CN106300642B - A kind of dual power supply redundancy cold standby circuit with power supply status output - Google Patents
A kind of dual power supply redundancy cold standby circuit with power supply status output Download PDFInfo
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- CN106300642B CN106300642B CN201610792840.5A CN201610792840A CN106300642B CN 106300642 B CN106300642 B CN 106300642B CN 201610792840 A CN201610792840 A CN 201610792840A CN 106300642 B CN106300642 B CN 106300642B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a kind of dual power supply redundancy cold standby switching circuits free of discontinuities, it include detection and output control circuit, metal-oxide-semiconductor driving circuit, fault detection and control signal feedback circuit, wherein detection is all connected to metal-oxide-semiconductor driving circuit with output control circuit, fault detection and control signal feedback circuit, and voltage input output passes through metal-oxide-semiconductor driving circuit.The present invention has the advantage that the 1, present invention realizes mainframe box power redundancy backup in industry compared with prior art, realizes power supply redundancy single board design, switching circuit is realized on veneer, meets equipment and replaces faulty power module in case of constant power.2, the present invention is built using common and without particular/special requirement Passive components, and simple and reliable, environmental requirement is low.
Description
Technical field
The present invention relates to the technical fields of automatic technology, especially require equipment cannot at work for important equipment
In the system restarted, power redundancy backup function is realized.
Background technique
It is past for long-time hitless operation, highly reliable system, such as base station communication apparatus, mobile unit, server
The power supply supply highly reliable toward needs.Redundant power design is key component therein, and important work is played in highly reliable system
With.Redundant power configures 2 power supplys, and when 1 power supply breaks down, other power supplys can be put at once, not interrupt equipment
It operates normally.It is similarly to the working principle of ups power: being replaced and powered by battery when alternating current power-off.Redundant power and UPS's
Difference is mainly that redundant power is by different power supply power supplies, and UPS is then that power supply power supply another battery is spare at any time,
Automatically switch when needing.
In vehicle-mounted PIS (passenger information system), monitoring, media system, system host power supply generally uses redundant power,
It realizes that power redundancy backup is conducive to improve stability, realizes Full Vehicle System high availability.
Traditional redundant power connection:
1, warm back-up, common this programme scheme is by 2 power supplys by being separately connected diode anode, with the side of disjunction gate
In formula parallel output to power bus, when wherein 1 power supply breaks down, the one-way conduction characteristic of diode be will not influence
The output of power bus.Disadvantage: when warm back-up, being equivalent to capacity redundancy, is unfavorable for improving the efficiency of power supply.Since power supply has
Working life, two power supplys are had little significance to the reliability for improving power supply.
2, cold standby, common this programme is to realize that output is automatically switched, it is ensured that same by the conducting of chip controls MOSFET
Moment only has one block of power supply to export to power bus.Shortcoming, the cold standby realized with chip, cannot independently set chip
Meter is to realize that once, wafer damage, whole system will paralyse in load end addition chip on single power panel.And cost
It is higher.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of efficiency, realization output that can be conducive to improve power supply
The dual power supply redundancy cold standby circuit that reliably there is power supply status to export for automatic switchover and system.
The present invention is to solve above-mentioned technical problem by the following technical programs: a kind of dual power supply redundancy cold standby is free of discontinuities
Switching circuit, includes detection and output control circuit, metal-oxide-semiconductor driving circuit, fault detection and control signal feedback circuit,
Middle detection is all connected to metal-oxide-semiconductor driving circuit, voltage input with output control circuit, fault detection and control signal feedback circuit
Output passes through metal-oxide-semiconductor driving circuit.
