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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM2599 датащи(PDF) 28 Page - National Semiconductor (TI) |
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LM2599 датащи(HTML) 28 Page - National Semiconductor (TI) |
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28 / 31 page  Application Information (Continued) quirement however, that there be a minimum load of 1.2A on the regulated positive output for the charge pump to work correctly. Also, resistor R1 is required to limit the charging current of C1 to some value less than the LM2599 current limit (typically 4.5A). This method of generating a negative output voltage without an additional inductor can be used with other members of the Simple Switcher Family, using either the buck or boost topology. TYPICAL THROUGH HOLE PC BOARD LAYOUT, FIXED OUTPUT (1X SIZE), DOUBLE SIDED DS012582-48 FIGURE 31. Charge Pump for Generating a Low Current, Negative Output Voltage DS012582-51 CIN: — 470 µF, 50V, Aluminum Electrolytic Panasonic, “HFQ Series” COUT: — 330 µF, 35V, Aluminum Electrolytic Panasonic, “HFQ Series” D1: — 5A, 40V Schottky Rectifier, 1N5825 L1: — 47 µH, L39, Renco, Through Hole RPULL UP: — 10k CDELAY: — 0.1 µF CSD/SS: — 0.1 µF Thermalloy Heat Sink #7020 www.national.com 28 |
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