OPA2210: evaluate the power consumption under short circuit condition.

Hi user5988235,

user5988235 said:

does this mean the total power consumption is 18*(0.058+0.00325) *2=2.2W?   

I calculated the power dissipation at approx. 1.1W at room temperature. It is only referenced to one op amp shorted at a time, see datasheet capture below. 

user5988235 said:

if this is right, the temperature rise will be OVER 150℃, how is this possible?

OPA2210 is BJT topology design. In the Si design, the designer must implemented the current limiting features vs. Tj, which is shown in the attached Figure 6-29 above. The collector and emitter in BJT has negative temperature coefficient, so the short-circuit current should increase as Tj's temperature increases. The Figure 6-29 is shown the opposite trend. 

Please keep in mind that the continuous short-circuit current is a specification to protect the Si Die thermally. This is thermal protection feature, so the IC will not damage itself under the thermal stress conditions.  However, tt is not operating specification. 

user5988235 said:

-the power supply will be stable during the short circuit of OPA.

The power supply will be stable, if the power rails are rated for sinking the amount of Isc current at a given temperature.