As a specific technical scheme, the detection and output control circuit include zener diode ZD1 and comparison circuit,
Comparison circuit includes comparator U1A and peripheral resistance R1, R4, R5, capacitor C1, diode D3, the resistance R1 and diode D3
It is connected between the power end and in-phase end of comparator U1A, wherein the cathode of diode D3 connects the in-phase end of comparator U1A, surely
The cathode of pressure diode ZD1 is connected between resistance R1 and the node of diode D3, the plus earth of zener diode ZD1, than
In-phase end compared with device U1A inputs SW signal, and the reverse side of comparator U1A passes through resistance R4 input reference voltage signal Vref, electricity
Resistance R5 is connected between the power end and output end of comparator U1A, and capacitor C1 is connected to the power end and ground GND of comparator U1A
Between.
As a specific technical scheme, also connect between the anode of the zener diode ZD1 and the in-phase end of comparator U1A
Meet a resistance R2.
As a specific technical scheme, the metal-oxide-semiconductor driving circuit includes metal-oxide-semiconductor Q1, diode D1, zener diode
ZD3, resistance R3, the end G of metal-oxide-semiconductor Q1 and the end S bridging diode D1 and zener diode ZD3, wherein the anode of diode D1 connects
The cathode at the end S of metal-oxide-semiconductor Q1, diode D1 is connect with the cathode of zener diode ZD3, and the anode of zener diode ZD3 meets MOS
The end G of pipe Q1, the one end resistance R3 connect the end G of metal-oxide-semiconductor Q1, the output end of another termination comparator U1A, the S termination of metal-oxide-semiconductor Q1
The end D of D the termination power VCC1, metal-oxide-semiconductor Q1 of power supply VCC, metal-oxide-semiconductor Q1 are also connected with two poles being made of several diodes in parallel
The anode of pipe group D4, the cathode of diode group D4 is as power output end VCC-OUT.
As a specific technical scheme, fault detection and control signal feedback circuit include comparator U1B, resistance R6, R7,
The in-phase end of R8, R9, R10, R11, R13, diode D5, D6, D7, D8, voltage regulator circuit, comparator U1B pass through concatenated resistance
R10 and R8 ground connection, the cathode of the Node connectedness diode D8 of resistance R10 and R8, the anode connection power supply VCC1 of diode D8 should
Power supply VCC1 is provided by the end D of metal-oxide-semiconductor Q1, and the reverse side of comparator U1B is grounded by concatenated resistance R11 and R13, resistance
The node of R11 and R13 meets power supply VCC by voltage regulator circuit, at reference voltage Vref sampling at the node of resistance R11 and R13,
Resistance R11 connects the reverse side of comparator U1A with the node of R13 by resistance R4, and power supply VCC is mentioned by the end S of metal-oxide-semiconductor Q1
For connecting resistance R6 between the power supply VCC input terminal of comparator U1B and the output end of comparator U1B, the cathode of diode D7 connects
The output end of comparator U1B, one end of the positive connecting resistance R9 of diode D7, and the other end of resistance R9 meet diode D6 simultaneously
Cathode and resistance R7 one end, the anode of diode D6 meets power supply VCC, the other end ground connection of resistance R7.Diode D7 is just
Output end of the pole as Out signal, the output end of comparator U1A connect the in-phase end of comparator U1B, and two poles by diode D5
The anode of pipe D5 connects the output end of comparator U1A.
As a specific technical scheme, which includes resistance R12, diode D9 and zener diode ZD2, described
The first termination power of resistance R12 VCC, the node of the second terminating resistor R11 and R13, the positive connecting resistance R12 second of diode D9
End, the cathode of diode D9 connect the cathode of zener diode ZD2, the plus earth of zener diode ZD2.
The present invention has the advantage that compared with prior art
1, the present invention realizes mainframe box power redundancy backup in industry, power supply redundancy single board design is realized, on veneer
It realizes switching circuit, meets equipment and replace faulty power module in case of constant power.
2, the present invention is built using common and without particular/special requirement Passive components, and simple and reliable, environmental requirement is low.
3, the present invention has increased power supply shape output signal newly, and system can detect the situation of all power supplys in time, be conducive to correlation
Personnel replace faulty power supply in time, have ensured equipment high reliability.
