IR2277S

Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to VSS, all currents are defined positive into any lead. The Thermal Resistance and Power Dissipation ratings are measured under board mounted and still air conditions.

IR2277S 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 both as a PWM signal (PO) and analog voltage (OUT). The analog voltage of the IR2277S is proportional to the measured current and is ratio metric with respect to an externally provided voltage reference. The max throughput is 40 ksample/sec suitable for up to 20 kHz asymmetrical PWM modulation and max delay is <7.5 sec (@20kHz). Also a fast over current signal is provided for IGBT protection.