BD7F100 Optocoupler-less Isolated Flyback Converters

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            BD7F100 Optocoupler-less Isolated Flyback Converters
                    ROHM offers its BD7F100 optocoupler-less isolated flyback converters for industrial equipment isolated power supply applications
    

Image of ROHM Semiconductor's BD7F100 Optocoupler-less Isolated Flyback Converters ROHM Semiconductor's BD7F100 is an optocoupler-less isolated flyback converter. An optocoupler, or the tertiary winding feedback circuit, which was needed to obtain a stable output voltage isolated by a transformer in the conventional application becomes unnecessary; thus, the number of parts is reduced drastically, producing a small-sized and high-reliability application-isolated type power supply.

It uses original adapted-type ON-time control technology to realize high-speed load response making external phase compensation parts unnecessary; therefore, a highly efficient, isolated type power supply application can easily be produced.

Features
Guaranteed long time supply availability for industrial applications No need for an optocoupler or a transformer tertiary winding The output voltage can be set by two external resistors and the transformer turns ratio Uses original adapted type ON-time control technology High-speed load response is realized and external phase compensation parts are unnecessary Fixed switching frequency and low output ripple		Highly efficient light load mode available (PFM operation) Shutdown / enable control Built-in N-channel MOSFET Soft start function Output load compensation function Protection functions: V_IN under voltage lock-out (V_IN UVLO) Over-current protection (OCP) Thermal shutdown protection (TSD)