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MAX8648

Maxim Integrated Products
Part Number MAX8648
Manufacturer Maxim Integrated Products
Description (MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
Published Feb 11, 2010
Detailed Description 19-0790; Rev 0; 4/07 Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN General Description The ...
Datasheet PDF File MAX8648 PDF File

MAX8648
MAX8648

Overview
19-0790; Rev 0; 4/07 Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN General Description The MAX8647/MAX8648 drive up to six white LEDs or two sets of RGB LEDs with regulated constant current for display backlight and fun light applications.
By utilizing an inverting charge pump and extremely lowdropout adaptive current regulators, these ICs achieve very high efficiency over the full 1-cell Li+ battery voltage range and even with large LED forward voltage mismatch.
The 1MHz fixed-frequency switching allows for tiny external components.
The regulation scheme is optimized to ensure low EMI and low input ripple.
The MAX8647/MAX8648 include thermal shutdown, openand short-circuit protection.
The MAX8647 features an I 2C serial port, while the MAX8648 features a three-wire serial-pulse logic interface.
Both devices support independent on/off and dimming for main and subbacklights.
The dimming ranges are pseudo-logarithmic from 24mA to 0.
1mA and off in 32 steps.
Bo...


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