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Allegro MicroSystems A89103 3-Phase Battery Isolator MOSFET Drivers

Allegro MicroSystems A89103 3-Phase Battery Isolator MOSFET Drivers are N-channel power MOSFET drivers capable of controlling five MOSFETs to provide motor-phase and supply isolation in three-phase BLDC applications. Three floating gate-drive outputs maintain phase-isolator power MOSFETs in the on state, over the entire supply range, with high phase voltage and dv/dt on the motor-phase connection for 12V and 48V 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 maintains sufficient gate drive power (>7.5V) for battery voltages down to 4.5V with 100kΩ gate-source resistors.

The SPI interface configures, monitors, and controls the five floating gate drives. When not in use, the A89103 can be placed in a low-power sleep mode. Undervoltage monitors check that the pumped supply voltage and the gate drive outputs are high enough to ensure that the MOSFETs are maintained in a safe conducting state. The A89103 is supplied in a 28-contact wettable-flank quad flat no-lead (QFN) package (suffix ET) and 28-contact wettable-flank QFN (suffix EV), both with exposed pads for enhanced thermal dissipation. The Allegro MicroSystems A89103 3-Phase Battery Isolator MOSFET Drivers are lead (Pb) free, with 100% matte tin leadframe plating.

Features

  • Automotive AEC-Q100 qualified
  • 5x floating N-channel MOSFET drives
  • Maintains VGS with 100kΩ gate-source resistors
  • Integrated charge pump controller
  • 4.5V to 85V 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
  • A2-SIL™ product 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
  • Lead-free

Applications

  • 3-phase and battery isolation for ASIL systems up to level B
  • Electric power steering (EPS)
  • Electric braking (EMB)
  • Redundant motor-control systems

Specifications

  • 3.3V or 5V typical I/O logic voltage options
  • 200mV to 300mV VDD undervoltage hysteresis
  • 2.5MHz to 5.5MHz internal timing clock frequency
  • 2µs maximum turn-on rise time
  • 0.2µs maximum turn-off fall time
  • Propagation delay time
    • 0.85µs maximum turn-on
    • 0.4µs maximum turn-off
  • Turn-on pulse
    • 8.5mA to 14.5mA current range
    • 16µs to 36µs time range
  • 6.5Ω to 13Ω maximum pull-down on-resistance range
  • 100kΩ minimum gate drive static load resistor
  • Package options
    • 5mm x 5mm x 0.75mm 28-contact QFN with exposed thermal pad
    • 6mm x 6mm x 0.9mm 28-contact QFN with exposed thermal pad
  • ESD ratings
    • CDM Class C3, withstand threshold of 1000V, AEC-Q100-011JS-002
    • HBM Class 2, withstand threshold of 1500V, AEC-Q100-002/JS-00102017

Typical Application

Application Circuit Diagram - Allegro MicroSystems A89103 3-Phase Battery Isolator MOSFET Drivers

Block Diagrams

Block Diagram - Allegro MicroSystems A89103 3-Phase Battery Isolator MOSFET Drivers

Learn More About

Allegro MicroSystems Empowering the Future with 48V Systems

Designed with 110V automotive-qualified silicon process technology to offer improved performance.

Learn Moreüber Allegro MicroSystems Empowering the Future with 48V Systems
Veröffentlichungsdatum: 2024-04-18 | Aktualisiert: 2024-08-15