4, present invention design is not necessarily to add in power panel design, is meeting in voltage requirements, can be with any design method
Power supply collocation, autonomous device can be made and be added in system, design is simple, without special specified power supply, it is widely applicable the features such as.
5, other opposite board power supply redundancies, which design the circuit present invention, has the characteristics that, is low in cost, easy realization.
Detailed description of the invention
Fig. 1 is the circuit block diagram for the dual power supply redundancy cold standby circuit that the present invention has power supply status output.
Fig. 2 is the circuit diagram for the dual power supply redundancy cold standby circuit that the present invention has power supply status output.
Fig. 3 is detection and output control circuit figure in Fig. 1.
Fig. 4 is the metal-oxide-semiconductor driving circuit figure in Fig. 1.
Fig. 5 is fault detection and control signal feedback circuit figure in Fig. 1.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Referring to Fig. 1, the dual power supply redundancy cold standby switching circuit free of discontinuities of the present embodiment includes that detection and output control
Circuit, metal-oxide-semiconductor driving circuit, fault detection and control signal feedback circuit, wherein detection and output control circuit, fault detection
It is all connected to metal-oxide-semiconductor driving circuit with control signal feedback circuit, voltage input output passes through metal-oxide-semiconductor driving circuit.
Referring also to Fig. 2 and Fig. 3, the detection and output control circuit include zener diode ZD1 and comparison circuit, than
It include comparator U1A and peripheral resistance R1, R4, R5, capacitor C1, diode D3, the resistance R1 and diode D3 string compared with circuit
It is associated between the power end and in-phase end of comparator U1A, wherein the cathode of diode D3 connects the in-phase end of comparator U1A, pressure stabilizing
The cathode of diode ZD1 is connected between resistance R1 and the node of diode D3, and the plus earth of zener diode ZD1 compares
The in-phase end of device U1A inputs SW signal, and the reverse side of comparator U1A passes through resistance R4 input reference voltage signal Vref, resistance
R5 is connected between the power end and output end of comparator U1A, capacitor C1 be connected to comparator U1A power end and ground GND it
Between.A resistance R2 is also connected between the anode of the zener diode ZD1 and the in-phase end of comparator U1A.
Zener diode ZD1 by choosing different voltages can realize corresponding work starting voltage threshold；Pass through two poles
Startup threshold voltage is sent to comparator U1A in-phase end the interference problem that can effectively solve between extraneous control signal by pipe D3.
Referring also to Fig. 2 and Fig. 4, the metal-oxide-semiconductor driving circuit include metal-oxide-semiconductor Q1, diode D1, zener diode ZD3,
Resistance R3.The end G of metal-oxide-semiconductor Q1 and the end S bridging diode D1 and zener diode ZD3, wherein the anode of diode D1 connects metal-oxide-semiconductor
The cathode at the end S of Q1, diode D1 is connect with the cathode of zener diode ZD3, and the anode of zener diode ZD3 meets metal-oxide-semiconductor Q1
The end G, the one end resistance R3 connect metal-oxide-semiconductor Q1 the end G, it is another termination comparator U1A output end.The S termination power of metal-oxide-semiconductor Q1
The end D of D the termination power VCC1, metal-oxide-semiconductor Q1 of VCC, metal-oxide-semiconductor Q1 are also connected with the diode group being made of several diodes in parallel
The anode of D4, the cathode of diode group D4 is as power output end VCC-OUT.
