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东芝43AGUC、50AGUC等AG系列背投彩电。开关电源初级电路Q80l采用半桥式直流变换厚膜电路STR-Z4479,次级Z801采用日立公司的稳压和保护电路专用模块HICl026A。该系列背投彩电设有完善的过流、过压保护功能,当开关电源或扫描电路发生故障时,大多进入保护状态。一、保护电路工作原理该系列彩电利用STR-Z4479(Q801)内部的保护功能,在开关电源初级设计了过压保护、过流保护和过热保护电路。电路比较简单,主要保护电路均在
Toshiba 43AGUC, 50AGUC AG series of rear projection TVs. Switching power supply primary circuit Q80l half-bridge DC-DC conversion thick film circuit STR-Z4479, secondary Z801 using Hitachi’s regulator and protection circuit-specific module HICl026A. This series of rear projection TVs with a perfect over-current, over-voltage protection, when the switching power supply or scanning circuit failure, most of the protection state. First, the protection circuit works This series of color TV using STR-Z4479 (Q801) internal protection, the primary design of the switching power supply over-voltage protection, over-current protection and over-temperature protection circuit. Circuit is relatively simple, the main protection circuit are