UCC28503N

Overview

The UCC28503N is a BiCMOS Power Factor Correction (PFC) and Pulse Width Modulation (PWM) combined controller manufactured by Texas Instruments. It integrates PFC and PWM control functions into a single device to simplify power supply design. The component operates with a switching frequency of 200 kHz and supports an operating temperature range from -40°C to +85°C. It is housed in a 20-pin PDIP package designed for through-hole mounting. The device features a typical operating supply current of 150 µA, contributing to efficient standby power management in regulated power supplies.

Feature Summary

• Integrates both PFC and PWM controllers within a single IC to reduce component count
• Utilizes BiCMOS technology for high-performance analog and digital control
• Supports average current mode control for improved line regulation

Applications

• High-power-factor pre-regulators
• Universal input AC-DC power supplies
• Telecommunications power systems

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP package variant rather than the DW SOIC version. Confirm RoHS compliance status via the latest manufacturer datasheet as specifications may evolve. Check for any product discontinuance notifications or lifecycle changes directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when a unified solution for both power factor correction and DC-DC conversion is required. It is suitable for designs prioritizing reduced bill-of-materials and simplified layout over discrete controller implementations. Ensure the application requires through-hole mounting capabilities compatible with the 20-PDIP form factor.

Part Context

This part belongs to the UCC2850x series of combined PFC/PWM controllers. It shares functional similarities with the UCC28502 but offers a higher switching frequency specification. The series is designed to meet stringent efficiency and power factor standards for universal input applications.

Replacement Considerations

The UCC28502N is a related variant within the same family offering similar functionality at a different switching frequency.