Power op-amp for high-current loads
The OPA544FKTTT is a power operational amplifier from Texas Instruments, delivering 2 A continuous output per channel from a single 20 V to 70 V supply rail. The 8 V/µs slew rate and 1.4 MHz gain-bandwidth product mean it drives inductive or capacitive loads — motors, voice coils, or actuator windings — without the slew-induced distortion that limits slower amplifiers in servo loops.
What the supply range and output current mean for your BOM
The 20 V minimum supply span means the OPA544FKTTT cannot run from a single 12 V or 15 V rail — it needs a 24 V or higher bus, typical for industrial actuator drives or bench power supplies. The 70 V maximum covers 48 V telecom rails and 60 V automotive transient-tolerant buses with margin. A 1 oz copper pour of at least 2 in² under the tab is a safe starting point for full-rated output.