UC3854BDWG4

Overview

The UC3854BDWG4 is an enhanced high power factor preregulator integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 200 kHz. The device is housed in a 16-pin SOIC package designed for surface mount installation. It functions within a commercial temperature range from 0°C to +70°C. Key electrical characteristics include a typical operating supply current of 250 µA and a maximum source current of 14 µA.

Feature Summary

• Implements average current mode control architecture for precise power factor correction
• Integrates zero-power detection capability to minimize standby losses
• Features internal oscillator with frequency compensation for stable operation

Applications

• High power factor pre-regulators in AC-DC power supplies
• Power factor correction stages in computer peripherals
• Industrial power supply systems requiring compliance with harmonic standards

Procurement Notes

Verify the G4 suffix indicates lead-free (RoHS) compliance as per manufacturer specifications. Confirm the SOIC-16 package dimensions match your PCB footprint requirements. Ensure the commercial temperature rating aligns with your system's thermal environment. Cross-reference the specific datasheet revision for any pinout or electrical parameter updates before finalizing procurement.

Selection Notes

Select this component when designing power factor correction circuits requiring average current mode control. It is suitable for applications needing a 16-pin surface-mount solution with low quiescent current. Consider the 200 kHz switching frequency limit when determining external passive component values. Verify that the 10 V to 20 V supply range meets your controller biasing needs.

Part Context

This part belongs to the UC3854B series of advanced power factor correction control ICs. It serves as an enhanced version of earlier models, offering improved performance in high power factor preregulator designs. The family is widely used in offline power conversion applications where efficiency and harmonic distortion reduction are critical design parameters.

Replacement Considerations

The UC3854BDW is the non-RoHS equivalent of this component. For active replacements, consider the UCC28180DR as a recommended modern alternative from Texas Instruments.