CN204538667U - A kind of direct current surge voltage clamp circuit with reverse connecting protection - Google Patents
A kind of direct current surge voltage clamp circuit with reverse connecting protection Download PDFInfo
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- CN204538667U CN204538667U CN201420571890.7U CN201420571890U CN204538667U CN 204538667 U CN204538667 U CN 204538667U CN 201420571890 U CN201420571890 U CN 201420571890U CN 204538667 U CN204538667 U CN 204538667U
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Abstract
The utility model discloses a kind of direct current surge voltage clamp circuit with reverse connecting protection, comprise the straight power supply VI of input, direct current output VO, the first voltage-stabiliser tube, the first to the second metal-oxide-semiconductor, controller; Controller is by sampling resistor voltage drop detection input voltage, detection input circuit electric current, detection output voltage; by the 5th resistor and the second capacitor drive first metal-oxide-semiconductor; again through controller Direct driver second metal-oxide-semiconductor; the one the second metal-oxide-semiconductor symmetries are composed in series ideal diode; by the conducting of controller Synchronization Control or cut-off; after the 3rd capacitor filtering, producing controlled direct current output VO, thus restarting after realizing reverse connecting protection, surge voltage clamper, overcurrent protection, fault.The utility model can realize multinomial defencive function, prevents unexpected reverse connecting protection, input overcurrent protection, and input undervoltage is protected, and the protection of input overvoltage surge, has low voltage difference, low-loss, the recoverable function of fault when normal work.
Description
Technical field
The utility model relates to DC power supply art, particularly a kind of direct current surge voltage clamp circuit with reverse connecting protection.
Background technology
The such as DC power supply system of Industry Control, the most equipment of automobile must process the high voltage surge of short time, keep the voltage-regulation in load, avoid sensitive circuit to incur danger the damage of transition simultaneously.
The iron core inductor that conventional protection scheme needs use one to connect and high level electrolysis by-pass capacitor, and be aided with a high power Transient Voltage Suppressor (TVS) and fuse.The method of this clumsiness needs to take a large amount of board area resources, and huge inductor and capacitor are usually assemblies the highest in system.
Even if having employed this type of protection scheme can not provide protective action for reverse input voltage or line under-voltage (these are all the situations likely met with in automotive environment).For avoiding suffering the damage of these situations and keeping the consideration of output voltage, designer has set up an isolating diode usually, but the increase that can cause power loss falls in extra voltage during this diode current flow.
Therefore, design this cover new-type circuit just for complete solution load protection, export the control kept, and there is compact, compact, the advantage of minimum power loss.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of direct current surge voltage clamp circuit with reverse connecting protection; when DC power system non-normal working; clamp is from the surge voltage of input, and protection rear end DC/DC transducer or load, improve the reliability of system.
In order to realize the object solved the problems of the technologies described above, the utility model have employed following technical scheme:
With a direct current surge voltage clamp circuit for reverse connecting protection, comprise input DC power VI, direct current exports VO, the first voltage-stabiliser tube (5), the first metal-oxide-semiconductor (8), the second metal-oxide-semiconductor (10), controller (16);
Input DC power VI anode connects one end of the first resistor (1), one end of 4th resistor (4), the drain electrode of the first metal-oxide-semiconductor (8), input DC power VI negative terminal connects output DC power supply VO negative terminal, one end of 3rd resistor (3), the anode of the first voltage-stabiliser tube (5), one end of first capacitor (6), one end of second capacitor (7), one end of 3rd capacitor (12), one end of 8th resistor (14), one end of 4th capacitor (15), 12 pin of controller (16) and 13 pin and 14 pin, the other end of the first resistor (1) connects one end of the second resistor (2), 2 pin of controller (16), the other end of the second resistor (2) connects the other end of the 3rd resistor (3), 1 pin of controller (16), the other end of the 4th resistor (4) connects the negative electrode of the first voltage-stabiliser tube (5), the other end of the first capacitor (6), 3 pin of controller (16) and 4 pin, the grid of the first metal-oxide-semiconductor (8) connects one end of the 5th resistor (9), and the other end of the 5th resistor (9) connects the other end of the second capacitor (7), 5 pin of controller (16), the source electrode of the first metal-oxide-semiconductor (8) connects the source electrode of the second metal-oxide-semiconductor (10), 6 pin of controller (16), 7 pin of the grid connection control device (16) of the second metal-oxide-semiconductor (10), 8 pin of the drain electrode connection control device (16) of the second metal-oxide-semiconductor (10), one end of 6th resistor (11), exports the other end that DC power supply VO anode connects the 6th resistor (11), one end of 7th resistor (13), the positive pole of the 4th capacitor (15), 9 pin of controller (16), 11 pin of the other end connection control device (16) of the 3rd capacitor (12), the other end of the 8th resistor (14) connects the other end of the 7th resistor (13), 10 pin of controller (16).
