The A89103 is an N-channel power MOSFET driver capable of controlling five MOSFETs to provide motor phase isolation and supply isolation in three phase BLDC applications. Three floating gate drive outputs maintain phase isolator power MOSFETs in the on-state over the full supply range with high phase-voltage and under High dv/dt on motor phase connection for 12 V and 48 V systems. Two additional floating gate drivers are provided to isolate the battery supply voltage during reverse battery or short circuit conditions.
The A89103 supports both source to source and drain to drain battery MOSFET isolation. An integrated charge pump regulator provides the above battery supply voltage necessary to maintain the power N-channel MOSFETs in the on-state continuously. The charge pump will maintain sufficient gate drive (>7.5 V) for battery voltages down to 4.5 V with 100 kΩ gate source resistors.
The five floating gate drives can be configured, monitored and controlled through the SPI interface. When not in use the A89103 can be placed into a low-power sleep mode. Undervoltage
