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MAX8709B

Maxim Integrated Products
Part Number MAX8709B
Manufacturer Maxim Integrated Products
Description High-Efficiency CCFL Backlight Controller
Published Mar 24, 2010
Detailed Description MAX8709B High-Efficiency CCFL Backlight Controller with SMBus Interface General Description The MAX8709B integrated b...
Datasheet PDF File MAX8709B PDF File

MAX8709B
MAX8709B

Overview
MAX8709B High-Efficiency CCFL Backlight Controller with SMBus Interface 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 safetyfeatures that effectively protect against many single-pointfault 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 MOSF...


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