1.4A BOOST FOR WHITE LED DRIVER

DESCRIPTION

The UTC L5104 is a high frequency, asynchronous boost
converter. The internal MOSFET can support up to 8 White LEDs
for backlighting and OLED power application, and the internal soft
start function can reduce the inrush current.
The UTC L5104 uses current mode, 1.0MHz fixed frequency
architecture to regulate the LED current, which is set through an
external current sense resistor. Its low 300mV feedback voltage
reduces power loss and improves efficiency. The OVP pin monitors
the output voltage and turns off the converter if an over-voltage
condition is present due to an open circuit condition. The UTC
L5104 includes under-voltage lockout, current limiting and thermal
shutdown protection preventing damage in the event of an output
overload.

FEATURES

* 2.5V~5.5V operating input voltage range
* Drives up to 8 series White LEDs
* 1.0MHz Fixed Switching Frequency
* Wide range for PWM dimming (200Hz~200KHz)
* Internal 1.4A switching current limit
* Over Voltage Protection (OVP)
* Internal Soft-start Function
* Current limit and Thermal shutdown protection
* Under voltage Lockout