L1937 Datasheet (UTC) - WHITE LED STEP-UP CONVERTER

L1937, WHITE LED STEP-UP CONVERTER

The UTC L1937 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.

Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the n

L1937 Features

* Inherently Matched LED Current

* High Efficiency: 84% Typical

* Drives Up to Four LEDs from a 3.2V Supply

* Drives Up to Six LEDs from a 5V Supply

* 36V Rugged Bipolar Switch

* Fast 1.2MHz Switching Frequency

* Uses Tiny 1mm Tall Inductors

* Requires Only 0.22 F Out