Brushless DC Drivers
12 V Automotive 3-Phase BLDC Gate Driver with Inline Current Sensing over SPI
AMD89106
Markets Served
The AMD89106 is a 12 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 frees up to 3adedicated microcontroller ADC channels, reducing system complexity, BOM, and board area. Integrated battery-disconnect gate drive, a dedicated BRAKE pin, and safety and diagnostic features support ASIL D designs.
Product Details
Product Details
Top Features
- Inline current sensing: direct motor phase current with only 2 current shunts
- Wide voltage range: 4.5–42 V operation with charge pump and 100% duty cycle.
- High gate-drive capability: Drives MOSFETs up to 175 nC at 20 kHz PWM.
- Fast Safe SPI: 48-bit interface up to 15 MHz with two-phase current readback in single SPI frame.
- Simplified architecture: Two-shunt in-phase current sensing eliminates three low-side shunts in redundant systems.
- Integrated motor control: Battery-disconnect gate drive and dedicated BRAKE pin.
- Functional safety: ASIL D safety features, extensive diagnostics, AEC-Q100 qualification, and A²-SIL™ technology.
Target Application
