Hi Experts,
I ran the Webench with below condition.
Device : LM60430A
Vin : 24V
Vout : 5.15V
Iout : 3A
Tj on Webench shows that Tj becomes 133.61 degC at 30 deg C room temp.
It looks so strange. Could you please check it?
Regards,
Uchikoshi
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Hi Experts,
I ran the Webench with below condition.
Device : LM60430A
Vin : 24V
Vout : 5.15V
Iout : 3A
Tj on Webench shows that Tj becomes 133.61 degC at 30 deg C room temp.
It looks so strange. Could you please check it?
Regards,
Uchikoshi
HI Uchikoshi:
based on power dissipation and temperature raise, it theta JA is around 41.7deg C/W , a little bit higher than apps note indicated which is 33deg C/W, but the temperature will over 100deg C.
you can refer below:
Thanks
Hi Daniel,
This simulation result shows that IC power loss is 2.59W while that for LM60430D shows that IC loss is 1W with the same condition.
Could you please confirm it by running Webench by yourself?
Regards,
Uchikoshi
Hi Uchikoshi:
I will check with wenbench team about it. cause from datasheet, the efficiency should be 92% at this condition. and I will loop you in the email.
is that OK?
customer can use 33deg C/W with datasheet 5V efficiency curve for its junction temperature esimation.
Thanks