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DRV8825 Datasheet

Stepper Motor Controller IC

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DRV8825
SLVSA73F – APRIL 2010 – REVISED JULY 2014
DRV8825 Stepper Motor Controller IC
1 Features
1 PWM Microstepping Stepper Motor Driver
– Built-In Microstepping Indexer
– Up to 1/32 Microstepping
• Multiple Decay Modes
– Mixed Decay
– Slow Decay
– Fast Decay
• 8.2-V to 45-V Operating Supply Voltage Range
• 2.5-A Maximum Drive Current at 24 V and
TA = 25°C
• Simple STEP/DIR Interface
• Low Current Sleep Mode
• Built-In 3.3-V Reference Output
• Small Package and Footprint
• Protection Features
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– VM Undervoltage Lockout (UVLO)
– Fault Condition Indication Pin (nFAULT)
2 Applications
• Automatic Teller Machines
• Money Handling Machines
• Video Security Cameras
• Printers
• Scanners
• Office Automation Machines
• Gaming Machines
• Factory Automation
• Robotics
3 Description
The DRV8825 provides an integrated motor driver
solution for printers, scanners, and other automated
equipment applications. The device has two H-bridge
drivers and a microstepping indexer, and is intended
to drive a bipolar stepper motor. The output driver
block consists of N-channel power MOSFET’s
configured as full H-bridges to drive the motor
windings. The DRV8825 is capable of driving up to
2.5 A of current from each output (with proper heat
sinking, at 24 V and 25°C).
A simple STEP/DIR interface allows easy interfacing
to controller circuits. Mode pins allow for configuration
of the motor in full-step up to 1/32-step modes. Decay
mode is configurable so that slow decay, fast decay,
or mixed decay can be used. A low-power sleep
mode is provided which shuts down internal circuitry
to achieve very low quiescent current draw. This
sleep mode can be set using a dedicated nSLEEP
pin.
Internal shutdown functions are provided for
overcurrent, short circuit, under voltage lockout and
over temperature. Fault conditions are indicated via
the nFAULT pin.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8825
HTSSOP (28)
9.70 mm × 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
8.2 to 45 V
Microstepping Current Waveform
STEP
DIR
Decay Mode
Step Size
nFAULT
DRV8825
2.5 A
Stepper
Motor Driver
2.5 A
1/32 µstep
M
+-
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

DRV8825 Datasheet Preview

DRV8825 Datasheet

Stepper Motor Controller IC

No Preview Available !

DRV8825
SLVSA73F – APRIL 2010 – REVISED JULY 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 Handling Ratings....................................................... 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Timing Requirements ................................................ 7
7.7 Typical Characteristics .............................................. 8
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 17
9 Application and Implementation ........................ 18
9.1 Application Information............................................ 18
9.2 Typical Application ................................................. 18
10 Power Supply Recommendations ..................... 21
10.1 Bulk Capacitance .................................................. 21
10.2 Power Supply and Logic Sequencing ................... 21
11 Layout................................................................... 22
11.1 Layout Guidelines ................................................. 22
11.2 Layout Example .................................................... 22
11.3 Thermal Protection................................................ 22
12 Device and Documentation Support ................. 24
12.1 Trademarks ........................................................... 24
12.2 Electrostatic Discharge Caution ............................ 24
12.3 Glossary ................................................................ 24
13 Mechanical, Packaging, and Orderable
Information ........................................................... 24
5 Revision History
Changes from Revision E (August 2013) to Revision F
Page
• Added new sections and reordered data sheet to fit new TI flow .......................................................................................... 1
• Updated pin descriptions ....................................................................................................................................................... 3
• Added power supply ramp rate and updated ISENSEx pin voltage in Absolute Maximum Ratings ..................................... 4
• Updated VIL voltage minimum and typical in Electrical Characteristics ................................................................................. 6
• Updated IIN and tDEG in Electrical Characteristics .................................................................................................................. 6
2 Submit Documentation Feedback
Product Folder Links: DRV8825
Copyright © 2010–2014, Texas Instruments Incorporated


Part Number DRV8825
Description Stepper Motor Controller IC
Maker etcTI
Total Page 30 Pages
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