A89503 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - Half-bridge MOSFET driver - Bootstrap gate drive for N-channel MOSFET bridge - Independent control of high-side and low-side gate drives with cross-conduction capability - Charge pump regulator for low supply voltage operation - 5.5 to 80 V supply voltage operating range - Integrated logic I/O supply - SPI-patible serial interface - Bridge control by direct logic inputs or serial interface - Programmable gate drive - Current sense amplifier - Programmable diagnostics - A2SIL™ product- device features for safety-critical systems - - AEC-Q100 Grade 0 qualified PACKAGE: 24-lead TSSOP with exposed pad (suffix LP) Not to scale DESCRIPTION The A89503 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a half-bridge arrangement and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors, BLDC motors, VR/SR motors, solenoids, and actuators. A unique charge pump regulator provides full gate drive over the full supply voltage range from 5.5 to 80 V for most applications. A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs. Each MOSFET can be independently controlled by logic-level inputs or through the SPI-patible serial interface. Fully independent control allows both external FETs to be turned on at the same time. Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most short circuit conditions. In addition to providing full access to the bridge control, the serial interface is also used to alter programmable settings such as VDS threshold and fault blank time. Detailed diagnostic information can be read through the serial interface. The A89503 was developed in accordance with ISO 26262 as a hardware safety element out of context with ASIL B capability (pending assessment) for use in...