Allegro MicroSystems

UDN2981A  

Power Distribution Switches, Load Drivers

UDN2981A Description

The UDN2981A is a high-side bipolar power driver IC designed by Allegro MicroSystems, a leading manufacturer in the field of power management and integrated circuits. This IC is part of the Power Management (PMIC) category and is housed in a through-hole 18DIP package, making it suitable for a variety of industrial and commercial applications. Despite its obsolete product status, the UDN2981A remains a robust solution for driving high-current loads in a compact and efficient manner.

The UDN2981A features a bipolar output type with a high-side output configuration, enabling it to drive up to 500mA of current per channel. It operates within a load voltage range of 5V to 50V, making it versatile for various power requirements. The device does not require a supply voltage (Vcc/Vdd), which simplifies the power supply design. With a 1:1 input-to-output ratio, it ensures direct and efficient control of the connected loads.

UDN2981A Features

• Output Type: Bipolar, providing high current capability and efficient power delivery.
• Output Configuration: High Side, which allows for easy control and monitoring of the load.
• Current - Output (Max): 500mA per channel, suitable for driving a variety of loads including motors and solenoids.
• Voltage - Load: 5V to 50V, offering a wide operating range to accommodate different power requirements.
• Switch Type: General Purpose, making it versatile for a range of applications.
• Interface: On/Off control, providing straightforward operation and integration.
• Number of Outputs: 8, allowing for simultaneous control of multiple loads.
• Moisture Sensitivity Level (MSL): 3 (168 Hours), ensuring reliability in various environmental conditions.
• REACH Status: REACH Unaffected, ensuring compliance with environmental and safety regulations.
• ECCN: EAR99, indicating compliance with export regulations.
• HTSUS: 8542.39.0001, facilitating proper classification for import/export purposes.
• Package: Tube, suitable for through-hole mounting and easy integration into existing systems.

UDN2981A Applications

The UDN2981A is ideal for applications requiring high current and voltage handling capabilities. Its high-side configuration and bipolar output type make it particularly suitable for driving inductive loads such as relays, solenoids, and small motors. The device's ability to handle up to 500mA per channel and operate within a 5V to 50V load voltage range makes it a versatile solution for various industrial and commercial applications.

Specific use cases include:

• Motor Control: Driving small DC motors in robotic systems, automated machinery, and consumer electronics.
• Relay Control: Controlling high-current relays in automotive and industrial control systems.
• Solenoid Control: Operating solenoids in vending machines, medical devices, and other automated systems.
• General Purpose Load Control: Managing various high-current loads in embedded systems and IoT applications.

Conclusion of UDN2981A

The UDN2981A, despite being an obsolete product, remains a reliable and efficient solution for driving high-current loads in a variety of applications. Its bipolar output type, high-side configuration, and ability to handle up to 500mA per channel make it a robust choice for industrial and commercial use. With a wide load voltage range of 5V to 50V and a simple on/off interface, the UDN2981A offers straightforward integration and operation. While newer alternatives may offer additional features, the UDN2981A continues to provide a cost-effective and reliable solution for driving high-current loads in existing and new designs.

UDN2981A Documents

Download datasheets and manufacturer documentation for UDN2981A

Datasheets :

2981 & 2982 Series      

PCN Packaging :

Tape Change 27/Jan/2023      

HTML Datasheet :

2981 & 2982 Series