UCC2818APWRG4

Overview

The UCC2818APWRG4 is a BiCMOS power factor preregulator controller manufactured by Texas Instruments. It operates in average current mode to achieve high power factor and low total harmonic distortion. The device supports a switching frequency range from 6 kHz to 220 kHz. It features an integrated multiplier for sinusoidal line current shaping and includes protection mechanisms such as cycle-by-cycle peak current limiting, undervoltage lockout, and thermal shutdown. The component is housed in a 16-pin TSSOP package and is designed for universal AC input applications.

Feature Summary

• Implements average current mode control for precise power factor correction
• Integrates a high-performance analog multiplier for input current shaping
• Provides comprehensive protection against overcurrent, undervoltage, and overheating

Applications

• Universal AC-DC power supplies
• Computer and peripheral power adapters
• Telecommunications equipment power systems

Procurement Notes

Verify the specific suffix 'PWRG4' confirms the TSSOP-16 package and RoHS compliance status. Confirm the manufacturer is Texas Instruments. Ensure the datasheet version matches the required design specifications. Check for any recent product change notices regarding packaging or material composition before finalizing procurement.

Selection Notes

Select this component for designs requiring high efficiency and low harmonic distortion in offline power conversion. It is suitable for applications needing a robust solution with integrated protection features. Consider the operating temperature range and package thermal performance when designing the PCB layout. Verify compatibility with the target switching frequency requirements.

Part Context

This part belongs to the UCC2818A family of BiCMOS power factor preregulators. It is designed to replace older UC185x series controllers with improved performance and integration. The family offers a cost-effective solution for meeting regulatory standards for electromagnetic interference and power quality in consumer and industrial electronics.

Replacement Considerations

Direct replacements include UCC2818AD and UCC2818MDREP within the same family. Verify pin compatibility and electrical parameters before substitution. Other compatible parts may include UCC2817A variants depending on specific topology requirements.