Reference Design

A system-level evaluation board that combines ROHM's IC and discrete products. We have already solved not only the characteristics of individual products but also the problems that may occur when combining them to build a system, thus contributing significantly to the reduction of development time for our customers.

Built-in SiC MOSFET Isolated Fly-back Converter QR method Output 48W 24V Reference Design


This reference design uses BM2SC12xFP2.
(1) Built-in 1700 V SiC MOSFET
(2) Wide input voltage range by SiC MOSFET: DC = 300 V to 900 V, AC = 210 Vac to 480 Vac
(3) High power surface mount type package TO263-7L.
(4) This is a ranked product that guarantees a long-term supply for the industrial equipment market.

About BM2SC123FP2-LBZ

  • Long Time Support Product for Industrial Applications
  • TO263-7L Package
  • Built-in 1700 V/9.2 A/1.15 Ω SiC-MOSFET
  • Quasi-resonant Type
  • Frequency Reduction Function
  • Low Current Consumption (19 µA) during Standby
  • Burst Operation at Light Load
  • SOURCE Pin Leading Edge Blanking
  • VCC UVLO (Under Voltage Lockout protection)
  • VCC OVP (Over Voltage Protection)
  • Over Current Protection Circuit per Cycle
  • Soft Start Function
  • ZT Pin Trigger Mask Function
  • ZT OVP (Over Voltage Protection)
  • BR UVLO (Under Voltage Lockout Protection)


Reference Board NameBM2SC123FP2_EVK_001
Input Voltage Range(DC)300 to 900V
Input Voltage Range(AC)210 to 480Vac
Input AC Frequency47 to 63Hz
Output Voltage24.0V(Typ)
Maximum Output Power48W Io=2A
Output Current Range0.0 to 2.0A*1
Stand-by Power310mW Io=0A
Efficiency91% Io=2A,Vin=300V(DC)
Output Ripple Voltage200mVpp(Max)*2
Operating Temperature Range-10 to 65deg.C

*1 Adjust operating time, within any parts surface temperature under 105°C
*2 Not include spike noise

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Application examples

Product nameSpiceUn-encrypted Spiceweb simsymbol&
3D Modelthermal
Calc toolEVK, Eval board for individual product

Design Data