CN204131795U - all solid state high voltage LED drive circuit - Google Patents
all solid state high voltage LED drive circuit Download PDFInfo
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- CN204131795U CN204131795U CN201420559322.5U CN201420559322U CN204131795U CN 204131795 U CN204131795 U CN 204131795U CN 201420559322 U CN201420559322 U CN 201420559322U CN 204131795 U CN204131795 U CN 204131795U
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Abstract
The utility model discloses a kind of all solid state high voltage LED drive circuit, belongs to LED lamp field.Comprise the two-way TVS pipe, rectifier bridge and the constant-current drive circuit that are connected successively, wherein, L, N that input and the civil power of described two-way TVS pipe input hold and are connected, described constant-current drive circuit comprises more than 2 or 2 paired CRD chips parallel with one another, and the output of constant-current drive circuit is connected with high-voltage LED.The all solid state high voltage LED drive circuit of said structure can be applied in filament bulb lamp, aluminium base/ceramic substrate bulb lamp, COB(ChipOnBoard) in the LED lamp such as light source board, T-shaped fluorescent tube, there is compact conformation, reliability is high, circuit precision is high, through installing test (access of standard civil power), whole lamp efficiency reaches 90%, and power factor is more than 0.9, harmonic distortion is low, without EMI problem.
Description
Technical field
The utility model relates to a kind of all solid state high voltage LED drive circuit, belongs to LED lamp field.
Background technology
LED is a kind of can be the semiconductor device of luminous energy by converting electric energy, belongs to solid state light emitter, has the advantages such as extra long life, energy-efficient, safe and reliable, environmental protection, is widely used in various illumination occasion.
LED is by the unilateal conduction device of current drives, and civil power must supply the suitable electric current of LED through power conversion, and driving LED lamp pearl is luminous.The drive circuit of the LED that Vehicles Collected from Market is sold mainly is divided into two large classes: 1. isolation/non-isolated the drive circuit of Switching Power Supply pattern, and electrical property is good, but circuit structure is complicated, and cost is high, and reliability is general, has the EMI problem that cannot overcome; 2. resistance-capacitance depressurization mode driving circuit, circuit structure is simple, and cost is low, but poor electrical performance, poor reliability.
Along with the progress of technology, high-voltage LED (HVLED) application becomes main flow and the line of production in market gradually, be characterized in the low forward current of high forward voltage drop, substitute the common DCLED of Same Efficieney, HVLED can significantly improve light efficiency, reduce the loss of power, its driving also seems more and more important.
In view of this, the present inventor studies this, and develop a kind of all solid state high voltage LED drive circuit specially, this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of all solid state high voltage LED drive circuit, and have compact conformation, reliability is high, and circuit precision is high, is applicable to the lamp applications of the various occasion of various form.
To achieve these goals, solution of the present utility model is:
All solid state high voltage LED drive circuit, comprise the two-way TVS pipe, rectifier bridge and the constant-current drive circuit that are connected successively, wherein, L, N that input and the civil power of described two-way TVS pipe input hold and are connected, described constant-current drive circuit comprises more than 2 or 2 paired CRD chips parallel with one another, and the output of constant-current drive circuit is connected with high-voltage LED.
As preferably, above-mentioned two-way TVS pipe can adopt P4KE150/P4KE300-400W_TVS, or P6KE150/P4KE300-600W_TVS.L, N termination of civil power input enters two-way TVS pipe, can the abnormal impact to constant-current drive circuit and high-voltage LED of bypass electrical network effectively, improves circuit reliability.
As preferably, above-mentioned rectifier bridge can require choose according to the difference of continuous current size.Such as, 6WLED lamp needs 40mA drive current, can select MB6F/0.5A rectifier bridge.
As preferably, the HCR10XX series CRD chip that above-mentioned CRD chip can select Hua Yue Microelectronics Co., Ltd. to produce, this serial CRD product constant current interval is wide, can the straight constant current of voltage range from 10V to 250V, and has negative temperature characteristic.
