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


The actuator's vibration strength is proportional to the driving signal. Therefore, the supply voltage sets a limit for maximum vibrations on a particular system. For LRA actuators in particular, a differential output is recommended in order to maximize the vibration strength. If using a typical Li-Ion battery, a single ended solution (such as that obtained by a single FET implementation) will be limited to the voltage of the battery, which will make waveforms such as the one shown in Figure 3-1 not possible to obtain.