Other Parts Discussed in Thread: UC2845 , UC1845 , UC2843 我做的是一个20W的反激电源。片子的供电电压16V,PWM输出频率150KHz。烤机后发现片子温升有55度。后来把MOS管去掉,PWM脚接个10k的电阻,温升也有40度,测得工作电流20mA。不知道是我的电路参数有问题,还是SOIC-8封装的UC2845本身就有这么大的功耗?
你好,附件有设计的过程和工具供你参考,希望能帮到你。
http://www.ti.com.cn/tool/cn/powerstage-designer?keyMatch=Power Stage Designer of Most Commonly Used Switchmode Power Supplies&tisearch=Search-CN
Other Parts Discussed in Thread: UC3842 , UC3843 , UC3844 , UC3845 This application note provides a functional description of the UC3842 family and highlights the features of each individual member, the UC3842, UC3843, UC3844 and UC3845 Throughout the text,…