Overview of Texas Instruments UCC28C40DR

The UCC28C40DR is a high-performance, BiCMOS off-line controller from Texas Instruments, designed specifically for switch mode power supplies. This integrated circuit is part of the UCC28C4x series, which is known for its versatility in low-power applications. The device offers excellent features that make it suitable for a wide range of power conversion applications, including AC-to-DC adapters, offline battery chargers, and auxiliary power supplies.

Key Features

• Flexible Operation Modes: The UCC28C40DR supports both current mode and voltage mode control, providing designers with flexibility in choosing the control method that best fits their application requirements.
• Low Start-Up and Operating Current: The device boasts a low start-up current of typically 0.5 µA and an operating current of 3 mA, making it an energy-efficient solution for power supply designs.
• High-Frequency Operation: With a maximum duty cycle of 100%, the UCC28C40DR is capable of high-frequency operation, which can lead to smaller and more cost-effective designs by allowing the use of smaller passive components.
• Trimmed Oscillator Discharge Current: The oscillator discharge current is trimmed to 8.3 mA, ensuring precise frequency control over temperature and process variations.
• Internal Soft Start: An internal soft-start feature limits the inrush current during start-up, contributing to the reliability and longevity of the power supply.
• Under-Voltage Lockout (UVLO): Both line and low-side under-voltage lockout circuits prevent the controller from operating at insufficient supply voltages, which could lead to unpredictable performance.

Package and Availability

The UCC28C40DR is available in an 8-pin SOIC package, which is suitable for automated assembly processes and is widely used in commercial and industrial applications. Texas Instruments ensures the availability of this product, providing long-term support and supply chain reliability for designers and manufacturers.

Applications

This versatile controller is ideal for a variety of applications, including:

• AC-to-DC power supplies
• DC-to-DC converters
• Power adapters for consumer electronics
• LED drivers
• Auxiliary power supplies for industrial systems

With its robust feature set and Texas Instruments' reputation for quality, the UCC28C40DR is a reliable choice for power supply designers looking to optimize their systems for performance and cost.