CN113991601B - Output voltage short circuit protection circuit structure - Google Patents
Output voltage short circuit protection circuit structure Download PDFInfo
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- CN113991601B CN113991601B CN202111295905.2A CN202111295905A CN113991601B CN 113991601 B CN113991601 B CN 113991601B CN 202111295905 A CN202111295905 A CN 202111295905A CN 113991601 B CN113991601 B CN 113991601B
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- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 73
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 7
- 230000000670 limiting effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- 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
- H02H3/08—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 current
-
- 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
- H02H3/08—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 current
- H02H3/087—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 current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses an output voltage short circuit protection circuit structure which comprises a power supply, a power supply filtering module, an overcurrent protection module, an output voltage feedback module, an input control module, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a triode, a first MOS tube, an output voltage end, a feedback signal output end and an input switch signal end.
Description
Technical Field
The invention relates to a protection circuit structure, in particular to an output voltage short-circuit protection circuit structure.
Background
Along with the rapid development of industry, unmanned production line is popular, and during normal industrial control, the on-off of strong electricity is controlled through weak current, so that the safety of people is guaranteed, the output weak current signal faces to the controlled object, the general voltage is 24V, the output mode is a line pressing terminal, if the wiring worker is unknowingly short-circuited the output positive electrode and negative electrode, the voltage signal output short circuit is caused, the instantaneous current is increased, the components are burnt, the circuit board is damaged, and the potential safety hazard in field use is increased. Aiming at the situation in the field, a voltage output short-circuit prevention protection circuit is added to the voltage output port, so that the circuit board damage caused by output short-circuit is effectively prevented, but similar disclosure is not given in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an output voltage short circuit protection circuit structure which can effectively prevent a circuit board from being damaged due to output short circuit.
In order to achieve the above purpose, the output voltage short circuit protection circuit structure of the present invention includes a power supply, a power supply filtering module, an overcurrent protection module, an output voltage feedback module, an input control module, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a triode, a first MOS transistor, an output voltage terminal, a feedback signal output terminal and an input switch signal terminal;
The power supply is connected with one end of a first resistor and a base electrode of a triode through a power supply filtering module, an emitter electrode of the triode is connected with one end of a second resistor and an anode of a first diode, the other end of the second resistor is connected with a collector electrode of the triode, one end of a third resistor, one end of a first capacitor and a source electrode of a first MOS tube, a cathode electrode of the first diode is connected with one end of a fourth resistor, one end of the third resistor and a grid electrode of the first MOS tube, a drain electrode of the first MOS tube is connected with an output voltage end through the second diode, a drain electrode of the first MOS tube is connected with a feedback signal output end through an output voltage feedback module, the other end of the fourth resistor is connected with one end of a fifth resistor and one end of a sixth resistor through an input control module, the other end of the fifth resistor and the other end of the second resistor are connected with an overcurrent protection module, and the other end of the sixth resistor is connected with an input switch signal end.
The output voltage feedback module comprises a second capacitor, a first voltage stabilizing tube, a seventh resistor and an eighth resistor;
The drain electrode of the first MOS tube is connected with one end of a seventh resistor and the cathode of the first voltage stabilizing tube, one end of an eighth resistor and the anode of the first voltage stabilizing tube are grounded, and the other end of the seventh resistor and the other end of the eighth resistor are connected with the feedback signal output end.
The output voltage feedback module further comprises a second capacitor, and the second capacitor is connected with the first voltage stabilizing tube in parallel.
The output voltage feedback module further comprises a third capacitor, wherein the third capacitor is connected with the eighth resistor in parallel.
The input control module comprises a second MOS tube, a ninth resistor and a fourth capacitor;
The fourth resistor is connected with the drain electrode of the second MOS tube, the source electrode of the second MOS tube, one end of the ninth resistor and one end of the fourth capacitor are grounded, and the grid electrode of the second MOS tube, the other end of the ninth resistor, the other end of the fourth capacitor and the fifth resistor are connected with the sixth resistor.
The circuit is characterized by further comprising a bidirectional diode, one end of the bidirectional diode is connected with a circuit between the sixth resistor and the fourth capacitor, and the other end of the bidirectional diode is connected with the fifth resistor.
