IR3087MPBF datasheet(1/35 Pages) IRF

tên linh kiện	IR3087MPBF

Giải thích chi tiết về linh kiện	XPHASETM PHASE IC WITH OPTI-PHASETM, OVP, AND OVERTEMP DETECT

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nhà sản xuất	IRF [International Rectifier]

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IR3087

PBF

DATA SHEET

XPHASETM PHASE IC WITH OPTI-PHASETM, OVP, AND OVERTEMP DETECT

DESCRIPTION

The IR3087 Phase IC combined with an IR XPhase

TM Control IC provides a full featured and flexible way to

implement power solutions for the latest high performance CPUs and ASICs. The “Control” IC provides

overall system control and interfaces with any number of “Phase” ICs which each drive and monitor a single

phase of a multiphase converter. The XPhase

TM architecture results in a power supply that is smaller, less

expensive, and easier to design while providing higher efficiency than conventional approaches.

The IR3087 with Opti-Phase

TM is intended for applications demanding increased efficiency under medium to

light load conditions. Both gate drivers will drive low at a programmable output current threshold. This

effectively disconnects the phase from the load eliminating power losses due to switching and circulating

currents.

FEATURES

•

2.5A Average Gate Drive Current

•

Loss-Less Inductor Current Sense

•

Internal Inductor DCR Temperature Compensation

•

Programmable Phase Delay

•

Programmable Feed-Forward Voltage Mode PWM Ramp

•

Sub 100ns Minimum Pulse Width supports 1MHz per-phase operation

•

Current Sense Amplifier drives a single wire Average Current Share Bus

•

Current Share Amplifier reduces PWM Ramp slope to ensure sharing between phases

•

Body Braking

TM disables Synchronous MOSFET for improved transient response and prevents negative

output voltage at converter turn-off

•

Opti-Phase

TM reduces the number of phases for improved light to medium load efficiency

•

OVP comparator with 150ns response

•

Programmable Phase Over-Temperature Detection

•

Small thermally enhanced 20L MLPQ package

APPLICATION CIRCUIT

RCS+

CCS-

CVCC

L

CVCCL

CSCOMP

20k

RBIASIN

DBST

CCS+

RVCC

RPWMRMP

CIN

RCS-

CBST

VO

RAMP

BIAS

DAC

VRHOT

EA

ISHARE

12V

CO

VGATE

5 Wire Analog Bus

From Control IC

RMPIN+

1

RMPIN-

2

GATEH

14

VCCH

15

HOTSET

3

VRHOT

4

PGND

13

GATEL

12

ISHARE

5

VCCL

11

IR3087

PHASE

IC

ROP1

ROP2

Page 1 of 35

1/31/05

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More results

Mô tả tương tự - IR3087MPBF

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