CN109510958A - Short-circuit protection circuit and short circuit protection system - Google Patents
Short-circuit protection circuit and short circuit protection system Download PDFInfo
- Publication number
- CN109510958A CN109510958A CN201811459977.4A CN201811459977A CN109510958A CN 109510958 A CN109510958 A CN 109510958A CN 201811459977 A CN201811459977 A CN 201811459977A CN 109510958 A CN109510958 A CN 109510958A
- Authority
- CN
- China
- Prior art keywords
- short
- circuit protection
- capacitor
- electrically connected
- switch unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 50
- 239000004065 semiconductor Substances 0.000 claims description 33
- 230000005611 electricity Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 206010037660 Pyrexia Diseases 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention discloses a kind of short-circuit protection circuit and short circuit protection system; including short circuit protection module, voltage output module and TV motherboard; the output voltage of the voltage output module is exported to TV motherboard; the short circuit protection module carries out the voltage output for turning off the voltage output module according to the control signal of the TV motherboard；The short circuit protection module includes short-circuit protection unit and first switch unit; the input terminal of the short-circuit protection unit is electrically connected with the signal output end of the TV motherboard; the output end of the road protection location is electrically connected with the input terminal of the first switch unit, and the output end of the first switch unit is electrically connected with the voltage output module.The present invention is that a kind of short-circuit protection circuit and short circuit protection system can be effectively protected the switching tube of 12V when output end is extremely short-circuit, make the control of its temperature in reasonable specified value, it is excessively high not generate abnormal temperature rise by the way that short circuit protection module is arranged.
Description
Technical field
The present invention relates to television power circuit fields, more particularly to a kind of short-circuit protection circuit and short-circuit protection system
System.
Background technique
Use for current TV set power, when output end abnormal conditions occurs and short circuit occurs, power panel should
Into automatic protection state, each element above can not be abnormal because of the fever of such state, makes hot-spot, causes on fire
Danger.
Each master control IC on the market has the function of short-circuit protection.But it but cannot be very to the switch metal-oxide-semiconductor of output
Good protect, and will cause during output short-circuit, and output switch metal-oxide-semiconductor fever is abnormal, in addition can by melts soldering tin,
It causes local temperature excessively high, phenomenon on fire occurs.
Summary of the invention
The purpose of the present invention is overcoming shortcoming in the prior art, a kind of short-circuit protection circuit and short-circuit protection are provided
System can make when output end exception, the switching tube of effective protection 12V, make the control of switching tube temperature reasonable
It is excessively high not generate abnormal temperature rise for specified value.
The purpose of the present invention is achieved through the following technical solutions:
A kind of short-circuit protection circuit, comprising: short circuit protection module, voltage output module and TV motherboard, the voltage are defeated
The output voltage of module is exported to TV motherboard out, the short circuit protection module according to the control signal of the TV motherboard,
Turn off the voltage output of the voltage output module；
The short circuit protection module includes short-circuit protection unit and first switch unit, the input of the short-circuit protection unit
End is electrically connected with the signal output end of the TV motherboard, the output end of the road protection location and the first switch unit
Input terminal electrical connection, the output end of the first switch unit are electrically connected with the voltage output module.
The short-circuit protection unit includes diode D9 and capacitor C11, the diode D9 in one of the embodiments,
Anode and the TV motherboard signal output end, the cathode of the diode D9 is defeated with the first switch unit respectively
The first end for entering end and the capacitor C11 is electrically connected, the second end ground connection of the capacitor C11.
The short-circuit protection unit further includes resistance R24 and resistance R25, the resistance R25 in one of the embodiments,
First end be electrically connected with the cathode of the diode D9, the second end of the resistance R25 respectively with the resistance R24 first
The input terminal of end and the first switch unit is electrically connected.
The first switch unit includes triode Q3, capacitor C22 and resistance R9 in one of the embodiments, described
The base stage of triode Q3 is electrically connected with the output end of the short-circuit protection unit, and the collector of the triode Q3 is through the electricity
It is electrically connected after resistance R9 with the voltage output module, the emitter ground connection of the triode Q3, the both ends difference of the capacitor C22
It is connect with the emitter of the base stage of the triode Q3 and the triode Q3.
The voltage output module includes second switch unit and output filter unit, institute in one of the embodiments,
The input terminal for stating second switch unit is electrically connected with the output end of the first switch unit, the output of the second switch unit
It holds and is electrically connected with the input terminal of the output filter unit, the output end of the output filter unit is electrically connected with the TV motherboard
It connects.
The second switch unit includes capacitor C14, capacitor C15, resistance R33 and MOS in one of the embodiments,
Pipe Q2, the pole G of the metal-oxide-semiconductor Q2 are electrically connected with the output end of the first switch unit, the pole the S ground connection of the metal-oxide-semiconductor Q2, institute
State output end of the pole D of metal-oxide-semiconductor Q2 as second switch unit, the both ends of the capacitor C14 G with the metal-oxide-semiconductor Q2 respectively
Pole and the pole D of the metal-oxide-semiconductor Q2 electrical connection, the both ends of the capacitor C15 respectively with the pole G of the metal-oxide-semiconductor Q2 and the MOS
The pole S of pipe Q2 is electrically connected, and the both ends of the resistance R33 are extremely electric with the S of the pole G of the metal-oxide-semiconductor Q2 and the metal-oxide-semiconductor Q2 respectively
Connection.
The output filter unit includes capacitor C13, resistance R21 and resistance R22 in one of the embodiments, described
One end of capacitor C13 is electrically connected with the pole D of the metal-oxide-semiconductor Q2, the other end ground connection of the capacitor C13, and the two of the resistance R21
It holds and is connected in parallel with the both ends of the capacitor C13, the both ends of the resistance R22 and the both ends of the capacitor C13 are connected in parallel.
The voltage of the voltage output module output is 12V in one of the embodiments,.
The capacitor C11 is electrolytic capacitor in one of the embodiments,.
The present invention also provides a kind of short circuit protection systems, including above-described short-circuit protection circuit.
The present invention compared with the prior art the advantages of and have the beneficial effect that:
The present invention is that a kind of short-circuit protection circuit and short circuit protection system can be defeated by the way that short circuit protection module is arranged
When outlet is extremely short-circuit, it can be effectively protected the switching tube of 12V, make the control of its temperature in reasonable specified value, do not generate different
Normal temperature rise is excessively high.And it is possible to occur that switching tube temperature is excessively high to ask when avoiding because there is short circuit or excessive electric current
Topic, so protection circuit plate and avoid generate fire.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the circuit diagram of short-circuit protection circuit and short circuit protection system of the invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
Referring to Fig. 1, a kind of short-circuit protection circuit, comprising: short circuit protection module, voltage output module and TV motherboard,
The output voltage of the voltage output module is exported to TV motherboard, and the short circuit protection module is according to the TV motherboard
Signal is controlled, the voltage output for turning off the voltage output module is carried out；The short circuit protection module includes short-circuit protection unit
And first switch unit, the input terminal of the short-circuit protection unit is electrically connected with the signal output end of the TV motherboard, described
The output end of road protection location is electrically connected with the input terminal of the first switch unit, the output end of the first switch unit with
The voltage output module electrical connection.The voltage of the voltage output module output is 12V.
It should be noted that the short-circuit protection unit includes diode D9 and capacitor C11, the sun of the diode D9
The signal output end of pole and the TV motherboard, the cathode of the diode D9 input terminal with the first switch unit respectively
It is electrically connected with the first end of the capacitor C11, the second end ground connection of the capacitor C11.Preferably, the capacitor C11 is electrolysis
Capacitor.
It should be noted that the short-circuit protection unit further includes the of resistance R24 and resistance R25, the resistance R25
One end is electrically connected with the cathode of the diode D9, the second end of the resistance R25 respectively with the first end of the resistance R24 and
The input terminal of the first switch unit is electrically connected.
It should be noted that the first switch unit includes triode Q3, capacitor C22 and resistance R9, the triode
The base stage of Q3 is electrically connected with the output end of the short-circuit protection unit, the collector of the triode Q3 after the resistance R9 with
Voltage output module electrical connection, the emitter ground connection of the triode Q3, the both ends of the capacitor C22 are respectively with described three
The base stage of pole pipe Q3 is connected with the emitter of the triode Q3.
It should be noted that the voltage output module include second switch unit and output filter unit, described second
The input terminal of switch unit is electrically connected with the output end of the first switch unit, the output end of the second switch unit and institute
The input terminal electrical connection of output filter unit is stated, the output end of the output filter unit is electrically connected with the TV motherboard.
