Totem-Pole Bridgeless PFC (Diode Rectification)
Description
It consists of an inductor for boosting, a switch with a totem pole connection for switching at higher frequencies, and a switching diode for lower frequencies. The switch acts as a boost converter when the input voltage is positive and negative half cycle respectively. The totem pole structure solves the recovery loss problem of rectifier diodes.
Overview
- Single stage PFC
- Low frequency leg with FRDs for reduced costs
- Efficiency higher than 98.5%
- Frequency from 48 to 150 kHz
Circuit
Key Products
| Product Category | Product family | Product Number | Feature |
|---|---|---|---|
| Transistor | 750V SiC MOSFET | SCT4XXXDx series NEW | The latest SiC MOSFET device. Enhanced low on-resistance enable best in class performance. It supports 750 V withstand voltage, ensuring a higher operating margin than conventional products, and can be used safely. |
| 650V SiC MOSFET | SCT3xxxAx series | Trench-gate SiC MOSFET with low on-resistance (50% reduction) compared to conventional products. | |
| Diodes | 650V Si FRD | RFS series | Lower Vf than RSV series, but ultra fast switching capability |
| RFL series | Improve fast switching capability than RFN series. | ||
| Diodes | 600 V Si FRD | RFN series / RFNL Series | The low Vf type FRD is suitable for rectification, and achieves low loss even at high current. |
| Gate Driver | BM60212FV-C | High side/low side driver with high withstand voltage (1200V). A mirror clamp function and under voltage lockout function (UVLO) are built in. | |
| BM61X4XRFV | 1ch configuration, 3,750Vrms isolated type Gate Driver, can be used for switching devices with current source pins. |
Simulation
A-011 : Totem-Pole Bridgeless PFC (Diode Rectification)