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DRV2667

更新时间： 2024-11-05 12:30:23
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德州仪器 - TI 驱动器存储
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6页 218K
描述
Piezo Haptic Driver with Boost, Digital Front End, and Internal Waveform Memory

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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 boost switch, integrated power diode,  
V
–
–
–
–
–
–
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.  
•
•
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  
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  
–
–
–
–
Adjustable Boost Voltage  
Adjustable Boost Current Limit  
Integrated Power FET and Diode  
No Transformer Required  
•
•
•
•
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)  
•
Pin-Similar with DRV8662 and Pin-Compatible  
with DRV2665  
__  
APPLICATIONS  
L1  
3 V to 5.5 V  
•
•
•
•
•
•
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  
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.  
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  
123456

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