It should be noted that the second switch unit includes capacitor C14, capacitor C15, resistance R33 and metal-oxide-semiconductor Q2, institute
The pole G for stating metal-oxide-semiconductor Q2 is electrically connected with the output end of the first switch unit, the pole the S ground connection of the metal-oxide-semiconductor Q2, the metal-oxide-semiconductor
Output end of the pole D of Q2 as second switch unit, the both ends of the capacitor C14 respectively with the pole G of the metal-oxide-semiconductor Q2 and described
The pole D of metal-oxide-semiconductor Q2 is electrically connected, the both ends of the capacitor C15 S with the pole G of the metal-oxide-semiconductor Q2 and the MOS pipe Q2 respectively
Pole electrical connection, the both ends of the resistance R33 are electrically connected with the pole S of the pole G of the metal-oxide-semiconductor Q2 and the metal-oxide-semiconductor Q2 respectively.
It should be noted that the output filter unit includes capacitor C13, resistance R21 and resistance R22, the capacitor C13
One end be electrically connected with the pole D of the metal-oxide-semiconductor Q2, the other end of capacitor C13 ground connection, the both ends of the resistance R21 and institute
The both ends for stating capacitor C13 are connected in parallel, and the both ends of the resistance R22 and the both ends of the capacitor C13 are connected in parallel.
When work, when 12V output end is short-circuited, 3.3V powers off CPU on TV SKD, is provided by CPU without output
PWON signal cut, at this time due to fully charged on electrolytic capacitor C11, so triode Q3 is unanimously connected, metal-oxide-semiconductor Q2 also can one
Straight in the conductive state, until the voltage on electrolytic capacitor is lower than the Vbe junction voltage of triode, triode can just end.
Traditional design scheme does not have diode D9, electrolytic capacitor C11 circuit, the primary PWM control when output short-circuit
IC U1 shutdown, then opens at once again, repeatedly, will lead to metal-oxide-semiconductor Q2 and also frequently switch on, due to short-circuit condition at this time, electricity
Stream is very big, so will lead to the raising of Q2 temperaturing lifting abnormality, or even can melt scolding tin, generate danger on fire.And the application can be kept away
Exempt from problems occur.
There is this partial circuit, so that it may which the on-off times for reducing Q2 effectively reduce his temperature.Ensure his temperature
It is in a reasonable specified value.
When the present invention solves output short-circuit, the element on protection power source plate will not be damaged, and will not generate part
The abnormal of temperature increase.After short-circuit abnormal releasing, circuit be can work normally.
The present invention also provides a kind of short circuit protection systems, including above-described short-circuit protection circuit.
The present invention compared with the prior art the advantages of and have the beneficial effect that:
The present invention is that a kind of short-circuit protection circuit and short circuit protection system can be defeated by the way that short circuit protection module is arranged
When outlet is extremely short-circuit, it can be effectively protected the switching tube of 12V, make the control of its temperature in reasonable specified value, do not generate different
Normal temperature rise is excessively high.And it is possible to occur that switching tube temperature is excessively high to ask when avoiding because there is short circuit or excessive electric current
Topic, so protection circuit plate and avoid generate fire.
Only several embodiments of the present invention are expressed for embodiment described above, and the description thereof is more specific and detailed, but
It cannot be construed as a limitation to the scope of the present invention.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to of the invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of short-circuit protection circuit characterized by comprising short circuit protection module, voltage output module and TV motherboard, institute
The output voltage for stating voltage output module is exported to TV motherboard, and the short circuit protection module is according to the control of the TV motherboard
Signal processed carries out the voltage output for turning off the voltage output module；
The short circuit protection module includes short-circuit protection unit and first switch unit, the input terminal of the short-circuit protection unit with
The signal output end of the TV motherboard is electrically connected, the input of the output end of the road protection location and the first switch unit
End electrical connection, the output end of the first switch unit are electrically connected with the voltage output module.
2. short-circuit protection circuit according to claim 1, which is characterized in that the short-circuit protection unit includes diode D9
With capacitor C11, the anode of the diode D9 and the signal output end of the TV motherboard, the cathode difference of the diode D9
It is electrically connected with the first end of the input terminal of the first switch unit and the capacitor C11, the second termination of the capacitor C11
Ground.
3. short-circuit protection circuit according to claim 1, which is characterized in that the short-circuit protection unit further includes resistance
R24 and resistance R25, the first end of the resistance R25 are electrically connected with the cathode of the diode D9, and the second of the resistance R25
End is electrically connected with the input terminal of the first end of the resistance R24 and the first switch unit respectively.
