REFACDC011 - Reference Design

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.