UCC3818DW

Overview

The UCC3818DW is a BiCMOS power factor preregulator controller manufactured by Texas Instruments, housed in a 16-pin SOIC package. It operates with a supply voltage range of 9.7V to 18V and supports switching frequencies between 6kHz and 220kHz. The device features a maximum duty cycle of 99% and functions within an operating temperature range of 0°C to 70°C. Designed for average current mode control, it integrates essential protection mechanisms including overvoltage lockout and thermal shutdown to ensure reliable operation in power factor correction applications.

Feature Summary

• Implements average current mode control 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 applications

Applications

• Power factor correction preregulators
• Universal AC-DC power supplies
• Offline switch-mode power supplies

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature rating. Confirm RoHS compliance status and lifecycle stage through authorized channels. Ensure ordering details match the exact component designation to avoid functional discrepancies.

Selection Notes

Select this component for designs requiring average current mode PFC control with integrated protections. Evaluate thermal management requirements based on the specified operating temperature range. Verify compatibility with the target switching frequency and input voltage specifications.

Part Context

This part belongs to the UCC3818 family of BiCMOS power factor preregulators from Texas Instruments. It serves as a specialized controller for improving efficiency in offline power conversion systems. The DW suffix indicates a specific plastic small-outline package variant designed for surface-mount assembly.

Replacement Considerations

Consult official substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics before implementation.