ADVANCE INFORMATION

Data Sheet No. PD60176-C

IR2172

Block Diagram

Packages

Product Summary

600Vmax

1mA

Vin

+/-260mVmax

Gain temp.drift

20ppm/

fo

40kHz (typ.)

Overcurrent trip

1.5usec (typ)

signal delay

Overcurrent trip level

+/-260mV (typ.)

LINEAR CURRENT SENSING IC

16 Lead SOIC

(wide body)

8 Lead PDIP

8 Lead SOIC

VB

V+

V-

VS

VCC

PO

COM

IR2172

GND

15V

To Motor Phase

PWM Output

Up to 600V

OC

Overcurrent

Features

condition

Description

IR2172 is the monolithic current sensing IC designed

for motor drive applications. It senses the motor phase

current through an external shunt resistor, converts from

analog to digital signal, and transfers the signal to the

low side. IR’s proprietary high voltage isolation technol-

ogy is implemented to enable the high bandwidth signal

processing. The output format is discrete PWM to elimi-

nate need for the A/D input interface. The dedicated

overcurrent trip (OC) signal facilitates IGBT short cir-

cuit protection. The OC output pulse can be programmed

by the external resistor and capacitor. The open-drain

outputs make easy for any interface from 3.3V to 15V.