IR2085SPBF International Rectifier, IR2085SPBF Datasheet

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IR2085SPBF

Manufacturer Part Number
IR2085SPBF
Description
IC DRIVER HALF BRIDGE OSC 8SOIC
Manufacturer
International Rectifier
Datasheet

Specifications of IR2085SPBF

Configuration
Half Bridge
Input Type
Self Oscillating
Current - Peak
1A
Number Of Configurations
1
Number Of Outputs
2
High Side Voltage - Max (bootstrap)
100V
Voltage - Supply
10 V ~ 15 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Delay Time
-
www.irf.com
Typical Connection Diagram
Features
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
Dead-time can be controlled through proper selection of C
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
IC in a single SO-8 package
max per channel
MOSFETs
+100Vdc
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
Programmable switching frequency with up to 500kHz
+/- 1A drive current capability optimized for low charge
Adjustable dead-time 50ns – 200ns
Floating channel designed for bootstrap operation up to
High and low side pulse width matching to +/- 25ns
Adjustable overcurrent protection
Undervoltage lockout and internal soft start
Also available Leadfree
OSC,
which can be set by selecting R
HIGH SPEED, 100V, SELF OSCILLATING 50%
T
DUTY CYCLE, HALF-BRIDGE DRIVER
and can range from 50ns to 200ns. Internal
CC
is less than 7.5V.
Product Summary
Package
T
Topology
V
I
f
Deadtime
HO/LO Pulse
Matching
& C
o+
OSC
8 - Lead SOIC
OFFSET
Data Sheet No. PD60206 Rev.D
& I
IR2085S & (PbF)
T,
(max)
where f
o-
(typical)
OSC
= 1/(2*R
50ns – 200ns
1.0A & 1.0A
Half-Bridge
+/- 25ns
≤ 100 V
500kHz
T
.C
T
).
1

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IR2085SPBF Summary of contents

Page 1

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 single SO-8 package Programmable switching frequency with ...

Page 2

IR2085S & (PbF) Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage param- eters are absolute voltages referenced to COM. All currents are defined positive into any lead. The thermal ...

Page 3

Dynamic Electrical Characteristics 12V 1000 pF, and T BIAS CC BS LOAD Symbol Definition t r Turn-on rise time t f Turn-off fall time fosc Per channel output frequency tdt High/low output ...

Page 4

IR2085S & (PbF) Functional Block Diagrams VCC UVLO RT OSC OSC BLOCK CT + OVC CS - VREF (250mV) GND Lead Definitions Symbol Description V CC Logic supply GND Logic supply return Vb High side floating supply V S Floating ...

Page 5

C = 220pF C = 470pF (kohms) Fig. 1 Typical Output Frequency (-25 180 160 140 120 100 80 60 ...

Page 6

IR2085S& (PbF) Pin Descriptions Cs: The input pin to the overcurrent comparator. Exceeding the overcurrent threshold value specified in “Static Electrical Parameters” Section will terminate output pulses and start a new soft start cycle as soon as the voltage on ...

Page 7

Case outline 0.25 [.010 0.25 [.010 NOTES: 1. DIMENSIONING & TOLERANC ING PER ASME Y14.5M-1994. 2. ...

Page 8

... WORLD HEADQUARTERS: 233 Kansas Street, El Segundo, California 90245 Tel: (310) 252-7105 8 10 IRxxxxxx YWW? ?XXXX (Prod mode - 4 digit SPN code) Assembly site code Per SCOP 200-002 LEADFREE PIN COUNT IR2085SPbF 8 8 Data and specifications subject to change without notice IR logo Lot Code PARTS PARTS PER TUBE PER REEL 95 ------ ...

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