LED DRIVING CIRCUIT, LED LIGHTING APPARATUS, AND ELECTRONIC DEVICE

WIPO Patent Application WO/2018/214105

A1

An LED driving circuit, comprising a rectifier circuit (101), a filter circuit (102), and a DC conversion module (103). The rectifier circuit (101) is provided with a surge suppression resistor; the DC conversion module (103) comprises a switching circuit, an energy storage circuit (4), a constant current control circuit, and a resonant feedback circuit (2); pulsating direct current supplies power for the energy storage circuit (4); the energy storage circuit (4) is connected to the constant current control circuit; the output of the constant current control circuit is connected to an LED luminescent device (104); the switching circuit is connected to the resonant feedback circuit (2); the resonant feedback circuit (2) is coupled to the energy storage circuit (4); the surge suppression resistor suppresses surge current when the alternating current passes through the rectifier circuit; the resonant feedback circuit (2) resonates electric and magnetic energy changes of the energy storage circuit (4) and inputs feedback current to the switching circuit; when an instantaneous feedback current change rate approaches zero, the switching circuit is turned off; and when an instantaneous induction voltage change rate of the energy storage circuit (4) approaches zero, the switching circuit is turned on.

TAN NICOL (CN)
HUANG ERIC (CN)
LAN FRANKS (CN)
LIU LEO (CN)

PCT/CN2017/085960

November 29, 2018

May 25, 2017

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SHENZHEN H & T INTELLIGENT LIGHTING CO LTD (CN)

H05B37/02; H05B44/00

CN102333406A	2012-01-25
CN201274590Y	2009-07-15
CN103428957A	2013-12-04
CN103096593A	2013-05-08
US20140176000A1	2014-06-26

SHENZHEN LIUJIA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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