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US 2012/0068682 A1Published application
Dc to dc voltage converter comprising a charge pump capacitor
AssigneeValeo Systemes de Controle Moteur
InventorJean-Marie Laurent
Life of this patent
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Abstract
The invention relates to a DC to DC voltage converter including a charge pump capacitor (C) installed parallel to a means (10, 20) for controlling switches (T1, T2), arranged to maintain a predefined voltage range on the terminals of the means (10) for controlling the upper switch (T1). The control means (10, 20) are arranged so as to close the lower switch (T2) in order to impose zero electric potential on the central terminal of the star (O) when the upper switch (T1) is open, in order to force the charging of the charge pump capacitor (C).
Claims6
A DC to DC voltage converter, comprising:
- an input terminal;
- an output terminal;
- a control terminal;
- a ground, wherein the input terminal, the output terminal, the control terminal, and the ground form a four-branched star circuit with a central terminal, and wherein an input voltage is applied between the input terminal and the ground,
- an upper switch, installed in a branch of the star connecting the input terminal with the central terminal of the star, arranged to be controlled in opening and closing for chopping the input voltage;
- a lower switch, installed in a branch of the star connecting the central terminal of the star to the ground, arranged to be controlled in opening and closing;
- means for controlling the upper and lower switches;
- and
- a charge pump capacitor, installed in parallel with the control means, arranged to maintain a predefined voltage range on the terminals of the means for controlling the upper switch,
- wherein the control means are arranged so as to close the lower switch to impose a zero electric potential on the central terminal of the star when the upper switch is open, to force the charging of the charge pump capacitor.
7 more elements
Dependencies are inferred from the claim text.