Dc-dc converter

Details Dc-dc converter Dc-dc converter

H - Electricity

02

M

321/27

H02M 3/325 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2009817

ABSTRACT OF THE DISCLOSURE A DC-DC converter comprises a switching element having a rise time ton and a fall time toff; a control device for controlling the switching operation of the switching element; a transformer having a primary winding and a secondary winding, the primary winding being connected to a DC power source through the switching element, and having an open inductance, LM; an inductance coil having an inductance L connected to the secondary winding of the transformer; and a rectifying device for rectifying the output from the secondary winding of the transformer; assuming that the voltage applied to the primary winding of the transformer is E, the load current flowing through the transformer is ID, and the sum of the stray capacitance of the switching element and the distributed capacity of the windings of the transformer is Cl, the following relational expressions being established: L > (E/ID) ton and LM > 4 toff2/.pi.2 Cl

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