Description ULN2003 NPN Darlington Transistor Array IC – High Voltage & Current Driver Module Overview: The ULN2003 is a robust and versatile high-voltage, high-current Darlington transistor array. With its 7 NPN Darlington pairs, this IC is perfect for driving inductive loads, such as motors, relays, and LEDs. Featuring built-in clamp diodes, it ensures safe and efficient operation in various stepper motor control and logic circuit applications. Key Features: Seven NPN Darlington Transistor Arrays for high-current switching. Output Current: Up to 500mA per driver (600mA peak). Output Voltage: Supports up to 50V (ideal for inductive loads). Integrated Suppression Diodes for inductive load protection. Logic Control Voltage: Compatible with TTL/CMOS/PMOS/DTL inputs. Parallel Output Capability for higher current applications. Temperature Range: Storage: -55°C to 150°C Operating: -25°C to 90°C Flyback Diode Protection to safeguard against voltage spikes. Compact Design: Inputs are pinned opposite outputs for simplified PCB layout. Specifications: Maximum Input Voltage: 30V Maximum Output Voltage: 50V Rated Collector Current (Single Output): 500mA Motor Supply Voltage: 5-15V Logic Control Voltage: 3-5.5V Operating Frequency Range: Optimized for stepper motor control. Includes a flyback diode for added protection against inductive voltage surges. What is a Darlington Transistor? A Darlington transistor, also called a Darlington pair, is a compound structure of two BJTs (Bipolar Junction Transistors) that amplifies current. The current is first amplified by one transistor and then further amplified by the second, achieving extremely high current gain. This design makes the Darlington transistor highly efficient in driving loads requiring significant current. The ULN2003 simplifies this functionality into a single IC, making it ideal for projects involving motors and relays. Applications: Stepper motor control. Relay driving circuits. LED arrays and lighting systems. Solenoid operation. Inductive load switching. Package Includes: 1 x ULN2003 NPN Darlington IC
