DESCRIPTION

· The UCC3972/3 CCFL controllers are designed for efficient CCFL backlight power supplies in compact 8-pin TSSOP packages.

· These BiCMOS controllers consume less than 1mA, enhancing system efficiency compared to bipolar controllers.

· Integrated features like PWM driver, open lamp protection, and synchronization reduce external parts and system cost.

· Operates with input voltages from 4.5V to 25V, supporting analog and low-frequency dimming modes.

· UCC3973 includes a programmable voltage clamp for transformer protection during startup or open lamp conditions.

FEATURES

· 1mA typical supply current for improved efficiency.

· Precise lamp current control for consistent performance.

· Supports both analog and low-frequency dimming for flexible operation.

· Open lamp protection ensures safety and reliability.

· Programmable startup delay for controlled initialization.

· Wide operating voltage range from 4.5V to 25V.

· PWM frequency synchronized with external resonant tank for stability.

· Available in 8-pin TSSOP and SOIC packages for versatile integration.

· Internal voltage clamp in UCC3973 protects transformer from over-voltage.

APPLICATIONS

· Ideal for notebook computers and portable devices requiring compact, efficient CCFL backlight solutions.

· Suitable for applications needing precise lamp current control and dimming capabilities.

· Used in systems where transformer protection and low power consumption are critical.