This design note describes a circuit with low startup current less than 0. Using an op amp to amplify the current-sense signal can reduce cost and improve noise performance and efficiency. The power stage performs the basic power conversion from the input voltage to the output voltage and includes switches and the output filter. Simplified equations are used to develop obtainable ranges for parameters over IC tolerances.
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UC3844N PDF Datasheet浏览和下载
UC3844D8,UC3844N,UC3845,UC3845A DataSheet PDF Datenblatt