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MAX1839

Maxim
Part Number MAX1839
Manufacturer Maxim
Description Wide Brightness Range CCFL Backlight Controllers
Published May 6, 2005
Detailed Description 19-1755; Rev 1; 3/01 Wide Brightness Range CCFL Backlight Controllers General Description The MAX1739/MAX1839 fully int...
Datasheet PDF File MAX1839 PDF File

MAX1839
MAX1839

Overview
19-1755; Rev 1; 3/01 Wide Brightness Range CCFL Backlight Controllers General Description The MAX1739/MAX1839 fully integrated controllers are optimized to drive cold-cathode fluorescent lamps (CCFLs) using the industry-proven Royer oscillator inverter architecture.
The Royer architecture provides near sinusoidal drive waveforms over the entire input range to maximize the life of CCFLs.
The MAX1739/ MAX1839 optimize this architecture to work over a wide input voltage range, achieve high efficiency, and maximize the dimming range.
The MAX1739/MAX1839 monitor and limit the transformer center-tap voltage when required.
This ensures minimal voltage stress on the transformer, which increases the operating life of the transformer and eases its design requirements.
These controllers also provide protection against many other fault conditions, including lamp-out and buck short faults.
These controllers achieve 50:1 dimming range by simultaneously adjusting lamp current and “chopping” the CCFL...


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