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Texas Instruments DRV8461 Stepper Motor Drivers

Texas Instruments DRV8461 Stepper Motor Drivers are wide-voltage, high-power, high-performance stepper motor drivers. These drivers support up to 65V supply voltage, and integrated MOSFETs with 300mΩ HS + LS on-resistance allow up to 3A current.

The auto-torque feature boosts efficiency by adjusting the coil current according to the load torque. Standstill power saving mode reduces power loss during a motor holding condition. Silent step decay mode delivers noiseless operation at low speeds and standstill. The internal current sense eliminates the need for sense resistors, saving system cost and saving PCB area. A built-in indexer supports up to 1/256 micro-stepping, and the automatic micro-stepping mode interpolates the input STEP signal to reduce overhead on the controller. Sensorless stall detection eliminates end stops from the system. The DRV8461 stepper motor drivers support other diagnostic and protection features for robust and reliable operation.

The DRV8461 requires minimal tuning to configure the advanced features. The Texas Instruments DRV8461 supports higher power density than external FET drivers, with a smaller PCB area. High energy efficiency with precise, noiseless operation makes the DRV8461 drivers ideal for high-performance stepper systems.

Features

Stepper motor driver:
- SPI or H/W interface with STEP/DIR pins
- Up to 1/256 micro-stepping indexer
4.5V to 65V operating supply voltage range
- Supports standard 24V, 36V, and 48V rails
Low R_DS(ON) (300mΩ HS + LS at 24V, 25°C)
High current capacity per bridge
- 3A full-scale, 2.1A RMS
DDW package is pin-to-pin compatible with
- DRV8452DDWR: 48V, 5A full-scale
- DRV8462DDWR: 65V, 5-10A full-scale
PWP package is pin-to-pin compatible with
- DRV8434/DRV8452: 48V, 2.5-5A
- DRV8424/DRV8426: 33V, 1.5-2.5A
Integrated current sensing and regulation
- ±5% full-scale current accuracy
Smart tune and mixed decay regulation options

Silent step decay mode for silent operation at a standstill and low speed
Automatic micro-stepping mode for step frequency interpolation
Customizable micro-stepping indexer table
Auto-torque for load-dependent current control
Standstill power saving mode
Supports 1.8V, 3.3V, and 5.0V logic inputs
Low-current sleep mode (2.5µA)
Separate logic supply voltage (V_CC)
Protection and Diagnostic features:
- Sensorless Stall Detection
- VM Undervoltage Lockout (UVLO)
- Open-load Detection (OL)
- Overcurrent protection (OCP)
- Thermal shutdown (OTSD)
- Fault condition output (nFAULT)
- Indexer zero position output (nHOME)

Applications

Factory automation, stepper drives, and robotics
Textile machines and sewing machines
Medical imaging, diagnostics, and equipment
Stage lighting
ATMs and currency counters

PLC, DCS, and PAC
Multifunction printers
3D printer
Outdoor IP camera

Texas Instruments DRV8461 Stepper Motor Drivers

Features

Applications

Simplified Schematic

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