4. short-circuit protection circuit according to claim 1, which is characterized in that the first switch unit includes triode
Q3, capacitor C22 and resistance R9, the base stage of the triode Q3 are electrically connected with the output end of the short-circuit protection unit, and described three
The collector of pole pipe Q3 is electrically connected after the resistance R9 with the voltage output module, and the emitter of the triode Q3 connects
Ground, the both ends of the capacitor C22 are connect with the emitter of the base stage of the triode Q3 and the triode Q3 respectively.
5. short-circuit protection circuit according to claim 1, which is characterized in that the voltage output module includes second switch
Unit and output filter unit, the input terminal of the second switch unit are electrically connected with the output end of the first switch unit,
The output end of the second switch unit is electrically connected with the input terminal of the output filter unit, described to export the defeated of filter unit
Outlet is electrically connected with the TV motherboard.
6. short-circuit protection circuit according to claim 1, which is characterized in that the second switch unit include capacitor C14,
Capacitor C15, resistance R33 and metal-oxide-semiconductor Q2, the pole G of the metal-oxide-semiconductor Q2 are electrically connected with the output end of the first switch unit, institute
State the pole the S ground connection of metal-oxide-semiconductor Q2, output end of the pole D of the metal-oxide-semiconductor Q2 as second switch unit, the both ends of the capacitor C14
Be electrically connected respectively with the pole D of the pole G of the metal-oxide-semiconductor Q2 and the metal-oxide-semiconductor Q2, the both ends of the capacitor C15 respectively with the MOS
The pole G of pipe Q2 and the pole S of the metal-oxide-semiconductor Q2 electrical connection, the both ends of the resistance R33 respectively with the pole G of the metal-oxide-semiconductor Q2 and institute
State the pole the S electrical connection of metal-oxide-semiconductor Q2.
7. short-circuit protection circuit according to claim 6, which is characterized in that the output filter unit include capacitor C13,
Resistance R21 and resistance R22, one end of the capacitor C13 are electrically connected with the pole D of the metal-oxide-semiconductor Q2, and the capacitor C13's is another
End ground connection, the both ends of the resistance R21 and the both ends of the capacitor C13 are connected in parallel, the both ends of the resistance R22 and the electricity
The both ends for holding C13 are connected in parallel.
8. short-circuit protection circuit according to claim 1, which is characterized in that the voltage of voltage output module output is
12V。
9. short-circuit protection circuit according to claim 2, which is characterized in that the capacitor C11 is electrolytic capacitor.
10. a kind of short circuit protection system, which is characterized in that including the electricity of short-circuit protection described in any one of claim 1~9
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459977.4A CN109510958A (en) | 2018-11-30 | 2018-11-30 | Short-circuit protection circuit and short circuit protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459977.4A CN109510958A (en) | 2018-11-30 | 2018-11-30 | Short-circuit protection circuit and short circuit protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109510958A true CN109510958A (en) | 2019-03-22 |
Family
ID=65750002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811459977.4A Pending CN109510958A (en) | 2018-11-30 | 2018-11-30 | Short-circuit protection circuit and short circuit protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109510958A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917100A (en) * | 2020-07-08 | 2020-11-10 | 北京卫星制造厂有限公司 | Low-power-consumption output short-circuit protection circuit based on primary current sampling |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05284743A (en) * | 1992-03-31 | 1993-10-29 | Sony Corp | Switching power source protective circuit |
| JP2009247072A (en) * | 2008-03-29 | 2009-10-22 | Shindengen Electric Mfg Co Ltd | Abnormality detection protection circuit, method, and program |
| CN203301611U (en) * | 2013-06-06 | 2013-11-20 | 深圳Tcl新技术有限公司 | Direct-current switching circuit and switching power source |
| CN104617558A (en) * | 2013-11-01 | 2015-05-13 | 欧姆龙株式会社 | Power supply short circuit protection circuit |
| CN205545180U (en) * | 2016-03-31 | 2016-08-31 | 康佳集团股份有限公司 | Short -circuit protection circuit and power supply device |
