AP3030 Datasheet | BCD Semiconductor

Description The AP3030 is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series or 2 rows of LEDs with 5 for each in parallel for backlight. Only one feedback resistor is needed to control the LED current and obtain required brightness. 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 0.22µF output capacitor for a typical application are sufficient. Additionally, the schottky diode in boost circuit is integrated on this chip. AP3030 also provides a disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3030. When any LED is broken or in other abnormal conditions, the output voltage will be clamped. The AP3030 is available in standard SOT-23-6 and TSOT-23-6 packages. AP3030 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 0.22µF Output Capacitor Applications - - - - - Cellular Phones Digital Cameras LCD modules GPS Receivers PDAs, Handheld puters .. SOT-23-6 TSOT-23-6 Figure 1. Package Types of AP3030 Oct. 2009 Rev. 1. 6 1 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Pin Configuration K/KT Package (SOT-23-6/TSOT-23-6) Pin 1 Dot by Marking SW GND FB 1 2 3 6 5 4 VIN VOUT CTRL Figure 2. Pin Configuration of AP3030 (Top View) Pin Description Pin Number 1 2 3 4 5 .. 6 Pin Name SW GND FB CTRL VOUT VIN Switch Pin. Connect external inductor Ground Voltage Feedback. Reference voltage is 200m V Shutdown and Dimming Pin. Connect to 1.8V or higher to enable device; Connect to 50m V or less to disable device; Connect to a voltage between 1.8V and 50m V to achieve linear dimming Output Pin. Connected to the cathode of internal schottky diode Input Supply Pin. Must be...