Multi-topology PWM controller for flexible power rail design
The Texas Instruments TL1451ACPWR is a PWM controller that handles step-up, step-down, and step-up/step-down conversion across buck, boost, and flyback topologies. It drives two external transistors (output type: transistor driver) from a single supply rail spanning 3.6 V to 50 V. The switching frequency is adjustable from 1 kHz to 500 kHz via an external RC network, giving you control over the inductor size versus ripple trade-off. No synchronous rectifier or clock sync on this part — it's a straightforward analog controller for non-isolated or isolated flyback designs where simplicity and wide input range matter more than efficiency at light load.