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Rohm Referencedesigns

REFACDC001 - Reference Design

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)


Design Resources



Board Number Input voltage Input Frequency Output voltage Output current Range Maximum output power Power supply efficiency Output ripple voltage Size Operating Temperature
BM2PAB1Y-EVK-003 90 to 264Vac 47 to 63Hz 20V(Typ.) 0.02A to 0.4A *1 8W 85.3%(Typ.) 0.05Vpp(Typ.) *2 90mm x 30mm -10 to 65deg.C
*1 Please adjust operating time, within any parts surface temperature under 105 °C
*2 Not include spike noise

Distribution Inventory

Board Number Distributor Quantity Available
BM2PAB1Y-EVK-003 Mouser Electronics Inc. 3
CoreStaff Co., Ltd. 2
DigiKey 2
Ameya Holding Limited 1
Chip One Stop, Inc. 1
Xiamen Oneyac Technology 1

Key Components

Board Number Part Number Product Category Datasheet Status SPICE LTspice® ? Thermal Model Symbol & Footprint 3D STEP Samacsys ECAD Library Calc Tool ROHM Solution Simulator
BM2PAB1Y-EVK-003 BM2PAB1Y-Z AC/DC Converters ICs - Recommended - - - -
BM2PAB1Y-EVK-003 RFN1LAM6S Fast Recovery Diodes - Recommended - - - - -
BM2PAB1Y-EVK-003 RRE02VSM6S Standard Rectifier Diodes - Recommended - - - - -