Part Number:LM5023
Tool/software: WEBENCH® Design Tools
I am using LM5023 to build a DC/DC. Input voltage is 30 to 120V and output is 12V. I built a prototype and bread board and I only can run 25 ms and then IC turning off and then will repeat again. I checked the Vcc is ramping between 7.5V to 12V. I don't know why it happens.
My V(QR) setting is from Webench result. (36.4K and 12.1K)
Also I found the switching frequency only 46KHz. The IC has fix operation frequency 130KHz?
Please advise.
Thank you!
Johnson