This UCC24612 multi-mode synchronous rectifier controller is a high-performance
controller and driver for standard and logic-level N-channel MOSFET power devices used for
secondary-side synchronous rectification in high current and high efficiency designs.
The combination of controller and MOSFET emulates a near-ideal diode rectifier. This
solution not only directly reduces power dissipation of the rectifier but also indirectly reduces
primary-side losses as well, due to compounding of efficiency gains.
Using drain-to-source voltage sensing, the UCC24612 is ideal for Active Clamp Flyback,
QR/DCM/CCM Flyback and LLC-resonant power supplies but can also be used with other power
architectures. The proportion drive together with the CCM cycle limit pre-turn off design make part
operate more robust in CCM operations. The wide VDD voltage range allow UCC24612 to support up to
24-V applications. The 9.5-V gate driver clamping level allows the minimum driving loss.
UCC24612 uses adaptive off time control to improve the noise immunity. This greatly
simplifies the design effort and allows the controller be used in wide application and frequency
This device is available with SOT23-5 package.
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