UC3871N

Overview

The UC3871N is a fluorescent lamp controller manufactured by Texas Instruments, designed for resonant control applications. It operates within a supply voltage range of 4.5 V to 20 V and supports a maximum switching frequency of 78 kHz. The device utilizes current-mode control techniques to manage power delivery. It is housed in an 18-pin plastic DIP package (MS-001AC) suitable for through-hole mounting. The component functions as a dedicated driver for fluorescent lighting systems.

Feature Summary

• Implements current-mode control architecture for precise regulation
• Supports resonant control topology for efficient operation
• Designed specifically for fluorescent light controller applications

Applications

• Fluorescent lighting systems
• Resonant lamp drivers
• Display backlight controllers

Procurement Notes

Verify the specific manufacturer source, as Rochester Electronics also distributes this part number alongside Texas Instruments. Confirm the package type matches the design requirements, noting that both PLCC-20 and PDIP-18 variants exist under similar identifiers. Check RoHS compliance status and humidity sensitivity levels before integration into production assemblies.

Selection Notes

Select this component when designing circuits requiring resonant control for fluorescent lamps. Ensure the input voltage range aligns with the 4.5 V to 20 V specification. Consider the 78 kHz maximum switching frequency limit when determining transformer and filter component values. Verify thermal management capabilities for the intended operating temperature range.

Part Context

This controller belongs to the UC series of power management components. It serves as a specialized solution for lighting applications rather than general-purpose DC-DC conversion. The device integrates necessary control logic to drive resonant tank circuits efficiently.

Replacement Considerations

UC3871Q