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
TYPICAL APPLICATION CIRCUITS
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