L5101 Description
The UTC L5101 is a fixed frequency step-up PWM DC/DC converter and designed for white LEDS driving with a constant current to provide backlight in handheld devices. The device switches at a high frequency 1.2MHz by an internal N-channel MOSFET switch to be capable of minimum external ponents using. The UTC L5101 can drive up to 5 LEDs in series by a Li-Ion cell.
L5101 Key Features
- Built-In Open Circuit Protection
- Built-In Over Voltage Protection
- High Efficiency(Up to 84% at VIN=4.2V, 3 LEDs, ILED =20mA)
- 1.2MHz fixed switching frequency
- Low supply current: 70µA
- Matches LED current
- Requires tiny inductor and capacitors