Hello!
As the title suggests, I need to redesign a bidirectional current source circuit, with 2.5A peak current into 0.5 ohm load. The previous design was based on a Howland current pump configuration, with an OPA547 (linear power opamp, 750mA output current). My idea was to put OPA548 (same as OPA547, but with 3A current) instead. The problem lies in the power dissipation, i want to keep it as low as possible, because i will have to put 8 of these circuits in a box.
Another idea was to use a LM3886, but that idea was discarded, due to low efficency at low power outputs.
What would you suggest?