CN203387163U - Protection circuit with branch outputting overvoltage turning-off power supply - Google Patents
Protection circuit with branch outputting overvoltage turning-off power supply Download PDFInfo
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- CN203387163U CN203387163U CN201320474188.4U CN201320474188U CN203387163U CN 203387163 U CN203387163 U CN 203387163U CN 201320474188 U CN201320474188 U CN 201320474188U CN 203387163 U CN203387163 U CN 203387163U
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Abstract
The utility model discloses a protection circuit with branch outputting overvoltage turning-off power supply. The protection circuit comprises a resistor, a capacitor, a silicon controlled rectifier and a diode. The first connection terminal of the resistor, the first connection terminal of the capacitor and the cathode of the silicon controlled rectifier are grounded. The trigger electrode of the silicon controlled rectifier is connected to the second connection terminal of the resistor, the second connection terminal of the capacitor and the anode of the diode. The anode of the silicon controlled rectifier serves as a first voltage output terminal. The cathode of the diode serves as a second voltage output terminal. The technical scheme is that: the protection circuit with branch outputting overvoltage turning-off power supply is provided; the silicon controlled rectifier and the diode are utilized in the circuit to perform circuit overvoltage protection; and the two output terminals provided in the circuit enable the circuit to be accessed to a switch power supply easily; and the circuit is simple and low in cost, so that the protection circuit is applicable to the multipath-output switch power supply. The protection circuit with branch outputting overvoltage turning-off power supply can be widely applied to the field of switch power supplies.
Description
Technical field
The utility model relates to Switching Power Supply, especially a kind of protective circuit of branch road output overvoltage power cutoff.
Background technology
The Switching Power Supply product is widely used in that industrial automatic control, military industry equipment, research equipment, LED illumination, industrial control equipment, communication apparatus, power equipment, instrument and meter, Medical Devices, semiconductor refrigerating heat, air purifier, electronic refrigerator, liquid crystal display, the LED light fixture, communication apparatus, audio-visual products, security protection, computer housing, the fields such as digital product and instrument class.
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that the control switch transistor turns on and off maintains a kind of power supply of regulated output voltage, and Switching Power Supply generally by pulse width modulation (PWM), controls IC and MOSFET forms.
Switching Power Supply is compared with linear power supply, and the cost of the two all increases along with the increase of power output, but the two rate of rise is different.The linear power supply cost is on a certain power output point, on the contrary higher than Switching Power Supply.Along with development and the innovation of power electronic technology, make switch power technology in constantly innovation, this cost rollback point moves to low output power end day by day, and this provides development space widely for Switching Power Supply.
The Switching Power Supply high frequency is the direction of its development, and high frequency makes the Switching Power Supply miniaturization, and makes Switching Power Supply enter application widely, particularly in the application of high-technology field, has promoted miniaturization, the lighting of new high-tech product.In addition the development of Switching Power Supply be applied in energy savings, economize on resources and the protection of the environment aspect all has great importance.
Along with scientific and technical development, power electronic equipment and people's work, the relation of life are day by day close, and electronic equipment all be unable to do without reliable power supply, therefore direct-current switch power supply starts bringing into play more and more important effect, and in succession entering various electronics, electric equipment field, stored-program control exchange, communication, electron detection device power supply, control appliance power supply etc. have all been used direct-current switch power supply widely.Simultaneously along with many new and high technologies, comprise the development of the technology such as HF switch technology, soft switch technique, power factor correction technology, synchronous rectification, intellectualized technology, surface mounting technology, switch power technology is in constantly innovation, and this provides development space widely for direct-current switch power supply.But, due to control circuit more complicated in Switching Power Supply, the ability of transistor and integrated device tolerance electricity, thermal shock is poor, in use to the user, brings very big inconvenience.Safety for protection switch power supply self and load, according to principle and the characteristics of direct-current switch power supply, designed overtemperature protection, overcurrent protection, overvoltage protection and soft start protective circuit.
The utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is: provide the simple and cost of a kind of circuit structure the low protective circuit that realizes branch road output overvoltage power cutoff.
The technical scheme that the utility model adopts is: a kind of protective circuit of branch road output overvoltage power cutoff; include resistance, electric capacity, controllable silicon and diode; the first link of described resistance, the first link of electric capacity and the equal ground connection of silicon controlled negative electrode; described silicon controlled trigger electrode is connected to respectively the second link of resistance, the second link of electric capacity and the anode of diode; described silicon controlled anode is as the first voltage output end, and the negative electrode of described diode is as the second voltage output.
Further, described controllable silicon is one-way SCR.
Further, described controllable silicon is bidirectional triode thyristor.
Further, described diode is voltage stabilizing didoe.
Further, the resistance of described resistance is 100 ohm.
Further, described one-way SCR model is BT151-500R.
Further, the model of described voltage stabilizing didoe is 1N4712.
The beneficial effects of the utility model are: the protective circuit that the technical solution of the utility model is a kind of branch road output overvoltage power cutoff; its circuit utilizes controllable silicon and diode pair circuit overvoltage protection; and two output ports that provide make circuit can easily access Switching Power Supply; because its circuit is simple; cost is low, therefore can be used on the Switching Power Supply of multichannel output.
The accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
With reference to Fig. 1; a kind of protective circuit of branch road output overvoltage power cutoff; include resistance R 1, capacitor C 1, controllable silicon Q1 and diode ZD1; the equal ground connection of negative electrode of the first link of described resistance R 1, the first link of capacitor C 1 and controllable silicon Q1; the trigger electrode of described controllable silicon Q1 is connected to respectively the second link of resistance R 1, the second link of capacitor C 1 and the anode of diode ZD1; the anode of described controllable silicon Q1 is as the first voltage output end, and the negative electrode of described diode ZD1 is as the second voltage output.
With reference to Fig. 1; the operation principle of this circuit is: when the second output V02 output voltage, during higher than the voltage of ZD1, ZD1 will puncture conducting, and the trigger electrode of controllable silicon Q1 obtains trigger voltage; controllable silicon Q1 conducting; the first output V01 will shorted to earth, thereby makes short-circuit protection circuit or the current foldback circuit work of power supply, stops the work of whole power supply; after the V02 output overvoltage recovers; diode ZD1 will end, and controllable silicon Q1 also can end, and it is normal that power supply will recover.
From above-mentioned scheme, the protective circuit that the technical solution of the utility model is a kind of branch road output overvoltage power cutoff, therefore can be used on the Switching Power Supply of multichannel output, and cost is low, and circuit is simple.
Be further used as preferred embodiment, described controllable silicon Q1 is one-way SCR.
Be further used as preferred embodiment, described controllable silicon Q1 is bidirectional triode thyristor.
Be further used as preferred embodiment, described diode ZD1 is voltage stabilizing didoe.
Be further used as preferred embodiment, the resistance of described resistance R 1 is 100 ohm.
Be further used as preferred embodiment, described one-way SCR model is BT151-500R.
Be further used as preferred embodiment, the model of described voltage stabilizing didoe is 1N4712.
When resistance R 1 resistance is that 100 Ω, one-way SCR Q1 model are BT151-500R, voltage stabilizing didoe ZD1 model while being 1N4712, protective value the best of circuit.
More than that better enforcement of the present utility model is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art can also make all equivalents or replacement under the prerequisite without prejudice to the utility model spirit, and the distortion that these are equal to or replacement all are included in the application's claim limited range.
Claims (7)
1. the protective circuit of a branch road output overvoltage power cutoff, it is characterized in that: include resistance (R1), electric capacity (C1), controllable silicon (Q1) and diode (ZD1), the first link of described resistance (R1), the equal ground connection of negative electrode of the first link of electric capacity (C1) and controllable silicon (Q1), the trigger electrode of described controllable silicon (Q1) is connected to respectively the second link of resistance (R1), the anode of the second link of electric capacity (C1) and diode (ZD1), the anode of described controllable silicon (Q1) is as the first voltage output end, the negative electrode of described diode (ZD1) is as the second voltage output.
2. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 1, it is characterized in that: described controllable silicon (Q1) is one-way SCR.
3. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 1, it is characterized in that: described controllable silicon (Q1) is bidirectional triode thyristor.
4. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 1, it is characterized in that: described diode (ZD1) is voltage stabilizing didoe.
5. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 1, it is characterized in that: the resistance of described resistance (R1) is 100 ohm.
6. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 2, it is characterized in that: described one-way SCR model is BT151-500R.
7. the protective circuit of a kind of branch road output overvoltage power cutoff according to claim 4, it is characterized in that: the model of described voltage stabilizing didoe is 1N4712.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320474188.4U CN203387163U (en) | 2013-08-05 | 2013-08-05 | Protection circuit with branch outputting overvoltage turning-off power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320474188.4U CN203387163U (en) | 2013-08-05 | 2013-08-05 | Protection circuit with branch outputting overvoltage turning-off power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387163U true CN203387163U (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320474188.4U Expired - Fee Related CN203387163U (en) | 2013-08-05 | 2013-08-05 | Protection circuit with branch outputting overvoltage turning-off power supply |
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| CN (1) | CN203387163U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658843A (en) * | 2017-10-23 | 2018-02-02 | 江西美的贵雅照明有限公司 | Overvoltage crowbar and light fixture |
| CN114512958A (en) * | 2022-03-10 | 2022-05-17 | 群联电子股份有限公司 | Overvoltage protection device, memory storage device and overvoltage protection method |
| US20230283065A1 (en) * | 2022-03-07 | 2023-09-07 | Phison Electronics Corp. | Over-voltage protection device, memory storage device and over-voltage protection method |
-
2013
- 2013-08-05 CN CN201320474188.4U patent/CN203387163U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658843A (en) * | 2017-10-23 | 2018-02-02 | 江西美的贵雅照明有限公司 | Overvoltage crowbar and light fixture |
| CN107658843B (en) * | 2017-10-23 | 2023-11-14 | 美智光电科技股份有限公司 | Overvoltage protection circuit and lamp |
| US20230283065A1 (en) * | 2022-03-07 | 2023-09-07 | Phison Electronics Corp. | Over-voltage protection device, memory storage device and over-voltage protection method |
| CN114512958A (en) * | 2022-03-10 | 2022-05-17 | 群联电子股份有限公司 | Overvoltage protection device, memory storage device and overvoltage protection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN JINGFUYUAN TECH. CO., LTD. Free format text: FORMER NAME: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen Nanshan District City, Guangdong province 518055 white pine Luxili Nangang Second Industrial Park 12 Building 1, 2, 5 floor Patentee after: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. Address before: Shenzhen Nanshan District City, Guangdong province 518055 white pine Luxili Nangang Second Industrial Park 12 Building 1, 2, 5 floor Patentee before: Shenzhen Jingfuyuan Tech Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20190805 |
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| CF01 | Termination of patent right due to non-payment of annual fee |