Built-in Secondary-side Driver with Synchronous Rectification Active Clamp PWM Controller - BD8325FVT-M

BD8325FVT is a PWM controller intended for Active clamp, current-mode isolated switching regulator. This controller provides control outputs for driving primary-side MOSFET, and outputs with adjustable delay, which can be used for driving synchronous rectifier MOSFET on the secondary-side. Its maximum input voltage is 20V. External startup regulator can be set at high voltage.

número de peça
Estado de Condição
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
BD8325FVT-ME2 Active TSSOP-B30 2000 2000 Taping sim
Controller Type PWM
Vin1(Min.)[V] 8.0
Vin1(Max.)[V] 18.0
SW frequency(Max.)[MHz] 500.0
Channel 2
Light Load mode No
Soft Start Yes
Under Voltage Lock Out VCC / LINE
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
  • ・ Ideal for Active Clamp /Rest Forward/Flyback converter
    ・ Current-mode Control with Dual Mode Over-Current Protection
    ・ Synchronization to External Clock
    ・ Programmable Dead-Time (Turn-On/Turn-Off) between MAIN and AUX MOSFET by External Resistor
    ・ Have Control Outputs for Driving Primary Side MOSFET; Have Outputs with Adjustable Time for Driving Synchronous Rectifier MOSFET in Secondary Side (OUT2F, OUT2R pin)
    ・ Programmable Oscillator Frequency and Maximum Duty Cycle by External Resistor
    ・ Programmable Soft-Start Time by External Capacitor
    ・ Programmable Slope Compensation by External Resistor
    ・ A Variety of Protection First Over-Current Protection (Pulse-by-Pulse mode) Second Over-Current Protection (HICCUP mode) VCC_UVLO (Input Under-Voltage Protection) LINE_UVLO (Line Under-Voltage Protection)
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Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.