CN207118029U - The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED - Google Patents
The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED Download PDFInfo
- Publication number
- CN207118029U CN207118029U CN201720854413.5U CN201720854413U CN207118029U CN 207118029 U CN207118029 U CN 207118029U CN 201720854413 U CN201720854413 U CN 201720854413U CN 207118029 U CN207118029 U CN 207118029U
- Authority
- CN
- China
- Prior art keywords
- circuit system
- driving
- triode
- driving chips
- zener diode
- 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.)
- Expired - Fee Related
Links
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 13
- 230000006870 function Effects 0.000 description 14
- 230000007423 decrease Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 210000005069 ears Anatomy 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses the circuit system that input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED, including the first Zener diode for being connected in parallel of IC driving chips, the bidirectional trigger diode for being connected to AC220V, bidirectional trigger diode one end and the second Zener diode, the triode that is connected in series with the second Zener diode；First power supply leg of IC driving chips is formed with the first Zener diode and triode to be connected in parallel, and the second power supply leg of IC driving chips and the other end of bidirectional trigger diode connect the loop to form whole circuit system, triode also grounding connection.The circuit system is by the settings of the electronic components such as bidirectional trigger diode, two Zener diodes and triode etc. and uses corresponding connected mode; it be able to can be protected when too high or too low in the supply voltage of IC driving chips; make the relatively reliable work of IC driving chips; voltage protection function can not only be realized, also very useful simple and cost is cheap.
Description
Technical field
A kind of LED circuit system is the utility model is related to, more particularly to input is realized in a kind of non-isolated driving of common LED
The circuit system of high-low voltage defencive function.
Background technology
At present, the non-isolated constant-current drive circuits of widely used LED all do not have the scope to input voltage on the market
Control defencive function is set, in actual applications, when the supply voltage of power network is unstable or fluctuating range is larger, easily makes drive
Dynamic device failure, causes damage of product.Such as：When the supply voltage of driving exceeds 265V, because driving chip does not have overvoltage
Limitation function, drive still in working condition, too high input voltage, driving chip is all worked with peripheral electron element in itself
In overload state, this can cause the power consumption of electronic component to increase, and temperature rises, and electronic component burning is resulted in the short time
Ruin, make damage of product.When driving voltage supplied to be less than 165V, the typically no low voltage test of crossing of the non-isolated driving chips of LED is protected
Protective function, driving are still in working condition, and now because the increase of input current, the ripple current of circuit raise, this can lead
The power consumption for sending a telegraph commutation diode in road, filter capacitor and driving chip increases, beyond the specified normal work of component in itself
Parameter.So as to cause element to be damaged, finally make damage of product.
The content of the invention
A kind of the shortcomings that the purpose of this utility model is to overcome above-mentioned prior art, there is provided non-isolated drive of common LED
Input high-low voltage protection is realized in the dynamic circuit system for realizing input high-low voltage defencive function, the non-isolated driving of the common LED
The circuit system of function is set by the electronic components such as bidirectional trigger diode, two Zener diodes and triode etc.
Put and use corresponding connected mode, be able to can be protected when too high or too low in the supply voltage of IC driving chips,
Make the relatively reliable work of IC driving chips, voltage protection function can not only be realized, also very useful simple and cost is cheap.
Technical scheme is used by the utility model solves its technical problem：A kind of non-isolated driving of common LED is realized
Input the circuit system of high-low voltage defencive function, including IC driving chips, the bidirectional trigger diode, two-way for being connected to AC220V
The first Zener diode and the second Zener diode that diac one end is connected in parallel, company of being connected with the second Zener diode
The triode connect；First power supply leg of IC driving chips is formed with the first Zener diode and triode to be connected in parallel, and IC drives
Second power supply leg of dynamic chip and the other end of bidirectional trigger diode connect the loop to form whole circuit system, triode
Also grounding connection.
Further, described IC driving chips are connected with least three LEDs being connected in series.
