【摘 要】
：
②N501(ML4800CS)内部电路框图如图3所示。③R系列电源板的PFC电路和PWM主开关电源电路如图4所示。3.380 V的稳压过程N501的輥輳訛脚为PFC跨导电压误差放大器输入端。由R523
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②N501(ML4800CS)内部电路框图如图3所示。③R系列电源板的PFC电路和PWM主开关电源电路如图4所示。3.380 V的稳压过程N501的輥輳訛脚为PFC跨导电压误差放大器输入端。由R523、R524、R525、R526与R520组成分压电路,对380 V电压进行分压,在电阻R520上约得到2.5 V的电压,而N501的輥輳訛脚内部有一个2.5 V的精密电压源。两者相比较,若相等则C529上的电压稳定为380 V;若C529上的电压小于380 V,则在R520上的电压也
②N501 (ML4800CS) internal circuit diagram shown in Figure 3. ③ R series power supply board PFC circuit and PWM main switching power supply circuit shown in Figure 4. 3.380 V regulator process N501 roll 辏 error foot for PFC transconductance voltage error amplifier input. The R523, R524, R525, R526 and R520 make up the partial pressure circuit, divide the voltage of 380 V, get the voltage of 2.5 V on the resistance R520, and the precision of voltage source . The two are compared, if equal to the voltage on C529 is stable to 380 V; if the voltage on C529 is less than 380 V, the voltage on R520 is also
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