SLOA194A May   2014  – January 2022 DRV2603 , DRV2604 , DRV2604L , DRV2605 , DRV2605L , DRV2605L-Q1 , DRV2624 , DRV2625 , DRV2667

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Eccentric Rotating Mass
    2. 1.2 Linear Resonant Actuator
    3. 1.3 Piezo Actuator
  3. 2How to Measure Energy
    1. 2.1 Current Consumption
    2. 2.2 Energy Consumption
    3. 2.3 Current Versus Acceleration
  4. 3Energy Consumption Comparisons for ERM, LRA and Piezo
  5. 4Energy Consumption Advantage of DRV260x and DRV262x Drivers
  6. 5Appendix A Energy Consumption of Actuators
  7. 6Appendix B. Test Setup Picture
  8. 7Appendix C. Energy Consumption Calculation for Smartphone Scenarios
  9. 8Revision History

Abstract

Many electronic products must interact with the user or operator to communicate. For the last 40 years, the main communication methods in electronics have been audible or visual feedback; their main language of communication is sound and light. Today, haptic feedback has become another way for electronics to communicate with human beings, using their sense of touch. Haptics can be used in consumer, industrial, and automotive applications, such as a smartphone, tablet, mouse, ATM machine, and automotive infotainment systems.

A smartphone, smart-watch, and fitness tracker are all portable battery-powered systems that can use haptics. Many engineers may be concerned with the energy consumption of haptics in battery critical applications. The DRV260x, DRV262x ERM/LRA Driver Families and the DRV2667 Piezo Driver enhance the user experience with haptics, while at the same time minimizing energy consumption.

This document introduces three types of actuator technologies, explains how to measure energy consumption, and compares each type of actuator.