DRV2604L Datasheet, PDF (1/73 Pages) Texas Instruments – DRV2604L 2- to 5.2-V Haptic Driver for LRA and ERM with Internal Memory and Smart-Loop Architecture

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DRV2604L
SLOS866D – MAY 2014 – REVISED JUNE 2015
DRV2604L 2- to 5.2-V Haptic Driver for LRA and ERM
with Internal Memory and Smart-Loop Architecture
1 Features
•1 Flexible Haptic and Vibration Driver
– LRA (Linear Resonance Actuator)
– ERM (Eccentric Rotating Mass)
• I²C-Controlled Digital Playback Engine
– Waveform Sequencer and Trigger
– Real-Time Playback Mode through I²C
– Internal RAM for Customized Waveforms
– I²C Dual-Mode Drive (Open and Closed Loop)
• Smart-Loop Architecture (Patent Pending Control
Algorithm)
– Automatic Overdrive and Braking
– Automatic Resonance Tracking and Reporting
(LRA Only)
– Automatic Actuator Diagnostic
– Automatic Level Calibration
– Wide Support for Actuator Models
• Immersion TouchSense^® 3000 Compatible
• Drive Compensation Over Battery Discharge
• Wide Voltage Operation (2 V to 5.2 V)
• Efficient Differential Switching Output Drive
• PWM Input with 0% to 100% Duty-Cycle Control
Range
• Hardware Trigger Input
• Fast Startup Time
• 1.8-V Compatible, V_DD-Tolerant Digital Interface
2 Applications
• Mobile Phones
• Tablets
3 Description
The DRV2604L device is a low-voltage haptic driver
that provides a closed-loop actuator-control system
for high-quality tactile feedback for ERM and LRA.
This schema helps improve actuator performance in
terms of acceleration consistency, start time, and
brake time and is accessible through a shared I²C
compatible bus or PWM input signal.
The DRV2604L device includes enough integrated
RAM to allow the user to pre-load over 100
customized smart-loop architecture waveforms.
These waveforms can be instantly played back
through I²C or optionally triggered through a
hardware trigger terminal.
Additionally, the real-time playback mode allows the
host processor to bypass the memory playback
engine and play waveforms directly from the host
through I²C.
The smart-loop architecture inside the DRV2604L
device allows simple auto-resonant drive for the LRA
as well as feedback-optimized ERM drive allowing for
automatic overdrive and braking. The smart-loop
architecture creates a simplified input waveform
interface as well as reliable motor control and
consistent motor performance. The DRV2604L device
also features automatic transition to an open-loop
system in the event that an LRA actuator is not
generating a valid back-EMF voltage. When the LRA
generates a valid back-EMF voltage, the DRV2604L
device automatically synchronizes with the LRA. The
DRV2604L also allows for open-loop driving through
the use of internally-generated PWM.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (MAX)
DRV2604L
DSBGA (9)
1.50 mm × 1.50 mm
DRV2604L
VSSOP (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VDD
Supply
correction
RAM
Gate
drive
OUT+
SDA
SCL
EN
IN/TRIG
REG
I²C I/F
REG
Control and
playback
engine
Back-EMF
detection
Gate
drive
LRA
M or
ERM
OUT±
GND
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.