With a direct current surge voltage clamp circuit for reverse connecting protection, described controller (16), its pin definitions is: pin 1 is OV; pin 2 is UV, and pin 3 is SHDN, and pin 4 is VCC; pin 5 is HGATE, and pin 6 is SOURCE, and pin 7 is DGATE; pin 8 is SENSE, and pin 9 is OUT, and pin 10 is FB; pin 11 is TMR; pin 12 is GND, and pin 13 is GND, and pin 14 is GND.
With a direct current surge voltage clamp circuit for reverse connecting protection, described DC power supply (VI) voltage is 12VDC or 28VDC.
By adopting technique scheme, the utility model has following beneficial effect:
The utility model is with the surge voltage clamp protection circuits of anti-reverse function to realize multinomial defencive function to the power supply that direct current inputs by adding; prevent unexpected reverse connecting protection; input overcurrent protection; input undervoltage is protected; the protection of input overvoltage surge; there is low voltage difference, low-loss, the recoverable function of fault when normal work.
Accompanying drawing explanation
Fig. 1 is the surge voltage-suppressing circuit schematic diagram of the anti-reverse function of band of this patent.
Fig. 2 is the application principle figure of the surge voltage clamp circuit being with anti-reverse function.
In Fig. 1, VI-direct current inputs, VO-direct current exports, DC power supply VI, direct current exports VO, 1-first resistor (1), 2-second resistor (2), 3-the 3rd resistor (3), 4-the 4th resistor (4), 5-first voltage-stabiliser tube (5), 6-first capacitor (6), 7-second capacitor (7), 8-first metal-oxide-semiconductor (8), 9-the 5th resistor (9), 10-second metal-oxide-semiconductor (10), 11-the 6th resistor (11), 12-the 3rd capacitor (12), 13-the 7th resistor (13), 14-the 8th resistor (14), 15-the 4th capacitor (15), 16-controller (16).
In Fig. 2, the surge voltage clamp circuit of 1-with anti-reverse function, 2-capacitor, 3-DC/DC transducer, 4-capacitor, 5-resistor.
Embodiment
Below in conjunction with accompanying drawing, further explanation is explained to this patent.But the protection range of this patent is not limited to concrete execution mode.
Embodiment 1
As shown in Figure 1, a kind of direct current surge voltage clamp circuit with reverse connecting protection of this patent, concrete structure is: input DC power VI anode connects one end of the first resistor (1), one end of 4th resistor (4), the drain electrode of the first metal-oxide-semiconductor (8), input DC power VI negative terminal connects output DC power supply VO negative terminal, one end of 3rd resistor (3), the anode of the first voltage-stabiliser tube (5), one end of first capacitor (6), one end of second capacitor (7), one end of 3rd capacitor (12), one end of 8th resistor (14), one end of 4th capacitor (15), 12 pin of controller (16) and 13 pin and 14 pin, the other end of the first resistor (1) connects one end of the second resistor (2), 2 pin of controller (16), the other end of the second resistor (2) connects the other end of the 3rd resistor (3), 1 pin of controller (16), the other end of the 4th resistor (4) connects the negative electrode of the first voltage-stabiliser tube (5), the other end of the first capacitor (6), 3 pin of controller (16) and 4 pin, the grid of the first metal-oxide-semiconductor (8) connects one end of the 5th resistor (9), and the other end of the 5th resistor (9) connects the other end of the second capacitor (7), 5 pin of controller (16), the source electrode of the first metal-oxide-semiconductor (8) connects the source electrode of the second metal-oxide-semiconductor (10), 6 pin of controller (16), 7 pin of the grid connection control device (16) of the second metal-oxide-semiconductor (10), 8 pin of the drain electrode connection control device (16) of the second metal-oxide-semiconductor (10), one end of 6th resistor (11), exports the other end that DC power supply VO anode connects the 6th resistor (11), one end of 7th resistor (13), the positive pole of the 4th capacitor (15), 9 pin of controller (16), 11 pin of the other end connection control device (16) of the 3rd capacitor (12), the other end of the 8th resistor (14) connects the other end of the 7th resistor (13), 10 pin of controller (16).
Controller (16), its pin definitions is: pin 1 is OV, and pin 2 is UV, pin 3 is SHDN, and pin 4 is VCC, and pin 5 is HGATE, pin 6 is SOURCE, and pin 7 is DGATE, and pin 8 is SENSE, pin 9 is OUT, pin 10 is FB, and pin 11 is TMR, and pin 12 is GND, pin 13 is GND, and pin 14 is GND.
A kind of direct current surge voltage clamp circuit with reverse connecting protection of the present utility model; its working method is: when the DC power supply of input starts; the voltage-dividing detection circuit that controller (16) consists of the first resistor (1), the second resistor (2), the 3rd resistor (3), the 6th resistor (11), the 7th resistor (13), the 8th resistor (14) detects input voltage working condition; input voltage is controlled by protective circuit in normal range (NR), then exports to rear end DC/DC transducer or sensitive loads.
When input terminal voltage is normal, controller (16) controls the first metal-oxide-semiconductor (8) and the second metal-oxide-semiconductor (10) normally, and input voltage exports after first metal-oxide-semiconductor (8) of normally, the second metal-oxide-semiconductor (10) and the 6th resistor (11) again.
When input terminal voltage is under-voltage, controller (16) controls the first metal-oxide-semiconductor (8) and the second metal-oxide-semiconductor (10) cut-off, and constrained input disconnects, and exports and can not instead fill with to input.
When input overvoltage surge, controller (16) is by the dividing potential drop of collection the 7th resistor (13) and the 8th resistor (14), control the first metal-oxide-semiconductor (8) and carry out input voltage clamp, by unnecessary voltage drop on the first metal-oxide-semiconductor (8), convert heat energy to dissipate, and output will be clamped in normal range (NR).
When input circuit overcurrent, the pressure drop that controller (16) is arranged by sampling anode the 6th resistor (11), controls the first metal-oxide-semiconductor (8) and the second metal-oxide-semiconductor (10) cut-off in time, thus protection rear end DC/DC transducer and load.
When input overvoltage surge and overcurrent occur for a long time, controller (16) can be attempted starting under low-down initiation culture, both can ensure that the first metal-oxide-semiconductor (8) and the second metal-oxide-semiconductor (10) had enough cooling times and do not damage after being turned off because of fault, and ensure again to reset automatically.
When the reversal connection of input both positive and negative polarity, the negative voltage that controller (16) self can bear-40V does not damage, and controls the first metal-oxide-semiconductor (8) and the second metal-oxide-semiconductor (10) cut-off, and constrained input disconnects, and could recover normal work after must removing fault.
When input DC power VI is normal, electric current produces burning voltage by the 4th resistance at voltage-stabiliser tube and the first capacitor two ends and powers to controller, controller passes through sampling first to the 3rd resistor voltage drop detection input voltage, to sample the 6th resistor voltage drop detection input circuit electric current, to sample the 7th to the 8th resistor voltage drop detection output voltage, by the 5th resistor and the second capacitor drive first metal-oxide-semiconductor, again through controller Direct driver second metal-oxide-semiconductor, the one the second metal-oxide-semiconductor symmetries are composed in series ideal diode, by the conducting of controller Synchronization Control or cut-off, controlled direct current output VO is being produced after the 3rd capacitor filtering, thus realize reverse connecting protection, surge voltage clamper, overcurrent protection, restart after fault.
The utility model is with the surge voltage clamp protection circuits of anti-reverse function to realize multinomial defencive function at the power supply of direct current input by adding; prevent unexpected reverse connecting protection; input overcurrent protection; input undervoltage is protected; the protection of input overvoltage surge; there is low voltage difference, low-loss, the recoverable function of fault when normal work.
