Tool/software: WEBENCH® Design Tools
Hi
I am design a 120W Buck converter for the following:
Vin=20-39V
Vout=12V
Iout=10A
( See attached)
When no load condition, output 12V, waveform are correct
CH1: UVLO pin, CH2: SS Pin, Ch3: Vcc pin
When the output current is 2A, VCC drop down to 4V
CH1: UVLO pin, CH2: SS Pin, Ch3: Vcc pin
I have tried to connect VCCDIS to GND, but the situation did not improve,
Is there a better solution ? Please give me advice
thanks!
Austin
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