Above-mentioned all solid state high voltage LED drive circuit operation principle: civil power input, through two-way TVS pipe, rectifier bridge full-wave rectification, obtains the pulsating dc voltage of twice mains frequency after rectification, peak value is close to the line voltage of 1.4 times.This pulsating dc voltage is added in the series loop be made up of constant-current drive circuit and high-voltage LED, and when the voltage difference at constant-current drive circuit two ends is greater than 5V, constant-current drive circuit enters constant current operation interval, drives high-voltage LED luminous.Constant-current drive circuit needs 2 groups of uses in parallel usually, also can adopt 2 groups or 4 groups of parallel connections according to the power requirement of whole lamp, so just can meet most of application demand.Constant-current drive circuit parallel connection uses, and can improve constant current accuracy, reduces device specification sequence, solves the utilization rate problem that device causes because of parameter discrete, is applicable to producing in enormous quantities.
The all solid state high voltage LED drive circuit of said structure can be applied in filament bulb lamp, aluminium base/ceramic substrate bulb lamp, COB(Chip On Board) in the LED lamp such as light source board, T-shaped fluorescent tube, mainly there is following several advantage:
1,whole drive circuit adopts solid-state components and parts completely, does not use passive component, avoids the problems such as the parameters precision that passive component brings is low, reliability is low, actual life is low.The whole circuit for lamp design of all-semiconductor chip, have compact conformation, reliability is high, and circuit precision is high, is very easily made into various forms of lighting;
2,by the CRD chip of multiple parallel connection as constant-current drive circuit, have electric property superior, through installing test (access of standard civil power), whole lamp efficiency reaches 90%, and power factor is more than 0.9, and harmonic distortion is low, without EMI problem.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is all solid state high voltage LED drive circuit schematic diagram of embodiment 1.
Embodiment
As shown in Figure 1, all solid state high voltage LED drive circuit, comprise the two-way TVS pipe, rectifier bridge and the constant-current drive circuit that connect successively, wherein, L, N that input and the civil power of described two-way TVS pipe input hold and are connected, described constant-current drive circuit comprises 2 CRD chips parallel with one another, and the output of constant-current drive circuit is connected with high-voltage LED.Whole drive circuit adopts solid-state components and parts completely, does not use passive component, avoids the problems such as the parameters precision that passive component brings is low, reliability is low, actual life is low.The whole circuit for lamp design of all-semiconductor chip, have compact conformation, reliability is high, and circuit precision is high, is very easily made into various forms of lighting.
In the present embodiment, described two-way TVS pipe can adopt P4KE150/P4KE300-400W_TVS, also can adopt P6KE150/P4KE300-600W_TVS.L, N termination of civil power input enters two-way TVS pipe, can the abnormal impact to constant current driving group and high-voltage LED of bypass electrical network effectively, improves circuit reliability.
Described rectifier bridge can require to choose according to the difference of continuous current size.Such as, 6WLED lamp needs 40mA drive current, can select MB6F/0.5A rectifier bridge.
The HCR10XX series of products that described CRD chip can select Hua Yue Microelectronics Co., Ltd. to produce, this serial CRD product constant current interval is wide, can the straight constant current of voltage range from 10V to 250V, and has negative temperature characteristic.
