Optocoupler-less Isolated Flyback Converter - BD7F100HFN-LB

This product guarantees long time supply availability in the industrial instrumentation market. BD7F100HFN-LB 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. Furthermore, a highly by the use of the Original Adapted-Type ON-Time Control Technology, it makes the external phase compensation parts become unnecessary, therefore a highly efficient isolated type power supply application can easily be produced.

Part NumberStatusPackageUnit QuantityMinimum Package QuantityPacking TypeRoHS
BD7F100HFN-LBTRActiveHSON830003000TapingYes

BD7F100HFN-LB Data Sheet

Specifications
FETIntegrated
Controller TypePWM
Output Power [W]1W@Vin=5.0V 5W@Vin=24V
Switch Current Limit(Typ.)[A]1.25
Vin1(Min.)[V]3.0
Vin1(Max.)[V]40.0
SW frequency(Max.)[MHz]400.0
Channel1
Light Load modeYes
ENYes
Soft StartYes
Thermal Shut-downRecovery
Under Voltage Lock OutYes
Operating Temperature (Min.)[°C]-40
Operating Temperature (Max.)[°C]125
Technical Documents
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:
    VIN Under Voltage Lock-Out (VIN UVLO)
    Over Current Protection (OCP)
    Thermal Shutdown Protection (TSD)
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