LT8309IS5#TRMPBF

LINEAR TECHNOLOGY  LT8309IS5#TRMPBF  芯片, 同步整流器驱动器, TSOT-23-5

The is a secondary-side Synchronous Rectifier Driver that replaces the output rectifier diode in a fly back 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 sensing the drain-to-source voltage to determine when the current becomes negative. The LT8309"s low minimum on- and OFF-times help improve noise immunity. The fast propagation delay of 26ns allows applications to operate in discontinuous conduction mode DCM and critical conduction mode CrCM. The gate driver features a 0.8R pull-down device for fast turn-OFFs. The 40V VCC rating allows the part to be driven from the output voltage or the rectified drain voltage of the MOSFET. A low quiescent current of 400µA maximizes efficiency at low output currents.

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Supports up to 150V MOSFETs

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26ns Turn-OFF propagation delay

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Accurate minimum ON and OFF timers for reliable operation

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1R Gate driver pull-down

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+5mV to -30mV Adjustable and accurate trip point

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Green product and no Sb/Br