1 Features

• 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

• 3.3- to 5.5-V Wide Supply Voltage Range

• 1.8-V Compatible, VDD Tolerant Digital Pins

2 Applications

• Mobile Phones

• Tablets

• Portable Computers

• Keyboards and Mice

• Electronic Gaming

• Touch Enabled Devices

3 Description

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.