UC3871NG4

Overview

The UC3871NG4 is a resonant fluorescent lamp controller manufactured by Texas Instruments, designed for lighting and ballast applications. It operates within a switching frequency range of 57 kHz to 78 kHz. The device is housed in an 18-pin DIP package with a standard 0.300-inch (7.62 mm) width. This integrated circuit functions as a dedicated controller for managing the start-up and steady-state operation of resonant fluorescent lamps.

Feature Summary

• Integrated control logic for resonant fluorescent lamp drivers
• Supports variable frequency operation between 57 kHz and 78 kHz
• Designed specifically for lighting and ballast system architectures

Applications

• Resonant fluorescent lamp driver circuits
• Electronic ballast systems for lighting fixtures
• Commercial and industrial lighting power supplies

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's current datasheet to confirm lead-free compliance and RoHS status. Ensure the 18-DIP package dimensions match the target PCB footprint. Confirm that the operating frequency range aligns with the transformer design requirements for the intended lamp type.

Selection Notes

Select this component when designing resonant topologies for fluorescent lighting rather than hard-switched PWM controllers. The fixed frequency range suits applications where magnetic component sizing is optimized for the 57-78 kHz band. Consider thermal management capabilities inherent to the DIP package for the specific enclosure environment.

Part Context

This part belongs to the Texas Instruments UC387x series of lighting controllers. It serves as a specialized solution for resonant lamp driving, distinct from general-purpose DC-DC converters. The NG4 designation indicates a through-hole package variant suitable for prototyping or high-reliability assembly methods requiring manual soldering.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the UC387x family. Verify if newer revisions have superseded the G4 suffix regarding material composition. Cross-reference electrical parameters with other TI resonant controllers if redesigning the magnetic components.