DRV8821 Driver Datasheet

DRV8821 Datasheet PDF, Equivalent


Part Number

DRV8821

Description

Dual Stepper Motor Controller and Driver

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DRV8821
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DRV8821
SLVS912J – JANUARY 2009 – REVISED JANUARY 2016
DRV8821 Dual Stepper Motor Controller and Driver
1 Features
1 Dual PWM Microstepping Motor Driver
– Built-In Microstepping Indexers
– Up to 1.5-A Current Per Winding
– Three-Bit Winding Current Control Allows up to
Eight Current Levels
– Low MOSFET On-Resistance
– Selectable Slow or Mixed Decay Modes
• 8-V to 32-V Operating Supply Voltage Range
• Internal Charge Pump for Gate Drive
• Built-in 3.3-V Reference
• Simple Step/Direction Interface
• Fully Protected Against Undervoltage,
Overtemperature, and Overcurrent
• Thermally-Enhanced Surface Mount Package
2 Applications
• Printers
• Scanners
• Office Automation Machines
• Gaming Machines
• Factory Automation
• Robotics
3 Description
The DRV8821 provides a dual microstepping-capable
stepper motor controller/driver solution for printers,
scanners, and other office automation equipment
applications.
Two independent stepper motor driver circuits include
four H-bridge drivers and microstepping-capable
indexer logic. Each of the motor driver blocks employ
N-channel power MOSFETs configured as an H-
bridge to drive the motor windings.
A simple step/direction interface allows easy
interfacing to controller circuits. Pins allow
configuration of the motor in full-step, half-step,
quarter-step, or eighth step modes, and the selection
of slow or mixed decay modes.
Internal shutdown functions are provided for over
current protection, short-circuit protection,
undervoltage lockout, and overtemperature.
The DRV8821 is packaged in a 48-pin HTSSOP
package (Eco-friendly : RoHS & no Sb/Br).
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8821
HTSSOP (48)
6.10 mm x 12.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
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.

DRV8821
DRV8821
SLVS912J – JANUARY 2009 – REVISED JANUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 6
6.7 Dissipation Ratings ................................................... 6
6.8 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application ................................................. 16
9 Power Supply Recommendations...................... 19
9.1 Bulk Capacitance .................................................... 19
10 Layout................................................................... 20
10.1 Layout Guidelines ................................................. 20
10.2 Layout Example .................................................... 21
10.3 Thermal Considerations ........................................ 22
11 Device and Documentation Support ................. 24
11.1 Documentation Support ....................................... 24
11.2 Community Resources.......................................... 24
11.3 Trademarks ........................................................... 24
11.4 Electrostatic Discharge Caution ............................ 24
11.5 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision I (January 2014) to Revision J
Page
• Added Pin Functions table, ESD Ratings table, Thermal Information table, Detailed Description section, Application
and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section................................................................ 1
Changes from Revision H (August 2013) to Revision I
Page
• Changed typo in Overcurrent Protection section ................................................................................................................. 14
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Product Folder Links: DRV8821
Copyright © 2009–2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DRV8821 SLVS912J – JANUARY 2009 – REVISED JANUARY 2016 DRV8821 Dual Stepper Motor Controller and Drive r 1 Features •1 Dual PWM Microsteppi ng Motor Driver – Built-In Microstepp ing Indexers – Up to 1.5-A Current Pe r Winding – Three-Bit Winding Current Control Allows up to Eight Current Lev els – Low MOSFET On-Resistance – Se lectable Slow or Mixed Decay Modes • 8-V to 32-V Operating Supply Voltage Ra nge • Internal Charge Pump for Gate D rive • Built-in 3.3-V Reference • S imple Step/Direction Interface • Full y Protected Against Undervoltage, Overt emperature, and Overcurrent • Thermal ly-Enhanced Surface Mount Package 2 App lications • Printers • Scanners • Office Automation Machines • Gaming Machines • Factory Automation • Rob otics 3 Description The DRV8821 provid es a dual microstepping-capable stepper motor controller/driver solution for printers, scanners, and other office automation equipment applica.
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