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I have a query regarding LM5025C IC Topology-Isolated, (Active clamp forward converter)

Ajesh Babu
Prodigy 30 points
Other Parts Discussed in Thread: LM5025C

I have a query regarding LM5025C IC
Topology-Isolated, (Active clamp forward converter)
Input voltage- 18-75VDC
Output- 3.3V/12A
We used transistor based linear regulator for powering IC(15V). Our input voltage is 18-75VDC. When we supply more than 30VDC the linear regulator is getting heated up. What we observed is the LM5025IC is taking 55mA supply current

 

Let us know why VCC is going in to current limit mode(55mA)? or will it take 55mA supply current?

Thanks& regards

Ajesh