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AP3029 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AP3029 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 16 page  1 Oct. 2009 Rev. 1. 8 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER AP3029 General Description The AP3029 is an inductor-based DC/DC converter designed to drive up to six 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. In fact, 1mm tall inductor and 0.22µF output capacitor for a typical application is suf- ficient. Additionally, the schottky diode in boost circuit is integrated on this chip. AP3029 also provides a dis- able pin to ease its use for different systems. The over output voltage protection is equipped in AP3029. When any LED is broken or in other abnor- mal conditions, the output voltage will be clamped. The AP3029 is available in standard SOT-23-6 and TSOT-23-6 packages. Features · Inherently Uniform LED Current · High Efficiency up to 83.5% · No Need for External Schottky Diode · Over Output Voltage Protection · Fast 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 AP3029 SOT-23-6 TSOT-23-6 |
Similar Part No. - AP3029_09 |
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Similar Description - AP3029_09 |
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