AMIS-30522 Datasheet | AMI SEMICONDUCTOR

AMIS-30522 Micro-stepping Motor Driver Data Sheet 1.0 Introduction The AMIS-30522 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. It has an on-chip voltage regulator, reset-output and watchdog reset, able to supply peripheral devices. AMIS-30522 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 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-30522 is implemented in I2T100 technology, enabling both high-voltage analog circuitry and digital functionality on the same chip. The chip is fully patible with the automotive voltage requirements. The AMIS-30522 is ideally suited for general-purpose stepper motor applications in the automotive, industrial, medical, and marine environment. With the on-chip voltage regulator it further reduces the BOM for mechatronic stepper applications. 2.0 Key Features - Dual H-Bridge for 2-phase stepper motors - Programmable peak-current up to 1.6A using a 5-bit current 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 decay - Low EMC PWM with selectable voltage slopes - Active fly-back diodes - Full output protection and diagnosis - Thermal warning and shutdown - patible with 5V and 3.3V microcontrollers - Integrated 5V regulator to supply external microcontroller - Integrated reset function to reset external microcontroller .. - Integrated watchdog function 3.0 Ordering...