DRV2667
www.ti.com
SLOS807 –JANUARY 2013
Piezo Haptic Driver with Boost, Digital Front End, and Internal Waveform Memory
Check for Samples: DRV2667
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FEATURES
DESCRIPTION
The DRV2667 is a piezo haptic driver with integrated
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Integrated Digital Front End
105 boost switch, integrated power diode,
V
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I2C Bus Control up to 400 kHz
Advanced Waveform Synthesizer
2 kB Internal Waveform Memory
Internal 100 Byte FIFO Interface
Immersion TS5000 Compliant
Optional Analog Inputs
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 over the I2C
port or the analog inputs.
The DRV2667 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 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.
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High Voltage Piezo-Haptic Driver
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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
The DRV2667 also includes deep volatile waveform
memory to store and recall waveforms with minimal
latency as well as an advanced waveform synthesizer
to construct complex haptic waveforms with minimal
memory usage. This provide a means of hardware
acceleration, relieving the host processor of haptic
generation duties as well as minimizing bus traffic
over the haptic interface.
Integrated 105 V Boost Converter
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Adjustable Boost Voltage
Adjustable Boost Current Limit
Integrated Power FET and Diode
No Transformer Required
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Fast Start Up Time of 2 ms (typical)
Wide Supply Voltage Range of 3 V to 5.5 V
1.8 V Compatible, VDD Tolerant Digital Pins
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 DRV2667 an ideal piezo driver for fast haptic
responses. Thermal overload protection prevents the
device from being damaged when overdriven.
Available in a 4 mm × 4 mm × 0.9 mm QFN
package (RGP)
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Pin-Similar with DRV8662 and Pin-Compatible
with DRV2665
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APPLICATIONS
L1
3 V to 5.5 V
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Mobile Phones
DRV2667
CVDD
Tablets
VDD
SW
VBST
PVDD
Portable Computers
Keyboards and Mice
Electronic Gaming
Touch Enabled Devices
VREG
CVBST
CVREG
R 1
R 2
RPU RPU
FB
SDA
SCL
I2C
IN+
IN-
OUT+
OUT-
Analog
Input
Piezo
Actuator
VPUMP
REXT
REXT
CPUMP
GND
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated