Smart stepper motor drivers

17 February 2010 Power Electronics / Power Management

New from ON Semiconductor are two driver ICs for driving high-current stepper motors. The AMIS-30532 and AMIS-30542 micro-stepping motor drivers have integrated H-bridges and are suitable 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 ICs deliver maximum current outputs of 2,2 A continuous and 5,0 A peak. Each device integrates smart motor control capability with voltage regulation, onboard current sensing and a number of protection and diagnostic functions. Each chip provides speed and load-angle output, which allows for the accurate control of motor torque and speed as well as the creation of stall detection algorithms. Seven step modes can be configured, from full step to 32 micro-steps.

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