The AT731 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current.
The device can drive two, three or four LEDs in series from a Li-lon cell.
Key Features
Inherently Matched LED Current High Efficiency: 84% Typical Drives Up to Four LEDs from a 3.2V Supply Drives Up to Eight LEDs from a 5V Supply 36V Rugged Bipolar Switch Fast 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductors Requires Only 0.22µF Output Capacitor.
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AT731. For precise diagrams, and layout, please refer to the original PDF.
AT731 White LED Step-Up Converter FEATURES Inherently Matched LED Current High Efficiency: 84% Typical Drives Up to Four LEDs from a 3.2V Supply Drives Up to Eight LEDs f...
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al Drives Up to Four LEDs from a 3.2V Supply Drives Up to Eight LEDs from a 5V Supply 36V Rugged Bipolar Switch Fast 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductors Requires Only 0.22µF Output Capacitor APPLICATION Cellular Phones PDAs, Handheld Computers Digital Cameras Mp3 Players GPS Receivers Immense Advance Tech. DESCRIPTION The AT731 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-lon cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating
AT731 Datasheet
