General Description
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.

Features
♦ Synchronized to Resonant Frequency
   Longer Lamp Life
   Guaranteed Striking Capability
   High Power-to-Light Efficiency
♦ Wide Input Voltage Range (4.6V to 28V)
♦ Feed Forward for Excellent Line Rejection
♦ SMBus Dimming Control Interface
♦ 10:1 Dimming Range
♦ Guaranteed 200Hz to 220Hz DPWM Frequency
♦ Secondary Voltage Limit Reduces Transformer Stress
♦ Adjustable Lamp-Out Protection with 1s Timer
♦ Secondary Current Limit Protects Against High Voltage Short Circuits to Ground
♦ Small, 5mm x 5mm, Thin QFN Package

Applications
Notebook Computer Displays
LCD TVs
LCD Monitors
Automotive Displays
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