www.irf.com © 2009 International Rectifier
September 26, 2011
IR1168S
DUAL SMART RECTIFIER DRIVER IC
Features
• Secondary-side high speed controller for
synchronous rectification in resonant half bridge
topologies
• 200V proprietary IC technology
• Max 500KHz switching frequency
• Anti-bounce logic and UVLO protection
• 4A peak turn off drive current
• Micropower start-up & ultra low quiescent current
• 10.7V gate drive clamp
• 70ns turn-off propagation delay
• Wide Vcc operating range
• Direct sensing for both Synchronous Rectifiers
• Minimal component count
• Simple design
• Lead-free
Typical Applications
• LCD & PDP TV, Telecom SMPS, AC-DC adapters
Product Summary
Topology LLC Half-bridge
VD 200V
V
OUT
10.7V Clamped
I
o+
& I
o-
(typical) +1A & -4A
Turn on Propagation Delay 60ns (typical)
Turn off Propagation Delay 70ns (typical)
Package Options
8-Lead SOIC
Typical Connection Diagram
LOAD
SR1
SR2
Cdc
1 2
Lr
C1
C2
Rtn
Vin
VD2
5
VS2
6
VS1
3
VCC
2
VD1
4
GND
7
GATE2
8
GATE1
1
IR1168
Cout
Rg2
Rg1
M1
M2
IR1168
