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REFACDC025 - Reference Design

Isolation Fly-back Converter PWM method Output 24W 12V

ROHM BM2P0161-EVK-003 is from wide input voltage (90Vac to 264Vac) to output 12V 2A max. Constant Voltage Reference board. It used to PWM method DC/DC Converter IC BM2P0161.

  • BM2P0161 is including 650V High voltage power MOSFET and starter. The starter realize low Stand-by Power.
  • Output voltage control method is used current mode regulation, therefore it can used cycle by cycle current limit. Quick response in dynamic load changing is achieved.
  • Switching frequency is fixed 65kHz. Light load situation has frequency decrease function for higher efficiency.
  • Switching frequency jitter function enables lower EMI operation.
  • Various functions are included for safety, Soft start, Frequency Burst Mode, VCC OVP, Output OLP and thermal shut down.


Design Resources



Board Number Input Voltage Range Input Frequency Output Voltage Maximum Output Power Output Current Range Stand-by Power Efficiency Output Ripple Voltage Operating Temperature
BM2P0161-EVK-003 90 to 264Vac 47 to 63Hz 12V(Typ.) 24W Iout=2A 0 to 2A *1 73mW Iout=0A 86% OutPut:24V 1.5A 190mVpp BW=20MHz *2 Ta=25℃
*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-003 Mouser Electronics Inc. 4
Chip One Stop, Inc. 2
CoreStaff Co., Ltd. 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-003 BM2P0161-Z AC/DC Converters ICs - Recommended - - - -
BM2P0161-EVK-003 RFN1LAM7S Fast Recovery Diodes - Recommended - - - - -
BM2P0161-EVK-003 RRE02VSM4S Standard Rectifier Diodes - Recommended - - - - -
BM2P0161-EVK-003 RB088BGE150 Schottky Barrier Diodes - Recommended - - -