Output current adjustable and controllable LED driver and driving method

Output current adjustable and controllable LED driver and driving method

The invention discloses an output current adjustable and controllable LED (Light-emitting Diode) driver and a driving method. The driver comprises an EMI (Electro-Magnetic Interference) rectifier bridge circuit, an energy storage inductor, an isolated unit, an energy storage capacitor, a power grid...

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Hauptverfasser: QIAN JING, CHEN DIQUAN
Format: Patent
Sprache:chi ; eng
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ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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creator QIAN JING
CHEN DIQUAN
description The invention discloses an output current adjustable and controllable LED (Light-emitting Diode) driver and a driving method. The driver comprises an EMI (Electro-Magnetic Interference) rectifier bridge circuit, an energy storage inductor, an isolated unit, an energy storage capacitor, a power grid quality control unit, an energy coupling unit, a first electronic switch, a second electronic switch, a power control unit, an output current control unit, an intelligent control unit, a first voltage sampling circuit, a second voltage sampling circuit, a third voltage sampling circuit, a first current sampling unit, a second current sampling unit, a third current sampling unit, a fourth current sampling unit and a fifth current sampling unit. The driver can perform closed-loop control and adjustment on current output to an LED load according to a nonlinear relationship of the V-I (Voltage-Current) characteristic of the LED load, optimizes power output to the LED load, is high in driving efficiency, long in service
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subjects ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
title Output current adjustable and controllable LED driver and driving method
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