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参数资料
| 型号： | IRAUDPS1 |
| 厂商： | International Rectifier |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC MOSFET DRIVER |
| 标准包装： | 1 |
| 系列： | * |
Data Sheet No. PD60206 Rev.D
IR2085S & (PbF)
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
+100Vdc
High and low side pulse width matching to +/- 25ns
Adjustable overcurrent protection
Undervoltage lockout and internal soft start
Also available Leadfree
Topology
V OFFSET
I o+ & I o- (typical)
f OSC (max)
Deadtime
HO/LO Pulse
Matching
Package
Half-Bridge
≤ 100 V
1.0A & 1.0A
500kHz
50ns – 200ns
+/- 25ns
8 - Lead SOIC
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.
Each channel frequency is equal to f OSC, which can be set by selecting R T & C T, where f OSC = 1/(2*R T .C T ).
Dead-time can be controlled through proper selection of C T and can range from 50ns to 200ns. Internal
soft-start increases the pulse width during 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 V CC is less than 7.5V.
Typical Connection Diagram
www.irf.com
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