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Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance

A drive circuit and anti-shock technology, applied in the field of soft-start anti-shock LED constant current lighting lamp drive circuit, can solve the problems of lack of shock resistance, shortened life, low efficiency, etc., and achieve the effect of ideal effect and prolong life.

Inactive Publication Date: 2013-03-13
房林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many energy-saving lamps made of white LEDs in the market, but their driving circuits are simple resistor-capacitor step-down or constant voltage drive, which have disadvantages such as low efficiency, large current changes, and no impact resistance. LED premature light failure, resulting in shortened life

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  • Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance

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Embodiment Construction

[0008] like figure 1 As shown in the figure, the soft-start anti-shock LED constant current lighting drive circuit of the present invention consists of a 1A fuse tube BX, a 470kΩ resistor R1, a 82kΩ resistor R2, a 60kΩ resistor R3, a 60Ω-140Ω resistor R4, and a 1N4007 type diode (D1 , D2, D3, D4, D5), 4.7μF capacitor C1, 2.2μF capacitor C2, 2.2μF capacitor C3, 103 capacitor C4, 682 capacitor C5, 13005 transistor Q1, 8550 transistor Q2, 8550 transistor Q3 , TL431 three-terminal adjustable shunt reference source IC1, in which the e pole of the transistor Q1 is connected to one end of the capacitor C5, one end of the resistor R4, one end of the capacitor C4, and the reference pole of the three-terminal adjustable shunt reference source IC1. The c pole is connected to the other end of the capacitor C5 and the negative pole of the LED lamp 1, the b pole of the transistor Q1 is in phase with one end of the resistor R3, the other end of the capacitor C4, the cathode of the three-term...

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Abstract

The invention relates to a drive circuit of a light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance, which comprises a fuse tube BX, resistances (R1, R2, R3 and R4), diodes (D1, D2, D3, D4 and D5), capacitors (C1, C2, C3, C4 and C5), transistors (Q1, Q2 and Q3) and a shunt reference source IC1 with three adjustable ends, wherein the transistor Q2, the resistance R3 and the capacitor C3 constitute a soft start circuit; the transistor Q3, the resistance R1, the resistance R2 and the capacitor C1 constitute a circuit for providing a tapping passage to the capacitor C3; and the transistor Q1, the shunt reference source IC1 with the three adjustable ends, the resistance R3 and the resistance R4 constitute a constant current circuit. The invention provides a set of LED constant current illuminating lamp circuits with the characteristics of the soft start and the shock resistance, which prolongs the service life of LED and has good effect after being used.

Description

technical field [0001] The invention belongs to the field of lighting circuit drive control, in particular to a drive circuit for a soft-start, shock-resistant LED constant-current lighting lamp. Background technique [0002] Due to the advantages of environmental protection, long life, and high photoelectric efficiency, LEDs have been widely used in the civil field in recent years. At present, there are many energy-saving lamps made of white LEDs in the market, but their driving circuits are simple resistor-capacitor step-down or constant-voltage drives, which have the disadvantages of low efficiency, large current changes, and no impact resistance. LEDs prematurely decay, resulting in a shortened lifespan. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a driving circuit for an LED constant current illuminating lamp, which has soft-start and anti-shock capabilities. [0004] The soft-start anti-shock LED constant current lighting dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H02H9/04
Inventor 房林卢会水
Owner 房林