At the end G of metal-oxide-semiconductor Q1 and the end S bridging diode D1 and zener diode ZD3, the pressure of the Vgs of MOS can be effectively limited
Difference, due to diode D1 series voltage stabilizing diode in the voltage regulator circuit of diode D1, zener diode ZD3 and resistance R3 composition
ZD3 together, so the end G of metal-oxide-semiconductor Q1 and the end S can be always maintained at Vgs=Vz+Vf in voltage-stabiliser tube working range, Vgs value
Stablizing makes the internal resistance of metal-oxide-semiconductor Q1 keep a stable state, eliminate the internal resistance of metal-oxide-semiconductor Q1 and power supply VCC fluctuate it is directly proportional
Cogging phenomenon, the stabilization of Vgs value can effectively avoid high pressure and damage metal-oxide-semiconductor Q1, while the diode D1 concatenated again can be effective
Inhibit zener diode ZD3 forward current, to have the function that protect zener diode ZD3, realizes entire circuit work
High safeguard measure.
Referring also to Fig. 2 and Fig. 5, fault detection and control signal feedback circuit include comparator U1B, resistance R6, R7,
R8, R9, R10, R11, R13, diode D5, D6, D7, D8, voltage regulator circuit.The in-phase end of comparator U1B passes through concatenated resistance
R10 and R8 ground connection, the cathode of the Node connectedness diode D8 of resistance R10 and R8, the anode connection power supply VCC1 of diode D8 should
Power supply VCC1 is provided by the end D of metal-oxide-semiconductor Q1, and the reverse side of comparator U1B is grounded by concatenated resistance R11 and R13, resistance
The node of R11 and R13 meets power supply VCC by voltage regulator circuit, at reference voltage Vref sampling at the node of resistance R11 and R13,
Resistance R11 connects the reverse side of comparator U1A with the node of R13 by resistance R4, and power supply VCC is mentioned by the end S of metal-oxide-semiconductor Q1
For specifically, the voltage regulator circuit includes that resistance R12, diode D9 and zener diode ZD2, the resistance R12 first terminate electricity
Source VCC, the node of the second terminating resistor R11 and R13, the positive connecting resistance R12 second end of diode D9, the cathode of diode D9
Connect the cathode of zener diode ZD2, the plus earth of zener diode ZD2.The power supply VCC input terminal of comparator U1B and compare
Resistance R6 is connected between the output end of device U1B, the cathode of diode D7 connects the output end of comparator U1B, the anode of diode D7
One end of connecting resistance R9, and the other end of resistance R9 connects the cathode of diode D6 and one end of resistance R7 simultaneously, diode D6's
Anode connects power supply VCC, the other end ground connection of resistance R7.Output end of the anode of diode D7 as Out signal.
The output end of comparator U1A connects the in-phase end of comparator U1B by diode D5, and the anode of diode D5 connects ratio
Compared with the output end of device U1A.
Bus minimum voltage value and power supply are cut when zener diode ZD2 adjustable source by choosing different voltages switches
Bus voltage drop-out time when changing.As the power supply VCC1 signal of comparator U1B in-phase end in Fig. 5 is originated from the end D of metal-oxide-semiconductor Q1, electricity
The circuit of resistance R12, diode D9 and zener diode ZD2 composition keeps the reverse side voltage of comparator stable always in a determination
Value, the comparator U1B moment acquires the voltage difference of in-phase end and reverse side, when metal-oxide-semiconductor Q1 opens a way, the electricity of power supply VCC1
Pressure will be less than the reverse side voltage of comparator U1B, therefore the Out signal for connecting comparator U1B output end just will become 0 electricity
Flat, by the SW signal of Out signal access backup battery, the in-phase end level of backup battery comparator U1A can be forced to pull down
To 0 level, the U1B comparator of backup battery exports 0 level at this time, and metal-oxide-semiconductor Q1 is opened simultaneously, and backup battery exports rapidly to electricity
Local power supply work is substituted on source bus.Since metal-oxide-semiconductor conducting Q1 needs the regular hour, will appear in this way because power supply VCC is super
Preceding power supply VCC1 causes local power supply maloperation to close backup battery phenomenon, is believed by the output of local power supply U1A comparator
Number by diode D5 access comparator U1B in-phase end, can cleverly solve the problems, such as such appearance.
