Texas Instruments DRV2700 Industrial Piezo Driver

Texas Instruments DRV2700 Industrial Piezo Driver is a single-chip piezo driver with an integrated 105V 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 supports four GPIO-controlled gains: 28.8dB, 34.8dB, 38.4dB, and 40.7dB. 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 based on a hysteretic architecture to minimize switching losses and, therefore, increase efficiency.

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Features
100V Boost or 1kV Flyback Configuration
±100V 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 1kV Piezo Driver in Flyback Configuration
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 1.5ms
Wide Supply-Voltage Range of 3 to 5.5V
4mm×4mm×0.9mm VQFN package
1.8V Compatible Digital Pins
Thermal Protection

Applications
Piezo Positioning Actuators
Piezo Sounder Driver
Piezo Inkjet Printer
Piezo Transducers
Piezoelectric Micropumps


DRV2700EVM Evaluation Module (EVM)

Texas Instruments DRV2700EVM Evaluation Module (EVM) is an evaluation module for the DRV2700. The DRV2700 is intended for high voltage piezo applications typically used in industrial applications. The differential 200Vpp output capability, as well as the 100V single ended output, can be evaluated using this evaluation module. The available pin breakouts in addition with the on board MSP430 allows for prototyping into already existing systems.

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Features
5V input to +/-100V Differential Output
Single ended and differential input modes
Multiple boost voltage settings
Easily powered through USB or external Power Supply
Breakout for usage as a boost converter
Texas Instruments DRV2700EVM Evaluation Module (EVM)

Functional Block Diagram