The OZ8805LN is a high-efficiency, cold cathode fluorescent lamp (CCFL) backlight controller from O2Micro. This controller is specifically designed for use in LCD panels, primarily found in older generation laptops and monitors, that utilize CCFL technology for their backlight. The OZ8805LN integrates a variety of features aimed at optimizing performance, efficiency, and protection of the CCFL backlight system.

Applications:

• LCD Monitors (CCFL Backlit)
• Laptop Computers (CCFL Backlit)
• Industrial LCD Panels (CCFL Backlit)

Features:

• High-Efficiency Resonant Full-Bridge Converter
• Integrated Dimming Control
• Open Lamp Protection
• Short Lamp Protection
• Over Voltage Protection
• Under Voltage Lockout
• Soft Start Function

Benefits:

• Extended Lamp Life: The OZ8805LN's design ensures proper CCFL driving conditions, helping to extend the lifespan of the CCFL lamps.
• Improved Efficiency: The high-efficiency resonant full-bridge converter minimizes power loss, contributing to better energy conservation.
• Reliable Protection: Comprehensive protection features safeguard the backlight system and the controller from damage due to open lamp, short lamp, or over-voltage conditions.
• Stable Operation: Soft start function and under-voltage lockout ensure a stable and reliable startup and operation, even under fluctuating input voltage conditions.
• Precise Dimming Control: The integrated dimming control allows for accurate adjustment of the backlight brightness to suit varying ambient lighting conditions.

Technical Specifications:

The OZ8805LN typically operates with an input voltage range of 7V to 24V. The output voltage and current are determined by the specifications of the CCFL lamps being driven. The operating frequency of the resonant full-bridge converter is usually in the range of tens to hundreds of kHz. Protection features like open lamp protection trigger when the lamp voltage exceeds a threshold, and short lamp protection is activated when the lamp current exceeds a predefined limit. The device often comes in a small outline package (SOP).

While CCFL backlighting technology is becoming less common with the rise of LED backlights, the OZ8805LN provided a robust and efficient solution for driving CCFL lamps in LCD panels during its prime.