IR2172

ADVANCE INFORMATION Data Sheet No. PD60176-C IR2172 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 Independent fast overcurrent trip signal High common mode noise immunity Input overvoltage protection for IGBT short circuit condition Product Summary VOFFSET IQBS Vin Gain temp.drift fo Overcurrent trip signal delay Overcurrent trip level 600Vmax 1mA +/-260mVmax 20ppm/oC (typ.) 40kHz (typ.) 1.5usec (typ) +/-260mV (typ.) Open Drain outputs 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 technology is implemented to enable the high bandwidth signal processing. The output format is discrete PWM to eliminate need for the A/D input interface. The dedicated overcurrent trip (OC) signal facilitates IGBT short circuit 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. Packages 8 Lead SOIC 8 Lead PDIP 16 Lead SOIC (wide body) Block Diagram 15V PWM Output GND Overcurrent VCC PO V+ V- Up to 600V IR2172 COM OC VB VS To Motor Phase IR2172 ADVANCE ...