Compact power supplies use GaN power stage and planar magnetics

Compact power supplies for industrial applications, the TE series, use advanced technologies such as wide bandgap GaN semiconductors, high frequency planar transformers and enhanced flyback topology, said Cosel.
Two versions, the TEPS has pins for PCB mounting and the TECS has crimp style JST connectors. In both cases the 45W and 65W are footprint interchangeable.
There is a 45W model (TECS / TEPS45F) and a 65W version (TECS / TEPS65F) fitting into 1.0 x 2.3 inch / 25.4 x 58.4mm (TEPS) or 1.0 x 3.0 inch 25.4 x 76.2mm (TECS) footprints. The 12V and 24V output versions are able to deliver 140 per cent power to sustain peak loads with efficiency up to 93.5 per cent.
Standard products are delivered as an open frame though an optional dust protection case will be available.
Cosel’s R&D team developed a highly integrated power stage using wide band gap (WBG) GaN semiconductors associated with a high frequency planar transformer. Taking the benefits of GaN performances in high frequency switching, explained Cosel, it has been possible to deliver 45 and 65W into these small footprints.
Cosel explained that it also took into consideration the requirement to minimise the size of the power supply, and adopted a vertical assembly technique that combined with a higher switching frequency of up to 800kHz saves about 58 per cent board space compared to conventional technology whilst keeping a high level of power-conversion efficiency, higher by three points compared to conventional products, said the company.
Designed for worldwide applications, the TE series has an input voltage range of 85V AC to 264V AC single phase, and conforms to safety standards input voltage range of 100 to 240V AC (50 / 60Hz).
The TECS / TEPS45F and TECS / TEPS65F are available in three fixed output voltages, 5.0, 12 and 24V with respective currents up to 45 and 65W. To accommodate the inrush current associated with DC motors, capacitor banks and similar applications, a 140 per cent peak current option (H) will be available in 2024 for the 12V and 24V versions.
The TECS / TEPS45-65F have an optimised switching topology for efficiency up to 93.5 per cent at 230V AC and rated load.
The units are designed to operate from -10 to +70 degrees C and they can be mounted in any orientation. Depending on the ambient temperature and environment, a derating may apply, advised the company. The units have a 3,000V AC input to output isolation voltage and a leakage current of 0.25mA max complying with the IEC62368 specification.
The power supplies are suitable for Class II equipment and are able to achieve a low noise performance without requiring any ground connection. At no load, power consumption is as low as 200mW.
The TECS/TEPS45-65F meet the safety agency approval UL62368-1 and c-UL (equivalent to CAN/CSA-C22.2 No.62368-1), EN62368-1. The products also comply with the Japanese Electrical Appliance and Material Safety Act DEN-AN
Suitable applications include measurement and analysis equipment, machine tools, industrial printers, display equipment, and ticketing machines. They comply with the RoHS and Low Voltage directives and carry the CE mark and UKCA.

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