UC3854BDW

Overview

The UC3854BDW is an enhanced high power factor preregulator controller manufactured by Texas Instruments. It operates in a surface-mount SOIC-16 package and supports a switching frequency of up to 200 kHz. The device functions within a supply voltage range of 10 V to 20 V, with a typical operating current of 250 µA. It is rated for commercial temperatures between 0°C and +70°C. Key electrical characteristics include zero-power detection capabilities and a maximum source current of 14 µA.

Feature Summary

• Integrated zero-power detection for improved efficiency at light loads
• Current-mode control architecture for stable operation
• Enhanced power factor correction performance in preregulator applications

Applications

• High power factor preregulators
• Power factor correction (PFC) circuits
• Universal input AC-DC power supplies

Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-16 surface mount package and commercial temperature grade. Ensure compatibility with the required switching frequency and voltage range for the target design. Confirm RoHS compliance status through official documentation before finalizing procurement specifications.

Selection Notes

Select this component when a dedicated PFC controller with integrated zero-power detection is required. Compare against the UC3854AN for through-hole alternatives or the UC2855BDW for higher frequency requirements. Validate that the 200 kHz switching capability meets the electromagnetic interference constraints of the application.

Part Context

This part belongs to the UC3854B series of advanced power factor correction control ICs from Texas Instruments. It serves as a specialized solution for improving input current waveform quality in switch-mode power supplies. The device complements other PMIC offerings focused on energy efficiency standards.

Replacement Considerations

UC3854BDWG4 is a verified lead-free equivalent within the same product family.