TI E2E Community
TPS3106 - Tj and thetaja
Could you please help me to get the Max allowed Junction Temperature and the Theta Ja value for the P/N TPS3106K33DBVR.
When i send a mail to "firstname.lastname@example.org", they had directed me to post in the Forum..Kindly help me in getting these values..
For a SOT23-6 a typical value for Theta JA of a sot23-6 on a 2 layer Jedec board will be ~ 240 C/W and ~180C/W on a 4 layer jedec board.
This matches pretty well with the maximum power dissipation table listed in the datasheet, which you should follow.
If you want more information on how to use various thermal metrics.
Got to www.ti.com/thermal
or read my application note.
Please read the ground rules post at the top of this SVS forum for guidelines for titling your posts.
This IC specifies a maximum allowed ambient temperature. Since the device draws so little power (uA), the ambient temperature is assumed to be the junction temperature.
Also, since it draws so little power, the theta JA value is useless in an application. The temperature rise is insignificant. But the theta JA is actually the inverse of the derating factor on page 3.
Thank you for the information.
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