Overview
Switch-mode power supplies, uninterruptible power supplies and active power-factor-correction front ends convert and condition large amounts of electrical power, and the quality of the power stage determines both efficiency and reliability. CR Micro's portfolio fits this space well: Super Junction MOSFETs for the PFC and primary stages, SiC MOSFETs for high-frequency conversion, and SiC JBS diodes for rectification. BeiLuo supplies the whole set with genuine traceability and FAE support.
Active Power-Factor Correction
Modern supplies draw near-sinusoidal current to meet harmonic limits, using an active PFC front end that switches at high frequency and handles the full input power. A boost converter built around a CRJQF22N65G4BFQ Super Junction MOSFET and a CRXSP20D120G3 SiC JBS diode corrects the power factor with low loss. The Super Junction structure gives a 21 milliohm on-resistance at 96 A, and the four-lead package switches cleanly, while the SiC diode has no reverse-recovery charge, so the boost stage stays efficient and quiet at high frequency.
Harmonics and Control
The PFC control loop shapes the input current to follow the input voltage, so the current waveform must be controlled precisely and the power stage must switch predictably. A clean switching edge and a low-inductance layout reduce the high-frequency content that would otherwise require a larger input filter. Getting the current loop and the layout right is what separates a compliant front end from a noisy one.
High-Frequency Supplies
A switch-mode supply converts the mains to a regulated output at high frequency, and the primary switch and the secondary rectifier set its efficiency. A Super Junction MOSFET or a SiC MOSFET handles the primary switching depending on the power and frequency, while SiC JBS diodes handle the secondary rectification. Raising the switching frequency shrinks the transformer and filter magnetics, which raises power density in a supply that must fit a rack or an adapter.
UPS and Server Power
A UPS rectifier and inverter operate continuously, so efficiency and thermal behavior matter at every load, not only at peak. A SiC MOSFET such as the CRXQ75M120G4Z keeps conduction and switching loss low in the bridge, and a SiC diode keeps the output clean with low overshoot and EMI. In a server power supply, the same combination of high efficiency and high power density is what allows more compute in a fixed rack space.
Thermal and Layout Design
Keep the DC-link capacitor close to the switches, size the gate resistor to control the edges within the EMI budget, and measure overshoot at the device terminals. Choose the package for your cooling and board: the Super Junction family spans TO-247, TO-263, QDPAK and T2PAK, and the SiC family adds QDPAK, TOLL and TO-247-4. Verify junction temperature at the worst-case current and ambient, and use a thin, uniform interface material.
Documentation and Supply
Power-supply manufacturers and their customers demand complete traceability. Every CR Micro device BeiLuo ships includes an import declaration, a certificate of origin and a RoHS compliance file, so procurement and audit reviews are straightforward. Mainstream devices are held in regional stock, and our FAE team supports device selection, gate drive, layout and thermal sign-off from prototype to production.
Conclusion
Power supplies reward efficiency, low noise and dependable supply. CR Micro Super Junction MOSFETs, SiC MOSFETs and JBS diodes deliver the electrical performance these designs need, and BeiLuo adds the authorized stock, documentation and engineering support that keep projects on schedule.