Switching power supply with clamping circuit
AssigneeHong Fu Jin Precision Industry (Shen Zhen) Co., Ltd.
InventorsKuan-Hong Hsieh, Xiao-Guang He
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Abstract
A switching power supply with clamping circuit includes a clamping circuit between a slave output terminal and a master output terminal thereof, to prevent voltage drift at the slave output terminal. The clamping circuit includes a switching circuit connected between the slave output terminal and the master output terminal, and a voltage stabilizing circuit connected between the slave output terminal and the switching circuit. When the output voltage at the slave output terminal steps up to a certain level, the voltage stabilizing circuit functions and enables the switching circuit, and therefore prevents the output voltage from climbing higher than the load requires.
Claims10
A switching power supply, comprising:
- a pulse-width control circuit;
- a transformer having a plurality of secondary windings;
- one or more slave branch circuits, each being connected to one of the secondary windings and comprising a slave output terminal;
- one or more master branch circuits, each being connected to another one of the secondary windings and comprising a master output terminal;
- and
- one or more clamping circuits, each being positioned between a slave output terminal and a master output terminal, and comprising a voltage stabilizing circuit and a switching circuit, the switching circuit being connected between the slave output terminal and the master output terminal, the voltage stabilizing circuit being connected between the slave output terminal and the switching circuit, and being capable of enabling or disabling the switching circuit.
Dependencies are inferred from the claim text.