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LT8309 - Secondary-Side Synchronous Rectifier Driver

Description

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.

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 n SOT-23 5-Lead Package.

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Full PDF Text Transcription

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LT8309 Secondary-Side Synchronous Rectifier Driver 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 n SOT-23 5-Lead Package Applications n High Output Current Flybacks n High Efficiency Flybacks Description 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.
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