摘要
本文首先介绍了开关电源的脉冲宽度控制工作原理,然后通过应用TL494脉宽调制器,在印制板上实现由±18V转换到±50V的DC-DC变换的电路,给出低电压-高电压输出的DC-DC电路的新思路,并给出该DC-DC电源进行PCB设计时的注意事项,使人们了解到开关电源的设计方便性和可靠性。
This paper firstly introduces the working principle of pulse-width modulation（PWM）, then introduces a design of voltage changing circuit from ±18 V to ± 50 V DC-DC that bases on printed circuit board（PCB） by using TL494 pulse width modulation. The suggestion of PCB design and its convenience and circuit reliability are given at last.
出处
《国外电子测量技术》
2008年第8期61-62,68,共3页
Foreign Electronic Measurement Technology
