OPA548: Signal Generator output amplifier

Scott Taylor21

Part Number: OPA548
Other Parts Discussed in Thread: TINA-TI

We need 0 to +/-20V at 1.5 amps rms from 30Hz to at least 5kHz. The output will be into a full wave bridge rectifier with a few hundred microfarads of capacitance. The ultimate load is an inductor (DC solenoid).

Would the OPA548 be appropriate as an amplifier on the output of a signal generator to produce out required output?

over 7 years ago

0 Tim Green1 over 7 years ago

TI__Expert 6275 points

You will need to consider power dissipation. See this collateral:

https://training.ti.com/ti-precision-labs-op-amps

4. TI Precision Labs - Op Amps: Power and Temperature

In addition consider downloading the free SPICE simulator from TI, TINA-TI at:

http://www.ti.com/tool/tina-ti

By building and simulating your circuit in TINA-TI many problems can be avoided before building it in the real world. If you have problems once the circuit is built in TINA-TI feel free to post the schematic from TINA-TI on the E2E Forum for further assistance.

0 Dennis Goeke over 7 years ago in reply to Tim Green1

TI__Genius 11135 points

Scott

We haven't heard back from you so we assume this answered your questions. If you need additional help just post another reply below.

Thanks
Dennis

0 Scott Taylor21 over 7 years ago in reply to Tim Green1

Prodigy 230 points

Since I only needed one I wasn't interested in designing it unless I had to. While looking for high current op-amps I found a demo board that was essentially ready to use. I bought one but haven't tried it yet. It uses the OPA548.

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OPA548: Signal Generator output amplifier