Planar transformer's have the following main features compared with the traditional transformer:

(1) high current density. The wires of planar transformer are actually some flat conductors, thus the current density is high.

(2) High efficiency. The efficiency can reach 98% to 99%.

(3) Low leakage inductance. About 0.2% of the primary inductance.

(4) Good heat conduction. Short thermal channel distance, low temperature rise.

(5) Low EMI radiation. Good core shielding reduces radiation to a very low level.

(6) Small size. The use of a small core reduces the size accordingly.

(7) Good parameter repeatability. Because the winding structure is fixed and easy to pre-process, the parameters are stable.

(8) Wide operating frequency range. The frequency can be from 50 kHz to 2 MHz.

(9) Wide operating temperature range. The operating temperature is from -40 ℃ to 130 ℃.

(10) Good insulation. Planar transformer by the conductive circuit and the insulating sheet overlap each other, thus ensuring that between the windings, primary - secondary and secondary - secondary insulation between up to 4 kV isolation.