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Original question:

REF102: REF102

REF102: REF102 maximum power dessipation

Aosker Liu
Prodigy 520 points
Part Number: REF102
Other Parts Discussed in Thread: REF5010, OPA227

Hi team 

Good day!

My customer want to know :

REF102 maximum power dissipation

OPA227U maximum power dissipation

could you please help this？

Thank you so much!

Regards

Aosker

  • 0
    TI__Mastermind 19450 points

    Hi Aosker,

    I need to request the thermal information for the REF102 for this request. This will take 2-3 weeks.

    What is the exact OPN you are looking for?

    Is there a reason your customer is using the REF102 instead of the REF5010? The REF5010 is better in almost every way.

    Can you make a separate thread for the OPA question? Threads can only be attached to one PL at a time.

  • 0
    TI__Guru 62580 points

    Aosker,

    The OPA227 maximum power dissipation is a function of the supply voltage, output current and output voltage - please watch following training material covering topic of power and temperature:  

    The worse-case would occur when the OPA227 is powered from Vdd 36V total supply voltage and its output is shorted to one of its rails.  Under such condition the maximum power dissipation inside the package would be: P = Ishort_circuit*Vdd = 45mA*36V = 1.62W.  

    This, however, in case of U package would increase the OPA227 junction temperature much above the ambient:

    delta_T = 1.62W*110.1C/W = 178.4C, most likely violating the OPA227 absolute maximum rated junction temperature of 150C.