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SC1408IS.TR Arkusz danych(PDF) 10 Page - Semtech Corporation |
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SC1408IS.TR Arkusz danych(HTML) 10 Page - Semtech Corporation |
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10 / 12 page ![]() 10 2005 Semtech Corp. www.semtech.com POWER MANAGEMENT SC1408 Typical Application Circuit (Cont.) Fig.3: Achieving output voltages greater than 16.5V + C8 100uF U1 SC1408CS 8 1 2 3 4 5 6 7 ISENSE GATE BST FB EN REF AGND GND C5 0.1uF C4 0.1uF + C3 100uF R2 0.05Ohm 3.3V IN D1 B130T L1 22uH Q1 IRL3103S R3 200k D4 1N4148 R4 10.0k D3 12V R6 470 + C2 100uF 25V OUT Fig.4: Implementing shutdown with input/output isolation + C3 100uF + C8 100uF D1 B130T SHORT = RUN OPEN = SHUTDOWN C5 0.1uF R3 90k + C2 100uF 12V OUT C4 0.1uF R4 10.0k R5 5.1k L1 22uH R2 0.05Ohm U1 SC1408CS 8 1 2 3 4 5 6 7 ISENSE GATE BST FB EN REF AGND GND Q1 IRLL3303 Q2 Si2301DS J1 1 2 3.3V IN |
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