Basing on the controller of PWM and MOSFET to gather the chip TOPSwitch-FX TOP234Y,the paper analyzed and ex-plored the design of the electric circuit of adjustable electric voltage switching-mode power supply of digital control. This design re-quests to regulate the steps to add and steps to reduce of electric voltage between 5V and 40V,with the accuracy of amount being 0.2 V, and through the feedback electric c...
