DESCRIPTION

· IR2171/IR2172 are monolithic current sensing ICs designed for motor drive applications.

· They sense motor phase current via an external shunt resistor, convert analog to digital signals, and transfer signals to the low side.

· Utilize proprietary high voltage isolation technology for high bandwidth signal processing.

· Output format is discrete PWM, eliminating the need for A/D input interface in IR2172.

· Open-drain outputs facilitate easy interfacing from 3.3V to 15V.

FEATURES

· Floating channel up to +600V.

· Monolithic integration.

· Linear current feedback through shunt resistor.

· Direct digital PWM output for easy interface.

· Low IQBS allows for boot strap power supply.

· Independent fast overcurrent trip signal.

· High common mode noise immunity.

· Input overvoltage protection for IGBT short circuit conditions.

APPLICATIONS

· Motor drive applications requiring current sensing and signal processing.

· Systems needing high voltage isolation and noise immunity.

· Applications requiring fast overcurrent trip signals for IGBT protection.

· Designs that benefit from direct digital PWM output and open-drain outputs.