Introduction
NCV70501 is a micro−stepping stepper motor driver for bipolar stepper motors. The chip is connected through I/O pins and an SPI interface with an external microcontroller. The NCV70501 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 an error message if stall, an electrical error or an elevated junction temperature is detected. It is using a proprietary PWM algorithm for reliable current control.
NCV70501 is fully compatible with the automotive voltage requirements and is ideally suited for general−purpose low current range stepper motor applications in the automotive, industrial, medical, and marine environment.

FEATUREs
• Dual H−Bridge for 2−Phase Stepper Motors
• Programmable Peak−Current Up to 300 mA
• On−Chip Current Translator
• SPI Interface With Daisy Chain Capability
• 6 Step Modes from Full−Step up to 16 Micro−Steps
• Fully Integrated Current−Sensing and Current−Regulation
• On Chip Stall Detection
• PWM Current Control with Automatic Selection of Fast and Slow
   Decay
• Fixed PWM Frequency
• Active Fly−Back Diodes
• Full Output Protection and Diagnosis
• Thermal (Warning and) Shutdown
• Compatible with 3.3 V Microcontrollers, 5 V Tolerant Inputs, 5 V
   Tolerant Open Drain Outputs
• Reset Function
• NCV Prefix for Automotive and Other Applications Requiring
   Unique Site and Control Change Requirements; AEC−Q100
   Qualified and PPAP Capable
• These Devices are Pb−Free and are RoHS Compliant