PWM controller for boost, flyback, and forward converters
The Texas Instruments UCC2806DWTR is a current-mode PWM controller that handles step-up and step-up/step-down topologies—boost, flyback, and forward converter—from a single 8 V to 14.5 V supply rail. It drives two transistor outputs at a fixed 47 kHz switching frequency, with a maximum duty cycle of 50%. The controller includes current limit, enable, and frequency control, plus a synchronous rectifier driver. It comes in a 16-SOIC surface-mount package and is rated for -40°C to 85°C ambient operation.
47 kHz switching and 50% duty cycle—what they mean for the transformer
The 47 kHz switching frequency and 50% duty-cycle cap are fixed limits. The duty-cycle cap ensures the transformer resets fully each cycle in a flyback.
Active production, no LTB risk
This part is listed as Active with ROHS3 compliance. There is no last-time-buy or end-of-life notice. The UCC2806DWTR can be specified into new designs without concern for sudden discontinuation. For sourcing, we quote to order against an RFQ—availability and current pricing are confirmed at quote time through our independent distribution network.
