Current Sensing ICs

Motor Control Current Sensing ICs
The IR217x/IR227x is a family of monolithic current sensing ICs designed for motor drive applications.  The ICs sense the motor phase current through an external shunt resistor, converts the current information from an analog to a digital signal, and transfers the signal to the low voltage circuitry. IR's proprietary high voltage isolation technology is implemented to enable the high bandwidth signal processing. The output format is either a discrete PWM to be used when A/D interface is not available or an accurate analog signal linked to an external voltage reference to simplify signal conditioning in A/D equipped applications. The dedicated over current trip signal facilitates IGBT short circuit and over current protection. The open- drain digital outputs of the IR2175, IR2177, IR2277, IR21771, and IR22771 make it easy for any interface from 3.3V to 15V. The self-adaptable analog output of the IR2177 and IR2277 make it easy to interface AD converter with any input range from 3V to 12.5V.

IR’s iMOTION Integrated Design Platform delivers everything you need to design a complete variable speed motor control subsystem. From the front panel and power entry to the motor terminals, iMOTION brings powerful digital, analog and power silicon together with algorithms, development software and design tools.

Features
Floating channel up to +1200V
Monolithic integration
Linear current feedback through shunt resistor
Direct digital PWM output for easy interface
Direct analog output for easy interface (IR2177 and IR2277 only)
Independent fast over current trip signal
High common mode noise immunity
Input over voltage protection for IGBT short circuit condition
Open drain outputs

Part Number Package Offset Voltage PbF Analog Output Digital Output Overcurrent Output VIN Range Duty Cycle VCC Range
Min Max
IR2171 8-Lead PDIP 600V No No Yes No ±260mV 7% 93% 9.5-20V
IR2171S 8-Lead SOIC
IR2172 8-Lead PDIP 600V No No Yes Yes ±260mV 7% 93% 9.5-20V
IR2172S 8-Lead SOIC
IR2175 8-Lead PDIP 600V Yes No Yes Yes ±260mV 7% 93% 9.5-20V
IR2175S 8-Lead SOIC
IR2177S 16-Lead SOIC 600V Yes Yes Yes Yes ±250mV 10% 30% 8-20V
IR21771S 16-Lead SOIC 600V Yes No Yes Yes ±250mV 10% 30% 8-20V
IR2277S 16-Lead SOIC 1200V Yes Yes Yes Yes ±250mV 10% 30% 8-20V
IR22771S 16-Lead SOIC 1200V Yes No Yes Yes ±250mV 10% 30% 8-20V

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