Datenblatt-Suchmaschine für elektronische Bauteile |
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FAN5608MPX Datenblatt(PDF) 2 Page - Fairchild Semiconductor |
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FAN5608MPX Datenblatt(HTML) 2 Page - Fairchild Semiconductor |
2 / 17 page PRODUCT SPECIFICATION FAN5608 2 REV. 1.0.3 6/28/04 external resistor to set the current, and to turn the device ON and OFF. The FAN5608DMPX/FAN5608MPX is available in an 8-lead MLP package with or without an internal Schot- tky diode. The FAN5608DHMPX is available in a 12-lead MLP package with an internal Schottky diode. Typical Application (Continued) 3X3mm MLP-8 Package with internal Schottky diode Order Code: FAN5608DMPX 3X3mm MLP-8 Package with external Schottky diode Order Code: FAN5608MPX IND R R VIN VEXTERNAL VOUT IND A1 A2 GND CH2 CH1 2.7V TO 5V L = 4.7 µH CIN 4.7 µF IND R R VIN VEXTERNAL NC VOUT IND A1 A2 GND CH2 CH1 2.7V TO 5V L = 4.7 µH 4.7 µF CIN Analog Brightness Control Definition of Terms Output Current Accuracy: reflects the difference between the measured value of the output current (LED) and programmed value of this current. Current Matching: refers to the absolute value of difference in current between the two LED branches. Efficiency: is expressed as a ratio between the electrical power into the LEDs and the total power consumed from the input power supply. Although this definition leads to a lower value than the boost converter efficiency, it more accurately reflects better system per- formance, from the user’s point-of-view. Output Current Accuracy (%) I OUT measured I OUT programmed – () 100 × I OUT programmed ------------------------------------------------------------------------------------------------------------ = Current Matching (%) I LED branch 1 I LED branch 2 – () 100 × I LED branch 1 I LED branch 2 + () 2 ⁄ ----------------------------------------------------------------------------------------------- = Efficiency (%) V LED branch 1 I LED branch 1 × V LED branch 1 I LED branch 1 × + () 100 × V IN I IN × -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- = |
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