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2.过流保护电路+12V过流保护电路由运算放大器U7B及其外围电路组成;+24V过流保护电路由U7A及其外围电路组成,对主开关电源输出的+12V或+24V电流进行检测。副电源输出的+30VSB电压:一是通过R93降压、ZD6稳压后,向U7的⑧脚提供工作电压;二是通过U10稳压后,经R83、R85、R82分压向U7B的⑥脚提供
2. Over-current protection circuit +12 V Over-current protection circuit consists of operational amplifier U7B and its peripheral circuits; +24 V over-current protection circuit consists of U7A and its peripheral circuits, the main switching power supply output of +12 V or +24 V current detection . Vice-power output of the + 30VSB voltage: First, step-down by R93, ZD6 regulator, to the U7 ⑧ feet to provide operating voltage; second is regulated by the U10, the R83, R85, R82 partial pressure to the U7B feet ⑥ provide