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DRV8425
35V, 2A bipolar stepper motor driver with integrated current sensing and 1/256 microstepping
Data sheet
DRV8425
- PWM microstepping stepper motor driver
- Simple STEP/DIR interface
- Up to 1/256 microstepping indexer
- Integrated current sense functionality
- No sense resistors required
- ±5% full-scale current accuracy
- Smart tune decay technology, fixed slow, and mixed decay options
- 4.5 to 33-V operating supply voltage range
- Low RDS(ON):
- DRV8424: 330 mΩ HS + LS at 24 V, 25°C
- DRV8425: 550 mΩ HS + LS at 24 V, 25°C
- High current capacity per bridge
- DRV8424: 4 A peak, 2.5 A full-scale, 1.8 A rms
- DRV8425: 3.2 A peak, 2 A full-scale, 1.4 A rms
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Pin to pin compatible with -
- Configurable off-time PWM chopping
- 7-µs, 16-µs, 24-µs, or 32-µs.
- Supports 1.8-V, 3.3-V, 5.0-V Logic Inputs
- Low-Ccrrent sleep mode (2 µA)
- Spread spectrum clocking for low electromagnetic interference (EMI)
- Small package and footprint
- Protection features
- VM undervoltage lockout (UVLO)
- Charge pump undervoltage (CPUV)
- Overcurrent protection (OCP)
- Thermal shutdown (OTSD)
- Fault condition output (nFAULT)
The DRV8424/25 are stepper motor drivers for industrial and consumer applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8424 is capable of driving up to 2.5-A full-scale output current; and the DRV8425 is capable of driving up to 2-A full-scale output current (dependent on PCB design).
The DRV8424/25 use an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The devices use an internal PWM current regulation scheme selectable between smart tune, slow and mixed decay options. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects and reduces audible noise from the motor.
A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. 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 the nFAULT pin.
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Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | DRV8424/25 Stepper Drivers With Integrated Current Sense, 1/256 Microstepping, STEP/DIR Interface and smart tune Technology datasheet (Rev. C) | PDF | HTML | 21 Apr 2022 |
| Application brief | Advantages of Integrated Current Sensing (Rev. B) | PDF | HTML | 20 Jun 2022 | |
| Application note | Methods to Configure Current Regulation for Brushed and Stepper Motors (Rev. B) | PDF | HTML | 19 Jan 2021 | |
| White paper | How smart tune regulates current in stepper motors (Rev. A) | 19 Mar 2019 | ||
| Application brief | Smart Tuning for Efficient Stepper Driving | 20 Nov 2018 | ||
| Application note | PowerPAD™ Thermally Enhanced Package (Rev. H) | 06 Jul 2018 | ||
| Application brief | PowerPAD™ Made Easy (Rev. B) | 12 May 2004 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
DRV8424EVM — DRV8424 STEP/DIR control interface stepper motor driver board
The DRV8424 evaluation module (EVM) allows easy evaluation of the DRV8424 device.
The DRV8424 devices are integrated motor-driver solutions for bipolar stepper motors. The device integrates two N-channel power MOSFET H-bridges, integrated current sense and regulation circuitry, and a microstepping (...)
User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
Ordering & quality
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