丝印：1239N065；Package：SOIC-7；Fixed Frequency Current‐Mode Controller for Flyback Converter

The NCP1239 is a fixed-frequency current-mode controller featuring a high-voltage start-up current source to provide a quick and lossless power-on sequence. This function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal start-up current sou

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