DRV8818_15 Datasheet, PDF (1/31 Pages) Texas Instruments – DRV8818 Stepper Motor Controller IC

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DRV8818
SLVSAX9D – SEPTEMBER 2011 – REVISED JANUARY 2015
DRV8818 Stepper Motor Controller IC
1 Features
•1 Pulse Width Modulation (PWM) Microstepping
Motor Driver
– Built-In Microstepping Indexer
– Up to 1/8 Microstepping
– Step and Direction Control
– Programmable Mixed Decay, Blanking, and Off
Time
• Up to 2.5-A Current Per Winding
• Low 0.37-Ω (HS + LS) MOSFET R_DS(ON) (25°C)
• 8-V to 35-V Operating Supply Voltage Range
• Pin to Pin Upgrade for DRV8811 With Lower
R_DS(ON)
• Thermally Enhanced Surface Mount Package
• Protection Features
– VM Undervoltage Lockout (UVLO)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Fault Condition Indication Pin (nFAULT)
2 Applications
• Printers
• Textile Machinery
• Positioning/Tracking
• Factory Automation
• Robotics
3 Description
The DRV8818 provides an integrated stepper motor
driver solution for printers, scanners, and other
automated equipment applications. The device has
two H-bridge drivers, as well as microstepping
indexer logic to control a stepper motor.
The output driver block for each consists of N-
channel power MOSFETs configured as full H-
bridges to drive the motor windings.
A simple STEP/DIRECTION interface allows easy
interfacing to controller circuits. The mode pins allow
for configuration of the motor in full-step, half-step,
quarter-step, or eighth-step modes. Decay mode and
PWM off time are programmable.
Internal shutdown functions are provided for over
current protection, short circuit protection, under-
voltage lockout and overtemperature.
The DRV8818 is packaged in a PowerPAD™ 28-pin
HTSSOP package with PowerPAD™ (Eco-friendly:
RoHS and no Sb/Br).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8818
HTSSOP (28)
9.70 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
8 to 35 V
Controller
STEP
DIR
Step Size
DRV8818
Stepper
Motor Driver
2.5 A
HOMEn
M ^{2.5 A}
Protection
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.