SBASB13 December 2024 AMC0311S
PRODUCTION DATA
Figure 8-1 illustrates a simplified schematic of an AC inverter for a 3-phase motor drive. The AMC0x11S device is used for DC-link voltage sensing. In the power domain, the DC-link voltage is divided down to a 2V level across the bottom resistor (RSNS) of a high-impedance resistive divider. The voltage across RSNS is sensed by the AMC0x11S. The low-side gate driver supply is regulated to a 5V level to power the high-voltage side of the AMC0x11S. In the signal domain, on the opposite side of the isolation barrier, the AMC0x11S outputs a voltage proportional to the DC-link voltage.