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AP3030 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AP3030 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 13 page  WHITE LED STEP-UP CONVERTER AP3030 1 Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited Preliminary Datasheet General 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 com- 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 abnor- mal conditions, the output voltage will be clamped to 30V. The AP3030 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) · Drives up to 8 LEDs in Series or 2 Rows of LEDs with 5 for Each in Parallel · 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 Computers Figure 1. Package Types of AP3030 SOT-23-6 TSOT-23-6 |
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