AMIS-30511

AMIS-30511 Micro-Stepping Motor Driver Introduction The AMIS−30511 is a micro−stepping stepper motor driver for bipolar stepper motors. The chip is connected through I/O pins and a SPI interface with an external microcontroller. The AMIS−30511 contains a current−translation table and takes the next micro−step depending on the clock signal on the “NXT” input pin and the status of the “DIR” (=direction) register or input pin. The chip provides a so−called “speed and load angle” output. This allows the creation of stall detection algorithms, step loss detection, and control loops based on load−angle to adjust torque and speed. It is using a proprietary PWM algorithm for reliable current control. The AMIS−30511 is implemented in I2T100 technology, enabling both high−voltage analog circuitry and digital functionality on the same chip. The chip is fully compatible with the automotive voltage requirements. The AMIS−30511 is ideally suited for general−purpose stepper motor applications in the automotive, industrial, medical, and marine environment. Key Features http://onsemi.com PIN ASSIGNMENT DO VDD GND DI CLK NXT DIR ERR SLA CPN CPP VCP TSTO VBB MOTXP GND MOTXN MOTYN GND MOTYP VBB CS CLR AMIS30511 DAC On−chip Current Translator SPI Interface Speed and Load Angle Output Seven Step Modes from Full−step up to 32 Micro−steps Fully Integrated Current−sense PWM Current Control with Automatic Selection of Fast and Slow www.DataSheet4U.com Decay Low EMC PWM with Selectab...