Referring to fig. 2, power failure output function, this is also one of bright spot of the invention.It is backed up in dual power supply redundancy practical
Have a kind of such phenomenon in work, be exactly main power source in work and backup power source has damaged.This is as found not in time
This phenomenon, dual power supply redundancy back up without in all senses, and the SW signal of Fig. 2 is combined with Out signal can effectively eliminate this phenomenon.
When local power supply output is normal and metal-oxide-semiconductor Q1 is connected, SW signal and Out signal are high level；When local power supply exports just
When often and metal-oxide-semiconductor Q1 damage is opened a way, SW signal is high level, Out signal is low level.Using this judgement, go out in main power source
When failure system can be accurately judged to power supply without output or redundant backup circuit it is problematic, to facilitate maintenance.In main electricity
When source works, the power supply Out signal of backup can be always maintained at high level, once there is low level in the power supply Out signal of backup, then
It can determine whether that backup battery breaks down, power supply is without outputing.System can prompt operator to replace backup battery in time.To effectively
The shutdown for avoiding system from occurring by abnormal electrical power supply ensure that the high reliability of total system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (3)
1. a kind of dual power supply redundancy cold standby switching circuit free of discontinuities, which is characterized in that include detection and output control circuit,
Metal-oxide-semiconductor driving circuit, fault detection and control signal feedback circuit, wherein detection and output control circuit, fault detection and control
Signal feedback circuit processed is all connected to metal-oxide-semiconductor driving circuit, and voltage input output passes through metal-oxide-semiconductor driving circuit；
The detection and output control circuit include zener diode ZD1 and comparison circuit, comparison circuit include comparator U1A and
Peripheral resistance R1, R4, R5, capacitor C1, diode D3, the resistance R1 and diode D3 are connected on the power end of comparator U1A
Between in-phase end, wherein the cathode of diode D3 connects the in-phase end of comparator U1A, and the cathode of zener diode ZD1 is connected to
Between resistance R1 and the node of diode D3, the plus earth of zener diode ZD1, the in-phase end input SW letter of comparator U1A
Number, the reverse side of comparator U1A is connected to the electricity of comparator U1A by resistance R4 input reference voltage signal Vref, resistance R5
Between source and output end, capacitor C1 is connected between the power end of comparator U1A and ground GND；
The metal-oxide-semiconductor driving circuit includes metal-oxide-semiconductor Q1, diode D1, zener diode ZD3, resistance R3, the end G of metal-oxide-semiconductor Q1 with
The end S bridges diode D1 and zener diode ZD3, and wherein the anode of diode D1 connects the end S of metal-oxide-semiconductor Q1, and diode D1's is negative
Pole is connect with the cathode of zener diode ZD3, and the anode of zener diode ZD3 connects the end G of metal-oxide-semiconductor Q1, the connection of the one end resistance R3
The end G of metal-oxide-semiconductor Q1, the output end of another termination comparator U1A, the D of S the termination power VCC, metal-oxide-semiconductor Q1 of metal-oxide-semiconductor Q1 terminate electricity
The end D of source VCC1, metal-oxide-semiconductor Q1 are also connected with the anode for the diode group D4 being made of several diodes in parallel, diode group D4
Cathode as power output end VCC-OUT；
Fault detection and control signal feedback circuit include comparator U1B, resistance R6, R7, R8, R9, R10, R11, R13, two poles
The in-phase end of pipe D5, D6, D7, D8, voltage regulator circuit, comparator U1B is grounded by concatenated resistance R10 and R8, resistance R10 and R8
Node connectedness diode D8 cathode, diode D8 anode connection power supply VCC1, power supply VCC1 by metal-oxide-semiconductor Q1 the end D
