AF5121 Datasheet (AFSEMI) - Fixed Frequency White LED Step-Up Converter

AF5121, Fixed Frequency White LED Step-Up Converter

The AF5121 is a step-up DC/DC converter specifically designed to drive up to 6 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 AF5121 switches at 1.4MHz, allowing

AF5121 Features

* Inherently Matched LED Current

* High Efficiency:82%

* Drives Up to Six LEDs from 2.2V Supply

* 20V Over Voltage Protection

* Fast 1.4MHz Switching Frequency

* Requires Only 1μF Output Capacitors

* SOT-23-6 Package Applications

* Communication equipment

* Whit