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Hi, Support Team
We simulation WEBENCH TPS63805, the IC pd is 2.398W
but If we reference datasheet: PD=(TJ(max)-TA)/Theta JA=(150-25)/78.8 ; Pd=1.58W
wich Pd is correct?
if any suggestion, Please advise me.
Thanks,
Best regards,
Lawrence
Hi Lawrence,
The PD and Theta JA in Webench are calculated value. And the Theta JA in DS is a typical value with stardard layout which means the actual Theta JA can be decreased with a bigger size layout.
Also the PD in DS is the maximum acceptable one with stardard layout.
Regards
Tao