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OPA593: OPA593

Cezar Morun1
Intellectual 315 points
Part Number: OPA593


Tool/software:

Hi,

I am using an OPA593 as a buffer (unity gain).

The op.amp. is not oscillating. , however I observed a high current consumption (more than 50mA from 60V) even with the input connected to GND.

Any idea why?

  • 0
    TI__Mastermind 22322 points

    Hello Cezar, 

    Could you please post a schematic? If not, please specify what type of loads are connected to the output and the power supplies? Is it 60V single-supply or dual-supply (±30V or some variation that adds to a voltage differential of 60V)?

    Here is what is expected: 

    At the following conditions: 

    All the best,
    Carolina 

  • 0 in reply to Caro Walter
    Intellectual 315 points

    It is a single 60V and no output load.

    I know that it is away more than expected.

    I can share the schematics, but not in a public forum. Can you share somehow your ti.com email address?

  • 0 in reply to Cezar Morun1
    TI__Genius 15716 points

    Hey Cezar, 

    This is abnormal for the OPA593.

    I am working with a TI FAE on this problem you are seeing. Sachith (TI FAE)  shared the current schematic with me.

    Can you tell me the output voltage of the buffer when you are connecting the IN+ to GND? 

    When you measure the 50mA, is this with U4 removed, or with U4?

    Thanks,

    Jacob