ANALOG DEVICES LT3591EDDB#TRPBF

LT3591 is a fixed frequency step-up DC/DC converter specifically designed to drive upto ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. This device features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler one wire LED connection. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string. The high switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. It is used in application such as cellular phones, PDAs, handheld computers, digital cameras, MP3 players, GPS receivers etc.