Powerbox introduces four new single-output ac-dc power supplies designed to power Industry 4.0 applications. As part of Powerbox Industrial Line, the four series are based on the latest power switching technologies; LLC, synchronous rectification, active PFC, low leakage current and energy optimization. The new series includes over 28 models delivering outputs of 12V, 15V, 18V, 24V, 30V, 36V and 48V within a power range of 80W to 400W.
Accommodating various system integration requirements, the new series include different mechanical options, open frame, L and U bracket and fully enclosed with fan. The OBM33 (80-150W) is available in 2 x 4 inch footprint (1.3 inch low profile). The OBM35 (200W) fits into a 3 x 5 inch footprint (1.5 inch height) and available in U-bracket or fully enclosed. Addressing a very large segment, the OBP37 (300W) has a 3 x 6 inch footprint (1.5 inch height) and available in open-frame, L-bracket & fully enclosed with fan. The OBP38 (400W) has a 4 x 7 inch footprint (1.58 inch height) and packaged in U-bracket or fully enclosed with fan.
The OBM33, OBM35, OBP37 and OBP38 utilize an LLC half bridge topology, complemented by synchronous rectification and low standby power consumption. These technologies contribute to characteristics such as high efficiency (up to 93%) high energy density, high peak output current but also very low power consumption at no load, below 0.5W and below 1W when using the Power Fail Detect signal. These power supplies have an input range of 90- to 264-Vac, 47- to 63-Hz.
Combining efficient topology and optimized layout for EMI performance, the OBM33, OBM35, OBP37 and OBP38 meet and surpass EN55022B radiated and conducted Class B. The units are built to sustain industrial environments such as surges of ±1kV differential, 2kV common ; magnetic field immunity of 1A/m, conducted immunity 3Vrms ; fast transient/burst 1kV ; ESD ±8kV air and 4kV contact.
“Internet of Things†is everywhere and Industry 4.0 happening faster than expected. In that environment, business continuation and energy saving is a must, requiring power supplies designed to meet demanding and complex requirements†says Martin Fredmark, VP Product Management. “The new series include a number of technical innovations contributing to reduce power consumption and to offer a high degree of flexibility to systems architects.â€
The new series can withstand 3000Vac (4000Vac for the OBM33) input-to-output, 1500Vac input-to-ground and 500Vac output-to-ground. Designed to provide designers with safety margins at 264Vac and 63Hz, the maximum leakage current is below 275 µA, which is unusual for an industrial power supply and four-times lower than previous designs.
Products can be operated from -10 to +70 degrees C. Without extra cooling, up to 75% of the maximum power is available. Additional forced air cooling will allow 100% power up to 50 degrees C, with power derating up to 70 degrees C.
The new series include short circuit protection, over-voltage and over-temperature protection. Depending on the model, additional features such as power fail detect (PFD) signal, output voltage inhibit, DC OK and PS OFF are available. At full load and 25 degrees C ambient, based on the calculation method MIL-HDBK-217F, the OBM33, OBM35, OBP37 and OBP38 MTBF reach up to 300,000 hours. Products comply to RoHS requirement and designed to minimize environmental impact.
