Texas Instruments DRV2700 is a single-chip piezo driver with integrated 105V boost switch, integrated power diode and integrated fully differential amplifier.
This versatile device is capable of driving high and low voltage piezoelectric loads. The input signal can be differential or single-ended and can be 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 via the R (REXT) resistor. The boost converter architecture does not allow the demand for 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 required performance requirements. In addition, the boost converter is based on a hysteretic architecture, which minimizes switching losses and improves efficiency.
The typical 1.5ms startup time makes the DRV2700 device an ideal piezo driver that can quickly go to sleep. The company said that thermal overload protection protects the device from damage during overdrive.
