Overview
Telecommunications networks and data centers consume several percent of global electricity, and every fraction of a percent of efficiency improvement saves enormous amounts of energy and cost. Power chains for base stations, servers and network switches share a common architecture: an AC-DC PFC front end, an isolated DC-DC converter, and low-voltage distribution to the loads. BeiLuo's telecommunications solution builds each stage with Infineon CoolMOS and OptiMOS MOSFETs under digital control, delivering industry-leading efficiency in a compact footprint.
PFC Front End
The power chain begins with active power factor correction. Two IPP60R099P6 CoolMOS devices form an interleaved boost stage that draws clean sinusoidal current from the mains while boosting the voltage to a regulated 400 V bus. The 99 mΩ on-resistance minimizes conduction loss, and the low gate charge keeps switching loss low at the 100-200 kHz interleaved switching frequency. Digital control on the XMC4800 shapes the input current to meet IEC harmonics standards while responding quickly to load steps.
LLC Conversion
Following the PFC stage, a half-bridge LLC converter provides the isolated 48 V bus. Soft-switching operation across the load range eliminates most switching losses, so the converter maintains high efficiency from 10 percent to 100 percent load. The primary switches use the same IPP60R099P6 device family, simplifying the BOM and the thermal design across the power chain.
48 V Distribution and Synchronous Rectification
Modern server and telecom boards distribute 48 V and convert it at the point of load. Synchronous rectification with IPP075N15N3G MOSFETs replaces diodes, cutting the rectification loss by an order of magnitude. The 7.5 mΩ on-resistance and fast body diode make the device ideal for the 500 kHz switching frequencies used in compact on-board converters, and the 150 V rating leaves ample margin for transients on the 48 V rail.
Digital Control and Monitoring
Digital power brings intelligence to the supply chain. The XMC4800 executes the control loops in firmware, so efficiency and transient behavior can be tuned without changing components. The same MCU reads the TLE4972 current sensor to monitor output current, reports telemetry over the management bus, and adjusts fan speed based on load, improving acoustic performance in office and data center environments.
Reliability and Redundancy
Telecom power must never fail: rectifiers are deployed in N+1 redundancy, and data center UPS systems guarantee continuous availability. The Infineon devices in this solution are rated for continuous operation at elevated temperatures, and the genuine, traceable supply from BeiLuo ensures that every unit meets its datasheet performance. For UPS applications, the IKW40N120H3 IGBT family provides the inverter stage that converts battery DC back to AC during outages.
Thermal and Space Efficiency
Rack space and airflow are precious in telecom and data center facilities. The high efficiency of the CoolMOS-based power chain reduces heat that must be removed, allowing smaller heatsinks and higher packing density. The compact TO-220 packages mount easily on aluminum heatsinks, and the digital control reduces the number of analog components, freeing board space for monitoring and protection circuitry. Component height profiles are kept low to fit the standard 1U and 2U chassis heights used across telecom and data center equipment.
Battery Backup and UPS
Network equipment must survive mains failures, and online UPS systems provide seamless battery backup. The rectifier charges the battery while the inverter supplies the load from the battery through an IGBT stage. IKW40N120H3 devices form this inverter stage, and the AURIX platform monitors mains quality, battery state and load condition, transferring between modes in milliseconds. The same control platform manages battery health and reports runtime predictions to the network operations center.
Monitoring and Management Bus
Data center operators expect complete visibility into the power chain. The XMC4800 publishes voltage, current, power and efficiency telemetry over PMBus, and the TLE4972 current sensor provides the measurement data with isolation-free simplicity. Alarms trigger at programmable thresholds, and the management interface coordinates with the server's power management firmware to optimize the energy efficiency of the entire facility.
Scaling the Power Chain
The same building blocks scale from a 1 kW network switch supply to a 100 kW data center rectifier bay. Small designs use single interleaved PFC stages and one LLC converter; large systems parallel converter modules and add the IKW40N120H3 IGBT stage for the UPS inverter. Because the control is digital, module current sharing is implemented in firmware, and the monitoring bus scales with the system. This platform approach lets power supply vendors cover the entire product range with one hardware architecture, one firmware base and one supply chain, reducing engineering cost and time to market across the portfolio.
Getting Started
Request samples of the PFC and rectification devices, and our FAE team will help you design the control loop, layout the power stage and validate EMI performance. Let us quote your complete power chain BOM with volume pricing and scheduled delivery for your production programs.