ULN2003PW High-Voltage, High-Current Darlington Transistor Array

The ULN2003PW from STMicroelectronics is a robust, high-voltage, and high-current Darlington transistor array designed to efficiently drive a wide range of loads, including solenoids, relays, DC motors, LED displays, and incandescent lamps. This integrated circuit is part of the ULN200x series and is specifically engineered to interface with standard TTL and CMOS logic levels, making it an ideal choice for use in microcontroller-based applications and various control systems.

Encased in a TSSOP-16 package, the ULN2003PW features seven NPN Darlington pairs that can handle a continuous collector current of 500 mA per channel. Each pair is rated for a collector-emitter voltage of 50V, ensuring compatibility with higher voltage applications. The chip's high current gain allows for direct operation from logic drivers, reducing component count and simplifying circuit design.

The Darlington pairs in ULN2003PW are equipped with integral suppression diodes for inductive loads, providing built-in transient protection and eliminating the need for external diode components when driving coils or other inductive elements. This feature significantly simplifies PCB layout and reduces the risk of damage due to voltage spikes, enhancing the overall reliability of the system.

Key features of the ULN2003PW include:

• Seven Darlington pairs per package
• Output current 500 mA per driver (600 mA peak)
• Output voltage 50V
• Input compatible with various types of logic, including 5V TTL and CMOS
• Built-in suppression diodes for inductive load driving
• Common-cathode clamp diodes for switching inductive loads
• Collector-current rating of single output 500 mA

This versatile component is perfect for designers who require a reliable and efficient solution for driving high-power loads in their electronic designs. The ULN2003PW's combination of high-voltage and high-current capabilities, along with its ease of interfacing with control logic, makes it a widely favored choice in the industry for applications such as stepper motor drivers, LED displays, and other power-intensive applications.

STMicroelectronics provides comprehensive technical support, including datasheets, reference designs, and application notes, ensuring that integrating the ULN2003PW into your design is as smooth and efficient as possible.