High-efficiency Ccfl Backlight Controller With Smbus Interface

The MAX8709B integrated backlight controller is optimized to drive cold-cathode fluorescent lamps (CCFLs) using a resonant full-bridge inverter architecture. The 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 of 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 MAX8709B achieves 10:1 dimming range by chop- ping the lamp current on and off using a digital pulse- width-modulation (DPWM) method. The minimum DPWM duty cycle of the MAX8709B is 12.5%. The brightness is controlled with a 2-wire SMBus-compatible Interface The device directly 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 MAX8709B is available in a space-saving 28-pin thin QFN package and operates over a -40C to +85C temperature range. By Maxim Integrated Products
MAX8709B 's PackagesMAX8709B 's pdf datasheet

MAX8709B Pinout, Pinouts
MAX8709B pinout,Pin out
This is one package pinout of MAX8709B,If you need more pinouts please download MAX8709B's pdf datasheet.

MAX8709B Application circuits
MAX8709B circuits
This is one application circuit of MAX8709B,If you need more circuits,please download MAX8709B's pdf datasheet.

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