The Texas Instruments UCC28C58DR is a current-mode PWM controller built on a low-power BiCMOS process, rated for a 30-V supply rail. It handles step-up, step-down, and step-up/step-down topologies — boost, buck, flyback, forward, and SEPIC — all from a single controller. That topology flexibility means one line item can serve multiple power-stage designs in a facility, consolidating the BOM across different output voltages and isolation requirements. Output is a single transistor driver, positive configuration, with a 100% maximum duty cycle. The 100% duty capability is what lets a buck or forward converter run at very low dropout — useful when the input rail sags close to the regulated output and you need to keep the load alive without losing regulation. Control features include current limit, dead-time control, frequency control, and soft start. Clock sync is built in, so multiple UCC28C58DR units can run from a common timing reference — that cuts beat-frequency ripple and simplifies EMI filtering in multi-phase or paralleled supplies.
Supply rail and synchronous rectification
Supply voltage range is 12.5 V to 28 V on Vcc. The built-in synchronous rectifier driver improves efficiency in low-voltage outputs.
ROHS3 compliance is confirmed, so it passes the standard EU material restrictions without an exemption.