TI DRV2665RGPR

The DRV2665 is a piezoelectric haptic driver featuring an integrated 105V 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 piezoelectric haptic actuators. Input signals can be provided as haptic data packets via the I2C port or through an analog input.

The digital interface of the DRV2665 is implemented via an I2C-compatible bus. In a host system, the digital interface reduces the burden on costly processors otherwise required for PWM generation or other analog channel requirements. Any write operation to the internal FIFO automatically wakes the device, which begins playing the waveform after a 2ms internal startup routine. When the data stream stops or the FIFO is emptied, the DRV2665 automatically enters a pop-free shutdown sequence.

The boost voltage is set via two external resistors, and the boost current limit is programmable through the R_EXT resistor. With a typical startup time of 2ms, the DRV2665 is an ideal piezoelectric driver for fast haptic response applications. The device features thermal overload protection to prevent damage under overdrive conditions.

• Integrated digital front end
• I2C bus control up to 400kHz
• 100-byte internal FIFO interface
• Compatible with Immersion TS5000
• Optional analog input
• High-voltage piezoelectric haptic driver
• Drives up to 100nF load at 200VPP and 300Hz
• Drives up to 150nF load at 150VPP and 300Hz
• Drives up to 330nF load at 100VPP and 300Hz
• Drives up to 680nF load at 50VPP and 300Hz
• Differential output
• 105V integrated boost converter
• Adjustable boost voltage
• Adjustable boost current limit
• Integrated power FET and diode
• No transformer required
• 2ms fast start-up time
• 3.3V to 5.5V wide supply voltage range
• 1.8V-compatible VDD tolerant digital pins

• Mobile phones
• Tablets
• Portable computers
• Keyboards and mice
• Computer games
• Touch-enabled devices