Planar Transformer平面变压器

In2In 2004 the Premo Group added a new range of products to its catalogue: PLC Products. They consist of inductors, transformers, control instruments and other devices especially meant for data transmission through the public electricity network. This is a very promising business as telecom costs may come down considerably, as well as transmission speed increases massively if one can avoid traditional telecom networks. PLC products developement and manufacturing will be located in the Málaga plant. Product:Planar Transformer----Universal input 50W 12V★Introduction Switching mode power supplies started on the 60´s and they were developed mainly for aerospace and militar applications due to the big difference in terms of weight and volume with regards to the linear ones. Actually there are many proposal to improve the performance, efficiency and the size of these power supplies, which are used either in industrial and telecom applications. In this application note we intend to show the design of a switching mode power supply low output power with topology Forward Dual, small size and very high efficiency. The working frequency is high and the usage of planar transformer technology.★Characteristics and main advantages of this power supply are as follows:• Low output power (50W).

• Low bill of materials price.

• High efficiency (80-95%).

• Built with a current switch.

• Protection against overload.

• Very good efficiency with low loads.

• Switching frequency 300KHz approx.

• Easy and robust design.

• Small size and light weight. Product:Planar Transformer-------Universal input 30W 12V ★Introduction Switched mode power supplies design consists on an iterative process. A lot of possibilities and optimisations are possible. Several solutions have been suggested in order to improve performance and efficiency of these power supplies. In this application note, it is shown how efficiency of any flyback low-power power supply can be achieved, with small sizes, by means of operating at high frequency. Planar transformers are offering us this possibility. ★Main features and advantages of this power supply are:•Low power (30W)

•Low components cost

•High efficiency (typically 80% - 90%)

•Built-up with current limiter, overload protection

•High efficiency with light loads

•Working frequency 300KHz, approximately

•Robust and easy engineering

•Low weight and size-effective design If you have need, pls feel free to contact with me.