The NCV70514 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 NCV70514 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, an under−voltage or an elevated junctiontemperature is detected. It is using a proprietary PWM algorithm for reliable current control.NCV70514 is fully compatible with the automotive voltage requirements and is ideally suited for general−purpose stepper motor applications in the automotive, industrial, medical, and marine environment.Due to the technology, the device is especially suited for use in applications with fluctuating battery supplies.

• Dual H−bridge for 2−phase Stepper Motors
• Programmable Peak−current up to 800 mA
• On−chip Current Translator
• SPI Interface with Daisy Chain Capability
• 7 Step Modes from Full−step up to 32 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
• Overcurrent Protection
• Enhanced Under Voltage Management
• Step Mode Selection Inputs
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant