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US 5,689,409 AGranted
Switched-mode power supply
AssigneeDeutsche Thomson-Brandt GmbH
InventorsPeter Scharlach, Jean-Paul Louvel
Life of this patent
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Abstract
The secondary winding is connected, via the series circuit of a capacitor and a second diode, to the charging capacitor which delivers the operating voltage. The centre point of the series circuit is connected to earth via a third diode. This enables energy to be recovered, in that the energy stored in the capacitor is delivered back to the charging capacitor during the inhibiting phase of the switching transistor.
Claims2
Switched-mode power supply having a switching transistor in series with the primary winding of a transformer,
- the secondary winding of which is connected, via a diode, to a charging capacitor which delivers an operating voltage,
- a network for reducing voltage spikes being connected to a winding
- the secondary winding is connected to the charging capacitor via the series circuit of a capacitor and a second diode, and
- the centre point of the series circuit is connected to earth via a third diode and an inductance in series with said third diode.
1 more element
Dependencies are inferred from the claim text.