DRV2604 Datasheet, PDF (1/5 Pages) Texas Instruments – Haptic Driver for ERM and LRA with Internal Memory and Smart Loop Architecture

DRV2604
www.ti.com
SLOS824 – DECEMBER 2012
Haptic Driver for ERM and LRA with Internal Memory and Smart Loop Architecture
Check for Samples: DRV2604
FEATURES
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• Flexible Haptic/Vibra Driver
– LRA (Linear Resonance Actuator)
– ERM (Eccentric Rotating Mass)
• I²C Controlled Digital Playback Engine
– Internal RAM for Customized Waveforms
– Real-Time Playback Mode via I²C
• Smart Loop Architecture⁽¹⁾
– Automatic Overdrive/Braking (ERM/LRA)
– Automatic Resonance Tracking (LRA)
– Automatic Actuator Diagnostic (ERM/LRA)
– Automatic Level Calibration (ERM/LRA)
• Optional PWM Input with 0% to 100% Duty
Cycle Control Range
• Optional Analog Input Control
• Optional Hardware Trigger Pin
• Efficient Output Drive
• Fast Start Up Time
• Constant Acceleration Over Supply Voltage
• 1.8 V Compatible, VDD Tolerant Digital Pins
• Available in a 9-Ball, 0.5 mm Pitch WCSP
(1) _{Patent pending control algorithm}
APPLICATIONS
• Mobile Phones
• Tablets
• Touch-Enabled Devices
DESCRIPTION
The DRV2604 is designed to give extremely flexible
haptic control of ERM and LRA actuators over a
shared I²C compatible bus. This relieves the host
processor from ever generating pulse-width
modulated (PWM) drive signals, saving both costly
timer interrupts and hardware pins.
The DRV2604 includes enough integrated RAM to
allow the user to pre-load over 100 customized
waveforms. These waveforms can be instantly played
back via I²C or optionally triggered via a hardware
trigger pin. Additionally, the real-time playback mode
allows the host processor to bypass the library
playback engine and play waveforms directly from the
host via I2C.
The DRV2604 also contains a smart loop
architecture, which allows effortless auto resonant
drive for LRA as well as feedback-optimized ERM
drive. This feedback gives automatic overdrive and
braking, which creates a simplified input waveform
paradigm as well as reliable motor control and
consistent motor performance.
The DRV2604 features a trinary-modulated output
stage, providing greater efficiency than linear-based
output drivers. The 9-ball WCSP footprint, flexible
operation, and low component count make the
DRV2604 the ideal choice for portable and touch-
enabled vibratory and haptic applications.
2.5 V – 5.5 V
I2C
Control
SDA
SCL
EN
IN/Trigger
VDD
DRV2604
I2C
I/F
RAM
REG
C_VREG
Feedback
Detection
Playback Engine
Auto Calibration
Auto Diagnostic
Driver
GND
OUT+
OUT-
LRA or
DC Motor
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated