Overview
The DRV8889QWRGERQ1 is a fully integrated stepper motor driver designed by Texas Instruments for automotive applications. This device supports up to 1/256 levels of microstepping, enabling smooth motion profiles. It features an internal microstepping indexer, smart tune decay technology, and advanced stall detection algorithms. The DRV8889QWRGERQ1 is AEC-Q100 qualified, ensuring reliability in automotive environments. It integrates two N-channel power MOSFET H-bridge drivers and an internal current sense architecture, eliminating the need for external power sense resistors and reducing system cost and PCB area.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Power Supply Voltage (VM) | -0.3 | 45 | V | |
| Output Current (Full Scale) | 1.5 | A | ||
| Output Current (Peak) | 2.4 | A | ||
| High-Side FET On Resistance (RDS(ONH)) at 25°C | 450 | 550 | 550 | mΩ |
| Low-Side FET On Resistance (RDS(ONL)) at 25°C | 450 | 550 | 550 | mΩ |
| Operating Temperature Range | -40 | 150 | °C | |
| Sleep Mode Current | 2 | μA |
Key Features
- Up to 1/256 microstepping for smooth motion profiles
- Integrated current sense functionality, eliminating the need for external sense resistors
- Smart tune decay technology for optimal current regulation performance
- Fixed slow and mixed decay options
- Configurable off-time PWM chopping
- Simple STEP/DIR interface for direction and step rate management
- Full duplex, 4-wire synchronous SPI communication with daisy chain support for up to 63 devices
- Low-power sleep mode (2 μA)
- Programmable output slew rate and open load detection time
- Spread spectrum clocking to minimize EMI
- Torque DAC for scaling output current without scaling VREF voltage
- Protection features: VM undervoltage lockout, overcurrent protection, stall detection, open load detection, overtemperature warning and shutdown, undertemperature warning, and fault condition indication pin (nFAULT)
Applications
- Automotive bipolar stepper motors
- Headlight position adjustment
- Head-up display (HUD)
- HVAC stepper motors
- Electronic fuel injection (EFI)
Q & A
- What is the maximum output current of the DRV8889QWRGERQ1?
The DRV8889QWRGERQ1 can provide up to 2.4-A peak and 1.5-A full-scale output current.
- What is the operating voltage range of the DRV8889QWRGERQ1?
The device operates with a supply voltage range from 4.5 to 45 V.
- Does the DRV8889QWRGERQ1 require external sense resistors?
No, the device integrates an internal current sense architecture, eliminating the need for external power sense resistors.
- What communication interface does the DRV8889QWRGERQ1 support?
The device supports full duplex, 4-wire synchronous SPI communication with daisy chain support for up to 63 devices.
- What are the key protection features of the DRV8889QWRGERQ1?
The device includes VM undervoltage lockout, overcurrent protection, stall detection, open load detection, overtemperature warning and shutdown, undertemperature warning, and a fault condition indication pin (nFAULT).
- How does the smart tune decay technology work?
Smart tune decay technology automatically adjusts for optimal current regulation performance and compensates for motor variation and aging effects.
- What is the purpose of the torque DAC feature?
The torque DAC feature allows the controller to scale the output current without needing to scale the VREF voltage reference.
- Does the DRV8889QWRGERQ1 support low-power modes?
- What are the package options for the DRV8889QWRGERQ1?
The device is available in HTSSOP (24-pin) and VQFN (24-pin) packages.
- Is the DRV8889QWRGERQ1 suitable for automotive applications?
