aux_3ph_se_flyback_cntl_ic
Three phase Single-end Flyback with RCD snubber (Controller IC version)
Description
Flyback topologies are the most common and widely used topologies in auxiliary power supply design. Fly-back converter could be single phase as well as three phase types. Fly- back is most commonly used due to its simplicity in design and control, less components, low cost solution, and built-in galvanic isolation.
Single end fly-back is typically used for the power supplies < 250W.
Overview
An overview of relevant components, power class and topologies is shown in below table.
Circuit
Key Products
| Product Category | Product family | Product Number | Remark |
|---|---|---|---|
| Controller | QR | BD768xFJ-LB series | SOP-J8, Low current consumption (19µA), during standby, Gate-clamp circuit |
| Discrete MOSFET | SiC 1700V | SCT2H12NZ | TO-3PFM, Rds_on= 1.15Ω |
| SiC 1700V | SCT2H12NY | TO-268-2L, Rds_on= 1.15Ω | |
| SiC 1700V | SCT2750NY | TO-268-2L, Rds_on= 750 mΩ | |
| Diode (D1) Secondary Rectifier |
Schottky Barrier Diodes | RBQ /RBxx8 series | Ultra low IR SBD is suitable for rectification purpose, RBxx8 series has wide range of voltage choise |
| Diode (Ds) Snubber |
1700V | - | - |
Simulation
C-010. DC-DC Flyback Converter Vin=800V, Vo=25V, Io=10A