The Texas Instruments UCC2808ADTR-1 is a current-mode PWM controller for offline and DC-DC isolated power supplies, supporting full-bridge, half-bridge, and push-pull topologies. Switching frequency reaches 1 MHz, which allows the use of smaller magnetic components in the power stage compared to controllers limited to 100–500 kHz. Maximum duty cycle is clamped at 49% — this prevents transformer saturation in push-pull and half-bridge designs by ensuring alternating pulses have equal volt-second balance.
Supply rails and temperature grade
Operates from a Vcc supply of 8.3 V to 15 V, with a startup threshold of 12.5 V — the undervoltage lockout hysteresis ensures clean turn-on without chatter near the threshold. This suits avionics, downhole instrumentation, and engine-bay power supplies where the ambient exceeds 85°C.
Package, footprint, and sourcing
The surface-mount footprint is standard for low-power controller ICs and routes easily on a two-layer board. The reel quantity suits automated pick-and-place assembly; cut tape is available for prototyping or low-volume builds.