| CN108155626A (en) * | 2018-01-02 | 2018-06-12 | 京东方科技集团股份有限公司 | A kind of booster circuit, its control method, display panel and display device |
| CN108599123A (en) * | 2018-01-18 | 2018-09-28 | 深圳创维－Rgb电子有限公司 | The short-circuit protection circuit and television set of power switch |
| CN209488696U (en) * | 2018-11-30 | 2019-10-11 | 惠州三华工业有限公司 | Short-circuit protection circuit and short circuit protection system |
-
2018
- 2018-11-30 CN CN201811459977.4A patent/CN109510958A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05284743A (en) * | 1992-03-31 | 1993-10-29 | Sony Corp | Switching power source protective circuit |
| JP2009247072A (en) * | 2008-03-29 | 2009-10-22 | Shindengen Electric Mfg Co Ltd | Abnormality detection protection circuit, method, and program |
| CN203301611U (en) * | 2013-06-06 | 2013-11-20 | 深圳Tcl新技术有限公司 | Direct-current switching circuit and switching power source |
| CN104617558A (en) * | 2013-11-01 | 2015-05-13 | 欧姆龙株式会社 | Power supply short circuit protection circuit |
| CN205545180U (en) * | 2016-03-31 | 2016-08-31 | 康佳集团股份有限公司 | Short -circuit protection circuit and power supply device |
| CN108155626A (en) * | 2018-01-02 | 2018-06-12 | 京东方科技集团股份有限公司 | A kind of booster circuit, its control method, display panel and display device |
| CN108599123A (en) * | 2018-01-18 | 2018-09-28 | 深圳创维－Rgb电子有限公司 | The short-circuit protection circuit and television set of power switch |
| CN209488696U (en) * | 2018-11-30 | 2019-10-11 | 惠州三华工业有限公司 | Short-circuit protection circuit and short circuit protection system |
Non-Patent Citations (1)
| Title |
|---|
| 于永春;: "CRT彩电开关电源常见保护电路维修技巧(上)", 家电检修技术, no. 09 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917100A (en) * | 2020-07-08 | 2020-11-10 | 北京卫星制造厂有限公司 | Low-power-consumption output short-circuit protection circuit based on primary current sampling |
| CN111917100B (en) * | 2020-07-08 | 2022-04-12 | 北京卫星制造厂有限公司 | Low-power-consumption output short-circuit protection circuit based on primary current sampling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103177698B (en) | A kind of LED backlight drive circuit and backlight module | |
| CN109510450B (en) | Reverse connection protection method and photovoltaic power generation system | |
| CN101815378A (en) | LED constant current source output short circuit protection circuit | |
| CN106253210A (en) | Undervoltage protection circuit | |
| CN209488696U (en) | Short-circuit protection circuit and short circuit protection system | |
| CN109510958A (en) | Short-circuit protection circuit and short circuit protection system | |
| CN109613968A (en) | Power supply redundant output circuit with short-circuit protection | |
| CN105857215A (en) | Reverse-connection-preventing and power-off post-processing circuit for vehicle-mounted control unit power supply | |
| CN108173035A (en) | Plug and socket | |
| CN104682371A (en) | Large current direct current anti-reverse polarity circuit using MOS (metal oxide semiconductor) tubes | |
| CN205304240U (en) | Control circuit is prevented joining conversely by high -power direct current | |
| CN208369280U (en) | A kind of lithium battery protection circuit | |
| CN204858537U (en) | Battery discharge short -circuit protection circuit | |
| CN106711989A (en) | Anti-reverse connection circuit for input of direct-current power supply | |
| CN209282830U (en) | Surge current suppression circuit | |
| CN209217706U (en) | Surge current suppression circuit | |
| CN108644144A (en) | A kind of DC fan failure monitoring system | |
| CN211350526U (en) | Low-voltage wiring device for circuit breaker | |
| CN205141638U (en) | Switching power supply output short circuit disconnection protection circuit | |
| CN209497259U (en) | Battery protecting circuit | |
| CN209592973U (en) | PMOS tube protects circuit | |
| CN109842090B (en) | Output short-circuit protection circuit and protection method | |
| CN208656499U (en) | A kind of uninterrupted DC power supply | |
| CN207269161U (en) | A kind of light control console uninterruptible power system | |
| CN205811655U (en) | A kind of two dc power supply is powered allocation unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190822 Address after: 516006 14 Districts of Zhongkai High-tech Development Zone, Huizhou City, Guangdong Province Applicant after: Huizhou Sanhua Industrial Ltd. Address before: 516006 Guangdong province Huizhou City Zhongkai high tech Development Zone Applicant before: Huizhou Huake Electrical Appliance Co. Ltd. |
|
| TA01 | Transfer of patent application right |