DRV2605 Demonstration Program
2.2.3
Mode 3 – LRA Clicks
Mode 3 shows two different LRA click styles. Button 1 shoes a single sharp click and Button 2 shows a
click and release effect. The click and release effect provides a haptic waveform on both the button press
and the button release.
Figure 7. LRA SharpTick2_80 (Button 1)
Figure 8. LRA StrongClick 100 and Release SharpTick2
80 (Button 2)
2.2.4
Mode 2 – Alerts
Mode 2 showcases the advantages of the smart loop architecture, which includes auto-resonance
tracking, automatic overdrive, and automatic braking.
and
show the difference in acceleration when using LRA auto-resonance on and LRA
auto-resonance off. Notice that the acceleration is higher when driven at the resonant frequency. Also,
notice the start and stop time of the acceleration are much quicker when using the overdrive and braking
feature of the DRV2605.
Figure 9. LRA Auto-Resonance On (Button 1)
Figure 10. LRA Auto-Resonance Off (Button 2)
9
SLOU348B – January 2013 – Revised March 2014
DRV2605EVM-CT ERM and LRA Haptic Driver Evaluation Kit
Copyright © 2013–2014, Texas Instruments Incorporated