* Qualification standards can be found on IR’s web site www.irf.com © 2014 International Rectifier
Sept 26, 2014
Automotive Grade
AUIR2085S
HIGH SPEED, 100V, SELF OSCILLATING 50%
DUTY CYCLE, HALF-BRIDGE DRIVER
Features
Simple primary side control solution to enable half-
bridge DC-Bus Converters for 48V distributed systems
with reduced component count and board space
Integrated 50% duty cycle oscillator & half-bridge driver
IC in a single SO-8 package
Programmable switching frequency with up to 500kHz
max per channel
+/- 1A drive current capability optimized for low charge
MOSFETs
Adjustable dead-time 50ns – 200ns
Floating channel designed for bootstrap operation up to
+100Vdc
High and low side pulse width matching to +/- 25ns
Adjustable overcurrent protection
Undervoltage lockout and internal soft start
Leadfree, RoHS compliant
Automotive qualified*
Typical Applications
DC-DC Converters
HEV Auxiliary Converter
Battery Management Converters
Product Summary
Topology Half-Bridge
V
OFFSET
≤ 100 V
I
o+
& I
o-
(typical) 1.0A & 1.0A
f
OSC
(max) 500kHz
Deadtime 50ns – 200ns
HO/LO Pulse Matching +/- 25ns
Package Options
8 - Lead SOIC
AUIR2085S
Typical Connection Diagram
V
BIAS
( 10 V – 15 V)
V
CC
D
BOOT
C
BOOT
CBIAS
RT
C
T
OSC
C
S
HO
V
S
LO
V
B
VIN (100 V max)
S1
S2
L
C
RV
O
+
AUIRS2085
COM
