Anachip AP1521
The AP1521 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion cell. The AP1521 switches at 1MHz that allows the use of tiny external components.| Part No. | AP1521 |
|---|---|
| Datasheet | AP1521 Download |
| Manufacturer |  Anachip |
| Description | White LED Step-Up Converter |
| Buy | Stock & Price |
FEATURES
- Inherently Matched LED Current - Drives Up to Four LEDs from a 3.2V Supply - Drives Up to Six LEDs from a 5V Supply - High Efficiency: 84% Typical - Fast 1MHz Switching Frequency - 36V Rugged Bipolar Switch - Low Profile SOT23-5 Pb-Free Packaging APPLICATIONS
- Cellular Phones - PDAs, Hand-held Computers - Digital Cameras - MP3 Players - GPS Receivers Pin Assignments Top View VIN SHDN SW VSS FB SOT23-5L GENERAL DESCRIPTION
Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminates the need for ballast resistors. A low 300mV feedback voltage minimizes power loss in the current setting resistor for better efficiency. Pin
