Device having a dc/dc voltage converter for switched-mode...

H - Electricity – 02 – M

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Details

H02M 3/337 (2006.01) H02M 1/00 (2006.01)

Patent

CA 2147152

DC/DC voltage converters (GW) are frequently operated in the current limiter mode in a starting phase; that is to say the pulse frequency for the switching elements (S1, S2) is varied such that the power con- sumption current remains constant. The pulse frequency is then usually higher than during normal operation. In the case of such a DC/DC voltage converter, if it is intended to switch over to a preferably constant operating frequency, the switching over is carried out, according to the invention, within a specified phase tolerance region (PB), with phase synchronicity (PV), using a clock transmitter (FG). In particular, the invention has the advantage that an input regulator (VR), which likewise operates in the switched mode, can easily be synchronized to the DC/DC voltage converter (GW).

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