The overcurrent protection module comprises a third MOS tube, a fifth capacitor, a tenth resistor, an eleventh resistor, a sixth capacitor and a second voltage stabilizing tube;
The fifth resistor is connected with the drain electrode of the third MOS tube and one end of the fifth capacitor, the other end of the fifth capacitor is connected with one end of the tenth resistor, the source electrode of the third MOS tube at the other end of the tenth resistor, one end of the eleventh resistor, one end of the sixth capacitor and the positive electrode of the second voltage stabilizing tube are grounded, and the other end of the eleventh resistor, the other end of the sixth capacitor, the negative electrode of the second voltage stabilizing tube and the grid electrode of the third MOS tube are connected with the second resistor.
The power supply filtering module comprises a seventh capacitor and an eighth capacitor;
The power supply is connected with one end of the seventh capacitor, one end of the eighth capacitor and the emitter of the triode, and the other end of the seventh capacitor and the other end of the eighth capacitor are grounded.
When the current flowing through the first resistor is reduced, the voltage drop of the first resistor is reduced, the triode is not conducted, the voltage on the second resistor is reduced, the third MOS tube is not conducted, the second MOS tube is conducted by the switch input signal, the first MOS tube is conducted under the voltage division and current limitation effects of the third resistor and the fourth resistor, and the voltage signal is normally output.
When the third MOS tube is turned on, the voltage of the grid electrode input into the second MOS tube is reduced due to the voltage division effect of the fifth resistor, and the second MOS tube is reliably turned off.
The invention has the following beneficial effects:
When the output voltage short circuit protection circuit structure is specifically operated, when the output terminal is in short circuit, the first MOS tube is disconnected, the output power supply is automatically cut off, the interface device is prevented from being burnt, and in addition, the reverse series voltage in the channel is prevented from affecting the triode and the overcurrent protection module through the first diode, so that the phenomenon that the circuit board is damaged due to the output short circuit is effectively prevented, and the output voltage short circuit protection circuit structure is simple in structure, convenient to operate and extremely high in practicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The application will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The following detailed description is exemplary and is intended to provide further details of the application. Unless defined otherwise, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the application.
Referring to fig. 1, the output voltage short-circuit protection circuit structure of the present invention includes a power supply, a power supply filtering module, an overcurrent protection module, an output voltage feedback module, an input control module, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a triode Q2, a first MOS Q1, an output voltage terminal pwr_dout1, a feedback signal output terminal @ do_back1, and an input switch signal terminal do_out1;
The power supply is connected with one end of a first resistor R1 and a base electrode of a triode Q2 through a power supply filter module, an emitter electrode of the triode Q2 is connected with one end of a second resistor R2 and an anode electrode of a first diode D3, the other end of the second resistor R2 is connected with a collector electrode of the triode Q2, one end of a third resistor R3, one end of a first capacitor C1 and a source electrode of a first MOS transistor Q1, a cathode electrode of the first diode D3 is connected with one end of a fourth resistor R4, one end of the third resistor R3 and a grid electrode of the first MOS transistor Q1, a drain electrode of the first MOS transistor Q1 is connected with an output voltage end PWR_DOUT1 through a second diode D4, a drain electrode of the first MOS transistor Q1 is connected with a feedback signal output end @ DO_back1 through an output voltage feedback module, the other end of the fourth resistor R4 is connected with one end of a fifth resistor R5 and one end of a sixth resistor R6 through an input control module, the other end of the fifth resistor R5 and the other end of the second resistor R2 are connected with an OUT1 through a drain protection module.
The output voltage feedback module comprises a second capacitor C2, a seventh resistor R7, a first voltage stabilizing tube D1, an eighth resistor R8 and a third capacitor C3;
The drain electrode of the first MOS tube Q1 is connected with one end of a second capacitor C2, one end of a seventh resistor R7 and the negative electrode of the first voltage stabilizing tube D1, the other end of the second capacitor C2, one end of an eighth resistor R8, the positive electrode of the first voltage stabilizing tube D1 and one end of a third capacitor C3 are grounded, and the other end of the seventh resistor R7, the other end of the eighth resistor R8 and the other end of the third capacitor C3 are connected with a feedback signal output end @ DO_back 1.
The input control module comprises a second MOS tube Q3, a ninth resistor R9, a fourth capacitor C4 and a bidirectional diode D5;
the fourth resistor R4 is connected with the drain electrode of the second MOS tube Q3, the source electrode of the second MOS tube Q3, one end of the ninth resistor R9 and one end of the fourth capacitor C4 are grounded, and the grid electrode of the second MOS tube Q3, the other end of the ninth resistor R9, the other end of the fourth capacitor C4 and one end of the bidirectional diode D5 are connected with the sixth resistor R6.
