LED digital flat soft light lamp power source based on surge current restriction circuit

A technology for limiting circuit and inrush current, applied in the field of electronics, can solve the problems of unstable output voltage and current, and achieve the effect of improving reliability, improving quality and ensuring brightness

Inactive Publication Date: 2016-10-26
CHENGDU SAIPUQI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current in the LED digital flat sof

Method used

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  • LED digital flat soft light lamp power source based on surge current restriction circuit
  • LED digital flat soft light lamp power source based on surge current restriction circuit

Examples

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Example Embodiment

[0017] Example

[0018] Such as figure 1 As shown, the present invention mainly consists of a voltage regulator chip U2, a transformer T, a diode rectifier U1, a transistor VT1, a surge current limiting circuit connected in series between the negative output end of the diode rectifier U1 and the base of the transistor VT1, the anode and the diode The positive output terminal of the rectifier U1 is connected, the negative electrode is connected to the negative output terminal of the diode rectifier U1, and the grounded polar capacitor C1. The polar capacitor C2 connected to the GND pin of the chip U2, the overvoltage and overcurrent protection circuit connected to the diode rectifier U1 and the voltage regulator chip U2, and the adjustable constant current drive connected to the overvoltage and overcurrent protection circuit Circuit composition.

[0019] The emitter of the transistor VT1 is connected to the VIN pin of the voltage regulator chip U2; the same-named end of the inducto...

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PUM

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Abstract

The invention discloses an LED digital flat soft light lamp power source based on a surge current restriction circuit. The power source is characterized by mainly comprising a voltage stabilization chip U2, a transformer T, a diode rectifier U1, a triode VT1, a polarity capacitor C1, a polarity capacitor C2, an overvoltage overcurrent protection circuit, the surge current restriction circuit connected in series between a negative electrode output end of the diode rectifier U1 and a base electrode of the triode VT1, and an adjustable constant current driving circuit connected with the overvoltage overcurrent protection circuit. The power source is advantaged in that instant high voltage can be eliminated or inhibited, back-end electronic components and LED digital flat soft light lamps can be effectively prevented from being damaged by high voltage, voltage and current adjustment can be further realized, so the output voltage and the output current can be made to be consistent with a reference voltage and a reference current required by the LED digital flat soft light lamps, and thereby stable voltage and current output is guaranteed.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an LED digitized flat panel soft light power supply based on a surge current limiting circuit. Background technique [0002] LED digital flat panel soft light is a new generation of green and environment-friendly light source that uses low-power LED to form surface light and combines with high transmittance soft light plate. LED digital flat panel soft light has the characteristics of soft and uniform illumination, no infrared rays and ultraviolet rays, the surface brightness is lower than that of tricolor fluorescent lamps, no glare, and no glare. At present, LED digital flat panel soft light is widely used in professional photography and photography as supplementary light because of its above-mentioned characteristics. However, the existing LED digital flat soft light power supply has the problem of unstable output voltage and current, which causes the brightness of the LED digital ...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00H05B45/345
CPCH05B45/37
Inventor 不公告发明人
Owner CHENGDU SAIPUQI TECH CO LTD
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