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Rohm Referencedesigns

REFACDC014 - Reference Design

Non-Isolated Buck Convertor 7.2 W 12 V Output 65kHz

This reference uses BM2PAA1Y-Z.

  • 1.Adjustable Output Voltage with External Resistor
  • 2.Frequency 65kHz
  • 3.Internal Start up Circuit 730V(peak)
  • 4.Internal Super Junction FET 730V(peak) (Ron = 1.2Ω)
  • 5.Internal Current Sense Resistor (Detection Current 1.76A)
  • 6.Contributes to Low EMI by Internal Hopping Function


Design Resources



Board Number Input Voltage Range Input Frequency Output Voltage Maximum Output Power Output Current Range Stand-by Power Efficiency Output Ripple Voltage Size Operating Temperature
BM2PAA1Y-EVK-001 90 to 264Vac 47 to 63Hz 12.0V(Typ.) 7.2W 0 to 0.6A *1 230mW Iout=0A 0.79 100mVpp *2 70mm 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
BM2PAA1Y-EVK-001 Mouser Electronics Inc. 5
Chip One Stop, Inc. 2
CoreStaff Co., Ltd. 2
DigiKey 2
Ameya Holding Limited 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
BM2PAA1Y-EVK-001 BM2PAA1Y-Z AC/DC Converters ICs - Recommended - - - -
BM2PAA1Y-EVK-001 RFU02VSM6S Fast Recovery Diodes - Recommended - - - - -