Product Overview: UCC2813DTR-2G4

The UCC2813DTR-2G4 is a high-performance, low-power BiCMOS current-mode pulse width modulator (PWM) controller from Texas Instruments. This integrated circuit is designed to deliver precise power control and is part of the UCC28C4x/UCC38C4x series, which are industry-standard devices known for their reliability and flexibility in various power supply applications.

This PWM controller operates at a fixed frequency that is programmed by the user and can be used in a wide range of applications, including DC-DC converters, off-line power supplies, and other power conversion technologies. It is especially suitable for systems that require high efficiency, such as telecom power supplies, server power supplies, and industrial power systems.

Key Features:

• High-Performance Operation: The UCC2813DTR-2G4 offers a high-frequency operation up to 1MHz, which allows for smaller external components, resulting in compact and efficient power supply designs.
• Low Startup and Operating Current: This device features a very low startup current of typically 0.5 µA and an operating current of typically 2.5 mA, which enhances the overall efficiency of the power supply.
• Current Mode Control: Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation.
• Trimmed Oscillator Discharge Current: The oscillator discharge current is trimmed to ensure precise duty cycle clamping, which is critical for reliable and predictable operation of the power supply.
• Automatic Feed-Forward Compensation: This feature helps in maintaining stability over a wide range of input voltages and output loads.
• Programmable Soft-Start: The UCC2813DTR-2G4 includes a soft-start function that limits inrush current during startup, providing a controlled power-up sequence.

Package and Availability:

The UCC2813DTR-2G4 comes in a TSSOP-14 (Thin Shrink Small Outline Package) which is suitable for surface mount technology (SMT). This package ensures a minimal footprint on the PCB, which is essential for space-constrained applications. The device is available in tape and reel packaging, facilitating efficient assembly processes for high-volume production.

Applications:

• AC-DC Power Supplies
• Isolated and Non-Isolated DC-DC Converters
• Telecom and Datacom Power Systems
• Industrial Power Supplies

In summary, the UCC2813DTR-2G4 PWM controller from Texas Instruments is a versatile and efficient solution for advanced power supply designs, offering precise control, high efficiency, and a compact form factor.