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1.副开关电源TCLPWL42C电源板中5V副开关电源电路如图2所示。由厚膜电路IC6、开关变压器T3、取样误差放大电路IC8、光电耦合器IC5等元器件组成。(1)NCPl013简介IC6(NCPl013)是一块准谐振PWM(脉冲宽度调制)控制器,工作在临界(准谐振)模式。内置过载、过电压保护电路。稳压调整采用电流模式控制。能根据负载自动调整输出脉冲的占空比。可用TNY264、TNY266替换,其引脚功能和维修实测对地电压、对
1. Sub switch power supply TCLPWL42C power supply board in the 5V sub switch power supply circuit shown in Figure 2. By thick film circuit IC6, switching transformer T3, sampling error amplifier circuit IC8, optocoupler IC5 and other components. (1) Introduction to NCPl013 The IC6 (NCPl013) is a quasi-resonant PWM (Pulse Width Modulation) controller that operates in critical (quasi-resonant) mode. Built-in overload, over-voltage protection circuit. Voltage regulation using current mode control. According to the load can automatically adjust the output pulse duty cycle. Available TNY264, TNY266 replacement, pin function and maintenance of the measured voltage on the ground, right