IRDC2085S-S International Rectifier, IRDC2085S-S Datasheet

IRDC2085S-S

Manufacturer Part Number

IRDC2085S-S

Description

BOARD EVAL CONV DC BUS W/IRF7832

Manufacturer

International Rectifier

Datasheet

1.IR2085STRPBF.pdf (8 pages)

Specifications of IRDC2085S-S

Main Purpose

DC/DC, Step Down

Outputs And Type

1, Isolated

Power - Output

200W

Voltage - Output

6 ~ 10V

Current - Output

20A

Voltage - Input

36 ~ 60V

Regulator Topology

Buck

Frequency - Switching

500kHz

Board Type

Fully Populated

Utilized Ic / Part

IR2085S, IRF7493, IRF7832

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

*IRDC2085S-S

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Download datasheet (195Kb)

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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%

DUTY CYCLE, HALF-BRIDGE DRIVER

and can range from 50ns to 200ns. Internal

is less than 7.5V.

Product Summary

Package

Topology

Deadtime

HO/LO Pulse

Matching

& C

OSC

8 - Lead SOIC

OFFSET

Data Sheet No. PD60206 Rev.D

& I

IR2085S & (PbF)

(max)

where f

(typical)

OSC

= 1/(2*R

50ns – 200ns

1.0A & 1.0A

Half-Bridge

+/- 25ns

≤ 100 V

500kHz

Related parts for IRDC2085S-S

IRDC2085S-S 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

IR2085S & (PbF) LEADFREE PART MARKING INFORMATION Part number Date code Pin 1 Identifier ? MARKING CODE P Lead Free Released Non-Lead Free Released ORDERING INFORMATION PKG PART DESIG NUMBER PART NUMBER S IR2085S S IR2085STR IR2085STRPbF This product has ...

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