UC3854BN

Overview

The UC3854BN is a power factor preregulator circuit manufactured by Texas Instruments, housed in a 16-pin PDIP package. It supports through-hole mounting and operates within a supply voltage range of 10 V to 20 V. The device features a maximum switching frequency of 115 kHz and includes zero-power detection capabilities. Electrical characteristics include a start-up supply current of 0.3 mA, a maximum source current of 14 µA, and a maximum supply current of 18 mA. It functions effectively across an operating temperature range from 0°C to +70°C.

Feature Summary

• Integrated power factor preregulation control for high efficiency
• Built-in zero-power detection functionality
• Average current mode control architecture

Applications

• Power factor correction pre-regulators
• High power factor AC-DC converters
• Universal input power supplies

Procurement Notes

Verify the specific suffix 'BN' against official Texas Instruments documentation to confirm the exact package variant and manufacturing lot details. Ensure compatibility with your PCB footprint requirements for the 16-pin PDIP configuration. Cross-reference the component marking with the manufacturer's latest datasheet to validate authenticity and avoid counterfeit components during procurement.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with a maximum switching frequency of 115 kHz. It is suitable for applications needing operation between 10 V and 20 V supply voltages. Consider the 16-pin PDIP package if through-hole assembly is required for mechanical stability or prototyping purposes.

Part Context

This part belongs to the UC3854 family of enhanced high power factor preregulators. It shares functional similarities with other variants like the UC3854AN and UC3854BDW but differs in packaging and potentially thermal characteristics. The UC3854 series is widely recognized for its sinusoidal input current shaping capabilities in offline power conversion applications.

Replacement Considerations

Check for UC3854AN or UC3854BNG4 as potential substitutes, ensuring package and electrical parameter alignment.