DRV2700 DRV2700 High Voltage Driver with Integrated Boost Converter | TI.com

DRV2700
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DRV2700 High Voltage Driver with Integrated Boost Converter

 

Description

The DRV2700 device is a single-chip piezo driver 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.

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 based on a hysteretic architecture to minimize 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.

Features

  • 100-V Boost or 1-kV Flyback Configuration
  • ±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
    • 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
  • 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

Parametrics

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Part number Order Haptic actuator type Input signal Vout (Max) (V p-p) Vs (Max) (V) Vs (Min) (V) Iq (Typ) (mA) Shutdown current (uA) Startup time (ms) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
DRV2700 Order now Piezo     PWM, Analog     200     5.5     3     24     13     1.5     -40 to 85     QFN | 20     20QFN: 16 mm2: 4 x 4 (QFN | 20)