CN110112704A - Accessory power supply over under-voltage protection circuit - Google Patents
Accessory power supply over under-voltage protection circuit Download PDFInfo
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- CN110112704A CN110112704A CN201910532995.9A CN201910532995A CN110112704A CN 110112704 A CN110112704 A CN 110112704A CN 201910532995 A CN201910532995 A CN 201910532995A CN 110112704 A CN110112704 A CN 110112704A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention discloses a kind of accessory power supply over under-voltage protection circuit, including accessory power supply ON-OFF control circuit and power switch circuit；Power switch circuit is equipped with power input, power output end and control connecting pin, power input is connect with external rectifier power source, external rectifier power source is external transformer primary side auxiliary winding to the out-put supply after external input power rectification, and power output end is connect with external pwm chip energization pins；Power switch circuit is according on or off between the voltage-controlled source input terminal and power output end of control connecting pin；Accessory power supply ON-OFF control circuit is equipped with input voltage connecting pin and auxiliary control terminal, and input voltage connecting pin is connect with external input power, and auxiliary control terminal is connect with control connecting pin；Accessory power supply ON-OFF control circuit controls the voltage of auxiliary control terminal according to the voltage of input voltage connecting pin.The present invention can solve the problems, such as the overtension of external input power or too low damage to accessory power supply.
Description
Technical field
The present invention relates to power protecting circuits, especially relate to accessory power supply over under-voltage protection circuit.
Background technique
If the voltage of accessory power supply input power (external input power) is excessively high, can be in accessory power supply and inverter
Portion's device damages；If the input voltage of accessory power supply is too low, accessory power supply can be caused to start repeatedly, to reduce inversion
The service life of device.Also, in traditional technology, generally existed using comparator as accessory power supply overvoltage-undervoltage protector part
At high cost, the defects of circuit is complicated.
Summary of the invention
The main object of the present invention is to provide a kind of accessory power supply over under-voltage protection circuit, can solve external input power
Overtension or too low the problem of accessory power supply is damaged, and reduce circuit cost.
The present invention proposes a kind of accessory power supply over under-voltage protection circuit, comprising: accessory power supply ON-OFF control circuit and power supply
Switching circuit；
The power switch circuit is provided with power input, power output end and control connecting pin, the power input
For connecting with external rectifier power source, the external rectifier power source is external transformer primary side auxiliary winding to external input at end
Out-put supply after power rectifier, the power output end with external pwm chip energization pins for connecting；The power supply
Switching circuit be used to be controlled according to the voltage of the control connecting pin be connected between the power input and power output end or
Shutdown；
The accessory power supply ON-OFF control circuit is provided with input voltage connecting pin and auxiliary control terminal, the input voltage
For connecting with the external input power, the auxiliary control terminal is connect with the control connecting pin for connecting pin；The auxiliary
Power on-off control circuit is used to control the voltage of the auxiliary control terminal according to the voltage of the input voltage connecting pin.
Further, the accessory power supply ON-OFF control circuit includes: low-voltage protection circuit and excess voltage protection；
There are two the first connecting pin and first control terminals for the low-voltage protection circuit setting；First control terminal
It is connect with the input voltage connecting pin, one of them described first connecting pin is the auxiliary control terminal, another described the
One connecting pin is for being grounded；The low-voltage protection circuit, which is used to control two described first according to preset under-voltage threshold value, to be connected
Connect on or off between end；
There are two second connection end and second control terminals for the excess voltage protection setting；Second control terminal
It is connect with the input voltage connecting pin, one of them described second connection end is connect with first control terminal, another institute
Second connection end is stated for being grounded；The excess voltage protection is used to control two described the according to preset overvoltage threshold
On or off between two connecting pins.
Further, the low-voltage protection circuit includes: that under-voltage adjusts circuit and first voltage fiducial chip；
The output end that the control port of the first voltage fiducial chip and the under-voltage adjust circuit is connect, and described the
Two connecting pins of one voltage reference chip are respectively two first connecting pins；
The input terminal that the under-voltage adjusts circuit is first control terminal.
Further, the low-voltage protection circuit further includes the first divider resistance and first capacitor；
First divider resistance and the first capacitor output end that wherein one end adjusts circuit with the under-voltage are connect,
The other end is for being grounded.
