Texas Instruments' UCC24612 are high-performance synchronous rectifier controllers and drivers for standard and logic-level N-channel MOSFET power devices. By implementing a near-ideal diode emulation UCC24612 reduce losses of the output rectifier and indirectly the primary side losses. The drain to source (V_DS) sensing control scheme allows UCC24612 to work with multiple topologies, such as active clamp flyback, QR/DCM/CCM flyback, LLC, and others.

Integrated features simplify the design effort, enabling the UCC24612 to excel in a variety of applications and frequencies. The wide operating V_DD and V_D voltage ranges enable simple implementation in systems with outputs up to 28 V. Efficiency and noise immunity are enhanced with adaptive minimum off-time. Variants UCC24612-1 and UCC24612-2 offer different minimum on-times to provide additional noise immunity. Robust operation in continuous conduction mode (CCM) is further enhanced with proportional gate-drive and CCM cycle limit pre-turn-off.

The UCC24612 have multiple features that improve efficiency. The fast comparator with short propagation delays reduces switching loss. The 9.5 V gate drive clamp reduces MOSFET driving losses. Frequency-dependent standby modes further decreases standby power. These features help the UCC24612 be part of a greater system that meets stringent efficiency standards such as Department of Energy (DoE) Level VI and Code of Conduct (CoC) Tier 2.

The UCC24612 are available in a SOT23-5 package.