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 library playback 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 Noticesection.
Flexible Haptic and Vibration Driver
LRA (Linear Resonance Actuator)
ERM (Eccentric Rotating Mass)
I2C-Controlled Digital Playback Engine
Waveform Sequencer and Trigger
Real-Time Playback Mode through I2C
I2C Dual-Mode Drive (Open and Closed Loop)
Automatic Overdrive and Braking
Automatic Resonance Tracking and Reporting (LRA Only)
Automatic Actuator Diagnostic
Automatic Level Calibration
Wide Support for Actuator Models
Licensed Immersion TouchSense® 2200 features:
Integrated Immersion Effect Library
Drive Compensation Over Battery Discharge
Wide Voltage Operation (2 V to 5.2 V)
Efficient Differential Switching Output Drive
PWM Input With 0% to 100% Duty-Cycle Control Range