UCC3818DTR

Overview

The UCC3818DTR is a Texas Instruments average current mode power factor controller designed for offline power supplies. It operates within a switching frequency range of 6 kHz to 220 kHz and supports a supply voltage between 9.7 V and 18 V. The device features a maximum duty cycle of 99% and functions reliably across an operating temperature range of 0°C to 70°C. Packaged in a 16-SOIC surface-mount format, it integrates essential protection mechanisms including overvoltage lockout and thermal shutdown to ensure stable performance in power factor correction applications.

Feature Summary

• Implements average current mode control architecture for high-performance power factor correction
• Integrates comprehensive protection features including overvoltage lockout and thermal shutdown
• Supports wide input voltage ranges suitable for universal AC line operation

Applications

• Offline power factor correction preregulators
• Universal input AC-DC power supplies
• Computer and peripheral power systems

Procurement Notes

Verify the specific suffix DTR indicates tape-and-reel packaging when sourcing components. Confirm RoHS compliance status and moisture sensitivity level requirements against project specifications. Ensure the supplier provides valid traceability documentation for quality assurance purposes prior to final procurement authorization.

Selection Notes

Select this component for designs requiring average current mode PFC with integrated protection. Evaluate thermal management needs given the SOIC-16 package constraints. Compare against alternative TI series such as UCC2818 or UCC3817 based on specific frequency and voltage requirements.

Part Context

This part belongs to the UCC3818 family of power factor controllers from Texas Instruments. It serves as a key component in improving efficiency and reducing harmonic distortion in AC-DC conversion stages. The device complements other PMIC offerings by providing dedicated functionality for pre-regulation stages in modern power electronics.

Replacement Considerations

Consider UCC3818DR as a direct pin-compatible alternative with identical electrical characteristics but different packaging configuration.