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Description

The SRK2000A smart driver implements a control scheme specific to secondary side synchronous rectification in LLC resonant converters that use a transformer with center tap secondary winding for full wave rectification.

It provides two high current gate drive outputs, each capable of driving one or more N-channel Power MOSFETs. Each gate driver is controlled separately and an interlocking logic circuit prevents the two synchronous rectifier MOSFETs from conducting simultaneously.

Features

? Secondary side synchronous rectifier controller optimized for LLC resonant converters

? Protection against current reversal

? Safe management of load transient, light load and startup condition

? Matched turn-off thresholds

? Intelligent automatic sleep mode at light load

? Dual gate driver for N-channel MOSFETs with 1 A source and 3.5 A sink drive current

? Operating voltage range 4.5 to 32 V

? Programmable UVLO with hysteresis

? 250 ?A quiescent consumption

? Operating frequency up to 500 kHz

? Available in SO-8 package

Applications

? All-in-one PC

? High-power AC-DC adapters

? 80+/85+ compliant ATX SMPS

? 90+/92+ compliant server SMPS

? Industrial SMPS