UC3871DWTR

Overview

The UC3871DWTR is a phase-shifted resonant PWM controller manufactured by Texas Instruments, designed for high-frequency power conversion applications. It operates within a supply voltage range of 9V to 20V and supports switching frequencies up to 300 kHz. The device features four outputs and utilizes a 20-SOIC surface-mount package with a width of 7.50mm. It includes control characteristics such as frequency control, slope compensation, and soft-start functionality. The component is rated for an operating temperature range of 0°C to 70°C and complies with RoHS3 standards.

Feature Summary

• Supports phase-shifted resonant topology for efficient power conversion
• Integrates soft-start capability to manage inrush currents during startup
• Provides four independent output channels for multi-phase or bridge configurations

Applications

• High-frequency AC/DC converters
• Offline full-bridge power supplies
• Resonant DC-DC converter designs

Procurement Notes

Verify the specific suffix 'DWTR' indicates the tape-and-reel packaging variant rather than tube packaging. Confirm that the RoHS3 compliance status aligns with current environmental regulations for your target market. Ensure the 20-SOIC footprint matches your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring phase-shifted resonant control with integrated soft-start. Consider the 300 kHz maximum switching frequency for size optimization. Verify that the 9V to 20V Vcc range suits your auxiliary power supply design. Check if the 20-SOIC package is compatible with your assembly capabilities.

Part Context

This part belongs to the UC387x series of resonant controllers from Texas Instruments. It shares functional similarities with other members like the UC3879 but differs in package type and specific pinout configuration. The DWTR suffix specifically denotes the reel-packaged version intended for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.