IR2171

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 Product Summary VOFFSET IQBS Vin Gain temp. drift fo 600V 1mA +/-260mVmax 20ppm/oC(typ.) 40kHz (typ.) Open Drain output 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. IR’s proprietary high voltage isolation technology is implemented to enable the high bandwidth 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 powered output enables easy interface to the opto coupler 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 PO V+ V- Up to 600V IR2171 COM NC VB VS To Motor Phase IR2171 ADVANCE INFORMATION Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages r...