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Part Number: OPA2140
I am using OPA2140 (SOIC) in my design. In one of the positions it supplies a fairly high current (up to 9mArms) and power supplies are +/-15V i.e. 30V rail to rail. I calculated the power on the IC as ~200mW in my circuit.
Problem is I do not know how to use the thermal information on the data sheet, reproduced below, to estimate the junction temperature, even after reading the application report mentioned there.
So... How may I estimate the junction temperature for a 55°C ambient temperature? I guess it also depends on the layout, so what is the recommended layout, how much copper etc. to achieve a safe junction temperature. By the way, what would be a safe worst case Tj?
Thanks in advance.
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