WHITE LED STEP-UP
CONVERTER
DESCRIPTION
The UTC L5100 is a STEP-UP DC/DC Converter and
designed for driving white LEDs with a constant current. It can drive
several LEDs in series by a Li-Ion cell. UTC L5100 switches at a
high frequency 1.2MHz, so it can allow the use of tiny external
components. The output capacitor can be as small as 0.22μF; saving
space and cost compare with alternative other solutions. The low
95mV feedback voltage minimizes power loss in the current setting
resistor can have better efficiency.
FEATURES
* Inherently Matched LED Current
* High Efficiency: 83% Typical
* Drives Up to Four LEDs from a 3.2V Supply
* Drives Up to Six LEDs from a 5V Supply
* 36V Rugged Bipolar Switch
* 1.2MHz Switching Frequency
* Uses Tiny 1mm Tall Inductors
* Output Capacitor can be small to only 0.22μF