NCP1421LEDEVB ON Semiconductor, NCP1421LEDEVB Datasheet
NCP1421LEDEVB
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NCP1421LEDEVB Summary of contents
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... NCP1421/2 Reference Designs for High−Power White LED Flash Applications Prepared by: Jim Hill ON Semiconductor Abstract The attached design illustrates how the NCP1421/2 boost converters can be configured as a current regulator for biasing high current white LED’s. Typical boost converters, such as these, have a reference voltage of 1.2 V. Since this is a current sourcing application, the more straightforward approach of directly sensing the boost converter’ ...
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V 0 3.0 3.2 3.4 3.6 INPUT VOLTAGE (V) Figure 2. Output Current vs. Input Voltage 100 200 mA 80 600 ...
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Finally, Figure 5 shows a Focus/Flash application where the NCP1422 drives one LED at 200 and 600 mA R4a Q1 ON R4b OFF 50 ms Pulse Figure 5. 200/600 mA Focus/Flash Application V = 3.6 ...
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... V (X5R Ceramic) 0805 6.3 V (X5R Ceramic) 0805 http://onsemi.com 4 Manufacturer ON Semiconductor Lumileds TDK Vishay Vishay Vishay Vishay TDK TDK TDK ON Semiconductor Lumileds TDK / Coilcraft Vishay Vishay Vishay Vishay TDK TDK TDK ON Semiconductor Lumileds TDK Vishay Vishay Vishay Vishay TDK TDK TDK ...
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... SC−88 6.8 mH Inductor (5.6 x 5.0 x 1.0 mm) 100 kW 0402 475 kW 0402 100 kW 0402 1.0 W 1206 2.0 W 1206 220 nF 0603 6.3 V (X5R Ceramic) 0805 6.3 V (X5R Ceramic) 0805 http://onsemi.com 5 ON Semiconductor Lumileds ON Semiconductor TDK Vishay Vishay Vishay Vishay Vishay TDK TDK TDK ...
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... Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com AND8171/D N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 6 ON Semiconductor Website: http://onsemi ...