The overcurrent protection module comprises a third MOS tube Q4, a fifth capacitor C5, a tenth resistor R10, an eleventh resistor R1, a sixth capacitor C6 and a second voltage stabilizing tube D2;
The fifth resistor R5 is connected with the drain electrode of the third MOS tube Q4 and one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is connected with one end of a tenth resistor R10, the source electrode of the third MOS tube Q4 at the other end of the tenth resistor R10, one end of an eleventh resistor R11, one end of a sixth capacitor C6 and the positive electrode of the second voltage stabilizing tube D2 are grounded, and the other end of the eleventh resistor R11, the other end of the sixth capacitor C6, the negative electrode of the second voltage stabilizing tube D2 and the grid electrode of the third MOS tube Q4 are connected with the second resistor R2.
The power supply filter module comprises a seventh capacitor C7 and an eighth capacitor C8, wherein a power supply is connected with one end of the seventh capacitor C7, one end of the eighth capacitor C8 and an emitter of the triode Q2, and the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are grounded.
The working principle of the invention is as follows:
When the external output terminal is short-circuited, the feedback signal is at low level, and the third capacitor C3 acts as voltage stabilizing and filtering. The seventh capacitor C7 and the eighth capacitor C8 function as power filtering. The first resistor R1 plays a role in setting a current threshold, when the output voltage end PWR_DOUT1 is short-circuited with the ground, the instantaneous output current exceeds a set threshold value, the triode Q2 is conducted, the level of the second resistor R2 becomes high, the third MOS tube Q4 is conducted, an input switching signal of the input switching signal end DO_OUT1 is pulled to the ground through the bidirectional diode D5 and the fifth resistor R5, the grid voltage of the second MOS tube Q3 is lower than the conducting voltage of the second MOS tube Q3, the second MOS tube Q3 is closed, and the first MOS tube Q1 is closed, so that the overcurrent protection effect is achieved. When the current flowing through the first resistor R1 decreases, the voltage drop of the first resistor R1 decreases, the triode Q2 cannot be turned on, at this time, the voltage on the second resistor R2 decreases, the third MOS transistor Q4 is not turned on, the second MOS transistor Q3 is turned on by the switch input signal, the first MOS transistor Q1 is turned on by the voltage dividing and current limiting effects of the third resistor R3 and the fourth resistor R4, and the voltage signal is normally output. The third resistor R3 and the fourth resistor R4 play a role in voltage division, the first capacitor C1 plays a role in voltage stabilization, the grid electrode of the first MOS tube Q1 is protected, and reliable on or off of the first MOS tube Q1 is ensured. The second MOS transistor Q3 is associated with the first MOS transistor Q1 in the whole circuit. When the second MOS transistor Q3 is turned on, the first MOS transistor Q1 is necessarily turned on, and when the triode Q2 is turned on, the third MOS transistor Q4 is necessarily turned on.
The first MOS transistor Q1, the triode Q2, the second MOS transistor Q3 and the third MOS transistor Q4 play a role in switching, and the main role of the first diode D3 is to ensure that the working switching state of the third MOS transistor Q4 is not influenced by output voltage under the normal working state of a circuit. The ninth resistor R9 is a pull-down resistor, and when the second MOS tube Q3 is in an off state, the gate of the second MOS tube Q3 is ensured to be reliably grounded; the bidirectional diode D5 prevents the third MOS transistor Q4 from having an inverse signal to affect the operating state of the second MOS transistor Q3. The fifth resistor R5 plays roles of current limiting and voltage division, and when the third MOS tube Q4 is conducted, the voltage of the grid electrode input into the second MOS tube Q3 is reduced due to the voltage division of the fifth resistor R5, and the second MOS tube Q3 is reliably turned off; the fifth capacitor C5 and the tenth resistor R10 play a role in filtering, and the eleventh resistor R11 is a pull-down resistor of the third MOS tube Q4, so that the third MOS tube Q4 is ensured to be reliably turned off. The sixth capacitor C6 mainly plays a role in filtering and voltage stabilization. The second voltage stabilizing tube D2 plays a role in stabilizing the grid voltage of the third MOS tube Q4.
