AP3019AKTR-G1 LED Driver IC 1 Output DC Regulator PWM Dimming 550mA TSOT-23-6

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. A constant frequency 1.2MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall inductor and 0.22μF 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 0.22μF Output Capacitor

Pin Assignments

Applications

 Cellular Phones

 Digital Cameras

 LCD Modules

 GPS Receivers

 PDAs, Handheld Computers

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