Small Package and Footprint
The DRV8434S is a stepper motor driver 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 DRV8434S is capable of driving up to 2.5-A full-scale output current (dependent on PCB design).
The DRV8434S uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme selectable between smart tune, slow and mixed decay options. Smart tune automatically adjusts for optimal current regulation and reduces audible noise from the motor.
A simple SPI interface with STEP/DIR pins 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. With advanced stall detection algorithm, designers can detect if the motor stopped and take action as needed. The device also includes an integrated torque DAC which allows scaling the output current through SPI without needing to scale the VREF reference. Other protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.
A low-power sleep mode is provided for very low standby current 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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | DRV8434S Stepper Driver With Integrated Current Sense, 1/256 Microstepping, SPI Interface, Smart Tune Technology and Stall Detection datasheet | PDF | HTML | 07 Dec 2020 |
| Application note | How to Improve Motion Smoothness and Accuracy of Stepper Motors (Rev. A) | PDF | HTML | 11 Oct 2021 | |
| Certificate | DRV8434SEVM EU RoHS Declaration of Conformity (DoC) | 07 Dec 2020 | ||
| User guide | DRV8434SEVM GUI User's Guide | 25 Nov 2020 | ||
| EVM User's guide | DRV8434SEVM User's Guide | 25 Nov 2020 | ||
| Application note | How to Reduce Audible Noise in Stepper Motors | PDF | HTML | 21 Apr 2020 | |
| Application note | Sensorless Stall Detection With the DRV8889-Q1 | 10 Jan 2020 |
For additional terms or required resources, click any title below to view the detail page where available.
The DRV8434S evaluation module (EVM) allows easy evaluation of the DRV8434S device.
The DRV8434S is a fully integrated stepper motor driver, supporting up to 2.5 A full scale current with an internal microstepping indexer, smart tune decay technology, advanced stall detection algorithm, and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
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