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System Schematic Diagram

  • PFC
  • LLc & PSFB
  • Flyback
  • Synchronous Rectification
  • Forward
      • Excellent EAS capability and surge handling capability
      • Excellent dynamic characteristics
      • Lower reverse recovery time
      Voltage:550V~650V
      Product:GreenMOS
      Recommendation
      • Mid-low power products:Generic Series and E-Series GreenMOS, cost-effective and excellent dynamic characteristics
      • 2000W+ products and bridgeless PFC application:Z-Series GreenMOS,excellent switching performance
      Working Principle
    • Characteristics

      The common working modes of PFC(Power-Factor Correction) topology include CCM(Continuous Current Mode), DCM(Discontinuous Current Mode) and CRM(Critical Conduction Mode). PFC topology has a high requirement for MOSFET, and system stability should be improved as much as possible under the condition of ensuring system efficiency and temperature rise. The control loop speed of PFC topology is relatively slow. In order to smooth the AC rectified ripple between 100Hz and 120Hz, the reaction time of PFC topology must reach 10ms. Without special optimization of the control circuit and IC, PFC topology tends to produce a large shock current during the start-up process, which can reach 5-10 times of the normal operation. Especially in the repeated switching process, the MOSFET has a more severe test. MOSFET in PFC topology are bonded between high voltage and ground. The EAS capability of MOSFET is also an important reference to evaluate their reliability during safety testing. Therefore, when choosing MOSFET for PFC circuits, the switching characteristics (Ciss), EAS capability, surge resistance and electrostatic protection capability of MOSFET should be considered in particular.

      Product Category
      Power
      Product Name
      • Excellent dynamic characteristics
      • Lower reverse recovery time
      Voltage:550V~650V
      Product:GreenMOS
      Recommendation
      • Mid-low power products:Z-Series GreenMOS
      • High power products:SZ-Series GreenMOS
      Working Principle
    • Characteristics

      LLC&PSFB topology is commonly used in high-power resonant converters, which can greatly improve the efficiency of the converter. While significantly reducing switch losses, it can also have higher power density, and can be widely used in server power supply and EV charger, etc. The Z-series GreenMOS is a power MOSFET designed for this type of topology application, with extremely low Qg and a FRD different from conventional SJ MOSFET. While optimizing high-frequency characteristics, that is also a faster reverse recovery speed, which can greatly improve the reliability and efficiency of the system.

      Product Category
      Power
      Product Name
      • Excellent EAS capability and surge handling capability
      • Several types of package
      • OSS series:high power density and performance
      Voltage:600V~800V
      Product:GreenMOS
      Recommendation
      • Generic Series, E Series, and S Series GreenMOS
      • LED scheme for single stage PFC: GreenMOS: 700V~900V
      Working Principle
    • Characteristics

      The working modes of flyback switching power supply include CCM mode and DCM mode, it is suitable for low power applications such as LED lighting and battery chargers. GreenMOS can provide 600V~900V MOSFETs for flyback topologies and we have also developed the OSS series GreenMOS specifically for quick-charger applications. The OSS series GreenMOS has a lower Qg, faster switching speed, smaller miller plateau, lower Ciss, and optimized nonlinear Coss, which helps developers better solve EMI problems and has competitiveness comparable to GaN MOSFETs.

      Product Category
      Applications
      Product Name
      Adapter OSG65R900XF
      Adapter OSG65R760XF
      Adapter OSG65R580XF
      Adapter OSG65R380XF
      Adapter OSG65R290XF
      Single Stage PFC OSG70R500XF
      Single Stage PFC OSG70R350XF
      Single Stage PFC OSG80R650XF
      Single Stage PFC OSG80R380XF
      Quick Charge OSS60R340JF
      Quick Charge OSS65R099JF
      • Low switching loss
      • Excellent dynamic characteristics
      • High reliability and stability
      Voltage:550V~800V
      Product:GreenMOS
      Recommendation
      • Single-transistor forward: Generic Series, S-Series and E-Series GreenMOS with BV of 800V+
      • Two-transistor forward: Generic Series, S-Series and E-Series GreenMOS with BV of 550V+
      Working Principle
    • Characteristics

      There are two types of forward switching power supplies in hard switching applications: single-transistor forward and two-transistor forward. For the single-transistor forward, when the main switch MOSFET is turned off, the MOSFET will withstand a voltage twice the input voltage. Therefore, in this type of topology application, we recommend high BV MOSFETs to cope with the impact of voltage changes.

      The two-transistor forward type is a very stable topology structure with low operation frequency,which is usually applied in conjunction with PFC in 200W~800W adapters, industrial power supplies, computer power supplies, or applications with relatively harsh environments and high stability requirements. In applications, we recommend GreenMOS with smaller thermal resistance and better switching characteristics as the preferred choice.


      Product Category
      Applications
      Product Name
      Single-transistor forward OSG70R750FF
      Single-transistor forward OSG70R500FF
      Single-transistor forward OSG70R350FF
      Single-transistor forward OSG80R900FF
      Single-transistor forward OSG80R650FF
      Single-transistor forward OSG80R380FF
      Single-transistor forward OSG80R250FF
      Two-transistor forward OSG55R580FF
      Two-transistor forward OSG55R380FF
      Two-transistor forward OSG55R290FF
      Two-transistor forward OSG55R190FF
      Two-transistor forward OSG55R140FF

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