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REFACDC027 - Reference Design

Isolation Fly-back Converter PWM method Output 48 W 12 V

The BM2P016T-EVK-003 evaluation board outputs a 12V voltage from an input of 90Vac to 264Vac. The output current provides up to 4.0A. The BM2P016T PWM type DC / DC converter IC with 650V MOSFET is used.

  • The BM2P016T contributes to low power consumption by incorporating a 650V withstand voltage startup circuit.
  • Using current mode control, cycle-by-cycle current limiting provides excellent performance in bandwidth and transient response.
  • The switching frequency is fixed at 65kHz. At light loads, frequency reduction achieves high efficiency.
  • Built-in frequency hopping function contributes to low EMI. The low on-resistance 1.4Ω · 650V withstand voltage MOSFET is built in, contributing to low power consumption and easy design.
  • The optimized EMI design complies with CISPR 22 Class B for noise terminal voltage / radiation emission testing.


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
BM2P016T-EVK-003 90 to 264Vac 47 to 63Hz 12V(Typ.) 48W Iout=4A 0 to 4A *1 135mW Iout=0A 0.862 100mVpp *2 55mmx105mm -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
BM2P016T-EVK-003 Mouser Electronics Inc. 3
CoreStaff Co., Ltd. 2
DigiKey 2
Ameya Holding Limited 1
Inquiry 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
BM2P016T-EVK-003 BM2P016T AC/DC Converters ICs - Recommended - -
BM2P016T-EVK-003 RFN1LAM7S Fast Recovery Diodes - Recommended - - - - -
BM2P016T-EVK-003 RRE02VSM4S Standard Rectifier Diodes - Recommended - - - - -
BM2P016T-EVK-003 RB218T100NZ Schottky Barrier Diodes - Active - - - Solution Simulator