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MAX754ESE Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX754ESE Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page _______________General Description The MAX753/MAX754 drive cold-cathode fluorescent lamps (CCFLs) and provide the LCD backplane bias (contrast) power for color or monochrome LCD panels. These ICs are designed specifically for backlit note- book-computer applications. Both the backplane bias and the CCFL supply can be shut down independently. When both sections are shut down, supply current drops to 25µA. The LCD contrast and CCFL brightness can be adjusted by clocking sep- arate digital inputs or using external potentiometers. LCD contrast and backlight brightness settings are pre- served in their respective counters while in shutdown. On power-up, the LCD contrast counter and CCFL brightness counter are set to one-half scale. The ICs are powered from a regulated 5V supply. The magnetics are connected directly to the battery, for maximum power efficiency. The CCFL driver uses a Royer-type resonant architec- ture. It can provide from 100mW to 6W of power to one or two tubes. The MAX753 provides a negative LCD bias voltage; the MAX754 provides a positive LCD bias voltage. ________________________Applications Notebook Computers Palmtop Computers Pen-Based Data Systems Personal Digital Assistants Portable Data-Collection Terminals ____________________________Features o Drives Backplane and Backlight o 4V to 30V Battery Voltage Range o Low 500µA Supply Current o Digital or Potentiometer Control of CCFL Brightness and LCD Bias Voltage o Negative LCD Contrast (MAX753) o Positive LCD Contrast (MAX754) o Independent Shutdown of Backlight and Backplane Sections o 25µA Shutdown Supply Current ______________Ordering Information * Contact factory for dice specifications. CCFL Backlight and LCD Contrast Controllers ________________________________________________________________ Maxim Integrated Products 1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 LFB BATT LX LDRV CON LON LADJ VDD MAX753 MAX754 PGND CDRV CS CC CFB REF GND CADJ DIP/SO TOP VIEW __________________Pin Configuration Call toll free 1-800-998-8800 for free samples or literature. 19-0197; Rev 1; 1/95 PART TEMP. RANGE MAX753CPE 0°C to +70°C MAX753CSE 0°C to +70°C MAX753C/D 0°C to +70°C Dice* 16 Narrow SO 16 Plastic DIP PIN-PACKAGE MAX753EPE -40°C to +85°C MAX753ESE -40°C to +85°C 16 Narrow SO 16 Plastic DIP MAX754CPE 0°C to +70°C MAX754CSE 0°C to +70°C MAX754C/D 0°C to +70°C Dice* 16 Narrow SO 16 Plastic DIP MAX754EPE -40°C to +85°C MAX754ESE -40°C to +85°C 16 Narrow SO 16 Plastic DIP Block Diagram located at end of data sheet. |
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