Part Number: UC3843 Other Parts Discussed in Thread: UC3825 Hi ,Have a good day.
we got a special power requirement that we hope to complete a flyback power supply with a wide voltage output to achieve adjustable output from 0V-250V, and the maximum power…
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?