【经验】使用必易微PWM控制功率开关KP3210BSGA观察和理解DCDC的应用和性能

时间： 2022-10-19 来源：世强

技术问答

很多开发设计者在设计电路原理图之前首先会考虑电源部分选用和设计验证；为了方便设计则观察和理解一个DCDC的应用和性能；本验证方案选用了必易微的一颗PWM控制功率开关 KP3210BSGA来看看他的性能；

1.首先参考KP3210BSGA的设计手册的电路原理图；搭建设计实体硬件电路；如下图

图（1）

2.使用是德的开关电源为其提供电源DC（0~50V）；

图（2）

3. 采样示波器测量验证输出端的输出电压；

图（3）

4.通过调节开关电源范围（0~50V）之间变化，总结验证：

1).当为PCB板电源输入低于26VDC时，输出电压会不稳定现象在20VDC以下波动不固定；

2).当为PCB板电源输入在（26~50）V时，输出电压会稳定在20VDC固定；

3).默认12V输出（FB脚悬空）；

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