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High-frequency transformers as the most important part of switching power supply, high-frequency transformer winding turns of each winding ratio determines the number of output voltage. It is the frequency of more than the frequency of the power transformer, mainly for high-frequency switching power supply for high-frequency switching power supply transformers.

High-frequency transformer (audio toroidal transformer )is as the most important part of switching power supply. Switching power supply is generally used half-bridge power conversion circuit, the work of two switching transistor turns on to produce 100kHz high-frequency pulse, and then through the high-frequency transformer buck, the output of low-voltage alternating current, high-frequency transformer winding coil Of the turns ratio determines the output voltage of the number.

In the high-frequency transformer design from high frequency transformer manufacturers, the transformer leakage inductance and distributed capacitance must be minimized, because the switching power supply in the high-frequency transformer is a high-frequency pulse square wave signal transmission. During transient transients, leakage inductance and distributed capacitance can cause inrush current and spike voltage, as well as top oscillation, resulting in increased losses. Usually the transformer leakage inductance, the control of the primary inductance of 1% to 3%.

The leakage inductance of the primary coil is caused by the incomplete coupling of the magnetic flux between the primary and secondary windings, between the layers and the layers, and between the turns and the turns.

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