CN201830506U

CN201830506U - Underpower light emitting diode (LED) driving power supply

Info

Publication number: CN201830506U
Application number: CN2010205127970U
Authority: CN
Inventors: 赖兵; 陈波; 姚华
Original assignee: Dfine Technology Co Ltd
Current assignee: Dfine Technology Co Ltd
Priority date: 2010-09-01
Filing date: 2010-09-01
Publication date: 2011-05-11
Anticipated expiration: 2020-09-01

Abstract

The utility model discloses an underpower light emitting diode (LED) driving power supply, which relates to the field of electrical lighting, and aims to solve the technical problems of large volume, insufficient reliability and the like in the traditional LED lighting driving power supply. The input end of the power supply disclosed by the utility model is connected with a rectifier filter circuit which is connected with a primary constant-current and constant-voltage circuit and a transformer, and the output end of the transformer is connected with the output end of the power supply, wherein the primary constant-current and constant-voltage circuit adopts a boost convertor pulse-width modulation (PWM)-AP 3706 integrated circuit (IC) in a pulse-width modulation mode, the VCC pin of the primary constant-current and constant-voltage circuit is respectively connected with the input port I (10) and the input port III (12) of the transformer, and the OUT pin of the primary constant-current and constant-voltage circuit is connected with a triode in series and then connected with the input port II (11) of the transformer. The underpower light emitting diode (LED) driving power supply disclosed by the utility model is suitable for the manufacture of LED driving power supplies.

Description

Low-power LED driving power

Technical field

The utility model relates to the electrical lighting field, and particularly a kind of low-power 3WLED that is used for throws light on, as the LED shot-light, and LED indoor landscape lamp etc.

Background technology

According to internal authority personage prediction, it is the novel illumination light source epoch of representative that 21st century will enter with LED.Be called as the 4th generation light source.The LED semiconductor lighting has than the energy-conservation characteristics more than 80% of traditional energy-saving lamp, can substitute existing public lighting and home lighting comprehensively, if the LED product is used in the whole nation 80% illumination, can save power station, the Three Gorges energy output in 1 year, 84,700,000,000 degree every year.Market scale will reach more than 5 trillion yuan.

And at present common on the market LED illuminating lamp is still continued to use traditional design substantially owing to power unit, and there are the following problems with not enough:

1. the integral product volume is big;

2. adopt post-equalization electronic components such as optocoupler, integrated computational calculation power amplifier, system reliability is not enough more.

Summary of the invention

The utility model is intended to solve technical problems such as traditional LED mains lighting supply volume is big, reliability is not enough, so that a kind of low-power LED driving power with characteristics such as volume is little, reliability height to be provided.

The purpose of this utility model is achieved through the following technical solutions.

Low-power LED driving power of the present utility model, the input of power supply connects current rectifying and wave filtering circuit, the latter connects elementary constant-current constant-voltage circuit and transformer, the output of transformer connects this power output end, wherein elementary constant-current constant-voltage circuit adopts the boost converter PWM-AP3706 of pulse-width-modulated mode, its VCC pin connects the input port 1 and the input port 3 12 of transformer respectively, connects the input port 2 11 of transformer behind its OUT pin serial connection triode.

Low-power LED driving power of the present utility model, wherein said current rectifying and wave filtering circuit are rectifier bridge heap VD1.

The beneficial effect of the utility model low-power LED driving power:

1. the utility model adopts elementary constant voltage, the constant current mode scheme, and no optocoupler, devices such as TL431 make cost lower, have more productibility, and reliability is higher.

2. the utility model has used one 0 ohm resistance to replace traditional fuse because power output is 3W, has reduced volume.

Description of drawings

Fig. 1 circuit theory diagrams of the present utility model

The number in the figure explanation:

The pin one of 1～8PWM-AP3706 is to pin eight, the input one of 10～13 transformers is to input four, the output one of 14～15 transformers is to output two, the L live wire, the N zero line, VD1 rectifier bridge heap, VD2 diode one, VD3 diode two, R1～R12 Chip-R one is to Chip-R 12, C1～C6 patch capacitor one is to patch capacitor six, the T transformer, the boost converter PWM-AP3706 of IC pulse-width-modulated mode, the V triode, the VO+ output voltage, the EC electrochemical capacitor

Embodiment

The utility model detailed structure, application principle, effect and effect with reference to accompanying drawing 1, are illustrated by following execution mode.

Low-power LED driving power of the present utility model, the input of power supply connects current rectifying and wave filtering circuit, the latter connects elementary constant-current constant-voltage circuit and transformer, the output of transformer connects this power output end, wherein elementary constant-current constant-voltage circuit adopts the boost converter PWM-AP3706 of pulse-width-modulated mode, its VCC pin connects the input port 1 and the input port 3 12 of transformer respectively, connects the input port 2 11 of transformer behind its OUT pin serial connection triode.Wherein current rectifying and wave filtering circuit is piled VD1 for the rectifier bridge that is made of four resistance annular serial connections.

The pin one of the boost converter PWM-AP3706 of pulse-width-modulated mode is the CS pin, and its output with rectifier bridge heap VD1 is connected; Pin two is the VCC pin, connects the input port 1 and the input port 3 12 of transformer respectively; Pin three is the OUT pin, connects the input port 2 11 of transformer behind the serial connection triode; Pin four is the GND pin, ground connection; Pin five is the FB pin, ground connection behind the serial connection Chip-R R10; Pin six is the VDD pin, ground connection behind the serial connection patch capacitor C4; Pin seven is the BLAS pin, ground connection behind the serial connection Chip-R R6; Pin eight is the COMP pin, ground connection behind the serial connection patch capacitor C3.

Ground connection behind the output serial connection Chip-R R12 of triode V; Input port 4 13 ground connection of transformer; The output port that connects this power supply behind output port one 14 serial connection diodes one VD2 of transformer; Patch capacitor one C1 and Chip-R four R4 cross-over connections are between the output port 2 15 of diode one VD2 and transformer.

Through experimental verification, the utility model has improved the efficient of LED semiconductor lighting in actual use, makes its volume obtain dwindling, and life-span and reliability increase.At present, illumination consumes and accounts for 20% of whole power consumption, and therefore reducing electric consumption on lighting greatly is the important channel of saving the energy, can promote the development of energy-saving, emission-reducing, environment friendly cause comprehensively.

Therefore, adopt low-power LED driving power of the present utility model, have the plurality of advantages such as volume is little, reliability height.

Claims

1. low-power LED driving power, it is characterized in that: the input of power supply connects current rectifying and wave filtering circuit, the latter connects elementary constant-current constant-voltage circuit and transformer, the output of transformer connects this power output end, wherein elementary constant-current constant-voltage circuit adopts the boost converter PWM-AP3706 (IC) of pulse-width-modulated mode, its VCC pin connects the input port one (10) and the input port three (12) of transformer respectively, connects the input port two (11) of transformer behind its OUT pin serial connection triode.

2. low-power LED driving power as claimed in claim 1 is characterized in that: described current rectifying and wave filtering circuit is a rectifier bridge heap (VD1).