Dual Full-Bridge Piezo Driver with 900mA Boost Converter

The LT3572 is a highly integrated dual Piezo motor driver capable of driving two Piezo motors at up to 40V from a 5V supply. Each Piezo driver can be independently turned on or off along with the boost converter.

The boost regulator has a soft-start capability that limits the inrush current at start-up. The boost regulator switching frequency is set by an external resistor or the frequency can be synchronized by an external clock. A PGOOD pin indicates when the output of the boost converter is in regulation and the Piezo drivers are allowed to start switching.

The LT3572 is available in a (4mm × 4mm) 20-pin QFN package.

Applications

* Piezo Motor Drive

* 2.7V to 10V Input Voltage Range

* 900mA Boost Converter

* Dual Full-Bridge Piezo Drivers

* Programmable Switching Frequency from 500kHz to 2.25MHz

* Synchronizable Up to 2.5MHz

* Soft-Start

* Separate Enable for Each Piezo Driver and Boost Converter

* Available in a 4mm × 4mm 20-Pin QFN Package* AEC-Q100 Qualified for Automotive Applications