Description: 1. ULN2003 is a 7214A based 8-channel stepper motor driver capable of driving 1A per channel at 12V. It is a low cost, easy-to-use solution for controlling 2-phase or 4-phase stepper motors. 2. Features: This driver offers eight independent output channels, each with adjustable current limiting, reversing polarity, and open drain or push-pull output options. It operates in full bridge or half bridge configurations. 3. Applications: Common applications for ULN2003 include CNC machines, 3D printers, robotics, automation systems, and other projects requiring precise motor control. 4. Ease of Use: With a simple interface, no external drivers or microcontrollers are needed to operate the motor. Instead, simply connect power, ground, and each stepper motor wire to their respective channels. 5. Flexibility: The ULN2003 allows users to choose between various connection modes for driving their motors (unipolar or bipolar). This flexibility makes it suitable for a wide range of applications
| Specification | Details |
|---|---|
| Chip Type | ULN2003A |
| Voltage Rating | 12V to 30V (5.5V to 28V with thermal shutdown) |
| Current Rating | Up to 500mA per channel (1A peak) |
| Power Dissipation | 2W (maximum) |
| Operating Frequency | Up to 100 kHz |
| Step Mode Operation | Yes with 4-phase full-bridge driver |
| Logic Voltage | 3V to 15V |
| Package | SO8 (small outline) |
| Thermal Shutdown | Yes at approximately 140°C |
| Mounting | Surface mountable |
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