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DRV2700RGPT

更新时间： 2024-11-06 01:08:35
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德州仪器 - TI /
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37页 1967K
描述
DRV2700 Industrial Piezo Driver With Integrated Boost Converter

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中文翻译

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Community  
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DRV2700  
SLOS861B –MARCH 2015–REVISED APRIL 2015  
DRV2700 Industrial Piezo Driver With Integrated Boost Converter  
1 Features  
3 Description  
The DRV2700 device is a single-chip piezo driver  
1
•
•
100-V Boost or 1-kV Flyback Configuration  
with an integrated 105-V boost switch, integrated  
power diode, and integrated fully-differential amplifier.  
This versatile device is capable of driving both high-  
voltage and low-voltage piezoelectric loads. The input  
signal can be either differential or single-ended and  
AC or DC coupled. The DRV2700 device supports  
four GPIO-controlled gains: 28.8 dB, 34.8 dB, 38.4  
dB, and 40.7 dB.  
±100-V Piezo Driver in Boost + Amplifier  
Configuration  
–
–
–
–
4 GPIO-Adjustable Gains  
Differential or Single-Ended Output  
Low-Voltage Control  
AC and DC Output Control  
•
•
0 to 1-kV Piezo Driver in Flyback Configuration  
The boost voltage is set using two external resistors.  
The boost current-limit is programmable through the  
R(REXT) resistor. The boost converter architecture  
does not allow the demand on the supply current to  
exceed the limit set by the R(REXT) resistor which  
allows the user to optimize the DRV2700 circuit for a  
given inductor based on the desired performance  
requirements. Additionally, this boost converter is  
–
–
Low-Voltage Control  
AC and DC Output Control  
Integrated Boost or Flyback Converter  
–
–
Adjustable Current-Limit  
Integrated Power FET and Diode  
•
•
•
•
•
Fast Startup Time of 1.5 ms  
based on  
a hysteretic architecture to minimize  
Wide Supply-Voltage Range of 3 to 5.5 V  
4-mm × 4-mm × 0.9-mm VQFN package  
1.8-V Compatible Digital Pins  
Thermal Protection  
switching losses and therefore increase efficiency.  
A typical startup time of 1.5 ms makes the DRV2700  
device an ideal piezo driver for coming out of sleep  
quickly. Thermal overload protection prevents the  
device from damage when overdriven.  
2 Applications  
Device Information(1)  
•
•
•
•
•
Piezo Positioning Actuators  
Piezo Sounder Driver  
Piezo Inkjet Printer  
DEVICE NAME  
DRV2700  
PACKAGE  
BODY SIZE (NOM)  
VQFN (20)  
4.00 mm × 4.00 mm  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
Piezo Transducers  
Piezoelectric Micropumps  
4 Boost + Amplifier Configuration  
L1  
C(VDD)  
SW  
V
DD  
BST  
C(BOOST)  
PUMP  
Charge  
R(FB1)  
Pump  
C(PUMP)  
Boost  
REXT  
Controller  
FB  
R(REXT)  
R(FB2)  
PVDD  
EN  
C(IN)  
IN+  
OUT+  
Piezo  
Element  
Gain  
IN±  
OUT±  
C(IN)  
GAIN0  
Thermal  
GAIN1  
Shutdown  
GND  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
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