UC3872 Overview
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 acplished with a buck regulator, which is synchronized to the external power stage’s resonant frequency.
UC3872 Key Features
- Controls Different Types of Lamps
- 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