Search International and National Patent Collections

1. (WO2017152456) ALTERNATING CURRENT-TO-DIRECT CURRENT POWER SUPPLY OUTPUT SYSTEM

Pub. No.:    WO/2017/152456    International Application No.:    PCT/CN2016/078882
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Apr 09 01:59:59 CEST 2016
IPC: H02M 7/219
Applicants: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
深圳市华星光电技术有限公司
Inventors: LI, Wenfang
李文芳
LI, Wendong
李文东
Title: ALTERNATING CURRENT-TO-DIRECT CURRENT POWER SUPPLY OUTPUT SYSTEM
Abstract:
An alternating current-to-direct current power supply output system. In addition to providing a bridge rectifier circuit (10), a pulse control module (20), a transformer (30), a rectifier diode module (40) and a voltage feedback module (50), the system is also provided with an over-voltage protection module (60), the over-voltage protection module (60) comprising a voltage stabilizing diode (ZD1) and a triode (Q1). When a direct current voltage output is overly high, the voltage stabilizing diode (ZD1) reversely breaks down and transmits a voltage to the triode (Q1) so as to conduct same, and pulls down the voltage of a negative electrode of an illuminator in a photoelectric coupler (P1) of the voltage feedback module (50), so that the luminous intensity of the illuminator is increased and a photocurrent of a photoceptor in the photoelectric coupler (P1) is increased, and thus the pulse control module (20) is caused to generate protection without outputting a voltage, thereby realizing an over-voltage protection function, and the burnout of a power conversion IC on a followed SOC board and a T-con board when the direct current voltage output is overly high can be prevented.