AF5121 Overview
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 the use of tiny external ponents.
AF5121 Key Features
- Inherently Matched LED Current
- High Efficiency:82%
- Drives Up to Six LEDs from 2.2V
- 20V Over Voltage Protection
- Fast 1.4MHz Switching Frequency
- Requires Only 1μF Output Capacitors
- SOT-23-6 Package