Increasing current with constant voltage

simulate this circuit – Schematic created using CircuitLab

I got a sine wave from an STM32 DAC.

Its voltage is 2.64 V. I wanted to amplify it. I used this schematic. Its gain is 4.3. I got 11.20V output of the op amp but the output current is 0.13 mA. I decided to drive a transformer with the output of op amp but the power is too low to do it.

Do you have an idea?

Some people say it is not possible to increase current with constant voltage but I don't know if that's true or not.

• What current do you require? At what voltage and frequency? 'Some people say' - now that's just speculation. Let's try to stick with facts. Apr 5, 2021 at 11:54
• @Kartman I need 1 A at 11.20 V and 29 khz. My sine wave's frequency is 29khz. Apr 5, 2021 at 11:59
• Have a look at the TL084's datasheet. What does it say about maximum output current and minimum load? Apr 5, 2021 at 12:00
• for 1 A output current you will need two big transistors on the opamp output to build an additional class AB output stage. Or maybe there is an integrated class D stage available that can be run off an analog input voltage. Apr 5, 2021 at 12:01
• An audio amp of > 12W might do the trick although 29kHz is at the upper end of the audio range. What is the load you want to drive? Apr 5, 2021 at 12:24