关键词：TOPSwitch-FX；单片开关电源；高频变压器
ABSTRACT
Single-chip switching power supply integrated circuit is the latest evolved in the electronic field. It has the virtues of high integration level, most cost effective lowest component count switcher solution, high performance, forming high efficiency power supply and so on. The latest single-chip switching power supply devices of power integration were investigated particularly in the thesis. Especially, introduced the inside fabric and characteristic of TOPSwitch-Ⅱ and TOPSwitch-FX, The combination switching power supply with multi-output based on TOPSwitch-FX was designed in this paper.
The power supply utilized the multi-function foot—M of TOPSwitch-FX device and the single-chip computer AT89C52 to realized the intelligent control of the multi-output power supply, which was an good circuit to illustrate the main techniques of digital controlled intelligent source module.
The papers introduced in more detail from the intelligent multi-output switching power supply circuit design, high frequency transformer design, SCM(Single Chip Micyoco) control system hardware design. And mapped on the basis of the principles of the system by the use of software Protel99 SE, had obtained the design main point of circuit board print and wiring.
Keywords: TOPSwitch-FX；single-chip switching power supply；high frequency transformer
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