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Power supply circuit used for LED

A technology of power supply circuit and circuit, which is applied in the direction of electric light source, electroluminescent light source, light source, etc., can solve the problems of working current fluctuation and LED working current instability, and achieve the effects of prolonging life, ensuring lighting quality and improving service life

Inactive Publication Date: 2016-10-26
CHENGDU HANXING 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 used for LED

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Embodiment

[0015] Such as figure 1 As shown, the power supply circuit for the LED of the present invention is mainly composed of a driving chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, a diode D2, a power input circuit and a power output circuit. Specifically, the power input circuit is respectively connected to the VCC pin and the DIM pin of the driving 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 driving chip U1. The P pole of the diode D1 is connected to the HCD pin of the driving chip U1 through the resistor R2, and the N pole is connected to the VCC pin of the driving chip U1. The power output circuit is respectively connected to the FB pin and the GATE pin of the driving chip U1. The P pole of the diode D3 is connected to the HCD pin of the driving chip U1, and the N pole is connected to the power output circuit. The positive electrode of the capacitor C4 is connected to th...

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Abstract

The invention discloses a power supply circuit used for an LED. The power supply circuit is characterized in that the power supply circuit is mainly composed of a driving chip U1, a resistor R1, a resistor R2, a capacitor C4, a diode D1, a diode D2, a power supply input circuit and a power supply output circuit. Power supply current and voltage can be processed by adopting a BP3108 integrated chip with combination of a peripheral circuit so that stable current is ensured to be provided to the LED, the lighting quality of the LED can be ensured, the service life of the LED can be enhanced and thus the power supply circuit used for the LED is suitable for popularization and application.

Description

Technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit for LEDs. Background technique [0002] LED gradually replaced the traditional lighting lamp due to its energy saving and long service life, and became the first choice of people. However, at present, most of the power supplies used by LEDs have the problem that the working current is easily affected by the supply current and fluctuates, which makes the working current of the LED unstable, which affects the lighting quality of the LED and shortens the service life of the LED. Summary of the invention [0003] The purpose of the present invention is to overcome the problem that most of the power supplies currently used in LEDs have the problem that the working current is easily affected by the power supply current and fluctuates, which makes the working current of the LED unstable. It is not only simple in structure, but also able to provide Power supply circuit for LED ...

Claims

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Application Information

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