供应G5121TP1U，固定频率白光LED升压转换器，应用在适用于PDA的白色LED背光显示器、掌上电脑、智能手机、手持装置、移动电话。

　　General Description

　　The G5121 is a step-up DC/DC converter specifically designed to drive up to 5 series white LEDs with constant current. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminates the need for ballast resistors. The G5121 switches at 1MHz, allowing the use of tiny external components. A low 0.254V feedback voltage minimizes power loss in the current setting resistor for high efficiency. The OVP pin monitors the output voltage and turns off the converter whenever the LEDs are open.

　　Features

　　► Inherently Matched LED Current

　　► High Efficiency: 87%

　　► Drives Up to Five LEDs from 2.5V Supply

　　► 24V Internal Power Switch

　　► Fast 1MHz Switching Frequency

　　► Uses Tiny 1mm Tall Inductors

　　► Requires Only 1μF Output Capacitors

　　► 19.5V Over Voltage Protection