SLOA198A September 2014 – December 2021 DRV2665 , DRV2667 , DRV2700 , DRV8662
The DRV8662, DRV2700, DRV2665, and DRV2667 are high-voltage, Piezo drivers each with an integrated boost converter and amplifier. The integrated high-voltage solution eliminates design complexities and reduces the overall solution size for driving Piezos.
These devices have been designed for simplicity and are easy to configure; however, there are some common design issues that should be avoided. This application note discusses boost converter basics, hysteretic boost operation, and describes the proper steps for configuring the boost converter including calculating the load requirements, selecting the inductor, current limit resistor, input capacitor, and output capacitor.