HIGH SPEED/ 100V/ SELF OSCILLATING 50% DUTY CYCLE/ HALF-BRIDGE DRIVER
Data Sheet No. PD60206 Rev.C
IR2085S & (PbF)
HIGH SPEED, 100V, SELF OSCILLATING 50% DUTY CYCLE, HALF-BRIDGE DRIVER
Feat...
Description
Data Sheet No. PD60206 Rev.C
IR2085S & (PbF)
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 50nsec – 200nsec Floating channel designed for bootstrap operation up to +100Vdc High and low side pulse width matching to +/- 25nsec Adjustable overcurrent protection Undervoltage lockout and internal soft start Also available LEAD-FREE
Product Summary
VCC (max) 25V 100Vdc Voffset(max) High/low side output freq (fosc) 500kHz Output Current (IO) +/-1.0A(typ.) High/low side pulse width matching +/- 25ns
Description
The IR2085S is a self oscillating half-bridge driver IC with 50% duty cycle ideally suited for 36V-75V half-bridge DC-bus converters. This product is also suitable for push-pull converters without restriction on input voltage.
Package
Each channel frequency is equal to fosc, where fosc can be set by selecting RT & CT, S O -8 where fosc ≈ 1/(2*RT.CT). Dead-time can be controlled through proper selection of CT and can range from 50 to 200nsec. Internal soft-start increases the pulse width during power up and maintains pulse width matching ...
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