TPS737: Loss and thermal estimation

Anders Yang

Prodigy 570 points

Part Number: TPS737

Hi,

I use TPS73701DBR Vin=3.3V, Vo=2.5V, Io=0.6A. Ta is 65C degree without fan.

Could it well work within thermal derating?

I calculated: 65+(3.3-2.5)*0.6*58.9=93.3C. is it right?

over 6 years ago

0 JCHK over 6 years ago

TI__Guru 50060 points

Hi Anders,

Normally TJA is the parameter to use to estimate the thermal performance of the device. That being said, since the TJC is higher than TJA, the device temperature is just a little bit lower. Please note, both of these numbers assume a JEDEC standard High-K board. Please check this short video on thermals.

I hope this answers your question.

0 Anders Yang over 6 years ago in reply to JCHK

TI__Prodigy 570 points

Thanks for your great help.

Power management

Power management forum

TPS737: Loss and thermal estimation