C

VBST

VDD

VREG

SDA

SCL

IN+

IN-

VPUMP

GND

SW

VBST

PVDD

FB

OUT+

OUT-

REXT

L1

I2C

Analog

Input

R 1

R 2

Piezo

Actuator

3 V to 5.5 V

C

VDD

R

PU

R

PU

C

VREG

C

PUMP

R

EXT

DRV2667

DRV2667

www.ti.com

SLOS807 – JANUARY 2013

Piezo Haptic Driver with Boost, Digital Front End, and Internal Waveform Memory

Check for Samples: DRV2667

1

FEATURES

DESCRIPTION

The DRV2667 is a piezo haptic driver with integrated

•

Integrated Digital Front End

105

V

boost

switch,

integrated

power

diode,

–

integrated fully-differential amplifier, and integrated

–

Advanced Waveform Synthesizer

digital front end. This versatile device is capable of

driving both high-voltage and low-voltage piezo haptic

–

2 kB Internal Waveform Memory

–

Internal 100 Byte FIFO Interface

port or the analog inputs.

–

Immersion TS5000 Compliant

–

Optional Analog Inputs

compatible bus. A digital interface relieves the costly

•

High Voltage Piezo-Haptic Driver

processor burden of PWM generation or additional

analog channel requirements in the host system. Any

–

writes to the internal 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 DRV2667 will

–

automatically enter a pop-less shutdown procedure.

–

Differential Output

The DRV2667 also includes deep volatile waveform

•

Integrated 105 V Boost Converter

memory to store and recall waveforms with minimal

–

Adjustable Boost Voltage

latency as well as an advanced waveform synthesizer

–

Adjustable Boost Current Limit

to construct complex haptic waveforms with minimal

memory usage. This provide a means of hardware

–

Integrated Power FET and Diode

acceleration, relieving the host processor of haptic

–

No Transformer Required

generation duties as well as minimizing bus traffic

•

Fast Start Up Time of 2 ms (typical)

over the haptic interface.

•

Wide Supply Voltage Range of 3 V to 5.5 V

The boost voltage is set using two external resistors,

•

1.8 V Compatible, VDD Tolerant Digital Pins

and the boost current limit is programmable via the

•

Available in a 4 mm × 4 mm × 0.9 mm QFN

the DRV2667 an ideal piezo driver for fast haptic

package (RGP)

responses. Thermal overload protection prevents the

•

Pin-Similar with DRV8662 and Pin-Compatible

device from being damaged when overdriven.

with DRV2665

__

APPLICATIONS

•

Mobile Phones

•

Tablets

•

Portable Computers

•

Keyboards and Mice

•

Electronic Gaming

•

Touch Enabled Devices

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.