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UCC256303: Design Concern of UCC256303 compatible with UCC256403

Part Number: UCC256303
Other Parts Discussed in Thread: UCC256403

Dear TI,

My team is now using UCC256303 as HB LLC controller.

I've notice that there's a update version which is UCC256403, one of the major different between them is minimum detectable slew rate(303=1V/ns and 403=0.1V/ns).

However some suggestions in the forum for fixing UCC256303 failure are replacing it with UCC256403.

So there're my questions:

1. if my team insist to use UCC256303, Is there any further peripheral circuit design suggestion or operation notice if we want the 303 behavior as good as 403 

2. Advantage and disadvantage of UCC256303 and UCC256403, what are the benefits if we use UCC256403?