March 29, 2011
Automotive Grade
AUIR2085S
HIGH SPEED, 100V, SELF OSCILLATING 50%
DUTY CYCLE, HALF-BRIDGE DRIVER
Features
Product Summary
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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
Topology
V OFFSET
I o+ & I o- (typical)
f OSC (max)
Deadtime
HO/LO Pulse Matching
Half-Bridge
≤ 100 V
1.0A & 1.0A
500kHz
50ns – 200ns
+/- 25ns
+100Vdc
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High and low side pulse width matching to +/- 25ns
Adjustable overcurrent protection
Undervoltage lockout and internal soft start
Leadfree, RoHS compliant
Automotive qualified*
Package Options
Typical Applications
? DC-DC Converters
? HEV Auxiliary Converter
8 - Lead SOIC
AUIR2085S
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Battery Management Converters
Typical Connection Diagram
V BIAS ( 10 V – 15 V)
D BOOT
V B
C BOOT
V IN ( 100 V max)
R T
V CC
OSC
HO
V S
S1
L
C
+
R
V O
C BIAS
C T
C S
COM
LO
S2
* Qualification standards can be found on IR’s web site www.irf.com
? 2008 International Rectifier
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