LT3491EDC#TRMPBF - 

制造商：

LINEAR TECHNOLOGY LINEAR TECHNOLOGY

制造商产品编号：

LT3491EDC#TRMPBF

仓库库存编号：

1715220RL

技术数据表：

(EN)

The LT3491EDC#TRMPBF is a fixed frequency step-up DC/DC Converter specifically designed to drive up to six 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. The device features 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 2.3MHz switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control.

• Internal Schottky diode
• One pin dimming and shutdown
• ±5% Reference accuracy
• Requires only 1μF output capacitor
• High-side sense allows 'one wire current source'