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Original question:
Hi team
Good day!
Our customer want to know :
OPA227U maximum power dessipation
could you please help this？
Thank you so much!
Regards
Aosker
Hi Aosker,
Q: OPA227U maximum power dissipation
Without the actual schematic, I will estimate the max. DC power dissipation (also depending on the IC packages, Voltage rails and Tamb operating temperature etc.). For AC power dissipation, you have to derive the average power of the op amp.
If I use output short-circuit figure (continuous per amp) at 45mA, then the max. power dissipation is approx. (45+8.4mA)*15 = 0.80W --> with this figure, the op amp's junction temperature is approx 110.1C/W*0.80 + 25C = 113C (continuous operation).
If I use junction to ambient thermal resistance as reference, which is 110.1 C/W at 25C, then 25C + Pwr_dissipation*110.1C/W < 150C, where max. Power-dissipation is 1.14W (this power figure is unsustainable for continuous operation).
So my estimation in DC max. power dissipation is approx. 1W for D (SOIC) package.
If you have additional questions, please let me know.
Enclose is the video about the topic, if you want to dig in for more details.
Best,
Raymond
