Allegro MicroSystems A89110 Three-Phase Integrated MOSFET Drivers
Allegro MicroSystems A89110 Three-Phase Integrated MOSFET Drivers are specifically designed for automotive applications with inductive loads, including BLDC and stepper motors. A unique charge pump regulator provides full gate drive from 4.5V to 40V. The gate drive voltage and strength are programmable to improve EMC performance.
The integrated diagnostics indicate multiple internal, system, and power bridge faults. The user can also configure them to protect the power MOSFETs under most short-circuit conditions. The device provides full control over all six power MOSFETs in the three-phase bridge, allowing the user to drive motors with block commutation or sinusoidal excitation. The power MOSFETs are protected from shoot-through by integrated crossover control and integrated dead-time. The serial interface can read detailed diagnostic information.
The A89110 was developed in accordance with ISO 26262 as a hardware safety element with ASIL B capability for use in automotive safety-related systems when integrated and used in accordance with the applicable safety manual and datasheet. Allegro MicroSystems supplies the A89110 in a 28-contact wettable-flank QFN (ET) package featuring an exposed pad for enhanced thermal dissipation.
Features
- 3-phase integrated MOSFET driver
- Cross-conduction protection with integrated dead-time
- Charge pump for low supply voltage operation
- 4.5V to 40V supply voltage operating range
- Integrated logic supply
- High output current capability, up to 4.3A
- Low MOSFET on-state resistance - 240mΩ (typ.) RDS(ON) (high-side + low-side) at TA = 25°C
- Multiple control interface options
- 6× PWM control interface
- 3× PWM control interface
- 2MHz 16-bit SPI-compatible serial interface
- Automotive AEC-Q100 qualified
- ASIL Compliant - ASIL B safety element out-of-context (SEooC) developed in accordance with ISO 26262, when used as specified in the safety manual
- SPI-compatible serial interface
- Bridge control by direct logic inputs
- Programmable gate drive
- Current sense amplifier
- Programmable diagnostics
Applications
- In-cabin motors
- Electronic parking brake
- Robotics
- Heat pump
Typical Application
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