AP3019A Datasheet | Diodes Incorporated

NEW PRODUCT WHITE LED STEP-UP CONVERTER Description The AP3019A is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain required brightness. Pin Assignments (Top View) Pin 1 Mark A constant frequency 1.2MHz PWM control scheme is employed in this IC, which means tiny external ponents can be used. Specifically, 1mm tall inductor and 0.22F output capacitor for a typical application is sufficient. Additionally, the Schottky diode in boost circuit is integrated on this chip. The AP3019A also provides a disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3019A. When any LED is broken or in other abnormal conditions, the output voltage will be clamped. The AP3019A is available in standard SOT-23-6 and TSOT-23-6 packages. Features - Inherently Uniform LED Current - High Efficiency up to 84% - No Need for External Schottky Diode - Output Over-voltage Protection (OVP) - Fixed 1.2MHz Switching Frequency - Uses Tiny 1mm Tall Inductor - Requires only 0.22F Output Capacitor SW 1 GND 2 FB 3 6 VIN 5 VOUT 4 CTRL K/KT Package (SOT-23-6/TSOT-23-6) Applications - Cellular Phones - Digital Cameras - LCD Modules - GPS Receivers - PDAs, Handheld puters Document number: DS41298 Rev. 3 - 2 1 of 12...