Multi-topology PWM controller for isolated and non-isolated designs
The MAX5094BASA+T is a current-mode PWM controller from Analog Devices that handles step-up/step-down regulation across flyback and forward converter topologies — one part number covers both isolated and non-isolated power stages, which simplifies BOM consolidation when a design spans multiple rail configurations.
What the ratings mean for the BOM line
The 49.8 % maximum duty cycle is a deliberate ceiling for forward converters — it guarantees the reset winding has time to demagnetise the core before the next cycle, preventing saturation. In a flyback, the same limit means the off-time is always long enough to transfer the stored energy to the secondary side. A single transistor-driver output with positive, isolation-capable configuration means the controller drives an external MOSFET on the primary side; the secondary-side regulation loop closes through an optocoupler or a transformer-coupled winding. No synchronous rectifier drive is built in, so the secondary uses a diode — fine for sub-50 W designs where the efficiency gain of a synchronous FET does not justify the added gate-drive complexity.
Surface-mount assembly with standard SOIC-8 solder profile; the Tape & Reel packaging (TR) is the production-friendly option for pick-and-place, while the Cut Tape (CT) suits prototype or low-volume builds.
ROHS3 compliant, with no lead or restricted substances in the package finish.