DRV8834 Driver Datasheet

DRV8834 Datasheet, PDF, Equivalent


Part Number

DRV8834

Description

Dual-Bridge Stepper or DC Motor Driver

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DRV8834
SLVSB19D – FEBRUARY 2012 – REVISED MARCH 2015
DRV8834 Dual-Bridge Stepper or DC Motor Driver
1 Features
1 Dual-H-Bridge Current-Control Motor Driver
– Capable of Driving Two DC Motors or One
Stepper Motor
• Two Control Modes:
– Built-In Indexer Logic With Simple
STEP/DIRECTION Control and Up to
1/32-Step Microstepping
– PHASE/ENABLE Control, With the Ability to
Drive External References for > 1/32-Step
Microstepping
• Output Current 1.5-A Continuous, 2.2-A Peak per
H-Bridge (at VM = 5 V, 25°C)
• Low RDS(ON): 305-mΩ HS + LS
(at VM = 5 V, 25°C)
• Wide Power Supply Voltage Range:
2.5 V to 10.8 V
• Dynamic tBLANK and Mixed Decay Modes for
Smooth Microstepping
• PWM Winding Current Regulation and Limiting
• Thermally Enhanced Surface-Mount Package
2 Applications
• Battery-Powered Toys
• POS Printers
• Video Security Cameras
• Office Automation Machines
• Gaming Machines
• Robotics
3 Description
The DRV8834 provides a flexible motor driver
solution for toys, printers, cameras, and other
mechatronic applications. The device has two H-
bridge drivers, and is intended to drive a bipolar
stepper motor or two DC motors.
The output driver block of each H-bridge consists of
N-channel power MOSFETs configured as an H-
bridge to drive the motor windings. Each H-bridge
includes circuitry to regulate or limit the winding
current.
With proper PCB design, each H-bridge of the
DRV8834 can driving up to 1.5-A RMS (or DC)
continuously, at 25°C with a VM supply of 5 V. The
device can support peak currents of up to 2.2 A per
bridge. Current capability is reduced slightly at lower
VM voltages.
Internal shutdown functions with a fault output pin are
provided for overcurrent protection, short-circuit
protection,
undervoltage
lockout
and
overtemperature. A low-power sleep mode is also
provided.
The DRV8834 is packaged in a 24-pin HTSSOP or
VQFN package with PowerPAD™ (Eco-friendly:
RoHS & no Sb/Br).
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8834
HTSSOP (24)
VQFN (24)
7.80 mm × 4.40 mm
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
2.5 V to 10.8 V
STEP
DIR
Decay Mode
Step Size
nFAULT
DRV8834
Stepper
Motor
Driver
1/32 µstep
1.5
A
1.5
A
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.

DRV8834
DRV8834
SLVSB19D – FEBRUARY 2012 – REVISED MARCH 2015
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......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings ............................................................ 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information ................................................. 6
7.5 Electrical Characteristics........................................... 7
7.6 Timing Requirements ................................................ 8
7.7 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 20
9.1 Application Information............................................ 20
9.2 Typical Application .................................................. 20
10 Power Supply Recommendations ..................... 29
10.1 Bulk Capacitance .................................................. 29
11 Layout................................................................... 30
11.1 Layout Guidelines ................................................. 30
11.2 Layout Example .................................................... 30
11.3 Thermal Considerations ........................................ 30
12 Device and Documentation Support ................. 32
12.1 Documentation Support ....................................... 32
12.2 Trademarks ........................................................... 32
12.3 Electrostatic Discharge Caution ............................ 32
12.4 Glossary ................................................................ 32
13 Mechanical, Packaging, and Orderable
Information ........................................................... 32
5 Revision History
Changes from Revision C (June 2013) to Revision D
Page
• Added ESD Ratings table, Features Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section .................................................................................................. 1
• Deleted Ordering Information table. ....................................................................................................................................... 3
2 Submit Documentation Feedback
Product Folder Links: DRV8834
Copyright © 2012–2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DRV8834 SLVSB19D – FEBRUAR Y 2012 – REVISED MARCH 2015 DRV8834 D ual-Bridge Stepper or DC Motor Driver 1 Features •1 Dual-H-Bridge Current-C ontrol Motor Driver – Capable of Driv ing Two DC Motors or One Stepper Motor • Two Control Modes: – Built-In Ind exer Logic With Simple STEP/DIRECTION C ontrol and Up to 1/32-Step Microsteppin g – PHASE/ENABLE Control, With the Ab ility to Drive External References for > 1/32-Step Microstepping • Output Cu rrent 1.5-A Continuous, 2.2-A Peak per H-Bridge (at VM = 5 V, 25°C) • Low R DS(ON): 305-mΩ HS + LS (at VM = 5 V, 2 5°C) • Wide Power Supply Voltage Ran ge: 2.5 V to 10.8 V • Dynamic tBLANK and Mixed Decay Modes for Smooth Micros tepping • PWM Winding Current Regulat ion and Limiting • Thermally Enhanced Surface-Mount Package 2 Applications Battery-Powered Toys • POS Printer s • Video Security Cameras • Office Automation Machines • Gaming Machines • Robotics 3 Descript.
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