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

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-0790; Rev 0; 4/07 Ultra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin.

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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.

Key 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.

More Datasheets from Maxim Integrated (now Analog Devices)

Part Number Description
MAX8640Y 4MHz/2MHz Synchronous Step-Down DC-DC Converters
MAX8640Z 4MHz/2MHz Synchronous Step-Down DC-DC Converters
MAX8643 2MHz Step-Down Regulator
MAX8643A 2MHz Step-Down Regulator
MAX8645X 1x/1.5x/2x White LED Charge Pumps
MAX8645Y 1x/1.5x/2x White LED Charge Pumps
MAX8646 2MHz Step-Down Regulator
MAX8648 (MAX8647 / MAX8648) Ultra-Efficient Charge Pumps
MAX8649 1.8A Step-Down Regulator
MAX8600 Single-/Dual-Input 1-Cell Li Chargers