UC3854NG4

Overview

The UC3854NG4 is a power factor correction controller manufactured by Texas Instruments, designed for high-performance preregulator applications. It operates within a supply voltage range of 14.5V to 30V and supports a switching frequency up to 200 kHz. The device utilizes average current mode control to achieve high power factor and low total harmonic distortion. It is housed in a 16-pin PDIP package suitable for through-hole mounting. The operational temperature range spans from 0°C to +70°C, with a startup supply current of 1.5 mA.

Feature Summary

• Implements average current mode control architecture for precise regulation
• Provides enhanced power factor preregulation capabilities
• Integrates zero-power detection functionality

Applications

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

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status as documented by Texas Instruments. Confirm the package type corresponds to the 16-pin PDIP form factor. Ensure the operating environment remains within the specified 0°C to +70°C temperature range. Cross-reference the manufacturer part number UC3854NG4 with official datasheets to validate electrical parameters before integration.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with through-hole assembly constraints. It is suitable for applications needing operation up to 200 kHz switching frequencies. Consider the 14.5V to 30V supply voltage range during power stage design. Evaluate thermal management requirements given the standard industrial temperature limits.

Part Context

This component belongs to the UC3854 series of advanced power factor correction control ICs from Texas Instruments. The series includes variants such as UC3854AN and UC3854BN, which share similar functional architectures but may differ in specific electrical characteristics or packaging options. The UC3854NG4 specifically denotes the lead-free, RoHS-compliant version in a PDIP package.

Replacement Considerations

UC3854N serves as a direct equivalent within the same product family. UC3854ANG4 is also listed as an alternative variant. Verify pinout compatibility and electrical specifications against the official datasheet before substitution.