It provides, the reverse side of comparator U1B is grounded by concatenated resistance R11 and R13, and the node of resistance R11 and R13 pass through pressure stabilizing electricity
Road meets power supply VCC, is at reference voltage Vref sampling at the node of resistance R11 and R13, the node of resistance R11 and R13 pass through electricity
The reverse side of R4 connection comparator U1A is hindered, power supply VCC is provided by the end S of metal-oxide-semiconductor Q1, the power supply VCC input of comparator U1B
Resistance R6 is connected between end and the output end of comparator U1B, the cathode of diode D7 connects the output end of comparator U1B, diode
One end of the positive connecting resistance R9 of D7, and the other end of resistance R9 connects the cathode of diode D6 and one end of resistance R7 simultaneously, two
The anode of pole pipe D6 meets power supply VCC, and the other end of resistance R7 is grounded, output end of the anode of diode D7 as Out signal, than
Output end compared with device U1A connects the in-phase end of comparator U1B by diode D5, and the anode of diode D5 connects comparator U1A's
Output end；
When metal-oxide-semiconductor Q1 opens a way, the voltage of power supply VCC1 can be less than the reverse side voltage of comparator U1B, therefore connect ratio
Out signal compared with device U1B output end just will become 0 level, Out signal be accessed in the SW signal of backup battery, backup battery
The in-phase end level of comparator U1A can be forced to pull down to 0 level, and backup battery comparator U1B exports 0 level, metal-oxide-semiconductor at this time
Q1 is opened simultaneously, and backup battery substitutes local power supply work.
2. a kind of dual power supply redundancy cold standby switching circuit free of discontinuities according to claim 1, which is characterized in that described steady
It presses and is also connected with a resistance R2 between the anode of diode ZD1 and the in-phase end of comparator U1A.
3. a kind of dual power supply redundancy cold standby switching circuit free of discontinuities according to claim 1, which is characterized in that the pressure stabilizing
Circuit includes resistance R12, diode D9 and zener diode ZD2, the first termination power of resistance R12 VCC, second termination electricity
The node of R11 and R13, the positive connecting resistance R12 second end of diode D9 are hindered, the cathode of diode D9 meets zener diode ZD2
Cathode, the plus earth of zener diode ZD2.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109301918A (en) * | 2017-07-24 | 2019-02-01 | 沈阳广合科技有限公司 | A kind of seamless switching control circuit applied to two-way V-LOCK battery |
| CN109633291B (en) * | 2018-12-20 | 2020-11-27 | 兰州空间技术物理研究所 | Bias current main backup switching circuit in space electric field detection system |
| CN113655838B (en) * | 2021-08-17 | 2022-10-28 | 北京计算机技术及应用研究所 | Voltage-adjustable redundancy control circuit |
| CN114252800B (en) * | 2022-02-28 | 2022-05-27 | 深圳市暗能量电源有限公司 | Power Good signal control circuit with double-output Power supply and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049805A (en) * | 1990-05-25 | 1991-09-17 | International Business Machines Corporation | Voltage sensitive switch |
| CN1728499A (en) * | 2004-07-31 | 2006-02-01 | 华为技术有限公司 | Method and device of realizing hot plug for power distribution singleboard |
| CN102447302A (en) * | 2010-09-30 | 2012-05-09 | 苏州捷泰科信息技术有限公司 | Main-standby power supply switching control method and device |
| CN204721079U (en) * | 2015-04-20 | 2015-10-21 | 北京航天自动控制研究所 | Dual-power automatic switching and charging circuit |
-
2016
- 2016-08-31 CN CN201610792840.5A patent/CN106300642B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049805A (en) * | 1990-05-25 | 1991-09-17 | International Business Machines Corporation | Voltage sensitive switch |
| CN1728499A (en) * | 2004-07-31 | 2006-02-01 | 华为技术有限公司 | Method and device of realizing hot plug for power distribution singleboard |
| CN102447302A (en) * | 2010-09-30 | 2012-05-09 | 苏州捷泰科信息技术有限公司 | Main-standby power supply switching control method and device |
| CN204721079U (en) * | 2015-04-20 | 2015-10-21 | 北京航天自动控制研究所 | Dual-power automatic switching and charging circuit |
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