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| IR2171 Datasheet, PDF (1/7 Pages) International Rectifier – LINEAR CURRENT SENSING IC | |||
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ADVANCE INFORMATION Data Sheet No. PD60175-C
IR2171
LINEAR CURRENT SENSING IC
Features
⢠Floating channel up to +600V
⢠Monolithic integration
⢠Linear current feedback through shunt resistor
⢠Direct digital PWM output for easy interface
⢠Low IQBS allows the boot strap power supply
⢠High Common Mode Noise Immunity
⢠Input overvoltage Protection for IGBT short circuit
condition
⢠Open Drain output
Product Summary
VOFFSET
600V
IQBS
Vin
Gain temp. drift
1mA
+/-260mVmax
20ppm/oC(typ.)
fo
40kHz (typ.)
Descriptions
IR2171 is the linear current sensing IC designed for
motor drive applications. It senses the motor phase
current through an extenal shunt resistor, converts
from analog to digital signal, and transfers the signal
to the low side. IRâs proprietary high voltage isolation
technology is implemented to enable the high band-
width signal processing. The output format is discrete
PWM at 40kHz to eliminate need for the A/D input
interface. It allows direct interface to uP via simple
counter based measurement. The independently pow-
ered output enables easy interface to the opto cou-
pler device for galvanic isolation if needed.
Packages
8 Lead SOIC
8 Lead PDIP
16 Lead SOIC
(wide body)
Block Diagram
15V
PWM Output
GND
VCC
V+
PO
V-
IR2171
COM
VB
NC
VS
Up to 600V
To Motor Phase
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