Claims (3)
1. the direct current surge voltage clamp circuit with reverse connecting protection, is characterized in that: comprise input DC power VI, and direct current exports VO, the first voltage-stabiliser tube (5), the first metal-oxide-semiconductor (8), the second metal-oxide-semiconductor (10), controller (16);
Input DC power VI anode connects one end of the first resistor (1), one end of 4th resistor (4), the drain electrode of the first metal-oxide-semiconductor (8), input DC power VI negative terminal connects output DC power supply VO negative terminal, one end of 3rd resistor (3), the anode of the first voltage-stabiliser tube (5), one end of first capacitor (6), one end of second capacitor (7), one end of 3rd capacitor (12), one end of 8th resistor (14), one end of 4th capacitor (15), 12 pin of controller (16) and 13 pin and 14 pin, the other end of the first resistor (1) connects one end of the second resistor (2), 2 pin of controller (16), the other end of the second resistor (2) connects the other end of the 3rd resistor (3), 1 pin of controller (16), the other end of the 4th resistor (4) connects the negative electrode of the first voltage-stabiliser tube (5), the other end of the first capacitor (6), 3 pin of controller (16) and 4 pin, the grid of the first metal-oxide-semiconductor (8) connects one end of the 5th resistor (9), and the other end of the 5th resistor (9) connects the other end of the second capacitor (7), 5 pin of controller (16), the source electrode of the first metal-oxide-semiconductor (8) connects the source electrode of the second metal-oxide-semiconductor (10), 6 pin of controller (16), 7 pin of the grid connection control device (16) of the second metal-oxide-semiconductor (10), 8 pin of the drain electrode connection control device (16) of the second metal-oxide-semiconductor (10), one end of 6th resistor (11), exports the other end that DC power supply VO anode connects the 6th resistor (11), one end of 7th resistor (13), the positive pole of the 4th capacitor (15), 9 pin of controller (16), 11 pin of the other end connection control device (16) of the 3rd capacitor (12), the other end of the 8th resistor (14) connects the other end of the 7th resistor (13), 10 pin of controller (16).
2. the direct current surge voltage clamp circuit of band reverse connecting protection according to claim 1, is characterized in that: described controller (16), and its pin definitions is: pin 1 is OV; pin 2 is UV, and pin 3 is SHDN, and pin 4 is VCC; pin 5 is HGATE, and pin 6 is SOURCE, and pin 7 is DGATE; pin 8 is SENSE, and pin 9 is OUT, and pin 10 is FB; pin 11 is TMR; pin 12 is GND, and pin 13 is GND, and pin 14 is GND.
3. the direct current surge voltage clamp circuit according to claim 1 with reverse connecting protection, is characterized in that: described DC power supply (VI) voltage is 12VDC or 28VDC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571890.7U CN204538667U (en) | 2014-09-30 | 2014-09-30 | A kind of direct current surge voltage clamp circuit with reverse connecting protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571890.7U CN204538667U (en) | 2014-09-30 | 2014-09-30 | A kind of direct current surge voltage clamp circuit with reverse connecting protection |
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| Publication Number | Publication Date |
|---|---|
| CN204538667U true CN204538667U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571890.7U Expired - Fee Related CN204538667U (en) | 2014-09-30 | 2014-09-30 | A kind of direct current surge voltage clamp circuit with reverse connecting protection |
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| Country | Link |
|---|---|
| CN (1) | CN204538667U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319739A (en) * | 2014-09-30 | 2015-01-28 | 洛阳隆盛科技有限责任公司 | DC surge voltage clamping circuit with reversal connection protection |
| CN106533144A (en) * | 2016-10-28 | 2017-03-22 | 海能达通信股份有限公司 | Reverse connection and current backfeed prevention circuit |
| CN110462956A (en) * | 2017-02-16 | 2019-11-15 | 德恩塞两合公司 | The electronic insurance equipment of load for can connect on low-voltage DC voltage electric grid |
-
2014
- 2014-09-30 CN CN201420571890.7U patent/CN204538667U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319739A (en) * | 2014-09-30 | 2015-01-28 | 洛阳隆盛科技有限责任公司 | DC surge voltage clamping circuit with reversal connection protection |
| CN106533144A (en) * | 2016-10-28 | 2017-03-22 | 海能达通信股份有限公司 | Reverse connection and current backfeed prevention circuit |
| CN106533144B (en) * | 2016-10-28 | 2019-03-05 | 海能达通信股份有限公司 | Anti-reverse and current flowing backwards circuit |
| CN110462956A (en) * | 2017-02-16 | 2019-11-15 | 德恩塞两合公司 | The electronic insurance equipment of load for can connect on low-voltage DC voltage electric grid |
| CN110462956B (en) * | 2017-02-16 | 2022-03-01 | 德恩塞两合公司 | Electronic safety device for a load that can be connected to a low-voltage direct-voltage network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20190930 |