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.

Non-Isolated PWM type Buck Convertor 8W 20V Output


non-isolated from inputs from 90 Vac to 264 Vac, with an output maximum current of 0.4A It was developed mainlu for power supplie for IH cookers and IH cookers. The non-insulated output can be used as a power supply for control of inverters,etc. A PWM controller for AC/DC power supplies,the BM2PAB1Y provides the ideal system for small appliances with outlets.


  • Half-wave rectified input, Simple noise filter , High efficiecny (85.3% typ)

Key Specification

Name of boardBM2PAB1Y-EVK-003
Input voltage90V to 264Vac
Nb of outputs1 channel
Output voltage20V
EMC perfomanceSatisfy CISPR 32 Class B regulation
Dimension90mm x 30mm


IH Rice cooker, IH cooker ,small appliances with outlets.


Reference Board Image

Product in refDesign and related contents

Product nameSpiceUn-encrypted Spiceweb simSymbol&Footprint3D ModelThermal ModelCalc toolEval board for individual product

Design files