Introduction
The NCV70522MN 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 NCV70522MN features an internal current−translation table: it takes the next micro−step depending on the clock signal on the stepping input pin (NXT) and the status of the direction register or input pin (DIR). A reliable current control is achieved using an integrated proprietary PWM algorithm.

FEATUREs
• Dual H−Bridge for 2 Phase Stepper Motors
• Programmable Peak−Current up to 1.2 A Continuous (1.5 A Short
   Time), Using a 5−Bit Current DAC
• On−Chip Current Translator
• SPI Interface
• Speed and Load−Angle Output
• 7 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
• Digital IO’s Compatible with 5 V and 3.3 V Microcontrollers
• Integrated 5 V Voltage Regulator to Supply an External
   Microcontroller
• Integrated Reset Function to Reset External Microcontroller
• Integrated Watchdog Function
• NCV Prefix for Automotive and Other Applications Requiring
   Unique Site and Control Change Requirements; AEC−Q100
   Qualified and PPAP Capable
• These are Pb−Free Devices*