The document introduces the LT3572 device produced by Linear Technology company. This is a dual full-bridge driver for piezo motors. The device uses a 4mm × 4mm QFN package, integrates a step-up regulator and a full-bridge driver, and can output up to 40V of drive voltage from a low input voltage (2.7V to 10V).
The LT3572 is a tiny dual full-bridge piezo motor driver that operates from a low input voltage. It combines a step-up regulator and a dual full-bridge driver in a compact 4mm x 4mm QFN package to solve high component count issues in camera designs.
The LT3572 is a dual full-bridge driver designed specifically to operate piezoelectric motors found in digital cameras.
The device can generate high output voltages from an input power source ranging between 2.7V and 10V.
A resistor, such as a 20Ω component, should be added between the driver and the motor to slow down driving speed.