AT1313 Datasheet | Aimtron Technology

Feature - Operating Voltage:2.5V~5.5V - High Operating Frequency: 1.4MHz - High Output Voltage: Up to 18V - Shutdown Current <1µA - 18V Output Over-voltage protection - Digital Dimming Control. - Built-in Cycle-by Cycle Current-limiting. - Built-in Soft-Start Function. - 0.2V Low Reference Voltage - Tiny SOT-26 Package Description The AT1313 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.4 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor. The AT1313 is available in 6-pin SOT-26 packages Application - LED Module - pact Back Light Module - Constant Current Source Block Diagram LX ON/OFF Control Logic / PWM Dimming Control VREF + Control Logic FB 18V VBG + Overvoltage Protection CTL N VREF 0.2V VBG 1.23V Soft-Start Current Limit 1.2A + - CTL Aimtron reserves the right without notice to change this circuitry and specifications. 7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 : http://.aimtron..tw 10/31/2006 REV:2.0 Email:service@aimtron..tw 1 High Efficiency, Constant Current White-LED Driver Pin Configuration Ordering Information Part number AT1313X_GRE : Date Code - For more marking information, contact our sales representative directly Package SOT-26, Green Marking 313, Date Code with one bottom line Pin Description Pin N0. 1 2 3 4 5 6 Symbol LX GND FB EN OVP VIN...