UCC38501DWTR

Overview

The UCC38501DWTR is a BiCMOS Power Factor Correction and Pulse Width Modulation combination controller manufactured by Texas Instruments. It integrates average current mode PFC control with PWM regulation in a single package to simplify power supply design. The device operates within a supply voltage range of 9 V to 16.5 V and supports switching frequencies up to 1 MHz. It is housed in a 20-pin SOIC package (DW) and is designed for operation temperatures between 0°C and +70°C.

Feature Summary

• Integrates average current mode PFC and PWM controllers into a single BiCMOS chip
• Provides complete protection features including overvoltage, undervoltage, and thermal shutdown
• Supports high-frequency operation for compact magnetics design

Applications

• High-power-factor AC-DC adapters
• Notebook computer power supplies
• Telecommunications power systems

Procurement Notes

Verify the specific suffix 'DWTR' corresponds to the tape-and-reel packaging format when ordering. Confirm that the 20-SOIC footprint matches the target PCB layout. Ensure the operating environment remains within the specified commercial temperature range of 0°C to +70°C for reliable performance.

Selection Notes

Select this component for designs requiring tight integration of PFC and PWM stages without external coordination logic. It is suitable for applications prioritizing board space reduction and simplified bill of materials. Consider thermal management requirements due to the integrated nature of the dual controllers within the single package.

Part Context

This part belongs to the UCC3850x series of combination controllers from Texas Instruments. These devices are engineered to replace discrete PFC and PWM solutions, offering a unified approach to power factor correction and voltage regulation. The DWTR variant specifically denotes the reel-packaged version of the standard DW SOIC device.

Replacement Considerations

Direct replacements include the UCC38501DW. Other compatible family members may include the UCC28500 series or UCC38500 series, though pinouts and specific electrical characteristics should be verified against official datasheets before substitution.