SLOA207A November   2014  – November 2021 DRV2603 , DRV2604 , DRV2604L , DRV2605 , DRV2605L , DRV2624 , DRV2625

 

  1.   Trademarks
  2. 1Introduction
  3. 2Actuator Description
    1. 2.1 Eccentric Rotating-Mass (ERM) Actuators
    2. 2.2 Brush-Less Direct Current (BLDC) Actuator Module
    3. 2.3 Linear Resonance Actuators (LRA)
  4. 3Design Considerations
    1. 3.1 Braking
    2. 3.2 Overdrive
    3. 3.3 Headroom
    4. 3.4 Resonance Tracking for LRA
    5. 3.5 Power Consumption
  5. 4Actuator Comparison
  6. 5Revision History

1 Introduction

Haptics and vibration effects are relatively new features being implemented in a growing number of mobile and wearable devices. Given the unique needs of mobile and wearables devices in terms of power consumption, form factor and haptic/vibration performance, selection of the optimum haptic solution may differ from other consumer products. Among the alternatives, there are mainly three types of actuators available: LRA, ERM, and BLDC actuators. Each of the actuator types offer different trade-offs in terms of power consumption, vibration strength, and form factor. The following sections expand on the trade-off among different actuators and circuit implementation.