TPA2000D1-Q1: Thermal Parameter Rjc and Rjb

Hi Sam,

usually, the resistance from junction to ambient can be estimated from the "dissipation rating table" of datasheet. This would yield

R(junction to ambient) = (115°C-105°C) / 0.279W = 36°C/W.

But this calculated value does not match the other entries of table...

Kai

Hi Kai,

Thank you for prompt reply.

Yes, what you provided is Rja (Junction to Case), which can be calculated by PD in datasheet.

But what I need is Rjc and Rjb :  

θjc(Rjc) = Thermal Resistance Junction to Case, °C/W.

θjb(Rjb) = Thermal Resistance Junction to Board, °C/W.

Actually, I can find these two parameters from other TI products, i suppose TPA2000-Q1 should have these parameters as well.

Sam

Hi,

I will be responding tomorrow with further information.

Best Regards
José Luis Figueroa
Audio Applications Engineer

Thank you very much.