AP3019 - BCD Semiconductor

AP3019 WHITE LED STEP-UP CONVERTER

The AP3019 is an inductor-based DC/DC converter designed to drive up to five white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain satisfied brightness. A constant frequency 1.0MHz PWM control scheme is employed in this IC, which means the tiny external components can be used. In fact, 1mm tall inducto.

Features

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· Inherently Uniform LED Current High Efficiency up to 84% No Need for Extra Schottky Diode Over Output Voltage Protection Drives 2 to 5 LEDs Fast 1.0MHz Switching Frequency Uses Tiny 1mm Tall Inductor Requires Only 0.22µF Output Capacitor Applications
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· Cellular Phones Digital Cameras LCD modules GPS Receivers PDAs, Handheld Computers SOT-23-6 Figure 1. Package Type of AP3019 Apr. 2007 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Pin Configuration K Package (SOT-23-6) AP3019 VOUT GND FB 1 2 3 6 5 4 SW VI.