Texas Instruments

UC2861DW  

AC DC Converters, Offline Switches

UC2861DW Description

The UC2861DW is a highly versatile offline switcher controller designed for AC-DC conversion applications. Manufactured by Texas Instruments, this device is part of the UC2861 family and is packaged in a 16-pin SOIC (Small Outline Integrated Circuit) format. It is ideal for applications requiring efficient power conversion and control in a compact form factor. The UC2861DW operates within a wide input voltage range of 10.5V to 22V, making it suitable for various power supply designs. It features a switching frequency range of 10kHz to 1MHz, allowing designers to optimize the trade-off between efficiency and component size. The device also includes an internal switch, which simplifies the design process and reduces the number of external components required. With a start-up voltage of 16.5V, the UC2861DW ensures reliable operation even under varying input conditions.

UC2861DW Features

• Wide Input Voltage Range: The UC2861DW operates efficiently within a wide voltage range of 10.5V to 22V, making it suitable for a variety of power supply applications.
• Flexible Switching Frequency: The device supports a switching frequency range from 10kHz to 1MHz, allowing designers to optimize for efficiency and component size.
• Internal Switch: The inclusion of an internal switch simplifies the design process and reduces the number of external components required.
• Soft Start Feature: The UC2861DW incorporates a soft start feature, which helps to minimize inrush current during startup, protecting the power supply and connected circuits.
• Surface Mount Technology: The surface mount package type ensures ease of integration into modern PCB designs, enhancing reliability and reducing the overall footprint.
• Compliance and Reliability: The UC2861DW is REACH unaffected and RoHS3 compliant, ensuring that it meets the latest environmental and safety standards. It also has a moisture sensitivity level (MSL) of 2, indicating a 1-year shelf life under controlled conditions.

UC2861DW Applications

The UC2861DW is well-suited for a variety of applications where efficient power conversion and control are critical. Some of the key applications include:

• Power Supplies: Ideal for designing efficient and reliable power supplies for consumer electronics, industrial equipment, and telecommunications infrastructure.
• Adapters and Chargers: The wide input voltage range and flexible switching frequency make it suitable for creating compact and efficient adapters and chargers.
• Lighting Systems: The UC2861DW can be used in LED lighting systems where precise control and high efficiency are required.
• Medical Devices: Its reliability and compliance with environmental standards make it a suitable choice for power supply designs in medical equipment.

Conclusion of UC2861DW

The UC2861DW from Texas Instruments is a robust and versatile offline switcher controller that offers a wide range of features and benefits for AC-DC conversion applications. Its wide input voltage range, flexible switching frequency, and internal switch make it an excellent choice for designers looking to create efficient and reliable power supplies. The soft start feature and surface mount package type further enhance its appeal, making it easy to integrate into modern PCB designs. With its compliance to environmental standards and reliability, the UC2861DW stands out as a top choice for a variety of applications, from power supplies and adapters to lighting systems and medical devices.

UC2861DW Documents

Download datasheets and manufacturer documentation for UC2861DW

Datasheets :

UC1861-68, UC2861-68, UC3861-68      

HTML Datasheet :

UC1861-68, UC2861-68, UC3861-68