Further, the excess voltage protection includes: that overvoltage adjusts circuit and second voltage fiducial chip；
The output end that the control port of the second voltage fiducial chip and the overvoltage adjust circuit is connect, and described the
Two connecting pins of two voltage reference chips are respectively two second connection ends；
The input terminal that the overvoltage adjusts circuit is second control terminal.
Further, the excess voltage protection further includes the second divider resistance and the second capacitor；
Second divider resistance and the second capacitor output end that wherein one end adjusts circuit with the overvoltage are connect,
The other end is for being grounded.
Further, the first voltage fiducial chip is LR431 linear integrated circuit.
Further, the second voltage fiducial chip is LR431 linear integrated circuit.
Further, the power switch circuit includes third divider resistance and a triode；
The emitter of the triode is connected with one end of third divider resistance, and connects the power input；
The collector of the triode is connected with the power output end；
The base stage of the triode is connected with the other end of third divider resistance, and connects the control connecting pin.
Further, the under-voltage adjusts circuit and overvoltage adjusts the pressure regulation that circuit includes several series connections
Resistance.
Accessory power supply over under-voltage protection circuit of the invention has the beneficial effect that through accessory power supply ON-OFF control circuit root
According to external input power voltage-controlled source switching circuit control connecting pin voltage, then by power switch circuit according to
Control on or off between the voltage-controlled source input terminal and power output end of connecting pin so that external rectifier power source with
External pwm chip energization pins connection can external input power overtension or it is too low when turn off, so as to mention
For the overvoltage/undervoltage protection to accessory power supply；Meanwhile it being formed using accessory power supply ON-OFF control circuit and power switch circuit auxiliary
Power supply over under-voltage protection circuit is helped, compared with traditional over under-voltage protection circuit, without comparator, to reduce circuit
Complexity and cost, i.e., accessory power supply over under-voltage protection circuit of the invention have the characteristics that easily general, easy design, low cost.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of accessory power supply over under-voltage protection circuit of the embodiment of the present invention；
Fig. 2 is a kind of structural block diagram of accessory power supply over under-voltage protection circuit of the embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " above-mentioned " " above-mentioned " and "the" may also comprise plural form.It is to be further understood that making in specification of the invention
Wording " comprising " refers to that there are features described above, integer, step, operation, element, unit, module and/or components, but simultaneously
Do not preclude the presence or addition of other one or more features, integer, step, operation, element, unit, module, component and/or it
Group.It should be understood that when we say that an element is " connected " or " coupled " to another element, it can be directly connected to or couple
To other elements, or there may also be intermediary elements.In addition, " connection " used herein or " coupling " may include wirelessly connecting
It connects or wirelessly couples.Wording "and/or" used herein includes one or more associated listing the whole or any of item
Unit and all combination.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless idealization or meaning too formal otherwise will not be used by specific definitions as here
To explain.
Referring to Fig.1, Fig. 2, a kind of accessory power supply over under-voltage protection circuit of the embodiment of the present invention, comprising: accessory power supply is opened
Close control circuit 10 and power switch circuit 20；
It is defeated that above-mentioned power switch circuit 20 is provided with power input, power output end and control connecting pin, above-mentioned power supply
Enter end for connecting with external rectifier power source VC, said external rectifier power source VC is that external transformer primary side auxiliary winding is external
Out-put supply after portion input power REC+1 rectification, above-mentioned power output end are used for and external pwm chip energization pins
VCC (pulse width modulation control chip energization pins) connection；Above-mentioned power switch circuit 20 is used to be connected according to above-mentioned control
The voltage at end controls on or off between above-mentioned power input and power output end；
Above-mentioned accessory power supply ON-OFF control circuit is provided with input voltage connecting pin and auxiliary control terminal, above-mentioned input voltage
For connecting with said external input power REC+1, above-mentioned auxiliary control terminal is connect with above-mentioned control connecting pin for connecting pin；It is above-mentioned
Accessory power supply ON-OFF control circuit 10 is used to control the electricity of above-mentioned auxiliary control terminal according to the voltage of above-mentioned input voltage connecting pin
Pressure.
