Rohm Breadcrumb

Rohm Referencedesigns

REFACDC013 - Reference Design

Non-Isolation Buck Converter PWM method Output 12 W 15 V

The BM2P151X-EVK-001 evaluation board outputs 15V voltage from the input of 90Vac to 264Vac. The output current supplies up to 0.8A. The BM2P151X which is PWM method DC/DC converter IC built-in 650V MOSFET is used.

  • The BM2P151X contributes to low power consumption by built-in a 650V starting circuit. Built-in current detection resistor realizes compact power supply design.
  • 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 1.5Ω 650V MOSFET built-in contributes to low power consumption and easy design.


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
BM2P151X-EVK-001 90 to 264Vac 47 to 63Hz 15.0V(Typ.) 12.0W Iout=0.8A 0 to 0.8A *1 150mW Iout=0A 0.837 70mVpp *2 91mm 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
BM2P151X-EVK-001 Chip One Stop, Inc. 2
CoreStaff Co., Ltd. 2
Ameya Holding Limited 1
DigiKey 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
BM2P151X-EVK-001 BM2P151X-Z AC/DC Converters ICs - Recommended - - - -
BM2P151X-EVK-001 RFN5BM6S Fast Recovery Diodes - Recommended - - - -
BM2P151X-EVK-001 RRE02VSM6S Standard Rectifier Diodes - Recommended - - - - -