UCC1972/3 UCC2972/3 UCC3972/3
Bi
CMOS Cold Cathode Fluorescent Lamp Driver Controller
FEATURES • 1mA Typical Supply Current • Accurate Lamp Current Control • Analog or Low Frequency Dimming
Capability
• Open Lamp Protection • Programmable Startup Delay • 4.
5V to 25V Operation • PWM Frequency Synchronized to
External Resonant Tank
• 8 Pin TSSOP and SOIC Packages Available
• Internal
Voltage Clamp Protects Transformer from Over-
voltage (UCC3973)
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
Design goals for a Cold Cathode Fluorescent Lamp (CCFL) converter used in a notebook computer or portable application include small size, high efficiency, and low cost.
The UCC3972/3 CCFL controllers provide th...