tube Q3, drain electrode and source electrode are respectively control end, hot end and the cold end of the 3rd switching tube Q3, and the grid of described NMOS tube Q4, drain electrode and source electrode are respectively control end, hot end and the cold end of the 4th switching tube Q4.
The protection circuit of Switching Power Supply the most according to claim 5, it is characterized in that, described 3rd switching tube Q3 and the 4th switching tube Q4 is respectively NPN type triode Q3 and NPN type triode Q4, the base stage of described NPN type triode Q3, collector and emitter are respectively control end, hot end and the cold end of the 3rd switching tube Q3, and the base stage of described NPN type triode Q4, collector and emitter are respectively control end, hot end and the cold end of the 4th switching tube Q4.
10. a Switching Power Supply, it is characterised in that described Switching Power Supply includes according to the protection circuit described in any one of claim 1-9.
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| CN201610360284.4A CN105932644A (en) | 2016-05-28 | 2016-05-28 | Switching power supply and protection circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610360284.4A CN105932644A (en) | 2016-05-28 | 2016-05-28 | Switching power supply and protection circuit thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080247109A1 (en) * | 2007-04-04 | 2008-10-09 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Electric outlet for computer and related computer peripherals |
| CN104362468A (en) * | 2014-10-29 | 2015-02-18 | 深圳市领芯者科技有限公司 | Power socket and monitoring device for same |
| CN205004734U (en) * | 2015-07-29 | 2016-01-27 | 中国长城计算机深圳股份有限公司 | Auxiliary electrical power source and protection control circuit thereof |
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2016
- 2016-05-28 CN CN201610360284.4A patent/CN105932644A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080247109A1 (en) * | 2007-04-04 | 2008-10-09 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Electric outlet for computer and related computer peripherals |
| CN104362468A (en) * | 2014-10-29 | 2015-02-18 | 深圳市领芯者科技有限公司 | Power socket and monitoring device for same |
| CN205004734U (en) * | 2015-07-29 | 2016-01-27 | 中国长城计算机深圳股份有限公司 | Auxiliary electrical power source and protection control circuit thereof |
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Application publication date: 20160907 |