基于PWM（脈沖寬度調(diào)制）控制器和MOSFET(金屬-氧化物-半導(dǎo)體場(chǎng)效應(yīng)管)集成芯
片TOPSwitch-FX TOP234Y，分析和探討了電壓可調(diào)數(shù)字控制開(kāi)關(guān)電源電路的設(shè)計(jì)。要求對(duì)5～40V 范圍內(nèi)電壓的步加、步減調(diào)節(jié)，步進(jìn)精度為0.2V，并通過(guò)雙向反饋電路提高電壓穩(wěn)定性。
關(guān)鍵詞：數(shù)控開(kāi)關(guān)電源 TOPSwitch-FX 計(jì)數(shù)控制 數(shù)模轉(zhuǎn)換器 電路設(shè)計(jì)
Abstract: Basing on the controller of PWM and MOSFET to gather the chip TOPSwitch-FX
TOP234Y,the paper analyzed and explored the design of the electric circuit of adjustable electric voltage switching-mode power supply of digital control. This design requests 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 circuit to raise the stability of electric voltage.
Key words: digital control switching-mode power supply;TOPSwitch-FX; counting control ;digital –to -analogy converter; design of electric circuit