Above-mentioned all solid state high voltage LED drive circuit operation principle: civil power input, through two-way TVS pipe, rectifier bridge full-wave rectification, obtains the pulsating dc voltage of twice mains frequency after rectification, peak value is close to the line voltage of 1.4 times.This pulsating dc voltage is added in the series loop be made up of constant-current drive circuit and high-voltage LED, and when the voltage difference at constant-current drive circuit two ends is greater than 5V, constant-current drive circuit enters constant current operation interval, drives high-voltage LED luminous.High-voltage LED specification common in the market has 18V, 24V, 48V, 50V, 55V etc., also can be in series with pressure common (DCLED) finished product lamp pearl.The lamp pearl quantity that design adopts, with the total series voltage of lamp pearl for foundation.Constant-current drive circuit needs 2 groups of CRD chip parallel connections to use usually, also can adopt 4 groups of parallel connections according to the power requirement of whole lamp, so just can meet most of application demand.Constant-current drive circuit parallel connection uses, and can improve constant current accuracy, reduces device specification sequence, solves the utilization rate problem that device causes because of parameter discrete, is applicable to producing in enormous quantities.Under standard line voltage 220V/110V, through installing test, whole lamp efficiency reaches 90%, and power factor is more than 0.9, and harmonic distortion is low, without EMI problem.
When all solid state high voltage LED drive circuit described in the present embodiment is applied in filament bulb lamp, whole drive circuit can be assemblied on independent pcb board, and pcb board material can be resin-insulated material, aluminium base, ceramic substrate.Because monoblock drive circuit module volume is very little, can easily put into E14 lamp holder.
When all solid state high voltage LED drive circuit described in the present embodiment is applied in aluminium base/ceramic substrate bulb lamp, aluminium base/the ceramic substrate customized welds each components and parts of LED lamp bead, all solid state high voltage LED drive circuit, the lamp plate that welded loads in bulb lamp housing, is namely a complete LEDbulb lamp.
When all solid state high voltage LED drive circuit described in the present embodiment is applied in COB(Chip On Board) light source board time, high voltage LED chip is directly encapsulated on aluminium base/ceramic substrate, each components and parts of all solid state high voltage LED drive circuit are welded on substrate, substrate can make various shape, to be applicable to bulb lamp, ceiling light etc.
When all solid state high voltage LED drive circuit described in the present embodiment is applied in T-shaped fluorescent tube, each components and parts of all solid state high voltage LED drive circuit and LED lamp bead are welded on same wiring board, because drive circuit module area occupied is very little, the termination putting into fluorescent tube can be easy to.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.
Claims (4)
1. all solid state high voltage LED drive circuit, it is characterized in that: comprise the two-way TVS pipe, rectifier bridge and the constant-current drive circuit that are connected successively, wherein, L, N that input and the civil power of described two-way TVS pipe input hold and are connected, described constant-current drive circuit comprises more than 2 or 2 paired CRD chips parallel with one another, and the output of constant-current drive circuit is connected with high-voltage LED.
2. all solid state high voltage LED drive circuit as claimed in claim 1, is characterized in that: described two-way TVS pipe adopts P4KE150/P4KE300-400W_TVS, or P6KE150/P4KE300-600W_TVS.
3. all solid state high voltage LED drive circuit as claimed in claim 1, is characterized in that: described rectifier bridge selects MB6F/0.5A rectifier bridge.
4. all solid state high voltage LED drive circuit as claimed in claim 1, is characterized in that: the HCR10XX series CRD chip that described CRD chip selects Hua Yue Microelectronics Co., Ltd. to produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559322.5U CN204131795U (en) | 2014-09-26 | 2014-09-26 | all solid state high voltage LED drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559322.5U CN204131795U (en) | 2014-09-26 | 2014-09-26 | all solid state high voltage LED drive circuit |
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| CN204131795U true CN204131795U (en) | 2015-01-28 |
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| CN201420559322.5U Active CN204131795U (en) | 2014-09-26 | 2014-09-26 | all solid state high voltage LED drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902656A (en) * | 2015-07-01 | 2015-09-09 | 上海顿格电子贸易有限公司 | Driving circuit of LED (light-emitting diode) lamp as well as lighting equipment |
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2014
- 2014-09-26 CN CN201420559322.5U patent/CN204131795U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902656A (en) * | 2015-07-01 | 2015-09-09 | 上海顿格电子贸易有限公司 | Driving circuit of LED (light-emitting diode) lamp as well as lighting equipment |
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