The DRV2604L device is a low-voltage
haptic driver that
provides a closed-loop
actuator-control system for high-quality tactile 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 DRV2604L device includes enough
integrated RAM to allow the user to pre-load over 100 customized smart-loop architecture waveforms.
These waveforms can be instantly played back through I2C or optionally
triggered through a hardware trigger terminal.
Additionally, the real-time playback mode
allows the host processor to bypass the memory playback engine and play waveforms directly from the host
The smart-loop architecture inside the DRV2604L device allows simple
auto-resonant drive for the LRA as well as feedback-optimized ERM drive allowing for automatic
overdrive and braking. The smart-loop architecture creates a simplified input waveform interface as
well as reliable motor control and consistent motor performance.
The DRV2604L 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
DRV2604L device automatically synchronizes with the LRA. The
DRV2604L also allows for open-loop driving through the use of
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