Power supply circuit for LED

A power circuit and circuit technology, applied in electric light sources, electroluminescent light sources, light sources, etc., can solve the problems of unstable working current and fluctuation of working current of LED, and achieve the effect of ensuring lighting quality, prolonging life, and stable current.

Inactive Publication Date: 2018-01-16
CHENGDU SAIPUQI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that most of the current power supplies used by LEDs have the problem that the working current is easily affected by the power supply current and fluctuate, resulting in the instability of the working current of the LED. Power supply circuit for LED with stable current

Method used

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  • Power supply circuit for LED
  • Power supply circuit for LED

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Embodiment

[0017] Such as figure 1 As shown, the LED power supply circuit of the present invention is mainly composed of a driver chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, a diode D2, a power input circuit, an emitter drive circuit and a power output circuit. Specifically, the power input circuit is respectively connected to the VCC pin and the DIM pin of the driver chip U1. One end of the resistor R1 is connected to the power input circuit, and the other end is connected to the TRIAC pin of the driver chip U1. The P pole of the diode D1 is connected to the HCD pin of the driver chip U1 through the resistor R2, and the N pole of the diode D1 is connected to the VCC pin of the driver chip U1. The power output circuit is respectively connected to the FB pin and the GATE pin of the driver chip U1. The P pole of the diode D3 is connected to the HCD pin of the driver chip U1, and its N pole is connected to the power output circuit. The anode of the capacitor C4 is ...

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PUM

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Abstract

The invention discloses a power supply circuit for an LED. The power supply circuit is characterized by mainly comprising a driving chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, adiode D2, a power supply input circuit, an emitter driving circuit and a power supply output circuit. By adoption of a BP3108 integrated chip to be combined with a peripheral circuit, power supply current and voltage can be processed, thereby ensuring that a stable current can be provided for the LED; and therefore, the illumination equality of the LED can be ensured, the service life of the LEDcan be prolonged, and the power supply circuit is suitable for popularization and application.

Description

technical field [0001] The invention relates to a power circuit, in particular to a power circuit for LEDs. Background technique [0002] Due to its energy saving and long service life, LED has gradually replaced traditional lighting and has become the first choice for people. However, at present, most of the power supplies used by LEDs have the problem that the operating current is easily affected by the supply current and fluctuates, resulting in unstable operating current of the LED, which affects the lighting quality of the LED and shortens the service life of the LED. Contents of the invention [0003] The purpose of the present invention is to overcome the problem that most of the current power supplies used by LEDs have the problem that the working current is easily affected by the power supply current and fluctuate, resulting in the instability of the working current of the LED. Power supply circuit for LED with stable current. [0004] The present invention real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
Inventor 余泓德
Owner CHENGDU SAIPUQI TECH CO LTD
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