CN204697354U - Antisurge LED power circuit - Google Patents
Antisurge LED power circuit Download PDFInfo
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- CN204697354U CN204697354U CN201520432484.7U CN201520432484U CN204697354U CN 204697354 U CN204697354 U CN 204697354U CN 201520432484 U CN201520432484 U CN 201520432484U CN 204697354 U CN204697354 U CN 204697354U
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Abstract
The utility model discloses a kind of antisurge LED power circuit, comprise bridge heap rectification module, constant flow module, LED load, surge protection module, surge protection module comprises fuse F1, thermistor NTC, piezo-resistance UR, fuse F1 and thermistor NTC connects, bridge heap rectification module has two inputs, an one input connects civil power zero line, another input is connected civil power live wire by fuse F1 with thermistor NTC, and fuse F1 connecting bridge heap rectification module, thermistor NTC connects civil power live wire; Piezo-resistance UR one end connects civil power zero line, and the other end is connected between fuse F1 and thermistor NTC.Before the utility model bridge heap rectification module in a power, surge protection module is set to absorb peak voltage, protects whole power circuit and LED load, there is the advantage that structure is simple, cost is low.
Description
Technical field
The utility model relates to LED drive circuit field, particularly, relates to a kind of antisurge LED power circuit.
Background technology
LED light source, as a kind of novel green light source, because it has the advantages such as power consumption is low, the life-span is long, reaction speed is fast, energy-efficient, is applied more and more widely.
Under same brightness, LED light source power consumption is only 1/10th of ordinary incandescent lamp, and the life-span can extend 100 times.But its life-span is decided by driving power to a great extent, therefore a kind of reliably, conversion efficiency high, LED driving power that the life-span is long is most important for LED light source.
At present, supply power mode many employings direct current supply of LED, the civil power of power supply needs to be converted to direct current by rectifier bridge, more luminous by drive circuit driving LED lamp pearl.In the moment of circuit start or when suffering effects of lightning, can peak voltage be produced in circuit, whole power circuit and LED load are caused damage.
Utility model content
The purpose of this utility model is just to provide a kind of antisurge LED power circuit, and this LED power circuit arranges surge protection module to absorb peak voltage at ac input end, protects whole power circuit and LED load.
Antisurge LED power circuit, comprises bridge heap rectification module, constant flow module and LED load; Described constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; The output of described LED load positive pole connecting bridge heap rectification module, negative pole connects the D pole of metal-oxide-semiconductor Q1; The power input of current constant control chip IC 1 is connected to the output of bridge heap rectification module by divider resistance R5; The sampling end of current constant control chip IC 1 is connected respectively to D pole and the S pole of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8, the S pole of metal-oxide-semiconductor Q1 is also connected to the output of current constant control chip IC 1 by regulating resistance R6 ground connection, G pole; Also comprise surge protection module, described surge protection module comprises fuse F1, thermistor NTC, piezo-resistance UR, fuse F1 and thermistor NTC connects, described bridge heap rectification module has two inputs, an one input connects civil power zero line, another input is connected civil power live wire by fuse F1 with thermistor NTC, and fuse F1 connecting bridge heap rectification module, thermistor NTC connects civil power live wire; Piezo-resistance UR one end connects civil power zero line, and the other end is connected between fuse F1 and thermistor NTC.
Further, described bridge heap rectification module comprises full-bridge rectification bridge heap BD1 and filter capacitor C3, and two inputs of full-bridge rectification bridge heap BD1 connect civil power zero line and fuse F1 respectively; The direct current output cathode of full-bridge rectification bridge heap BD1 is connected with the positive pole of LED load with divider resistance R5, the direct current output negative pole ground connection of full-bridge rectification bridge heap BD1; Filter capacitor C3 is connected in parallel between full-bridge rectification bridge heap BD1 direct current output negative pole and direct current output cathode.
As further improvement of the utility model, above-mentioned antisurge LED power circuit also comprises fills out paddy circuit, this is filled out paddy circuit and comprises electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, electric capacity C4 one end connects the direct current output cathode of full-bridge rectification bridge heap BD1, the negative pole of other end connection diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, and the negative pole of diode D2 connects the direct current output cathode of full-bridge rectification bridge heap BD1; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
Further, above-mentioned antisurge LED power circuit also comprises for isolating the diode D1 filling out paddy circuit and bridge heap rectification module, and output, the negative pole of diode D1 positive pole connecting bridge heap rectification module connect electric capacity C4, the negative pole of diode D2, divider resistance R5, LED load positive pole simultaneously.