Accessory power supply over under-voltage protection circuit of the invention, by accessory power supply ON-OFF control circuit 10 according to external input
The voltage of the control connecting pin of the voltage-controlled source switching circuit 20 of power supply REC+1, then pass through 20 basis of power switch circuit
On or off between the voltage-controlled source input terminal and power output end of connecting pin is controlled, so that external rectifier power source VC
With external pwm chip energization pins VCC connection can external input power REC+1 overtension or it is too low when close
It is disconnected, to can provide the overvoltage/undervoltage protection to accessory power supply；Meanwhile using accessory power supply ON-OFF control circuit 10 and power switch
The accessory power supply over under-voltage protection circuit that circuit 20 forms, compared with traditional over under-voltage protection circuit, without comparator,
To reduce the complexity and cost of circuit.
Above-mentioned accessory power supply ON-OFF control circuit 10 includes: low-voltage protection circuit 101 and excess voltage protection 102；
There are two the first connecting pin and first control terminals for the above-mentioned setting of low-voltage protection circuit 101；Above-mentioned first control
End processed is connect with above-mentioned input voltage connecting pin, one of them above-mentioned first connecting pin is above-mentioned auxiliary control terminal, on another
The first connecting pin is stated for being grounded REC-1；Above-mentioned low-voltage protection circuit is used to control two according to preset under-voltage threshold value
On or off between above-mentioned first connecting pin；
There are two second connection end and second control terminals for the above-mentioned setting of excess voltage protection 102；Above-mentioned second control
End processed is connect with above-mentioned input voltage connecting pin, one of them above-mentioned second connection end is connect with above-mentioned first control terminal, another
A above-mentioned second connection end is for being grounded REC-1；Above-mentioned excess voltage protection is used to be controlled according to preset overvoltage threshold
On or off between two above-mentioned second connection ends.
Above-mentioned low-voltage protection circuit 101 includes: that under-voltage adjusts circuit 1 and first voltage fiducial chip U2；
The control port P4 of above-mentioned first voltage fiducial chip U2 is connect with the output end that above-mentioned under-voltage adjusts circuit 1,
Two connecting pins P5, P6 of above-mentioned first voltage fiducial chip U2 are respectively two above-mentioned first connecting pins；
The input terminal that above-mentioned under-voltage adjusts circuit 1 is above-mentioned first control terminal.
Above-mentioned excess voltage protection 102 includes: that overvoltage adjusts circuit 3 and second voltage fiducial chip U4；
The control port P1 of above-mentioned second voltage fiducial chip U4 is connect with the output end that above-mentioned overvoltage adjusts circuit 3,
Two connecting pins P2, P3 of above-mentioned second voltage fiducial chip U4 are respectively two above-mentioned second connection ends；
The input terminal that above-mentioned overvoltage adjusts circuit 3 is above-mentioned second control terminal.
Voltage reference chip can be controlled according to the voltage of the preset protection voltage of chip and the control terminal of voltage reference chip
On or off between two connecting pin；Wherein, when the voltage of the control terminal of voltage reference chip is less than protection voltage two
A connecting pin shutdown, two connecting pin conductings when the voltage of the control terminal of voltage reference chip is greater than protection voltage.
In specific application, circuit 1 is adjusted according to specified brownout threshold setting under-voltage, makes external input power
When the voltage of REC+1 is lower than above-mentioned brownout threshold, the voltage of the control terminal of first voltage fiducial chip U2 is less than protection voltage.Root
Circuit 3 is adjusted according to specified overvoltage threshold setting overvoltage, when external input power REC+1 being made to be higher than above-mentioned overvoltage threshold, the
The voltage of the control terminal of two voltage reference chip U4 is greater than protection voltage.
Preferential, above-mentioned low-voltage protection circuit 101 further includes the first divider resistance R2 and first capacitor C2；Above-mentioned first
The divider resistance R2 and first capacitor C2 output end that wherein one end adjusts circuit 1 with above-mentioned under-voltage is connect, and the other end is used for
It is grounded REC-1.
Preferential, above-mentioned excess voltage protection 102 further includes the second divider resistance R4 and the second capacitor C4；Above-mentioned second
Divider resistance R4 and the second capacitor C4 output end that wherein one end adjusts circuit 3 with above-mentioned overvoltage is connect, and the other end is used for
It is grounded REC-1.
