DRV2603 Datasheet, PDF (1/7 Pages) Texas Instruments – Haptic Driver with Auto Resonance Tracking for Linear Resonance Actuators (LRA) and Optimized Drive for Eccentric Rotating Mass Actuators (ERM)

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DRV2603
SLOS786 – APRIL 2012
Haptic Driver with Auto Resonance Tracking for Linear Resonance Actuators (LRA) and
Optimized Drive for Eccentric Rotating Mass Actuators (ERM)
Check for Samples: DRV2603
FEATURES
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• Flexible Haptic/Vibra Driver
– LRA (Linear Resonance Actuator)
– ERM (Eccentric Rotating Mass)
• Auto Resonance Tracking for LRA
– No Frequency Calibration Required
– Automatic Drive Commutation
– Automatic Braking Algorithm
– Wide Input PWM Frequency Range
• Constant Vibration Strength Over Supply
• Automatic Input Level Translation
• 0% to 100% Duty Cycle Control Range
• Fast Start Up Time
• Differential Drive from Single-Ended Input
• Wide Supply Voltage Range of 2.5 V to 5.2 V
• 1.8 V Compatible, 5 V Tolerant Digital Pins
• Available in a 2 mm × 2 mm × 0.75 mm
leadless QFN package (RUN)
APPLICATIONS
• Mobile Phones
• Tablets
• Touch Enabled Devices
DESCRIPTION
The DRV2603 is a haptic driver designed specifically
to solve common obstacles in driving both Linear
Resonance Actuator (LRA) and Eccentric Rotating
Mass (ERM) haptic elements. The DRV2603 is also
designed for low latency, has excellent efficiency, and
plenty of drive strength for actuators commonly used
in the portable market.
LRA actuators typically have a narrow frequency
band over which they have an adequate haptic
response. This frequency window is typically ±2.5 Hz
wide or less, so driving an LRA actuator presents a
challenge. The DRV2603 solves this problem by
employing auto resonance tracking, which
automatically detects and tracks the optimum
commutation frequency. This means that any input
PWM frequency within the input range (10 kHz to 250
kHz) will automatically produce the correct resonant
output frequency. As an additional benefit, the
DRV2603 implements an optimal braking algorithm to
stop the LRA from ringing out, leaving the user with a
crisp haptic sensation.
For both ERM and LRA actuators, the DRV2603
automatic input level translation solves issues with
low voltage PWM sources without adding additional
external components, so if the digital I/O levels vary,
the output voltage does not change. The DRV2603
also has supply correction that ensures no supply
regulation is required for constant vibration strength,
allowing an efficient, direct-battery connection.
2.5 V – 5.2 V
VDD
EN
LRA / ERM
PWM
Supply
Correction
Level
Correction
DRV2603
VDD
Gate
Drive
Control
Engine
Back-EMF
Detection
Gate
Drive
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.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2012, Texas Instruments Incorporated