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Overcurrent protection circuit-based power circuit for LED

An overcurrent protection circuit and power circuit technology, applied in the field of power circuit, can solve the problems of fluctuation of working current and unstable working current of LED, and achieve the effect of stable current, ensuring lighting quality and improving service life.

Inactive Publication Date: 2018-02-09
CHENGDU SAIPUQI 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 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 based on overcurrent protection circuit

Method used

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  • Overcurrent protection circuit-based power circuit for LED
  • Overcurrent protection circuit-based power circuit for LED
  • Overcurrent protection circuit-based power circuit for LED

Examples

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Embodiment

[0020] like figure 1 As shown, the LED power supply circuit based on the overcurrent protection 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 an overcurrent protection circuit. Circuit and 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...

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Abstract

The invention discloses an overcurrent protection circuit-based power circuit for an LED. The power circuit is characterized by mainly comprising a drive 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, an overcurrent protection circuit and a power output circuit. Power supply current and voltage can be processed by combining a BP3108 integrated chip with a peripheral circuit, thereby ensuring that the LED is provided with stable current. Therefore, the lighting quality of the LED can be ensured, the service life ofthe LED is prolonged and the overcurrent protection circuit-based power circuit for the LED is suitable for promotion and application.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit for LEDs based on an overcurrent protection circuit. 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. This is a power supply circui...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50H05B45/37Y02B20/30
Inventor 余泓德
Owner CHENGDU SAIPUQI TECH CO LTD