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TPS563210EVM-663: TPS563210

Part Number: TPS563210EVM-663

Hello,

We decided to use the converter TPS563210DDF  in one of our products, but we faced  a thermal problem,  as described in the datasheet the IC has a nominal current of 3A, but after many tests a thermal shutdown is activaded at 1.3A ( with heat sink).  Then we decided to test the TPS54427 and we faced many problems with this IC too. Do you have any suggest for a 12V/5V converter with a nominal current of 3 or 4A  and good efficiency  to be integrated in our design. 

Best regards.