AN6016 is an application note about the LCD backlight inverter drive IC (FAN7311). The IC provides a highly efficient CCFL backlight power supply for notebook computers and other portable applications. It features small size, high efficiency, and low cost. The FAN7311 integrates various circuit blocks including feedback-controlled PWM driver stage, soft start, open lamp regulation, and UVLO protection, minimizing external parts count and reducing system cost. The FAN7311 typically consumes less than 4mA of operating current, improving overall system efficiency. It supports analog and burst dimming modes and provides open lamp regulation and protection.
The FAN7311 is a highly efficient Cold Cathode Fluorescent Lamp (CCFL) inverter designed for notebook computers and portable applications. It integrates features such as feedback-controlled Pulse Width Modulation (PWM) driver stage, soft start, open lamp regulation, and Under Voltage Lockout (UVLO) protection. The IC operates with an input voltage range of 5V to 25.5V and is available in 20-SSOP and 20-SOIC packages.
| Operating Current | less than 4mA |
|---|---|
| Input Voltage Range | 5V to 25.5V |
| Package Types | 20-SSOP and 20-SOIC |
| UVLO Turn-on Voltage | 5V |
| UVLO Standby Current | less than 200pA |
| ENA Enable Voltage | higher than 2V |
| Burst Dimming Frequency | greater than 120Hz |
The FAN7311 typically consumes less than 4mA of operating current.
The IC allows operation with an input voltage from 5V to 25.5V.
The UVLO circuit turns on the control circuit when the input voltage exceeds 5V.
The burst dimming frequency should be greater than 120Hz to avoid visible flicker.