The non-isolated driving of the common LED realizes that the operation principle of the circuit system of input high-low voltage defencive function is：
（1）When exchanging input rated voltage decline, VCC+ voltages decline, the electricity on the first Zener diode negative pole
When pressing and also decline therewith, and being less than the breakdown reverse voltage of the first Zener diode, the cut-off of the first Zener diode, IC drivings
The first power supply leg at chip power supply end cannot get supply current, and IC driving chips are stopped, and circuit system is without output, IC
Driving chip enters under-voltage protection state；When exchange input supply voltage rising, the first Zener when VCC+ is higher than 150V
Diode recovery turns on, and IC driving chips supply current recovers normal, and circuit system is started working；
（2）When exchange input rated voltage rise when, beyond circuit system work safety limit 265V when, VCC
+ voltage rises, when the voltage on the second Zener diode exceeds the breakdown reverse voltage of the second Zener diode, the second Zener
Diode current flow, triode also turn on therewith, the supply current on the first power supply leg of IC driving chip feeder ears, pass through
Triode is grounded, and IC driving chips are stopped, and circuit system enters overvoltage protection state, when input voltage drops to just
During constant value, the cut-off of the second Zener diode, triode cut-off, the VCC of the first power supply leg of IC driving chip feeder ears
Service restoration, IC driving chips are started working, and circuit system recovers normal.
In summary, the circuit of input high-low voltage defencive function is realized in the non-isolated driving of common LED of the present utility model
System is by the settings of the electronic components such as bidirectional trigger diode, two Zener diodes and triode etc. and uses phase
The connected mode answered, it can be protected when too high or too low in the supply voltage of IC driving chips, IC is driven core
The relatively reliable work of piece, can not only realize voltage protection function, and also very useful simple and cost is cheap.
Brief description of the drawings
Fig. 1 is that input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED of the utility model embodiment 1
Circuit system structure connection block diagram.
Embodiment
Embodiment 1
The circuit of input high-low voltage defencive function is realized in the non-isolated driving of a kind of common LED described by the present embodiment 1
System, as shown in figure 1, including IC driving chips 1, the bidirectional trigger diode 2 for being connected to AC220V, bidirectional trigger diode one end
The first Zener diode 3 and the second Zener diode 4 that are connected in parallel, the triode 5 being connected in series with the second Zener diode；
First power supply leg 6 and the first Zener diode of IC driving chips and triode formation are connected in parallel, and the of IC driving chips
Two power supply legs 7 are connected the loop to form whole circuit system, the triode also company of ground connection with the other end of bidirectional trigger diode
Connect.
The IC driving chips are connected with three LEDs being connected in series 8.
The non-isolated driving of the common LED realizes that the operation principle of the circuit system of input high-low voltage defencive function is：
（1）When exchanging input rated voltage decline, VCC+ voltages decline, the electricity on the first Zener diode negative pole
When pressing and also decline therewith, and being less than the breakdown reverse voltage of the first Zener diode, the cut-off of the first Zener diode, IC drivings
The first power supply leg at chip power supply end cannot get supply current, and IC driving chips are stopped, and circuit system is without output, IC
Driving chip enters under-voltage protection state；When exchange input supply voltage rising, the first Zener when VCC+ is higher than 150V
Diode recovery turns on, and IC driving chips supply current recovers normal, and circuit system is started working；
（2）When exchange input rated voltage rise when, beyond circuit system work safety limit 265V when, VCC
+ voltage rises, when the voltage on the second Zener diode exceeds the breakdown reverse voltage of the second Zener diode, the second Zener
Diode current flow, triode also turn on therewith, the supply current on the first power supply leg of IC driving chip feeder ears, pass through
Triode is grounded, and IC driving chips are stopped, and circuit system enters overvoltage protection state, when input voltage drops to just
During constant value, the cut-off of the second Zener diode, triode cut-off, the VCC of the first power supply leg of IC driving chip feeder ears
Service restoration, IC driving chips are started working, and circuit system recovers normal.
