The DRV2605L device is a low-voltage haptic driver
which includes a haptic-effect library and provides a closed-loop actuator-control system for
high-quality haptic feedback for ERM and LRA. This schema helps improve actuator performance in
terms of acceleration consistency, start time, and brake time and is accessible through a shared
I2C compatible bus or PWM input signal.
The DRV2605L device offers a licensed
version of TouchSense 2200 software from Immersion which eliminates the need to design haptic
waveforms because the software includes over 100 licensed effects (6 ERM libraries and 1 LRA
library) and audio-to-vibe features.
Additionally, the real-time playback mode allows the host processor to bypass the
engine and play waveforms directly from the host through I2C.
The smart-loop architecture inside the DRV2605L device allows simple
auto-resonant drive for the LRA as well as feedback-optimized ERM drive allowing for automatic
overdrive and braking. This architecture creates a simplified input waveform interface as well as
reliable motor control and consistent motor performance. The DRV2605L device
also features automatic transition to an open-loop system in the event that an LRA actuator is not
generating a valid back-EMF voltage. When the LRA generates a valid back-EMF voltage, the
DRV2605L device automatically synchronizes with the LRA. The
DRV2605L also allows for open-loop driving through the use of
internally-generated PWM. Additionally, the audio-to-vibe mode
automatically converts an audio input signal to meaningful tactile effects.
For an important notice regarding Immersion software, see the Legal Notice
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