TDK Expands High-Power AC-DC Portfolio with 4.5 kW Three-Phase Supply

As industrial systems continue to demand higher power density, improved efficiency, and flexible system architectures, power supply design is increasingly focused on scalability, digital control, and compatibility with high-voltage infrastructure. TDK has introduced the TDK-Lambda TPS4500 series to address these requirements, delivering a 4,500 W AC-DC power platform designed for demanding industrial environments.

The TPS4500 is built for direct operation from high-voltage three-phase inputs, supporting both Delta and Wye configurations across a 360 to 528 Vac range. By accepting high-voltage three-phase input directly, the power supply eliminates the need for external step-down transformers, reducing system cost and complexity while supporting improved phase load balancing in large installations.

The platform supports both single- and dual-output configurations and is designed for series or parallel operation. Outputs can be load-shared in any proportion up to rated limits, enabling system designers to scale voltage or power as required by the application. Nominal output configurations include 92 V at 49 A and 184 V at 24.5 A, with wide adjustment ranges available via digital control interfaces. The 92 V output can be programmed from 10 to 96.5 V, while the 184 V version supports adjustment from 20 to 193 V.

Digital system integration is a core design feature of the TPS4500. A PMBus™ interface provides real-time monitoring of output voltage, output current, internal temperature, fan speed, and system status signals. The same interface allows remote programming of operating parameters such as output voltage limits, overcurrent thresholds, and remote on/off control. In addition to PMBus™, the power supply includes isolated AC Fail, DC Good, and dropped-phase signals, along with remote sense capability and a 12 V, 0.3 A standby supply to support supervisory electronics.

From a thermal and efficiency standpoint, the TPS4500 achieves a typical efficiency of 93%. The unit is capable of cold start at –40 °C and supports continuous operation from –10 °C to +70 °C ambient. Output power is linearly derated from 100% to 80% between 50 °C and 60 °C, and from 80% down to 55% at 70 °C, allowing predictable thermal behavior in enclosed or high-density systems. The enclosure measures 107 × 85 × 335 mm (W × H × D), making the supply suitable for integration into 2U rack-mounted systems.

The series is designed to meet a wide range of regulatory and environmental requirements. Safety certifications include IEC/UL/CSA/EN 62368-1, with CE and UKCA markings for Low Voltage, EMC, and RoHS compliance. The power supplies meet EN55032-A conducted and radiated emissions limits at the system level, comply with IEC 61000-4 immunity standards, and meet SEMI F47-0706 requirements at 480 Vac nominal input. Electrical isolation ratings include 3 kVac input-to-output, 2 kVac input-to-ground, and 500 Vdc output-to-ground.

For mechanical robustness, the TPS4500 series is designed to MIL-STD-810H vibration and shock requirements, supporting deployment in environments subject to transportation loads, industrial vibration, and mechanical stress.

The TPS4500 targets high-power industrial applications such as test and measurement systems, semiconductor manufacturing equipment, additive manufacturing platforms, industrial printers, laser systems, and RF power amplifiers, where scalable power delivery, digital monitoring, and high-voltage compatibility are critical system requirements.

www.emea.lambda.tdk.com