0～30V通用电源的设计

Design for All- Purpose Power Supply of 0～30V

介绍了一种通用电源的设计,它主要是利用专用芯片TL494产生脉冲宽度调制信号来驱动功率MOSFET开关管进行DC/DC变换,采用改变TL494内部集成运算放大器基准电压来实现输出电压0～30 V的可调。描述了电源模块式的结构,阐述了与之相关的控制电路与保护电路,并对电源进行了测试,得出了相应的波形。

The design of a kind all-purpose power supply is introduced. This method is to drive the power MOSFET switch to carry on the DC/DC transformation by using the pulse-width Modulation signal produced by the special-purpose chip TL494. The adjustable function is carried on by changing the reference voltage of the internal integrated operational amplifier in TL494. This design describes not only the module type structure of the power but also explains its relevant control circuits and protection circuit. Then, it also can test the power and get the relevant waveshape.