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  • DRV2603 Haptic Drive With Auto-Resonance Detection for Linear Resonance Actuators (LRA)

    • SLOS754C June   2012  – August 2016 DRV2603

      PRODUCTION DATA.  

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  • DRV2603 Haptic Drive With Auto-Resonance Detection for Linear Resonance Actuators (LRA)
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Test Setup for Graphs
    2. 7.2 Alternate Test Setup
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Supply Voltage Rejection for Constant Vibration Strength
      2. 8.3.2 Low-Voltage Control Logic for Constant Vibration Strength
      3. 8.3.3 Thermal Protection
      4. 8.3.4 Overcurrent Protection
      5. 8.3.5 Linear Resonance Actuators (LRA)
      6. 8.3.6 Auto Resonance Engine for LRA
      7. 8.3.7 Eccentric Rotating Mass Motors (ERM)
      8. 8.3.8 Edge Rate Control
    4. 8.4 Device Functional Modes
      1. 8.4.1 LRA Mode
      2. 8.4.2 ERM Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Actuator Selection
        2. 9.2.2.2 Power Supply Selection
        3. 9.2.2.3 Sending a Haptic Effect
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Decoupling Capacitor
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

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DATA SHEET

DRV2603 Haptic Drive With Auto-Resonance Detection for Linear Resonance Actuators (LRA)

1 Features

  • 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
  • Immersion TouchSense® 3000 Compatible
  • 1.8-V Compatible, 5-V Tolerant Digital Pins
  • Available in a 2 mm × 2 mm × 0.75 mm Leadless QFN Package (RUN)

2 Applications

  • Mobile Phones and Tablets
  • Watches and Wearable Technology
  • Remote Controls, Mice, and Peripheral Devices
  • Electronic Point of Sale (ePOS)
  • Vibration Alerts and Notifications
  • Touch-Enabled Devices
  • Industrial Human-Machine Interfaces

3 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 designed for low latency, high efficiency, and more drive strength for actuators commonly used for tactile feedback 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 LRA resonant frequency in real time. 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 automatic braking algorithm to prevent LRA ringing at the end of waveforms, leaving the user with a crisp haptic sensation.

For both ERM and LRA actuators, the 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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DRV2603 WQFN (10) 2.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

DRV2603 Block Diagram

DRV2603 fbd_slos754.gif

4 Revision History

Changes from B Revision (September 2015) to C Revision

  • Auto Resonance Engine for LRA, changed text From: "tracking range for LRA devices is 140 Hz to 140 Hz" To: "tracking range for LRA devices is 140 Hz to 220 Hz."Go

Changes from A Revision (January 2014) to B Revision

  • Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from * Revision (June 2012) to A Revision

  • Changed from 1 page data sheet to full data sheet in product folderGo

5 Pin Configuration and Functions

RUN Package
10-Pin WQFN
Top View
DRV2603 po_los754.gif

Pin Functions

PIN I/O/P(1) DESCRIPTION
NAME NO.
EN 1 I Device enable
GND 5, 8, 10 P Supply ground
LRA/ERM 3 I Mode selection. ERM = Low, LRA = High
NC 4 I No Connection
OUT+ 9 O Positive haptic driver differential output
OUT– 6 O Negative haptic driver differential output
PWM 2 I Input signal
VDD 7 P Supply Input (2.5 V to 5.5 V)
(1) I = Input, O = Output, P = Power

6 Specifications

6.1 Absolute Maximum Ratings(1)

over operating free-air temperature range, TA = 25°C (unless otherwise noted)
MIN MAX UNIT
Supply voltage VDD –0.3 6 V
VI Input voltage EN, PWM, LRA/ERM –0.3 VDD + 0.3 V
TA Operating free-air temperature range –40 85 °C
TJ Operating junction temperature range –40 150 °C
Tstg Storage temperature range –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN TYP MAX UNIT
VDD Supply voltage VDD 2.5 5.2 V
fPWM PWM Input frequency 10 250 kHz
RL Load Impedance VDD = 5.2 V 8 Ω
F0 Supported LRA frequency Auto resonance tracking range for LRA 140 220 Hz
VIL Digital input low voltage EN, PWM, LRA/ERM 0.6 V
VIH Digital input high voltage EN, PWM, LRA/ERM 1.2 V
TA Operating free-air temperature range -40 85 °C

6.4 Thermal Information

THERMAL METRIC(1) DRV2603 UNIT
RUN (WQFN)
10 PINS
RθJA Junction-to-ambient thermal resistance 153.7 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 86 °C/W
RθJB Junction-to-board thermal resistance 70.4 °C/W
ψJT Junction-to-top characterization parameter 1.3 °C/W
ψJB Junction-to-board characterization parameter 70.4 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

TA = 25°C, VDD = 3.6 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
|IIL| Digital input low current EN, PWM, LRA/ERM VDD = 5.0 V, VIN = 0 V 1 µA
|IIH| Digital input high current EN VDD = 5.0 V, VIN = VDD 6 µA
PWM, LRA/ERM VDD = 5.0 V, VIN = VDD 3 µA
ISD Shut down current VEN = 0 V 0.3 3 µA
IDDQ Quiescent current VEN = VDD, ERM Mode, 50% duty cycle input, No load 1.7 2.5 mA
ROUT Output impedance in shutdown OUT+ to GND, OUT– to GND 15 kΩ
tSU Start-up time Time from EN high to output signal 1.3 ms
fSW PWM output frequency 19.5 20.3 21.5 kHz
IBAT,AVG Average battery current during operation Duty Cycle = 100%, LRA Mode, Load = 25 Ω LRA 55 mA
Duty Cycle = 80%, ERM Mode, RL = 17 Ω, 2V rated ERM 59
RDS-HS Drain to source resistance, high-side 1.05 Ω
RDS-LS Drain to source resistance, low-side 0.85 Ω
VOUT Differential output voltage Duty Cycle = 100%, LRA Mode, Load = 25 Ω LRA 2.2 VRMS
Duty Cycle = 100%, ERM Mode, RL = 20 Ω ERM 3.3 V
Thermal threshold 145 °C
Thermal Hysteresis 18 °C

6.6 Typical Characteristics

DRV2603 G001_Startup_Waveform.png Figure 1. Startup Waveform
DRV2603 G003_LRA_Click.png Figure 3. LRA Click
DRV2603 G005_LRA_PWM_Modulation.png Figure 5. LRA PWM Modulation
DRV2603 G002_LRA_Full-Scale_Drive.png Figure 2. LRA Full-Scale Drive
DRV2603 G004_ERM_Click.png Figure 4. ERM Click
DRV2603 G006_ERM_PWM_Modulation.png Figure 6. ERM PWM Modulation

 
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