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Design of LED Driver Power Supply Based on Flyback Converter without Photocoupler

Xu Jin

Open publisher page 2 citations

Abstract

In order to realize constant current control and isolation between input and output,in traditional LED power supply using Flyback converter as main circuit,photocoupler is needed to transfer the feedback signal from primary side to secondary side.Consider of the large size of photocoupler and the influence of current transfer ratio due to temperature variation,the Flyback converter with primary side control is used as main circuit to decrease the number of components and the influence of the temperature.Without photocoupler the main circuit has less cost,smaller size,higher power density and less influence of temperature.With this power supply,the LED current can be regulated to realize the control of the lightness and the voltage of the LED can also be controlled to realize the open protection of LED.

About this research paper

What this paper is about

In order to realize constant current control and isolation between input and output,in traditional LED power supply using Flyback converter as main circuit,photocoupler is needed to transfer the feedback signal from primary side to secondary side.Consider of the large size of photocoupler and the influence of current transfer ratio due to temperature variation,the Flyback converter with primary side control is used as main circuit to decrease the number of components and the influence of the temperature.Without photocoupler the main circuit has less cost,smaller size,higher power density and less influence of temperature.With this power supply,the LED current can be regulated to realize the control of the lightness and the voltage of the LED can also be controlled to realize the open protection of LED.

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OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In order to realize constant current control and isolation between input and output,in traditional LED power supply using Flyback converter as main circuit,photocoupler is needed to transfer the feedback signal from primary side to secondary side.Consider of the large size of photocoupler and the influence of current transfer ratio due to temperature variation,the Flyback converter with primary side control is used as main circuit to decrease the number of components and the influence of the temperature.Without photocoupler the main circuit has less cost,smaller size,higher power density and less influence of temperature.With this power supply,the LED current can be regulated to realize the control of the lightness and the voltage of the LED can also be controlled to realize the open protection of LED.

Key concepts: Flyback converter, Flyback diode, Flyback transformer, Constant current, LED circuit, Electrical engineering, Buck–boost converter, Power (physics)

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Design of LED Driver Power Supply Based on Flyback Converter without Photocoupler — Research Paper | ScholarLens