Brushless DC Drivers

48 V Automotive 3-Phase BLDC Gate Driver with Inline Current Sensing over SPI

AMD89186

The AMD89186 is a 48 V automotive 3-phase BLDC gate driver with integrated inline current sensing for high-power steering and braking systems. Two integrated current sense amplifiers and a 12-bit ADC provide instantaneous and averaged digital current readback over Safe SPI, with excellent precision. The two-shunt architecture eliminates a third shunt and up to 3 dedicated microcontroller ADC channels, reducing system complexity and PCB requirements. A 12 V VREG input enables efficient gate drive, while register-map and footprint compatibility with the 12 V AMD89106 simplifies migration to 48 V platforms. Integrated safety and diagnostic features support ASIL D designs.

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Product Details

Top Features

  • Inline current sensing: direct motor phase current with only 2 current shunts
  • Wide voltage range: 4.5–80 V operation with efficient 12 V gate drive.
  • Fast Safe SPI: 48-bit interface up to 15 MHz with two phase current readback in single SPI frame.
  • Platform compatibility: Register-map and footprint compatibility with AMD89106 simplifies 12 V to 48 V migration.
  • Simplified architecture: Two-shunt in-phase current sensing with integrated battery disconnect and current over SPI.
  • Functional safety: ASIL D safety features, AEC-Q100 qualification, and A²-SIL™ technology.
Target Application