LMR16020: Junction-to-Ambient Versus Junction-to-case (top) Thermal Resistance

Keith Keller

Part Number: LMR16020

Hello,

Could you please explain the difference between the thermal parameters (R_theta_JA) Junction-to-Ambient Thermal Resistance = 42.5oC/W, to (R_theta_JC) Junction-to-Case (top) Thermal Resistance = 56.1oC/W.

Thank you, Keith

over 2 years ago

0 Harrison Overturf over 2 years ago

TI__Genius 10685 points

Hi Keith,

Please take a look at the attached app note which breaks down the difference between the junction-to-ambient and junction-to-case thermal resistances.

Semiconductor and IC Package Thermal Metrics (Rev. C) (ti.com)

Regards,

Harrison Overturf

Power management

Power management forum

LMR16020: Junction-to-Ambient Versus Junction-to-case (top) Thermal Resistance