A89103 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - Five floating N-channel MOSFET drives - Maintains VGS with 100 kΩ gate-source resistors - Integrated charge pump controller - 4.5 to 85 V supply voltage operating range - Supports source-to-source and drain-to-drain battery MOSFET isolation - VCP and VGS undervoltage protection - 150°C ambient (165°C junction) continuous - Fully integrated diagnostics for safe motor phase and battery disconnect - Extensive programmable diagnostics - Diagnostic verification - Automotive AEC-Q100 qualified - A2-SIL™ product- device features for safety-critical system: Developed in accordance with ISO 26262 as a hardware safety element out of context with ASIL B capability for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety application note and datasheet. PACKAGES Not to scale 28-contact QFN with wettable flanks and exposed pad (suffix ET) 28-contact QFN with wettable flanks and exposed pad (suffix EV) DESCRIPTION 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 highphase voltage and high dv/dt on the motor-phase connection for 12 V and 48 V systems. Two additional floating gate drivers are provided to isolate the battery supply voltage during reversebattery 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 abovebattery-supply voltage necessary to continuously maintain the power N-channel MOSFETs in the on state. The charge pump maintains sufficient gate drive power (> 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...