• Integrated Digital Front End
  • Up to 400-kHz I2C Bus Control
  • 100-Byte Internal FIFO Interface
  • Immersion TS5000-Compliant
  • Optional Analog Inputs
• High Voltage Piezo-Haptic Driver
  • Drives up to 100 nF at 200 VPP and 300 Hz
  • Drives up to 150 nF at 150 VPP and 300 Hz
  • Drives up to 330 nF at 100 VPP and 300 Hz
  • Drives up to 680 nF at 50 VPP and 300 Hz
  • Differential Output
• 105-V Integrated Boost Converter
  • Adjustable Boost Voltage
  • Adjustable Boost Current Limit
  • Integrated Power FET and Diode
  • No Transformer Required
• 2-ms Fast Start Up Time
• 3- to 5.5-V Wide Supply Voltage Range
• 1.8-V Compatible, VDD Tolerant Digital Pins

• Mobile Phones
• Tablets
• Portable Computers
• Keyboards and Mice
• Electronic Gaming
• Touch Enabled Devices

The DRV2665 device 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 through the analog inputs.

The digital interface of the DRV2665 device is available through an I2C compatible bus. A digital interface relieves the costly processor burden of the 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 start-up procedure. When the data flow stops or the FIFO under-runs, the DRV2665 device will automatically enter a pop-less shutdown procedure.

The boost voltage is set using two external resistors, and the boost current limit is programmable through the REXT resistor. A typical start-up time of 2 ms makes the DRV2665 device an ideal piezo driver for fast haptic responses. Thermal overload protection prevents the device from being damaged when overdriven.