Above-mentioned first divider resistance R2 is used in low-voltage protection circuit 101, makes the control of first voltage fiducial chip U2
Port P4 processed gets the voltage of two connecting pins P5, P6 for controlling first voltage fiducial chip U2；Above-mentioned second partial pressure electricity
It hinders R4 to be used in excess voltage protection 102, makes the control port P1 of second voltage fiducial chip U4, get for controlling the
The voltage of two connecting pins P2, P3 of two voltage reference chip U4；Above-mentioned first capacitor C2 and the second capacitor C4 are respectively used to subtract
The signal errors of the control terminal of small first voltage fiducial chip U2 and second voltage fiducial chip U4.
Preferably, above-mentioned first voltage fiducial chip U2 is LR431 linear integrated circuit；Above-mentioned second voltage fiducial chip
U4 is LR431 linear integrated circuit；The reference voltage (protection voltage) of LR431 linear integrated circuit is 2.5V；LR431 linear set
The cheap and superior performance at circuit can further decrease cost of the invention and not influence overvoltage/undervoltage protective value.In addition,
First voltage fiducial chip U2 and second voltage fiducial chip U4 can use the chip of other models, such as XR431AL.
Above-mentioned power switch circuit 20 includes a third divider resistance R7 and triode Q5；Power switch in the present embodiment
Circuit 20 further includes third capacitor C7 and third current-limiting resistance R5, third capacitor C7 and third current-limiting resistance R5 of the invention auxiliary
It helps in power supply over under-voltage protection circuit as NC (normally-closed contact)；
The emitter e of above-mentioned triode Q5, one end of third divider resistance R7, one end of third capacitor C7 and third current limliting
One end of resistance R5 connects, and connects above-mentioned power input；
The collector c of above-mentioned triode Q5 is connected with the other end of third current-limiting resistance R5, and it is defeated to connect above-mentioned power supply
Outlet；
The base stage b of above-mentioned triode Q5, the other end of third divider resistance R7 are connected with the other end of third capacitor C7, and
And the above-mentioned control connecting pin of connection.
Above-mentioned third divider resistance R7 is used to adjust the voltage of the base stage b of triode Q5.
The 4th partial pressure is equipped in the present embodiment, between above-mentioned accessory power supply ON-OFF control circuit 10 and power switch circuit 20
Resistance R6, the both ends of above-mentioned 4th divider resistance R6 are connect with above-mentioned control connecting pin and auxiliary control terminal respectively.
In specific application, (external transformer primary side auxiliary winding is to external input power by external rectifier power source VC
Out-put supply after REC+1 rectification) it is connect with the base stage b of triode Q5, the auxiliary control of accessory power supply ON-OFF control circuit 10
End is connect with the control connecting pin of power switch circuit 20, and is connected by control connecting pin and one end of the 4th divider resistance R6
It connects and whether the other end of the 4th divider resistance R6 of the control of accessory power supply ON-OFF control circuit 10 is grounded REC-1, to control
The voltage voltage of connecting pin (control) of the base stage b of triode Q5, and then control the emitter e and collector c of triode Q5
On or off achievees the purpose that control whether external rectifier power source VC powers to external pwm chip energization pins VCC.
External rectifier power source VC is connect with the emitter e of triode Q5, and emitter e can be made by being supplied to emitter e one
The bias voltage be connected between collector c.If two connecting pins P5, P6 of first voltage fiducial chip U2 are connected, triode
The base stage b of Q5 is grounded REC-1 by the 4th divider resistance R6, at this time the emitter e voltage of triode Q5 > base stage b voltage > current collection
Pole c voltage makes the emitter e and collector c conducting of triode Q5.If two connecting pin P5 of first voltage fiducial chip U2,
P6 shutdown closes the emitter e of triode Q5 and collector c without bias voltage between the emitter e and base stage b of triode Q5
It is disconnected.
Above-mentioned under-voltage adjusts circuit 1 and overvoltage adjusts regulating resistor of the circuit 3 including several series connections.This
In embodiment, above-mentioned under-voltage adjusts first regulating resistor R11~R15 that circuit 1 includes 5 series connections；Above-mentioned overvoltage
Adjust first regulating resistor R31~R35 that circuit 3 includes 5 series connections.The regulating resistor group being connected in series by several
The power of each resistance can be reduced at voltage regulator circuit, to improve the stability of circuit and reduce circuit cost.In addition, owing
Voltage regulator circuit 1 and overvoltage, which adjust circuit 3, can be used other voltage regulator circuits, such as single resistance, adjustable resistance.
