DRV8849
38-V 1.5-A dual stepper motor driver with smart tune and integrated current sensing
DRV8849
- Dual stepper motor driver
- STEP/DIR interface
- Up to 1/256 microstepping indexer
- 4.5 to 38-V Operating supply voltage range
- 900 mΩ HS + LS RDS(ON) at 24 V, 25°C
- 1.5 A full-scale, 1.1 A rms current per H-bridge
- Integrated current sense functionality
- ±5% full-scale current accuracy
- No sense resistors required
- Smart tune decay technology
- Configurable off-time PWM chopping in Smart tune
- 8-µs, 16-µs, or 32-µs
- Supports 3.3-V, 5.0-V logic inputs
- Low-current sleep mode (1.3 µA)
- Protection features for each Stepper
- VM undervoltage lockout (UVLO)
- Charge pump undervoltage (CPUV)
- Overcurrent protection (OCP)
- Thermal shutdown (OTSD)
- Fault condition output (nFAULT)
The DRV8849 is a dual stepper motor driver for industrial and consumer applications. The device is fully integrated with four N-channel power MOSFET H-bridge drivers, one microstepping indexer for each stepper, and integrated current sensing. The DRV8849 is capable of driving up to 1.5-A full-scale output current (dependent on PCB design).
The DRV8849 uses an internal current sense architecture to eliminate the need for four external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune decay mode. Smart tune automatically adjusts for desired current regulation, compensates for motor variation and aging effects and reduces audible noise and vibration from the motor.
Simple STEP/DIR interfaces allow an external controller to manage the direction and step rate of the stepper motors. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin. Protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by one nFAULT pin for each stepper.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | DRV8849: 38 V, 1.5 A Dual Stepper Driver with Integrated Current Sense, 1/256 Microstepping, STEP/DIR Interface and Smart Tune datasheet (Rev. A) | PDF | HTML | 13 Jul 2023 |
Product overview | Brushed and Stepper Motor Drivers in Video Surveillance | PDF | HTML | 22 Feb 2024 | |
Product overview | Two New Dual-Stepper Motor Drivers | PDF | HTML | 22 Feb 2024 | |
Certificate | DRV8849EVM EU RoHS Declaration of Conformity (DoC) | 28 Mar 2023 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
DRV8849EVM — DRV8849 evaluation module for dual stepper motor driver with smart tune and integrated current sense
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (RHH) | 36 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.