Low-cost Ccfl Backlight Controller

The MAX8722 integrated backlight controller is opti- mized to drive cold-cathode fluorescent lamps (CCFLs) using a full-bridge resonant inverter architecture. Resonant operation maximizes striking capability and provides near-sinusoidal waveforms over the entire input range to improve CCFL lifetime. The controller operates over a wide input voltage range (4.6V to 28V) with high power to light efficiency. The device also includes safety features that effectively protect against many single-point fault conditions including lamp-out and short-circuit faults. The MAX8722 achieves 10:1 dimming range by chop- ping the lamp current on and off using a digital pulse- width modulation (DPWM) method. The DPWM frequency CAN be accurately adjusted with a resistor or synchro- nized to an external signal. The brightness is controlled by an Analog voltage on the CNTL pin. The device direct- ly drives the four external n-channel Power MOSFETs of the full-bridge inverter. An internal 5.3V linear Regulator powers the MOSFET drivers, the DPWM Oscillator and most of the internal circuitry. The MAX8722 is available in a low-cost, 24-pin QSOP package and operates over a -40C to +85C temperature range. By Maxim Integrated Products
MAX8722 's PackagesMAX8722 's pdf datasheet
MAX8722EEG QSOP




MAX8722 Pinout, Pinouts
MAX8722 pinout,Pin out
This is one package pinout of MAX8722,If you need more pinouts please download MAX8722's pdf datasheet.

MAX8722 Application circuits
MAX8722 circuits
This is one application circuit of MAX8722,If you need more circuits,please download MAX8722's pdf datasheet.


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