DRV8889-Q1

• AEC-Q100 Qualified for Automotive
• Up to 1/256 microstepping
• Integrated current sense functionality
  • No sense resistors required
• Smart tune decay technology, Fixed slow, and mixed decay options
• 4.5 to 45-V Operating supply voltage range
• Pin to pin R_DS(ON) variants:

  - DRV8889/A-Q1: 900 mΩ HS + LS at 25°C

  - DRV8899-Q1: 1200 mΩ HS + LS at 25°C
• High current capacity per bridge
  • DRV8889/A-Q1: 2.4-A peak, 1.5-A full-scale
  • DRV8899-Q1: 1.7-A peak, 1-A full-scale
• TRQ_DAC bits to scale full-scale current
• Configurable off-time PWM chopping
  • 7-µs, 16-µs, 24-µs, or 32-µs.
• Simple STEP/DIR interface
• SPI with daisy chain support
• Low-current sleep mode (2 µA)
• Programmable output slew rate
• Programmable open load detection time with DRV8889A-Q1
• Spread spectrum clocking to minimize EMI
• Protection features
  • VM undervoltage lockout
  • Overcurrent protection
  • Stall detection
  • Open load detection
  • Overtemperature warning and shutdown
  • Undertemperature warning
  • Fault condition indication pin (nFAULT)

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The DRV8889-Q1 and DRV8889A-Q1 are fully integrated stepper motor drivers, supporting up to 1.5 A full scale current with an internal microstepping indexer, smart tune decay technology, advanced stall detection algorithm, and integrated current sensing.

With a simple step/dir interface, the device supports up to 1/256 levels of microstepping to enable a smooth motion profile. Integrated current sensing eliminates the need for two external resistors, saving board space and cost. With advanced stall detection algorithm, designers can detect if the motor stopped and take action as needed which can improve efficiency and reduce noise. The device provides 8 decay mode options including: smart tune, slow, and mixed decay options. Smart tune automatically adjusts for optimal current regulation performance. The device also includes an integrated torque DAC which allows for the controller to scale the output current through SPI without needing to scale the VREF voltage reference. A low-power sleep mode is provided using an nSLEEP pin. The device features full duplex, 4-wire synchronous SPI communication, with daisy chain support for up to 63 devices connected in series, for configurability and detailed fault reporting.

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