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OPA192: The current of supply power of OPA192

user6354633
Prodigy 20 points
Part Number: OPA192

The  output current of TPS7A4901/TPS7A300A is 150mA.

Use TPS7A4901/TPS7A3001 to supply the ±12V , the current is enough  to driver 3 OPA192 or not?

Thanks!

  • 0
    TI__Guru 70561 points

    Hi ,

    Please provide us with the following information.:

    1. What are the loads at OPA192-1, OPA192-2 and OPA192-3?  --> you should calculate the max. power consumed at OPA192-1, OPA192-2 and OPA192-3.

    2. Are there going to be potential shorts at OPA192-1, 2, 3 op amp? OPA192's short-circuit current is rated at +/-65mA. 

    3. What are temperature operating ranges for the worst case scenario?

    4. Are there any transient conditions that can be found in the operating conditions?

    5. What are driving waveforms at OPA192-1, 2 & 3?

    The input power at +/-15V = ouptut power at +/-12V + heat dissipation = output power of OPA192-1 + OPA192-2 + OPA193-3 + dissiplations, which are the minimum power requirements. Of course, you need to add power overhead for operating temperature considerations + Transient conditions + perhaps short circuit conditions etc..  You have to take into account all worst case scenarios before you can answer the questions. 

    Best,

    Raymond

  • 0
    TI__Genius 10850 points

    Hi, 

    We haven't heard from you in a while. We hope the issue was resolved. I am going to close this thread. Please reply to reopen if you have any additional questions / information.