ON Semiconductor has announced two new highly integrated driver ICs that will drive high current motors with reduced component count and board space in stepper motor based applications. The new AMIS-30532 and AMIS-30542 micro-stepping stepper motor drivers have high current capabilities with integrated H-bridges and are ideal for motion control designs in automotive, industrial, office equipment, medical, security and marine applications.

Designed for use with two-phase stepper motors and a host microcontroller, the AMIS-30542 mixed-signal motor driver ICs provide high-accuracy and reliable motor control and deliver maximum current outputs of 2.2 ampere (A) continuous and 5.0 A peak. Each device integrates smart motor control capability with voltage regulation, on-board current sensing and a number of protection and diagnostic functions. This level of integration eliminates the need for external switches and sense resistors. The on board speed and load angle feedback allows removing expensive end of line switches and hall sensors on applications ranging from surveillance cameras, robotics to printers, industrial automation equipment and textile machines.

The new ICs feature two embedded H-bridges and connect to a host microcontroller via an SPI interface and dedicated I/O pins. Each chip provides speed and load-angle output, which allows for the accurate control of motor torque and speed.