In the working principle of the accessory power supply over under-voltage protection circuit of the embodiment of the present invention, the working principle of under-voltage protection
Are as follows: when the voltage of external input power REC+1 is less than brownout threshold, under-voltage adjusts circuit 1 and adjusts first voltage fiducial chip
The voltage of the control port P4 of U2 is less than 2.5V, so that two the first connecting pin shutdowns, make the emitter e and current collection of triode Q5
It is turned off between the c of pole, cuts off the connection of external rectifier power source VC and external pwm chip energization pins VCC.
In the working principle of the accessory power supply over under-voltage protection circuit of the embodiment of the present invention, the working principle of overvoltage protection
Are as follows: when the voltage of external input power REC+1 is greater than overvoltage threshold, overvoltage adjusts circuit 3 and adjusts second voltage fiducial chip
The voltage of the control port P1 of U4 is greater than 2.5V, so that two second connection end conductings, make the control of first voltage fiducial chip U2
The voltage of port P4 processed is less than 2.5V (ground connection REC-1), thus two the first connecting pin shutdowns, and then the emitter of triode Q5
It is turned off between e and collector c, cuts off the connection of external rectifier power source VC and external pwm chip energization pins VCC.
Above the above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of accessory power supply over under-voltage protection circuit characterized by comprising accessory power supply ON-OFF control circuit and power supply are opened
Powered-down road；
The power switch circuit is provided with power input, power output end and control connecting pin, the power input and uses
It is connect in external rectifier power source, the external rectifier power source is external transformer primary side auxiliary winding to external input power
Out-put supply after rectification, the power output end with external pwm chip energization pins for connecting；The power switch
Circuit is used to control on or off between the power input and power output end according to the voltage of the control connecting pin；
The accessory power supply ON-OFF control circuit is provided with input voltage connecting pin and auxiliary control terminal, the input voltage connection
For connecting with the external input power, the auxiliary control terminal is connect with the control connecting pin at end；The accessory power supply
ON-OFF control circuit is used to control the voltage of the auxiliary control terminal according to the voltage of the input voltage connecting pin.
2. accessory power supply over under-voltage protection circuit according to claim 1, which is characterized in that the accessory power supply switch control
Circuit processed includes: low-voltage protection circuit and excess voltage protection；
There are two the first connecting pin and first control terminals for the low-voltage protection circuit setting；First control terminal and institute
The connection of input voltage connecting pin is stated, one of them described first connecting pin is the auxiliary control terminal, another described first company
End is connect for being grounded；The low-voltage protection circuit is used to control two first connecting pins according to preset under-voltage threshold value
Between on or off；
There are two second connection end and second control terminals for the excess voltage protection setting；Second control terminal and institute
The connection of input voltage connecting pin is stated, one of them described second connection end connect with first control terminal, another described the
Two connecting pins are for being grounded；The excess voltage protection, which is used to control two described second according to preset overvoltage threshold, to be connected
Connect on or off between end.
3. accessory power supply over under-voltage protection circuit according to claim 2, which is characterized in that the low-voltage protection circuit
It include: that under-voltage adjusts circuit and first voltage fiducial chip；
The control port of the first voltage fiducial chip is connect with the output end that the under-voltage adjusts circuit, first electricity
Two connecting pins for pressing fiducial chip are respectively two first connecting pins；
The input terminal that the under-voltage adjusts circuit is first control terminal.
4. accessory power supply over under-voltage protection circuit according to claim 3, which is characterized in that the low-voltage protection circuit
It further include the first divider resistance and first capacitor；
First divider resistance and the first capacitor output end that wherein one end adjusts circuit with the under-voltage are connect, another
End is for being grounded.
5. accessory power supply over under-voltage protection circuit according to claim 3, which is characterized in that the excess voltage protection
It include: that overvoltage adjusts circuit and second voltage fiducial chip；
The control port of the second voltage fiducial chip is connect with the output end that the overvoltage adjusts circuit, second electricity
Two connecting pins for pressing fiducial chip are respectively two second connection ends；
The input terminal that the overvoltage adjusts circuit is second control terminal.
6. accessory power supply over under-voltage protection circuit according to claim 5, which is characterized in that the excess voltage protection
It further include the second divider resistance and the second capacitor；
Second divider resistance and the second capacitor output end that wherein one end adjusts circuit with the overvoltage are connect, another
End is for being grounded.
7. accessory power supply over under-voltage protection circuit according to claim 3, which is characterized in that the first voltage benchmark core
Piece is LR431 linear integrated circuit.
