LT8309 Datasheet (Linear) - Secondary-Side Synchronous Rectifier Driver

LT8309, Secondary-Side Synchronous Rectifier Driver

The LT®8309 is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in a flyback topology.

By replacing the diode with a N-channel MOSFET, applications are no longer restricted by the heat constraints of the output diode.

The IC replicates the behavior of a diode by

LT8309 Features

* n Works with DCM and BCM/CrCM Conduction Mode Flyback Topologies n VCC: 4.5V to 40V n Supports Up to 150V MOSFETs n 26ns Turn-Off Propagation Delay n Accurate Minimum On and Off Timers for Reliable Operation n Adjustable and Accurate Trip Point: +5mV to

* 30mV n 1Ω Gate Driver Pull-Down