UC3872DW

Overview

The UC3872DW is a resonant lamp ballast controller manufactured by Texas Instruments, designed for CCFL and neon lamp applications. It operates within a frequency range of 57kHz to 78kHz and supports a supply voltage of 4.5V to 24V. The device features a maximum output current of 20mA and consumes 6mA of operating supply current. It dissipates up to 1W of power and functions reliably between 0°C and +70°C. Housed in a 16-SOIC surface-mount package, it serves as a dedicated driver IC for display backlighting systems.

Feature Summary

• Integrated control logic for resonant lamp ballast operation
• Supports cold start and soft-start sequences for lamp ignition
• Includes overvoltage and overcurrent protection mechanisms
• Compatible with standard CCFL and neon lamp configurations

Applications

• CCFL backlight controllers for LCD displays
• Neon lamp ballast systems
• Resonant converter designs for lighting applications

Procurement Notes

Verify the specific suffix (e.g., DW vs. DWG4) against the official datasheet to ensure compliance with RoHS directives and material declarations. Confirm that the 16-SOIC package dimensions match the target PCB footprint. Check moisture sensitivity level (MSL 2) requirements for storage and handling prior to assembly. Ensure the supplier provides valid traceability documentation for the Texas Instruments manufacturing origin.

Selection Notes

Select this component when designing resonant ballasts for CCFL or neon lamps requiring operation between 57kHz and 78kHz. It is suitable for applications needing integrated protection features and a wide input voltage range up to 24V. Consider the 16-SOIC package for surface-mount assembly constraints. Evaluate thermal dissipation capabilities given the 1W power rating in enclosed environments.

Part Context

The UC3872 belongs to the UC3872 family of resonant lamp ballast controllers from Texas Instruments. It is part of the broader Display Drivers & Controllers category, specifically under Ballast Controllers. This series is engineered for high-efficiency lighting control, distinguishing itself from general-purpose PWM controllers by its specialized resonance management and lamp ignition support.

Replacement Considerations

UC3872MG4 is a verified lead-free variant within the same functional family. UC3872DWG4 is the RoHS-compliant version of the DW package. Verify pinout compatibility before substitution.