DescriptionThe 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

Manufacturer	STMicroelectronics
Product Category	AC DC Converters, Offline Switchers
Series	SRK2000A
Packaging	Alternate Packaging
Package-Case	8-SOIC (0.154", 3.90mm Width)
Operating-Temperature	-40°C ~ 150°C (TJ)
Mounting-Type	Surface Mount
Supplier-Device-Package	8-SO
Watt	-
Output-Isolation	Non-Isolated
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Half-Bridge
Voltage-Start-Up	-
Voltage-Supply-Vcc-Vdd	4.5 V ~ 32 V
Duty-Cycle	60%
Frequency-Switching	Up to 500kHz
Fault-Protection	-
Control-Features	-