The DRV2665 is a piezo haptic driver with integrated 105 V boost switch, integrated power diode, integrated fully-differential amplifier, and integrated digital front end. This versatile device is capable of driving both high-voltage and low-voltage piezo haptic actuators. The input signal can be driven as haptic packets over the I2C port or via the analog inputs.
The DRV2665 digital interface is available via an I2C compatible bus. A digital interface relieves the costly processor burden of PWM generation or additional analog channel requirements in the host system. Any writes to the internal first-in, first-out buffer (FIFO) will automatically wake up the device and begin playing the waveform after the 2 ms internal startup procedure. When the data flow stops or the FIFO under-runs, the DRV2665 will automatically enter a pop-less shutdown procedure.
The boost voltage is set using two external resistors, and the boost current limit is programmable via the REXT resistor. A typical start-up time of 2 ms makes the DRV2665 an ideal piezo driver for fast haptic responses. Thermal overload protection prevents the device from being damaged when overdriven.
