UC2872QTR

Overview

The UC2872QTR is a current-mode PWM controller designed for resonant and phase-shifted full-bridge power supplies. Manufactured by Texas Instruments, it operates within a switching frequency range of 57 kHz to 78 kHz. The device supports a supply voltage (Vcc/Vdd) between 4.5 V and 24 V. It features an operating temperature range from 0°C to 70°C. The component is housed in a 16-SOIC surface-mount package with a width of 7.50 mm. Standard packaging consists of tubes containing 40 units per reel.

Feature Summary

• Implements current-mode control architecture optimized for high-frequency resonant topologies
• Integrates soft-start functionality to manage inrush currents during startup sequences
• Provides precise frequency control capabilities for stable operation across the specified bandwidth

Applications

• Resonant full-bridge power converters
• Phase-shifted full-bridge DC-DC converters
• High-efficiency AC-DC adapter designs
• Server and workstation power supply units

Procurement Notes

Verify the specific suffix 'QTR' indicates tube packaging rather than tape-and-reel configuration. Confirm RoHS3 compliance status through official documentation. Check for alternative suffixes such as 'DW' or 'DR' if different packaging formats are required. Ensure the operating temperature range meets system thermal requirements before finalizing procurement decisions.

Selection Notes

Select this controller for applications requiring precise current-mode regulation in resonant topologies. Evaluate the 57 kHz to 78 kHz frequency range against transformer and inductor design constraints. Consider the 24 V maximum supply voltage limit when designing auxiliary power circuits. Verify that the 16-SOIC package dimensions fit within the available PCB area and thermal management strategy.

Part Context

The UC2872 belongs to Texas Instruments' family of advanced PWM controllers tailored for high-performance power conversion. It complements other devices like the UC2874 by offering specialized control for resonant modes. This series addresses the growing demand for efficient, compact power supplies in computing and industrial sectors.

Replacement Considerations

Public confirmed substitute part numbers include UC2872DW and UC2872DR. These variants share identical electrical specifications but differ in packaging format. Verify pin compatibility and thermal performance when transitioning between tube and tape-and-reel options.