The BD7F100EFJ-LBE2 is an optocoupler less isolated flyback converter in 8 pin HTSOP package. It provides long time supply availability in industrial instrumentation market. An optocoupler or tertiary winding feedback circuit which was needed to obtain a stable output voltage isolated by a transformer in conventional application becomes unnecessary thus the number of parts is reduced drastically by producing small sized and high reliability application isolated type power supply. The output voltage can be set by two external resistors and the transformer turns ratio. The use of original adapted type ON time control technology makes the external phase compensation parts become unnecessary, therefore a highly efficient isolated type power supply application can easily be produced. The device includes protection features such as VIN under voltage lock out (VIN UVLO), over current protection (OCP) and thermal shutdown protection (TSD).
Supply voltage of operation of 3V to 40V and maximum SW terminal operating voltage of 50V
No need for an optocoupler or a transformer tertiary winding
High speed load response is realized and external phase compensation parts are unnecessary
Fixed switching frequency of 400KHz and low output ripple
Highly efficient light load mode available (PFM operation)
Shutdown/enable control, built-in N-channel MOSFET and soft start function
Output load compensation function
Over current limit of 1.25A and reference voltage accuracy of ±1.5%
Maximum quiescent current of 10µA and operating current of 2mA
Junction temperature of operation from -40°C to +125°C
