Other Parts Discussed in Thread: UCC25600EVM, UCC25600, UCC256402
I am working on UCC25640EVM-020 and UCC25600EVM evaluation boards, to design wide input range dc to dc convertor using LLC topology. Input voltage ( 70 V to 140 V ) : 24V output voltage
And I was successful on achieving around ~ 96% efficient system at the nominal input voltage (120V).
However i have a problem, with over load protection and short circuit protection... due to the wide input range, at low input line the over load protection is well programmed, but at high input line the current limit is way to high, due to the sensing method, in both ICs: UCC25600 and UCC25402.
would you be able to help me to find a solution to this issue ? a way to control the output current at full input range ?
Thanks a lot
Looking forward to hear back from you.