STMicroelectronics

ULN2804A

ULN2804A Description

The ULN2804A is a high-performance, 8 NPN Darlington transistor array manufactured by STMicroelectronics. This through-hole mounted component is designed for applications requiring high current and voltage handling capabilities. With a maximum collector current of 500mA and a collector-emitter breakdown voltage of 50V, the ULN2804A is well-suited for various power switching and amplification tasks.

ULN2804A Features

• High Current and Voltage Handling: The ULN2804A can handle a maximum collector current of 500mA and a collector-emitter breakdown voltage of 50V, making it suitable for high-power applications.
• Low Saturation Voltage: With a Vce saturation voltage of 1.6V at 500µA and 350mA, the ULN2804A offers low power dissipation and high efficiency in saturated conditions.
• High DC Current Gain: The minimum DC current gain (hFE) of 1000 at 350mA and 2V ensures reliable switching and amplification performance.
• RoHS Compliance: The ULN2804A is compliant with the RoHS3 directive, making it an environmentally friendly choice for electronic designs.
• Moisture Sensitivity Level 1: The ULN2804A has a moisture sensitivity level of 1, indicating that it can be stored and handled without special precautions for an unlimited period.

ULN2804A Applications

The ULN2804A is ideal for various applications where high current and voltage handling are required, including:

1. Power Switching: The ULN2804A's high current and voltage ratings make it suitable for power switching applications in motor control, relay drivers, and power distribution systems.
2. Amplification: The high DC current gain and low saturation voltage of the ULN2804A make it an excellent choice for audio and signal amplification applications.
3. Automotive Electronics: The ULN2804A's robust performance characteristics make it suitable for use in automotive electronics, such as power windows, seat controls, and lighting systems.
4. Industrial Control: The ULN2804A can be used in industrial control systems for motor control, sensor interfacing, and signal processing applications.

Conclusion of ULN2804A

The ULN2804A from STMicroelectronics is a versatile and high-performance 8 NPN Darlington transistor array that offers a combination of high current and voltage handling capabilities, low saturation voltage, and RoHS compliance. Its unique features and advantages make it an ideal choice for a wide range of applications, including power switching, amplification, automotive electronics, and industrial control systems. With its robust performance and reliability, the ULN2804A is a valuable addition to any electronic design requiring high-power handling and switching capabilities.