UCC28063: power, dissipation

Jin-Suk Choi

Intellectual 2290 points

Part Number: UCC28063

Hi~

Customer request power dissipation of UCC28063.

They got 1.3W value from 3rd party, but they don't know how get that data,

Would you explain how to measure power dissipation of UCC28063 besides transformer and FET loss?

Thanks.

over 8 years ago

0 Brian Johnson96 over 8 years ago

TI__Expert 3200 points

Hi Jin-Suk,

An AE should be helping you soon with your question.

0 John Griffin1 over 8 years ago in reply to Brian Johnson96

TI__Mastermind 34465 points

I think this is how the max power dissipation was calculated.

Thermal shutdown occurs at 160C for the UCC28063.

This allows for a temp rise of 135C if the ambient is 25C.

With a junction to ambient thermal resistance of 92C/W specified for the UCC28063, this allows for a 135/92 W = 1.4W max power dissipation. Allowing for a 10% tolerance, 1.3W is a reasonable value for the max power dissipation of this part.

Regards,

John Griffin

Power management

Power management forum

UCC28063: power, dissipation