Power supplies target high-performance industrial applications

New Products |
By Graham Prophet

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 very high level of interaction within Industry 4.0 will, Powerbox asserts, require efficient and reliable power supplies to guarantee all-time-on operation and no latency in communication.


The OBM33, OBM35, OBP37 and OBP38 utilise 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. The launch includes more than 28 models delivering a single output voltage of 12V, 15V, 18V, 24V, 30V, 36V and 48V within a power range of 80W to 400W.


The supplies meet and surpass EN55022B radiated and conducted Class B. The units are built to sustain industrial environments such as surges of ±1 kV differential, 2 kV common; magnetic field immunity of 1A/m, conducted immunity 3 Vrms ; fast transient/burst 1 kV ; ESD ±8 kV air and 4 kV contact. With an input voltage of 90 to 264 VAC and line frequency of 47 to 63Hz, the OBM33, OBM35, OBP37 and OBP38 will reassure end users their systems operate in all regions with the highest performance and no disruption, on regional line voltages and in unstable power grids.


The new series can withstand 3000 VAC (4000 VAC for the OBM33) input to output , 1500 VAC input to ground and 500 VAC output to ground. Designed to provide designers with safety margins at 264 VAC and 63 Hz, the maximum leakage current is below 275 µA, claimed as unique for an industrial power supply and four times lower than normal average. Products can be operated from -10°C to +70°C. Without extra cooling, up to 75% of the maximum power is available. Additional forced air cooling will allow 100% power up to 50°C, then a slight power derating will allow operation up to 70°C. The 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.




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