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REFACDC018 - Reference Design

Non-Isolation Buck Converter PWM method Output 7.5W 15V

The BM2P0161-EVK-001 evaluation board outputs 15V voltage from the input of 90Vac to 264Vac. The output current supplies up to 0.5A. BM2P0161 which is PWM method DC/DC converter IC built-in 650V MOSFET is used.

  • The BM2P0161 contributes to low power consumption by built-in a 650 V starting circuit.
  • Current mode control imposes current limitation on every cycle, providing superior performance in bandwidth and transient response. The switching frequency is 65 kHz in fixed mode.
  • At light load, frequency is reduced and high efficiency is realized. Built-in frequency hopping function contributes to low EMI.
  • Low on-resistance 1.0 Ω 650 V MOSFET built-in contributes to low power consumption and easy design.
  • The flywheel diode is a fast recovery diode of 3A/600 V RFN3BM6S, contributing to low power consumption.
  • The conduction / radiation emission test is based on CISPR 22 Class B with best EMI design.


Design Resources



Board Number Input voltage Input Frequency Output voltage Maximum output power Output current range Stand-by Power Efficiency Output ripple voltage Size Operating Temperature
BM2P0161-EVK-001 90 to 264Vac 47 to 63Hz 15V(Typ.) 7.5W Iout=500mA 0 to 500mA *1 36mW Iout=0A 0.829 64mVpp *2 55mm x 80mm -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
BM2P0161-EVK-001 CoreStaff Co., Ltd. 3
DigiKey 3
Chip One Stop, Inc. 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
BM2P0161-EVK-001 BM2P0161-Z AC/DC Converters ICs - Recommended - - - -
BM2P0161-EVK-001 RRE02VSM6S Standard Rectifier Diodes - Recommended - - - - -