REFACDC003 - Reference Design

The BM2P129T1F-EVK-001 evaluation board outputs 12 V voltage from the input of 90 Vac to 264 Vac. The output current supplies up to 0.167 A. BM2P129TF which is PWM method DC/DC converter IC built-in 650 V MOSFET is used. The BM2P129TF contributes to low power consumption by built-in a 650 V 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 100 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 9.5Ω 650V MOSFET built-in contributes to low power consumption and easy design.