Preferably, the capacitance of described electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, and the negative pole of electric capacity C4 connects the negative pole of diode D4, the minus earth of electric capacity C5.
Further, described LED load two ends are also parallel with filter capacitor C2.
Preferably, the resistance of described regulating resistance R6 is 5 Ω.
To sum up, the beneficial effects of the utility model are:
1, the utility model arranges peak voltage when surge protection module starts with absorbing circuit or affects by thunderbolt before bridge heap rectification module, protects whole power circuit and LED load;
2, the utility model is set up and is filled out paddy circuit to increase considerably the angle of flow of rectifier diode after bridge heap rectification module, by filling and leading up valley point, making input current become the waveform close to sine wave from spike, significantly reducing total harmonic distortion.
3, the utility model structure is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
[embodiment 1]
As shown in Figure 1, the antisurge LED power circuit of the present embodiment, comprise bridge heap rectification module, be connected to bridge heap rectification module on constant flow module, LED load, surge protection module; Wherein: bridge heap rectification module comprises full-bridge rectification bridge heap BD1 and filter capacitor C3, full-bridge rectification bridge heap BD1 is connected and the rectifier bridge stack be packaged as a whole by the form of full-wave bridge rectifier circuit by 4 rectifier diodes, it has two inputs and two outputs, and two outputs are respectively direct current output cathode, direct current output negative pole.The direct current output cathode of full-bridge rectification bridge heap BD1 is the output of bridge heap rectification module, and the direct current output cathode of full-bridge rectification bridge heap BD1 connects the positive pole of constant flow module, LED load, direct current output negative pole ground connection.Filter capacitor C3 is connected in parallel between full-bridge rectification bridge heap BD1 direct current output negative pole and direct current output cathode, and namely filter capacitor C3 one end connects the direct current output cathode of full-bridge rectification bridge heap BD1, other end ground connection.
Described surge protection module comprises fuse F1, thermistor NTC, piezo-resistance UR, fuse F1 and thermistor NTC connects, an input of full-bridge rectification bridge heap BD1 connects civil power zero line N, another input is connected civil power live wire L by fuse F1 with thermistor NTC, and fuse F1 connects full-bridge rectification bridge heap BD1, thermistor NTC connection civil power live wire L; Piezo-resistance UR one end connects civil power zero line N, and the other end is connected between fuse F1 and thermistor NTC.
Constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; Above-mentioned LED load positive pole connects the direct current output cathode of full-bridge rectification bridge heap BD1, and negative pole connects the D pole (drain electrode) of metal-oxide-semiconductor Q1; Current constant control chip IC 1 has power input VH, sampling end CS, earth terminal GND, output GATE, power output end VDD, its earth terminal GND ground connection, power input VH is connected to the direct current output cathode of full-bridge rectification bridge heap BD1 by divider resistance R5, obtains operating voltage; Parallel filtering electric capacity C1 on power output end VDD and earth terminal GND, the operating voltage of level and smooth current constant control chip IC 1, makes current constant control chip IC 1 keep steady operation; Sampling end CS is connected respectively to D pole and S pole (source electrode) of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8; The output GATE of current constant control chip IC 1 connects the G pole (grid) of metal-oxide-semiconductor Q1, controls conducting and the cut-off of metal-oxide-semiconductor, and the S pole of metal-oxide-semiconductor Q1 is also by regulating resistance R6 ground connection.
In the present embodiment, in order to avoid the surge current that circuit produces in the moment of opening or when affecting by thunderbolt, be connected in series a power type thermal resistance NTC in a power, effectively can suppress surge current when opening, and the resistance value of thermistor NTC will drop to very little degree after completing surge current suppression effect, its power consumed is negligible, can not impact normal operating current.Piezo-resistance UR is connected in parallel in AC circuit and mainly plays " deboost superelevation " effect.
The surge protection module that fuse F1, thermistor NTC, piezo-resistance UR are formed can absorb peak voltage, protects whole power circuit and LED load.
