GENERAL DESCRIPTION
PC112/PC113 is a compact, high-efficiency step-up DC-DC converter which drives 2-6 series white LEDs with constant current from 3V to 5V. Extremely low shutdown power supply current ensures the high efficiency of battery system. Low feedback voltage and hence minimal input current from the battery extends battery life. Built-in N-channel power switches optimize the layout area of PCB. Since PC112/PC113 drives series LEDs, it regulates the light intensity uniformly. While output loading is open, likes the case of LEDs failure, the duty cycle of the DC-DC converter will increase rapidly, causing high output voltage to damage the circuit. To avoid this situation, a Zener diode should be connected to the DC-DC converter’s output to clamp the output voltage in most applications. PC112/PC113 is also characterized of the soft-start feature, which limits the inrush current. It is available in Thin-SOT type package. FEATURES
1. Typical 85% efficiency 2. No external power switch 3.
SITI
