IR21771S

Data Sheet No. PD60234 revB IR22771S/IR21771S(PbF) Phase Current Sensor IC for AC motor control Features Floating channel up to 600V for IR21771 and 1200V for IR22771 Product Summary VOFFSET (max) Vin range Bootstrap supply range Floating channel quiescent current (max) Sensing latency (max) Throughput Over Current threshold (max) IR22771 IR21771 1200 V 600V ±250mV 8-20 V 2.2 mA 7.5 µsec (@20kHz) 40ksample/sec (@20kHz) ±470 mV Synchronous sampling measurement system High PWM noise (ripple) rejection capability www.DataSheet4U.com Digital PWM output Fast Over Current detection Suitable for bootstrap power supplies Low sensing latency (<7.5 µsec @20kHz) Description IR21771/IR22771 is a high voltage, high speed, single phase current sensor interface for AC motor drive applications. The current is sensed by an external shunt resistor. The IC converts the analog voltage into a time interval through a precise circuit that also performs a very good ripple rejection showing small group delay. The time interval is level shifted and given to the output. The max throughput is 40 ksample/sec suitable for up to 20 kHz asymmetrical PWM modulation and max delay is <7.5µsec (@20kHz). Also a fast over current signal is provided for IGBT protection. Package Typical Connection (Please refer to Lead Assignments for correct pin configuration. This diagram shows electrical connections only) 1 www.irf.com IR22771S/IR21771S(PbF) Absolute Maximum Ratings Absolute Maximum Rating...