I am attempting to drive a stepper motor where each phase draws 1 A at 3.5 V using a sine wave oscillator that outputs two signals 90 degrees out of phase with one another. At the outputs of this oscillator are op-amps, which put out the required 3.5Vpp signals but don’t provide much current. What is the best way to boost these signals up to the required 1A, and should I be worried about trying to implement any kind of current limiting? Thanks for any help you could provide.
The TCA0372 is a dual 1A power Op Amp with reasonable low saturation and Class AB low Idle current. This might be suitable for your use or low power VFD control but better with PWM and current sensing.
But for micro-stepper-mode they use DRV8844 dual H or Quad 1/2 H bridge FET drivers with PWM control with adjustable current limit to simulate analog Quadrature sine voltage control. Get the whole boards. Low cost.
Answered by Tony Stewart EE75 on January 6, 2022
Get help from others!