Boosted Circuit Based on MC34063

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asa1995
asa1995's picture
Boosted Circuit Based on MC34063

你好〜

我是一个新手,我想问一些有关基于MC34063A的升压电路的建议。MC34063A数据表

当输出为30V,电流为70mA,振荡频率为33K时,输入电压为5V。

我选择的二极管是IN5819(SS14)

定时电容器/ Ct = 1047 pF

峰值电流Ipk = 1029mA

限流电阻/Rsc=0.292ohm

电感/ Lmin = 102uH

滤波电容/ Co = 33uF

R = 180欧姆

R1 = 2.7k R2 = 62k(29.95V)

我不知道为什么我生成电路之后,发短信输出电压大于29V。但是电压会很快下拉。事实上,目前只有10mA左右。而MC34063太热了。

有人可以帮我吗?非常感谢。

Tooom
Tooom's picture
I know a website of
I know a website of components,you can find many datasheets of the part, hope it can help you