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UC3872 - Resonant Lamp Ballast Controller

General Description

The UC3872 is a resonant lamp ballast controller optimized for driving cold cathode fluorescent, neon, and other gas discharge lamps.

The resonant power stage develops a sinusoidal lamp drive voltage, and minimizes switching loss and EMI generation.

Key Features

  • Controls Different Types of Lamps: Cold Cathode Fluorescent, Neon, and Gas Discharge.
  • Zero Voltage Switching (ZVS) of Push-Pull Drivers.
  • Accurate Control of Lamp Current.
  • Variable Lamp Intensity Control.
  • 1µA Disable Current.
  • 4.5V to 24V Operation.
  • Open Lamp Detection Circuitry.

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Datasheet Details

Part number UC3872
Manufacturer Unitrode
File Size 374.08 KB
Description Resonant Lamp Ballast Controller
Datasheet download datasheet UC3872 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Resonant Lamp Ballast Controller application INFO available UC1872 UC2872 UC3872 FEATURES • Controls Different Types of Lamps: Cold Cathode Fluorescent, Neon, and Gas Discharge • Zero Voltage Switching (ZVS) of Push-Pull Drivers • Accurate Control of Lamp Current • Variable Lamp Intensity Control • 1µA Disable Current • 4.5V to 24V Operation • Open Lamp Detection Circuitry DESCRIPTION The UC3872 is a resonant lamp ballast controller optimized for driving cold cathode fluorescent, neon, and other gas discharge lamps. The resonant power stage develops a sinusoidal lamp drive voltage, and minimizes switching loss and EMI generation. Lamp intensity adjustment is accomplished with a buck regulator, which is synchronized to the external power stage’s resonant frequency.