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LM5022 work for Duty 100%

Other Parts Discussed in Thread: LM5022

Dear Sir 

1. May I know if I use LM5022 and the Vin = Vout = 52V ,what's the situation will be happened on LM5022  

My SPEC is Vin=24V~48V to 52V/2.3A (120W)

2. If I use Fsw=300KHz to design LM5022 ,how about the smallest choke value ,due to I use webanch to simulation the smallest value is 20uH

Could I use smaller ?? just like 12uH ??

Thanks