When the output is in a short circuit state with the ground, the current flowing through the first resistor R1 is increased, so that the triode Q2 is conducted, the third MOS tube Q4 is conducted, an input switching signal is grounded, the second MOS tube Q3 is disconnected, the first MOS tube Q1 is disconnected, and the output of the whole circuit is disconnected. When the current flowing through the first resistor R1 decreases, the triode Q2 is turned off, so that the third MOS transistor Q4 is turned off, and the input switch signal controls the second MOS transistor Q3 to operate, so that the first MOS transistor Q1 starts to operate. But the output is shorted to ground so that the instantaneous current through the first resistor R1 increases, resulting in the transistor Q2 being turned on, and the circuit is operated in the above two states repeatedly at all times when in the shorted state.
The input switch signal controls the second MOS tube Q3 and the first MOS tube Q1, and controls the voltage output of the circuit, thereby achieving the purpose of control. However, when the external short circuit occurs, the instantaneous current flowing through the first resistor R1 is too large, and the triode Q2 and the third MOS transistor Q4 are turned on, so that the whole circuit is turned off, thereby playing a role in protecting the output circuit.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (7)
1. The output voltage short-circuit protection circuit structure is characterized by comprising a power supply, a power supply filtering module, an overcurrent protection module, an output voltage feedback module, an input control module, a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a triode (Q2), a first MOS tube (Q1), an output voltage end (PWR_DOUT1), a feedback signal output end (@ DO_back 1) and an input switch signal end (DO_OUT1);
The power supply is connected with one end of a first resistor (R1) and an emitter of a triode (Q2) through a power supply filtering module, a collector of the triode (Q2) is connected with one end of a second resistor (R2) and an anode of a first diode (D3), the other end of the first resistor (R1) is connected with a base electrode of the triode (Q2), one end of a third resistor (R3), one end of a first capacitor (C1) and a source electrode of the first MOS transistor (Q1), a cathode of the first diode (D3) is connected with one end of a fourth resistor (R4), one end of the third resistor (R3), a grid electrode of the first MOS transistor (Q1) and the other end of the first capacitor (C1), a drain electrode of the first MOS transistor (Q1) is connected with an output voltage end (PWR_DOUT1) through a second diode (D4), a drain electrode of the first MOS transistor (Q1) is connected with a feedback signal output end (DO_back1) through an output voltage feedback module, a drain electrode of the first MOS transistor (Q1) is connected with a fifth resistor (R5) through a control module, and the other end of the fifth MOS transistor (R4) is connected with the other end of the fifth resistor (R5) through the second resistor (R5) and the other end of the fifth resistor (R5);
the input control module comprises a second MOS tube (Q3), a ninth resistor (R9) and a fourth capacitor (C4);
The fourth resistor (R4) is connected with the drain electrode of the second MOS tube (Q3), the source electrode of the second MOS tube (Q3), one end of the ninth resistor (R9) and one end of the fourth capacitor (C4) are grounded, and the grid electrode of the second MOS tube (Q3), the other end of the ninth resistor (R9), the other end of the fourth capacitor (C4) and the fifth resistor (R5) are connected with the sixth resistor (R6);
the circuit also comprises a bidirectional diode (D5), one end of the bidirectional diode (D5) is connected with a circuit between the sixth resistor (R6) and the fourth capacitor (C4), and the other end of the bidirectional diode (D5) is connected with the fifth resistor (R5);
the overcurrent protection module comprises a third MOS tube (Q4), a fifth capacitor (C5), a tenth resistor (R10), an eleventh resistor (R11), a sixth capacitor (C6) and a second voltage stabilizing tube (D2);
The fifth resistor (R5) is connected with the drain electrode of the third MOS tube (Q4) and one end of a fifth capacitor (C5), the other end of the fifth capacitor (C5) is connected with one end of a tenth resistor (R10), the source electrode of the third MOS tube (Q4) at the other end of the tenth resistor (R10), one end of an eleventh resistor (R11), one end of a sixth capacitor (C6) and the positive electrode of the second voltage stabilizing tube (D2) are grounded, and the other end of the eleventh resistor (R11), the other end of the sixth capacitor (C6), the negative electrode of the second voltage stabilizing tube (D2) and the grid electrode of the third MOS tube (Q4) are connected with the second resistor (R2).
2. The output voltage short-circuit protection circuit structure according to claim 1, wherein the output voltage feedback module comprises a second capacitor (C2), a first voltage stabilizing tube (D1), a seventh resistor (R7) and an eighth resistor (R8);
the drain electrode of the first MOS tube (Q1) is connected with one end of a seventh resistor (R7) and the negative electrode of the first voltage stabilizing tube (D1), one end of an eighth resistor (R8) and the positive electrode of the first voltage stabilizing tube (D1) are grounded, and the other end of the seventh resistor (R7) and the other end of the eighth resistor (R8) are connected with a feedback signal output end (@ DO_back 1).