Above-mentioned LED load is preferably the LED string that the series connection of multiple LED lamp bead is formed, also can be single led lamp pearl, sampling resistor R7, sampling resistor R8 gather the electric current on LED load loop, current constant control chip IC 1 is according to the conducting state of the Current Control metal-oxide-semiconductor gathered, thus control loop voltage, the ratio reaching loop voltage and resistance is invariable, realizes current constant.
Embodiment 2:
On the basis of embodiment 1, in the present embodiment, antisurge LED power circuit also comprises fills out paddy circuit.Described paddy circuit of filling out comprises electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, the output of electric capacity C4 one end connecting bridge heap rectification module and full-bridge rectification bridge pile the direct current output cathode of BD1, the negative pole of other end connection diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, the output of the negative pole connecting bridge heap rectification module of diode D2 and the direct current output cathode of full-bridge rectification bridge heap BD1; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
In the present embodiment, set up and fill out paddy circuit and fill and lead up circuit, increase considerably the angle of flow of rectifier diode in full-bridge rectification bridge heap BD1, by filling and leading up valley point, making input current become the waveform close to sine wave from spike, significantly reducing total harmonic distortion.Power factor can be brought up to about 0.9 by the utility model.Circuit of the present utility model is simple, cost is low, power factor compensation Be very effective, and in input circuit, do not need the large inductor using the large heavy of volume.
[embodiment 3]
On the basis of embodiment 2, the compact LED drive circuit in the present embodiment also comprises for isolating the diode D1 filling out paddy circuit and bridge heap rectification module.
Diode D1 positive pole connects the direct current output cathode of full-bridge rectification bridge heap BD1, and negative pole connects the positive pole of electric capacity C4, the negative pole of diode D2, divider resistance R5, LED load simultaneously.D1 is isolating diode, full-bridge rectification bridge can be piled BD1 and fill out paddy circuit to separate.
In the present embodiment, the capacitance of electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, the negative pole that positive pole connects the direct current output cathode of full-bridge rectification bridge heap BD1, negative pole connects diode D4 of electric capacity C4, positive pole, the minus earth of the cathode connecting diode D2 of electric capacity C5.
Above-mentioned LED load two ends are also parallel with filter capacitor C2, make the stabilized input voltage of LED load.
In the present embodiment, current constant control chip IC 1 adopts ORG8510 constant current chip, and metal-oxide-semiconductor Q1 is N-channel MOS pipe.
Above-mentioned filter capacitor C1 adopts ceramic condenser.
In the present embodiment, the resistance of above-mentioned regulating resistance R6 is 5 Ω, to ensure the voltage that R6 has point compression functions R6 can be avoided again to divide too high; Divider resistance R5, regulating resistance R6, sampling resistor R7, sampling resistor R8 adopt high pressure Chip-R, and filter capacitor C1 and filter capacitor C2 adopts high pressure patch capacitor, to reduce volume shared by drive circuit.
Below be only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, not departing from the some improvements and modifications under the utility model principle prerequisite, protection range of the present utility model should be considered as.
Claims (7)
1. antisurge LED power circuit, comprises bridge heap rectification module, constant flow module and LED load; Described constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; The output of described LED load positive pole connecting bridge heap rectification module, negative pole connects the D pole of metal-oxide-semiconductor Q1; The power input of current constant control chip IC 1 is connected to the output of bridge heap rectification module by divider resistance R5; The sampling end of current constant control chip IC 1 is connected respectively to D pole and the S pole of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8, the S pole of metal-oxide-semiconductor Q1 is also connected to the output of current constant control chip IC 1 by regulating resistance R6 ground connection, G pole; It is characterized in that, also comprise surge protection module, described surge protection module comprises fuse F1, thermistor NTC, piezo-resistance UR, fuse F1 and thermistor NTC connects, described bridge heap rectification module has two inputs, and an one input connects civil power zero line, and another input is connected civil power live wire by fuse F1 with thermistor NTC, and fuse F1 connecting bridge heap rectification module, thermistor NTC connects civil power live wire; Piezo-resistance UR one end connects civil power zero line, and the other end is connected between fuse F1 and thermistor NTC.
