MAX753/MAX754 are MAXIM's ICs designed specifically for backlit notebook computer applications. It can drive cold cathode fluorescent lamps (CCFLs) and provide the LCD backplane bias (contrast) power for color or monochrome LCD panels.
The MAX753 and MAX754 are integrated circuits that drive cold‑cathode fluorescent lamps (CCFLs) and provide LCD backplane bias (contrast) power for portable notebook and handheld devices. They can independently shut down the backlight and backplane sections, reducing supply current to a few microamps, and support digital or potentiometer control of brightness and contrast.
Key features include a 4 V to 30 V battery voltage range, low 500 µA supply current, 100 mW – 6 W CCFL power capability, and separate negative (MAX753) or positive (MAX754) LCD bias outputs. The devices operate from a regulated 5 V supply and include built‑in DACs for precise voltage control.
| Shutdown supply current (both sections off) | 25 µA |
|---|---|
| Battery voltage range | 4 V to 30 V |
| CCFL output power | 100 mW to 6 W |
| LCD bias polarity | MAX753 negative, MAX754 positive |
The supply current drops to 25 µA when both the backlight and backplane sections are shut down.
They operate from a battery voltage of 4 V up to 30 V.
Both are adjusted by separate digital inputs or by external potentiometers.
Each device can provide between 100 mW and 6 W of power to one or two CCFL tubes.