3. The output voltage short-circuit protection circuit arrangement according to claim 2, characterized in that the output voltage feedback module further comprises a second capacitor (C2), the second capacitor (C2) being connected in parallel with the first voltage regulator tube (D1).
4. The output voltage short-circuit protection circuit arrangement according to claim 3, characterized in that the output voltage feedback module further comprises a third capacitor (C3), wherein the third capacitor (C3) is connected in parallel with the eighth resistor (R8).
5. The output voltage short-circuit protection circuit structure according to claim 1, wherein the power supply filtering module comprises a seventh capacitor (C7) and an eighth capacitor (C8);
The power supply is connected with one end of a seventh capacitor (C7), one end of an eighth capacitor (C8) and the emitter of the triode (Q2), and the other end of the seventh capacitor (C7) and the other end of the eighth capacitor (C8) are grounded.
6. The output voltage short-circuit protection circuit structure according to claim 1, wherein when the current flowing through the first resistor (R1) decreases, the voltage drop of the first resistor (R1) decreases, so that the triode (Q2) is not turned on, at this time, the voltage on the second resistor (R2) decreases, the third MOS transistor (Q4) is not turned on, the switch input signal causes the second MOS transistor (Q3) to be turned on, and the voltage dividing and current limiting effects of the third resistor (R3) and the fourth resistor (R4) cause the first MOS transistor (Q1) to be turned on, so that the voltage signal is normally outputted.
7. The output voltage short-circuit protection circuit structure according to claim 1, wherein when the third MOS transistor (Q4) is turned on, the voltage of the gate electrode input to the second MOS transistor (Q3) is reduced due to the voltage division effect of the fifth resistor (R5), and the second MOS transistor (Q3) is reliably turned off.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295905.2A CN113991601B (en) | 2021-11-03 | 2021-11-03 | Output voltage short circuit protection circuit structure |
| JP2022000682U JP3237720U (en) | 2021-11-03 | 2022-03-07 | Output voltage short circuit protection circuit structure |
| DE202022102786.2U DE202022102786U1 (en) | 2021-11-03 | 2022-05-19 | Output voltage short-circuit protection circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111295905.2A CN113991601B (en) | 2021-11-03 | 2021-11-03 | Output voltage short circuit protection circuit structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113991601A CN113991601A (en) | 2022-01-28 |
| CN113991601B true CN113991601B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111295905.2A Active CN113991601B (en) | 2021-11-03 | 2021-11-03 | Output voltage short circuit protection circuit structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3237720U (en) |
| CN (1) | CN113991601B (en) |
| DE (1) | DE202022102786U1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232171A (en) * | 2007-01-24 | 2008-07-30 | 青岛海信电器股份有限公司 | Television power supply protective circuit |
| CN103500988A (en) * | 2013-09-06 | 2014-01-08 | 深圳大成创安达电子科技发展有限公司 | Alternating current-direct current high voltage protection device of electronic chip and achievement method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803666B (en) * | 2015-11-26 | 2019-04-19 | 比亚迪股份有限公司 | Switching Power Supply control device and Switching Power Supply |
| CN208508514U (en) * | 2018-07-25 | 2019-02-15 | 深圳创维－Rgb电子有限公司 | A kind of short-circuit protection circuit of switching circuit |
| CN113328414B (en) * | 2021-08-02 | 2021-11-12 | 上海芯龙半导体技术股份有限公司南京分公司 | Short-circuit protection circuit |
-
2021
- 2021-11-03 CN CN202111295905.2A patent/CN113991601B/en active Active
-
2022
- 2022-03-07 JP JP2022000682U patent/JP3237720U/en active Active
- 2022-05-19 DE DE202022102786.2U patent/DE202022102786U1/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232171A (en) * | 2007-01-24 | 2008-07-30 | 青岛海信电器股份有限公司 | Television power supply protective circuit |
| CN103500988A (en) * | 2013-09-06 | 2014-01-08 | 深圳大成创安达电子科技发展有限公司 | Alternating current-direct current high voltage protection device of electronic chip and achievement method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3237720U (en) | 2022-06-03 |
| DE202022102786U1 (en) | 2022-05-30 |
| CN113991601A (en) | 2022-01-28 |
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