It is described above, only it is preferred embodiment of the present utility model, not structure of the present utility model is made any
Formal limitation.Every any simple modification made according to the technical essence of the utility model to above example, it is equal
Change and modification, in the range of still falling within the technical solution of the utility model.
Claims (2)
1. the circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED, it is characterised in that including
The first Zener two that IC driving chips, the bidirectional trigger diode for being connected to AC220V, bidirectional trigger diode one end are connected in parallel
The triode that pole pipe and the second Zener diode and the second Zener diode are connected in series；First power supply branch of IC driving chips
Pin is formed with the first Zener diode and triode and is connected in parallel, the second power supply leg of IC driving chips and the two-way pole of triggering two
The other end of pipe connects the loop to form whole circuit system, triode also grounding connection.
2. the circuit of input high-low voltage defencive function is realized in the non-isolated driving of a kind of common LED according to claim 1
System, it is characterised in that described IC driving chips are connected with least three LEDs being connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720854413.5U CN207118029U (en) | 2017-07-14 | 2017-07-14 | The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720854413.5U CN207118029U (en) | 2017-07-14 | 2017-07-14 | The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207118029U true CN207118029U (en) | 2018-03-16 |
Family
ID=61573178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720854413.5U Expired - Fee Related CN207118029U (en) | 2017-07-14 | 2017-07-14 | The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207118029U (en) |
-
2017
- 2017-07-14 CN CN201720854413.5U patent/CN207118029U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203180783U (en) | Boosted circuit | |
| CN106972769A (en) | A kind of light current electrical load overvoltage crowbar | |
| CN203632566U (en) | Secondary feedback effective integrated multi-protection constant-voltage control circuit for LED driving | |
| CN203608412U (en) | An LED lamp driving power supply employing optical coupler feedback control | |
| CN103152928A (en) | Load overvoltage protection circuit and control method thereof | |
| CN201256467Y (en) | Novel LED AC driver circuit | |
| CN203368840U (en) | LED driving circuit and LED display device | |
| CN207118029U (en) | The circuit system of input high-low voltage defencive function is realized in a kind of non-isolated driving of common LED | |
| CN204598412U (en) | A kind of LED drive power soft starting circuit | |
| CN201037608Y (en) | LED energy-saving lamp device | |
| CN203722230U (en) | Simple protective circuit against reversal connection of power supply | |
| CN203813419U (en) | Over-current protection circuit of switch power supply | |
| CN203368019U (en) | Overvoltage protection circuit for AC directly driven LED circuit | |
| CN106604472B (en) | LED drive circuit | |
| CN201937238U (en) | Input undervoltage protection circuit | |
| CN213991098U (en) | LED drive circuit with protection function | |
| CN204014184U (en) | A kind of drive circuit of LED traffic lights | |
| CN201403223Y (en) | Constant current diode drive device | |
| CN202997964U (en) | Double-end flyback type switch power supply with input overcurrent and power-down protection | |
| CN203932956U (en) | A kind of high-current relay Drive Protecting Circuit | |
| CN202602243U (en) | LED (Light-Emitting Diode) illumination power supply protection circuit | |
| CN202190435U (en) | Novel LED street lamp driving power supply | |
| CN204741590U (en) | LED drive circuit | |
| CN203720699U (en) | Series type current expanding/current limiting protection circuit for three-terminal voltage stabilizing chip | |
| CN103560490A (en) | Protection circuit of boost constant current power supply output short circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180724 Address after: 529000 4, 1 (1), 1 Nanshan Road, Jianghai District, Jiangmen, Guangdong. Patentee after: GUANGDONG YANYANG LIGHTING CO.,LTD. Address before: 529000 1 1 Wuyi Road, Jianghai District, Jiangmen, Guangdong (self compiled A02) Patentee before: JIANGMEN CRDLIGHT OPTOELECTRONICS TECHNOLOGY CO.,LTD. |
|
| 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: 20180316 |