Constant-voltage driving power supply for white-light LEDs

A technology of driving power supply and white light, which is applied in the electronic field, can solve the problem of low stability and achieve the effect of simple LED power supply

Inactive Publication Date: 2016-08-03
CHENGDU BAIMIAO NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of low stability of the traditional LED drive power supply, and provide a constant voltage drive power supply for white LEDs

Method used

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  • Constant-voltage driving power supply for white-light LEDs

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Embodiment

[0015] Such as figure 1 As shown, the constant voltage driving power supply for white light LED of the present invention is mainly composed of a diode rectifier U, a transformer T, a control chip U1, an amplifier P1, a resistor R4, a resistor R3, a resistor R5, a Zener diode D4, an input anti-interference circuit, and a gate Pole drive circuit and constant voltage output circuit.

[0016] When connected, the input anti-interference circuit is connected in series between the positive output terminal of the diode rectifier U and the primary inductance coil L1 of the transformer T. The resistor R3 is connected in series between the negative output terminal of the diode rectifier U and the VCC pin of the control chip U1. The gate drive circuit is connected in series between the primary inductance coil L2 of the transformer T and the control chip U1. The N pole of the Zener diode D2 is connected to the negative pole of the amplifier P1 through the resistor R4, and its P is ground...

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Abstract

The invention discloses a constant-voltage driving power supply for white-light LEDs. The constant-voltage driving power supply is characterized by mainly comprising a diode rectifier U, a transformer T, a control chip U1, an amplifier P1, an input anti-interference circuit which is connected in series between the positive output end of the diode rectifier U and a primary inductance coil L1 of the transformer T, a resistor R3 which is connected in series between the negative output end of the diode rectifier U and a VCC pin of the control chip U1, a gate drive circuit which is connected in series between a primary inductance coil L2 of the transformer T and the control chip U1, a voltage stabilizing diode D2 of which the N pole is connected with the negative pole of the amplifier P1 through a resistor R4 and the P pole is grounded, a resistor R5 of which one end is connected with a GND pin of the control chip U1 and the other end is grounded, and the like. According to the invention, the input voltage can be adjusted to keep the output voltage within a constant range, and the problem that LEDs work unstably and the lighting effect of LEDs is affected due to fluctuation of the mains supply is avoided.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a constant-voltage driving power supply for white LEDs. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. With the popularity of LEDs and the continuous improvement of people's requirements for lighting effects, new challenges have been brought to LED drive power supplies. At present, the stability of the traditional LED driving power is not high, and it is easily affected by the fluctuation of the mains power, which greatly reduces the lighting effect of the LED and cannot meet people's lighting requirements. Contents of the invention [0003] The object of the present invention is to overcome the defect of low stability of the traditional LED driving power supply, and provide a constant voltage driv...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37
Inventor 刘磊
Owner CHENGDU BAIMIAO NETWORK TECH CO LTD
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