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REFACDC029 - Reference Design

24V 2A Output, BM1P061FJ Evaluation Board

Reference board. It used to PWM method DC/DC Converter Controller IC BM1P061FJ. BM1P061FJ is including 650V High voltage starter, for low Stand-by Power. Output voltage control method is used current mode regulation, therefore it can used cycle by cycle current limit. It is achieved quick response of dynamic load changing situation. Switching frequency is fixed 65 kHz. Light load situation has frequency decrease function that recognize high efficiency. Switching frequency jitter function is included for low EMI. Various functions are included for safety, Soft start, Frequency Burst Mode, VCC OVP, Output OLP and Brown out.

  • PWM frequency : 65kHz, 100kHz
  • PWM current mode method
  • Frequency Hopping function
  • Burst operation / Frequency reduction function when load is light
  • Built-in 650V start circuitROHM BM1P061FJ-EVK-001 is from wide input voltage (90Vac~264Vac) to output 24V 2A max.
  • Constant Voltage


Design Resources



Board Number Input Voltage Range Input Frequency No Load Input Power Output Voltage Output Current Range Efficiency Output Ripple Voltage size Operating Temperature
BM1P061FJ-EVK-001 90 to 264Vac 47 to 63Hz 100mW Vin:AC100V/230V 24V(Typ.) 2A *1 80% Output:24V 2A 100mVpp 20MHz Bandwidth *2 110mmx59mm -10 to 65deg.C
*1 Please adjust operating time, within any parts surface temperature under 105 °C
*2 Not include spike noise

Distribution Inventory


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
BM1P061FJ-EVK-001 BM1P061FJ AC/DC Converters ICs - Recommended - - - -
BM1P061FJ-EVK-001 RFU02VSM8S Fast Recovery Diodes - Recommended - - - - -
BM1P061FJ-EVK-001 RB160VAM-40 Schottky Barrier Diodes - Recommended - - - - -
BM1P061FJ-EVK-001 RF05VAM2S Fast Recovery Diodes - Recommended - - - - -
BM1P061FJ-EVK-001 RF2001T3DNZ Fast Recovery Diodes - Active - -