DRV8824_16 Datasheet, PDF (1/35 Pages) Texas Instruments – Stepper Motor Controller IC

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DRV8824
SLVSA06J – OCTOBER 2009 – REVISED JULY 2014
DRV8824 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
• 1.6-A Maximum Drive Current at 24 V and
T_A = 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)
– VMx 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 DRV8824 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 MOSFETs
configured as full H-bridges to drive the motor
windings. The DRV8824 is capable of driving up to
1.6 A of current from each output (with proper
heatsinking, 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, undervoltage lockout, and
over temperature. Fault conditions are indicated
through the nFAULT pin.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8824
HTSSOP (28)
QFN (28)
9.70 mm × 6.40 mm
5.00 mm × 5.00 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
DRV8824
1.6 A
Stepper Motor
Driver
1/32 µstep
1.6 A
M
+±
1
STEP Input
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.