8. accessory power supply over under-voltage protection circuit according to claim 5, which is characterized in that the second voltage benchmark core
Piece is LR431 linear integrated circuit.
9. accessory power supply over under-voltage protection circuit according to claim 1 or 2, which is characterized in that the power switch electricity
Road includes third divider resistance and a triode；
The emitter of the triode is connected with one end of third divider resistance, and connects the power input；
The collector of the triode is connected with the power output end；
The base stage of the triode is connected with the other end of third divider resistance, and connects the control connecting pin.
10. accessory power supply over under-voltage protection circuit according to claim 5, which is characterized in that the under-voltage adjusts electricity
It includes the regulating resistor that several are connected in series that road and overvoltage, which adjust circuit,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532995.9A CN110112704A (en) | 2019-06-19 | 2019-06-19 | Accessory power supply over under-voltage protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532995.9A CN110112704A (en) | 2019-06-19 | 2019-06-19 | Accessory power supply over under-voltage protection circuit |
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| CN110112704A true CN110112704A (en) | 2019-08-09 |
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| CN201910532995.9A Pending CN110112704A (en) | 2019-06-19 | 2019-06-19 | Accessory power supply over under-voltage protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003475A (en) * | 2020-07-15 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Auxiliary converter for PSU (power system unit) of server |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204177857U (en) * | 2014-11-25 | 2015-02-25 | 德力西电气有限公司 | A kind of overvoltage/undervoltage decision circuitry and over under-voltage protection circuit |
| CN204441853U (en) * | 2015-02-06 | 2015-07-01 | 青岛歌尔声学科技有限公司 | A kind of overvoltage crowbar and electronic product |
| CN206323126U (en) * | 2016-12-28 | 2017-07-11 | 广州视源电子科技股份有限公司 | A kind of AC overvoltage crowbars with runback bit function |
| CN107681636A (en) * | 2017-11-22 | 2018-02-09 | 合肥惠科金扬科技有限公司 | A kind of overvoltage crowbar and Switching Power Supply |
| CN207398814U (en) * | 2017-09-29 | 2018-05-22 | 广州视源电子科技股份有限公司 | Under-voltage overvoltage crowbar and electric power system |
| CN109361195A (en) * | 2018-10-12 | 2019-02-19 | 深圳市华星光电半导体显示技术有限公司 | A kind of protection circuit against input over-voltage and power-supply system |
| CN109429026A (en) * | 2017-08-28 | 2019-03-05 | 强弦科技股份有限公司 | Power management circuit and microcontroller |
| CN109873398A (en) * | 2019-02-21 | 2019-06-11 | 广州视源电子科技股份有限公司 | Chip under-voltage protecting circuit and chip circuit |
-
2019
- 2019-06-19 CN CN201910532995.9A patent/CN110112704A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204177857U (en) * | 2014-11-25 | 2015-02-25 | 德力西电气有限公司 | A kind of overvoltage/undervoltage decision circuitry and over under-voltage protection circuit |
| CN204441853U (en) * | 2015-02-06 | 2015-07-01 | 青岛歌尔声学科技有限公司 | A kind of overvoltage crowbar and electronic product |
| CN206323126U (en) * | 2016-12-28 | 2017-07-11 | 广州视源电子科技股份有限公司 | A kind of AC overvoltage crowbars with runback bit function |
| CN109429026A (en) * | 2017-08-28 | 2019-03-05 | 强弦科技股份有限公司 | Power management circuit and microcontroller |
| CN207398814U (en) * | 2017-09-29 | 2018-05-22 | 广州视源电子科技股份有限公司 | Under-voltage overvoltage crowbar and electric power system |
| CN107681636A (en) * | 2017-11-22 | 2018-02-09 | 合肥惠科金扬科技有限公司 | A kind of overvoltage crowbar and Switching Power Supply |
| CN109361195A (en) * | 2018-10-12 | 2019-02-19 | 深圳市华星光电半导体显示技术有限公司 | A kind of protection circuit against input over-voltage and power-supply system |
| CN109873398A (en) * | 2019-02-21 | 2019-06-11 | 广州视源电子科技股份有限公司 | Chip under-voltage protecting circuit and chip circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112003475A (en) * | 2020-07-15 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Auxiliary converter for PSU (power system unit) of server |
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