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EUP2571VCIR1 Datasheet(PDF) 2 Page - Eutech Microelectronics Inc |
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EUP2571VCIR1 Datasheet(HTML) 2 Page - Eutech Microelectronics Inc |
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2 / 14 page  EUP2571 DS2571 Ver1.1 May. 2007 2 Typical Application Circuit (continued) Figure 2. 5V to 9V/300mA Step-Up Application Pin Configurations Package Type Pin Configurations Package Type Pin Configurations SOT23-5 SOT23-6 Pin Description PIN SOT23-5 SOT23-6 DESCRIPTION LX 1 1 Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. GND 2 2 Common Ground FB 3 3 Feedback Pin. Reference voltage is 0.25V. Connect cathode of lowest LED and resistor here. Calculate resistor value according to the formula: RFB=0.25/ILED EN 4 4 Chip Enable Pin. Connect to 1.4V or higher to enable device, 0.4V or less to disable device. IN 5 6 Input Supply Voltage OUT - 5 Overvoltage Sense. When VOUT is greater than 27V, the internal N-channel MOSFET turns off until VOUT drops below 25V, then the IC reenters start. Connect a 1uF capacitor from OUT to GND. |
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