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 µA 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