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IR2085S PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 IR2085S
部品説明 HIGH SPEED/ 100V/ SELF OSCILLATING 50% DUTY CYCLE/ HALF-BRIDGE DRIVER
メーカ International Rectifier
ロゴ International Rectifier ロゴ 



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IR2085S Datasheet, IR2085S PDF,ピン配置, 機能
Data Sheet No. PD60206 Rev.C
IR2085S &(PbF)
HIGH SPEED, 100V, SELF OSCILLATING 50% DUTY CYCLE,
Features
HALF-BRIDGE DRIVER
Simple primary side control solution to enable half-bridge
Product Summary
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
VCC (max)
Voffset(max)
High/low side
25V
100Vdc
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
Description
output freq (fosc)
500kHz
Output Current (IO)
+/-1.0A(typ.)
High/low side pulse
width matching
+/- 25ns
Package
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.
Each channel frequency is equal to fosc, where fosc can be set by selecting RT & CT,
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
S O -8
power up and maintains pulse width matching for the high and low outputs throughout the start up cycle. The
IR2085S initiates a soft start at power up and after every overcurrent condition. Undervoltage lockout prevents
operation if VCC is less than 7.5Vdc.
Simplified Circuit Diagram
Vbias (10-15V)
D BOOT
C BOOT
Vin ( 100V max)
RT
CT
C BIAS
Vb
Vcc HO
OSC
Vs
Cs LO
GND
S1
S2
C2
C1
S R1
L
C R Vo
S R2
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