2. antisurge LED power circuit according to claim 1, is characterized in that, described bridge heap rectification module comprises full-bridge rectification bridge heap BD1 and filter capacitor C3, and two inputs of full-bridge rectification bridge heap BD1 connect civil power zero line and fuse F1 respectively; The direct current output cathode of full-bridge rectification bridge heap BD1 is connected with the positive pole of LED load with divider resistance R5, the direct current output negative pole ground connection of full-bridge rectification bridge heap BD1; Filter capacitor C3 is connected in parallel between full-bridge rectification bridge heap BD1 direct current output negative pole and direct current output cathode.
3. antisurge LED power circuit according to claim 2, it is characterized in that, also comprise and fill out paddy circuit, this is filled out paddy circuit and comprises electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, electric capacity C4 one end connects the direct current output cathode of full-bridge rectification bridge heap BD1, the negative pole of other end connection diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, and the negative pole of diode D2 connects the direct current output cathode of full-bridge rectification bridge heap BD1; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
4. antisurge LED power circuit according to claim 3, it is characterized in that, also comprise for isolating the diode D1 filling out paddy circuit and bridge heap rectification module, output, the negative pole of diode D1 positive pole connecting bridge heap rectification module connect electric capacity C4, the negative pole of diode D2, divider resistance R5, LED load positive pole simultaneously.
5. the antisurge LED power circuit according to claim 3 or 4, it is characterized in that, the capacitance of described electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, and the negative pole of electric capacity C4 connects the negative pole of diode D4, the minus earth of electric capacity C5.
6., according to the arbitrary described antisurge LED power circuit of Claims 1-4, it is characterized in that, described LED load two ends are also parallel with filter capacitor C2.
7., according to the arbitrary described antisurge LED power circuit of Claims 1-4, it is characterized in that, the resistance of described regulating resistance R6 is 5 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520432484.7U CN204697354U (en) | 2015-06-23 | 2015-06-23 | Antisurge LED power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520432484.7U CN204697354U (en) | 2015-06-23 | 2015-06-23 | Antisurge LED power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204697354U true CN204697354U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520432484.7U Expired - Fee Related CN204697354U (en) | 2015-06-23 | 2015-06-23 | Antisurge LED power circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104968101A (en) * | 2015-06-23 | 2015-10-07 | 成都亿信标准认证集团有限公司 | Anti-lightning LED power supply protection circuit |
| CN108539969A (en) * | 2018-04-26 | 2018-09-14 | 王俊 | A kind of shock resistance protective loop of use in driving power |
| CN109378965A (en) * | 2018-12-10 | 2019-02-22 | 西安电子工程研究所 | A kind of Anti-surging current circuit based on timer |
| WO2020037784A1 (en) * | 2018-08-23 | 2020-02-27 | 深圳市国盈光电有限公司 | High voltage anti-surge strobe-free light strip |
| CN111479354A (en) * | 2019-01-04 | 2020-07-31 | 一统光电（江苏）有限公司 | Interference-free low-cost long-life L ED power supply directly using mains supply and L ED lighting appliance thereof |
-
2015
- 2015-06-23 CN CN201520432484.7U patent/CN204697354U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104968101A (en) * | 2015-06-23 | 2015-10-07 | 成都亿信标准认证集团有限公司 | Anti-lightning LED power supply protection circuit |
| CN108539969A (en) * | 2018-04-26 | 2018-09-14 | 王俊 | A kind of shock resistance protective loop of use in driving power |
| CN108539969B (en) * | 2018-04-26 | 2024-04-16 | 王俊 | Impact-resistant protection circuit used on driving power supply |
| WO2020037784A1 (en) * | 2018-08-23 | 2020-02-27 | 深圳市国盈光电有限公司 | High voltage anti-surge strobe-free light strip |
| CN109378965A (en) * | 2018-12-10 | 2019-02-22 | 西安电子工程研究所 | A kind of Anti-surging current circuit based on timer |
| CN109378965B (en) * | 2018-12-10 | 2020-11-17 | 西安电子工程研究所 | Anti-surge current circuit based on timer |
| CN111479354A (en) * | 2019-01-04 | 2020-07-31 | 一统光电（江苏）有限公司 | Interference-free low-cost long-life L ED power supply directly using mains supply and L ED lighting appliance thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20160623 |