UCC3858N

Overview

The UCC3858N is a high-efficiency, high power factor preregulator from Texas Instruments. It operates as an average current mode PFC controller with a switching frequency of 100 kHz. The device supports topologies including Boost and Flyback. It features a maximum duty cycle of 50%, an output voltage capability of 5 V, and an output current of 1 A. The component functions within a temperature range of 0°C to +70°C and is housed in a 16-PDIP package.

Feature Summary

• Implements average current mode control for power factor correction
• Designed for high efficiency and high power factor preregulation
• Supports multiple converter topologies including Boost and Flyback

Applications

• Secondary power supplies
• Motor drives
• High power factor preregulators

Procurement Notes

Verify the specific package variant and revision level against the manufacturer's latest datasheet before procurement. Confirm that the 16-PDIP form factor meets your board layout requirements. Ensure compatibility with the intended operating temperature range of 0°C to +70°C for your specific application environment.

Selection Notes

Select this component when average current mode control is required for power factor correction. It is suitable for applications needing high efficiency preregulation. Consider the 16-PDIP package constraints and the 100 kHz switching frequency limitations. Verify that the 1 A output current rating aligns with the load requirements of the target system design.

Part Context

The UCC3858N belongs to the UCC3858 series of power management ICs from Texas Instruments. This series focuses on power factor correction solutions. The N suffix indicates the PDIP package version. It is part of the broader PMIC category designed for efficient power conversion systems.

Replacement Considerations

Check for direct pin-compatible substitutes within the UCC3858 series, such as the UCC3858DW. Verify electrical specifications match exactly before substitution.