Rohm Referencedesigns

REFACDC011

REFACDC011 - Reference Design

Non-Isolation Buck Converter PWM method Output 9 W 12 V

The BM2P121X-EVK-001 evaluation board outputs 12V voltage from the input of 90Vac to 264Vac. The output current supplies up to 0.75A. The BM2P121X which is PWM method DC/DC converter IC built-in 650V MOSFET is used.

  • The BM2P121X 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 65kHz 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.

BM2P121X-EVK-001

Design Resources

 

Specifications

 
Board Number Input voltage Input Frequency Output voltage Maximum output power Output current range Stand-by Power Efficiency Output ripple voltage Size Operating Temperature
BM2P121X-EVK-001 90 to 264Vac 47 to 63Hz 12V(Typ.) 9W Iout=0.75A 0 to 0.75A *1 140mW Iout=0A 0.821 61mVpp *2 91mm x 30mm -10 to 65deg.C
Remarks:
*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
BM2P121X-EVK-001 CoreStaff Co., Ltd. 2
DigiKey 2
Chip One Stop, Inc. 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
BM2P121X-EVK-001 BM2P121X-Z AC/DC Converters ICs - Recommended - - - -
BM2P121X-EVK-001 RFN5BM6S Fast Recovery Diodes - Recommended - - - -
BM2P121X-EVK-001 RRE02VSM6S Standard Rectifier Diodes - Recommended - - - - -