Transcript Document

AUIR2085S Self-oscillating Halfbridge Driver
The AUIR2085S is a rugged, general purpose high speed selfoscillating half bridge driver which was specifically designed,
tested and qualified for use in harsh environments such as
automotive under-the-hood applications. Proprietary HVIC
technology enables ruggedized monolithic construction and an
industry benchmarking negative voltage spike immunity for fail
proof operation even under extreme switching conditions and
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short circuit events.
Features
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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 and half-bridge driver
IC in a single SO-8 package
Programmable switching frequency with up to 500 kHz
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 over-current protection
Under-voltage lockout and internal soft start
Lead-free, RoHS compliant
Automotive qualified
Advantages
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The AUIR2085S is a self oscillating half-bridge driver IC with 50% duty cycle
ideally suited for 36V-75V.
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The AUIR2085S initiates a soft start at power up and after every over-current
condition. Under-voltage lockout prevents operation if VCC is less than 7.5V.
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The IC is qualified according to AEC-Q100 standards and features an
environmentally friendly, lead-free and RoHS compliant bill of material and are
part of International Rectifier’s Zero-Defect initiative.
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The AUIR2085S is set up to be in line with typical change management
requirements of the automotive market.