TPS82130: TPS82130 thermal test method

Charles Zhang1

Part Number: TPS82130

Hi there,

TPS82130 integrates inductor on the top side, so it is quite hard to paste thermal wire on it to measure the top side temperature. Then, how to measure the temperature and calculate the junction temperature? Thanks.

over 3 years ago

0 Lishuang Zhao over 3 years ago

TI__Expert 7500 points

Hi Charles,

Jean is looking into this, will feedback to you soon.

Thanks,

Lishuang

0 Jean Picard over 3 years ago

TI__Intellectual 1125 points

Charles Zhang1

A better way is probably by monitoring the Vf of the body diode of the PG output, so you can determine the junction temperature, it's a PN junction.

Regards

0 Charles Zhang1 over 3 years ago in reply to Jean Picard

TI__Expert 3010 points

Hi Jean,

Thanks for your reply.

Did you mean the Vf between PG pin and GND? Is there any reference data like the curve of Vf vs. temp?

Regards,

Charles

0 Jean Picard over 3 years ago in reply to Charles Zhang1

TI__Intellectual 1125 points

Charles Zhang1

Yes, this is between PG and GND.

There is no reference data for this curve, and it may slightly vary from device to next one.

First, you will need to characterize the diode Vf at a low diode forward current over temperature, while the device is not dissipating any power.

Regards

Jean

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TPS82130: TPS82130 thermal test method