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
|
