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The AP3030 is an inductor-based DC/DC converter designed to drive up to eight white °Cs in series or 2 rows of °Cs with 5 for each in parallel for backlight. Only one feedback resistor is needed to control the °C 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 0.22mF 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 °C is broken or in other abnormal conditions, the output voltage will be clamped.
· Inherently Uniform °C 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 0.22mF Output Capacitor
· Cellular Phones · Digital Cameras · LCD modules · GPS Receivers · PDAs, Handheld Computers
