DRV8461中文资料德州仪器数据手册PDF规格书

1 Features

• Stepper Motor Driver

– SPI or H/W Interface with STEP/DIR pins

– Up to 1/256 Microstepping Indexer

• 4.5 V to 65 V Operating Supply Voltage Range

– Supports standard 24 V, 36 V and 48 V rails

• Low RDS(ON): 300 mΩ HS + LS at 24 V, 25°C

• High Current Capacity Per Bridge:

– 3 A full-scale, 2.1 A RMS

• DDW package pin-to-pin compatible with -

– DRV8452DDWR: 48 V, 5A full-scale

– DRV8462DDWR: 65 V, 5- 10A full-scale

• PWP package pin-to-pin compatible with -

– DRV8434/52: 48 V, 2.5-5A

– DRV8424/26: 33 V, 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

standstill and low speed

• Automatic Microstepping mode for step

frequency interpolation

• Customizable microstepping indexer table

• Auto-torque for load dependent current control

• Standstill Power Saving mode

• Supports 1.8-V, 3.3-V, 5.0-V logic inputs

• Low-current sleep mode (2.5 μA)

• Separate logic supply voltage (VCC)

• 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)

2 Applications

• Factory Automation, Stepper Drives and Robotics

• Textile Machines, Sewing machines

• Medical Imaging, Diagnostics and Equipment

• Stage Lighting

• ATMs, Currency Counters

• PLC, DCS & PAC

• Multifunction Printers

• 3D Printer

• Outdoor IP Camera

3 Description

The DRV8461 is a wide-voltage, high-power, highperformance

stepper motor driver. The device

supports up to 65-V supply voltage, and integrated

MOSFETs with 300 mΩ HS + LS on-resistance allow

up to 3-A current.

The auto-torque feature boosts efficiency by adjusting

the coil current according to load torque. Standstill

power saving mode reduces power loss during 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 PCB area and system cost. Built-in

indexer supports up to 1/256 microstepping, and the

automatic microstepping mode interpolates the input

STEP signal to reduce overhead on the controller.

Sensorless stall detection eliminates end stops from

the system. The device supports other protection and

diagnostic features for robust and reliable operation.

The DRV8461 requires minimal tuning to configure

the advanced features. The DRV8461 supports higher

power density compared to external FET drivers,

with a smaller PCB area. High energy efficiency with

precise, noiseless operation makes the DRV8461 an

ideal choice for high-performance stepper systems.