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US 9,543,839 B2Granted
Voltage stabilizing circuit
AssigneesLite-On Electronics (Guangzhou) Limited, Lite-On Technology Corporation
InventorsXiaoyi Jin, Zhihong Ye, Dong Xiang
Life of this patent
Estimating the term…
Abstract
A voltage stabilizing circuit includes an input capacitor, a booster circuit having an input side coupled across the input capacitor, a first output capacitor coupled to an output side of the booster circuit, and a series connection of a first power switch and a second output capacitor coupled between two terminals of the first output capacitor. The first power switch has a terminal coupled to one terminal of the first output capacitor. The second output capacitor has a first terminal coupled to the other terminal of the first power switch at a common node, and a second terminal coupled to the other terminal of the first output capacitor. A second power switch is coupled between the input capacitor and the common node.
Claims15
A voltage stabilizing circuit comprising:
- an input capacitor having a first terminal and a second terminal;
- a booster circuit having an input side coupled across said input capacitor, and an output side;
- a first output capacitor having a first terminal and a grounded second terminal that are coupled to said output side of said booster circuit;
- a series connection of a first power switch and a second output capacitor coupled between said first and second terminals of said first output capacitor, said first power switch having a first terminal coupled to said first terminal of said first output capacitor and a second terminal, said second output capacitor having a first terminal coupled to said second terminal of said first power switch at a common node and a second terminal coupled to said second terminal of said first output capacitor;
- a second power switch coupled between said first terminal of said input capacitor and said common node;
- and
- a parallel connection of a third power switch and a current limiting resistor coupled between said second terminal of said second output capacitor and said second terminal of said first output capacitor;
- wherein said input capacitor is configured to filter and regulate a DC input voltage so as to generate a regulated voltage thereacross;
- wherein said booster circuit is configured to receive the regulated voltage at said input side, to boost the regulated voltage to a predetermined voltage, and to output the predetermined voltage at said output side;
- wherein said first and second power switches are controlled based at least on the regulated voltage and a predetermined reference voltage;
- and
- wherein each of said first, second and third power switches includes one of a metal-oxide-semiconductor field effect transistor, an insulated gate bipolar transistor and a bipolar junction transistor.
9 more elements
A voltage stabilizing circuit comprising:
- an input capacitor having a first terminal and a second terminal;
- a booster circuit having an input side coupled across said input capacitor, and an output side;
- a first output capacitor having a first terminal and a grounded second terminal that are coupled to said output side of said booster circuit;
- a series connection of a first power switch and a second output capacitor coupled between said first and second terminals of said first output capacitor, said first power switch having a first terminal coupled to said first terminal of said first output capacitor and a second terminal, said second output capacitor having a first terminal coupled to said second terminal of said first power switch at a common node and a second terminal coupled to said second terminal of said first output capacitor;
- a second power switch coupled between said first terminal of said input capacitor and said common node;
- and
- a parallel connection of a third power switch and a current limiting resistor coupled between said second terminal of said second output capacitor and said second terminal of said first output capacitor;
- wherein said input capacitor is configured to filter and regulate a DC input voltage so as to generate a regulated voltage thereacross;
- said booster circuit is configured to receive the regulated voltage at said input side, to boost the regulated voltage to a predetermined voltage, and to output the predetermined voltage at said output side;
- and said first and second power switches are controlled based at least on the regulated voltage and a predetermined reference voltage.
7 more elements
A voltage stabilizing circuit comprising:
- an input capacitor having a first terminal and a second terminal;
- a booster circuit having an input side coupled across said input capacitor, and an output side;
- a first output capacitor having a first terminal and a grounded second terminal that are coupled to said output side of said booster circuit;
- a series connection of a first power switch and a second output capacitor coupled between said first and second terminals of said first output capacitor, said first power switch having a first terminal coupled to said first terminal of said first output capacitor and a second terminal, said second output capacitor having a first terminal coupled to said second terminal of said first power switch at a common node and a second terminal coupled to said second terminal of said first output capacitor;
- a second power switch coupled between said first terminal of said input capacitor and said common node;
- and
- a parallel connection of a third power switch and a current limiting resistor coupled between said second terminal of said second output capacitor and said second terminal of said first output capacitor;
- wherein said first power switch when non-conducting electrically isolates said first terminal of said second output capacitor from said first terminal of said first output capacitor;
- wherein said input capacitor is configured to filter and regulate a DC input voltage so as to generate a regulated voltage thereacross;
- wherein said booster circuit is configured to receive the regulated voltage at said input side, to boost the regulated voltage to a predetermined voltage, and to output the predetermined voltage at said output side;
- and
- wherein said first and second power switches are controlled based at least on the regulated voltage and a predetermined reference voltage.
9 more elements
Dependencies are inferred from the claim text.