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MAX8647 - (MAX8647 / MAX8648) Ultra-Efficient Charge Pumps

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.

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. Both devices include a temperature derating function to safely allow bright 24mA full-scale output current setting while automatically reducing current to protect LEDs at high ambient temperatures above +60°C. The MAX8647/MAX8648 are available in.

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Datasheet preview – MAX8647

Datasheet Details

Part number MAX8647
Manufacturer Maxim Integrated Products
File Size 307.69 KB
Description (MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
Datasheet download datasheet MAX8647 Datasheet
Additional preview pages of the MAX8647 datasheet.

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Full PDF Text Transcription

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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.
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