SLOA194A May 2014 – January 2022 DRV2603 , DRV2604 , DRV2604L , DRV2605 , DRV2605L , DRV2605L-Q1 , DRV2624 , DRV2625 , DRV2667
This section describes the energy consumption during each haptic event. The energy consumption for clicks, buzzes, and alerts can be measured in µA-hour and mA-hour.
For the ERM in Figure 2-1, the click duration is 50 ms. The energy consumption of the ERM click can be calculated using the following equation:
Using the previous equation, the energy consumption of an LRA click is 0.57 µAh and for Piezo, the energy consumption is 0.34 µAh.Click | VDD (V) | Mean Current (mA) | Time Window (ms) | Energy (μAh per Click) |
---|---|---|---|---|
ERM | 5 | 124 | 50 | 1.72 |
LRA | 5 | 52.6 | 40 | 0.58 |
Piezo | 5 | 62.6 | 19.61 | 0.34 |