SBAS920 October 2018 AMC1302-Q1
Isolated amplifiers are widely used in traction inverters, on-board chargers, and dc/dc converters. The input structure of the AMC1302-Q1 is optimized for use with very low-value shunt resistors in current-sensing applications.
Figure 52 shows a typical operation of the AMC1302-Q1 for current sensing in a traction inverter application. Phase current measurement is accomplished through the shunt resistors, RSHUNT (in this case, a two-pin shunt). The differential input and the high common-mode transient immunity of the AMC1302-Q1 ensure reliable and accurate operation even in high-noise environments (such as the power stage of the motor drive). The high-impedance input and wide input voltage range make the AMC1311-Q1 suitable for DC bus voltage sensing.