Power supply and a method performed by a power supply
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsQiang LIU, Lackis ELEFTHERIADIS, Yandong LI, Yanjie XIN
Life of this patent
Estimating the term…
Abstract
A power supply (2000), a method of operating a power supply, a computer program (1020) and a computer program product (1010) is provided. The power supply is adapted to convert an oscillating Alternating Current, AC, to a single-directional Direct Current, DC. The power supply comprises a rectifier bridge (2100); a capacitor (2700); at least a first, a second and a third Electronic Switching Device, BSD (2400, 2500, 2600); a resistor (2300); a controller (2800) connected to the first, second and third ESDs. The controller is adapted to control switching of the first, second and third ESDs to operate the power supply in one of four modes of operation.
Claims21
1-52. (canceled)
A power supply, the power supply adapted to convert an oscillating Alternating Current (AC) to a single-directional Direct Current (DC), the power supply comprising:
- (1) a rectifier bridge at an input, the rectifier bridge having a first DC terminal and a second DC terminal;
- (2) a capacitor at an output, the capacitor having a first DC terminal connected to the first terminal of the rectifier bridge and a second DC terminal connected to the second terminal of the rectifier bridge;
- (3) at least a first, a second and a third Electronic Switching Device (ESD), wherein:
- a drain of the first ESD is connected to the first DC terminals,
- a source of the first ESD is connected to the second DC terminals, and
- the second and third ESDs are connected between the first DC terminals such that a drain of the second ESD is connected to a drain of the third ESD, a source of the third ESD is connected to the drain of the first ESD, and a source of the second ESD is connected to the first DC terminal of the capacitor;
- (4) an inductor connected between the first DC terminal of the rectifier bridge and the drain of the first ESD;
- (5) a resistor connected between the second DC terminal of the rectifier bridge and the source of the first ESD;
- (6) a controller connected to the first, second and third ESDs, wherein
- the controller is adapted to control switching of the first, second and third ESDs to operate the power supply in at least four modes of operation comprising:
- i) a first mode of operation in which the first and the second ESDs are turned off, and the third ESD is turned on,
- ii) a second mode of operation in which the first ESD is turned off, the third ESD is turned on and the second ESD operates in a linear region,
- iii) a third mode of operation in which the first ESD is turned off, the second and third ESDs are turned on, and
- iv) a fourth mode of operation in which the second ESD is turned on, and the first ESD and third ESD are operated to turn on and turn off alternatively to maintain a predetermined level of a voltage across the capacitor, and
- the power supply is adapted to enter the four modes of operation sequentially.
A method performed by a power supply, the power supply adapted to convert an oscillating Alternating Current (AC) to a single-directional Direct Current (DC), the power supply comprising:
- (1) a rectifier bridge at an input, the rectifier bridge having a first DC terminal and a second DC terminal;
- (2) a capacitor at an output, the capacitor having a first DC terminal connected to the first terminal of the rectifier bridge and a second DC terminal connected to the second terminal of the rectifier bridge;
- (3) at least a first, a second and a third Electronic Switching Device (ESD), wherein:
- a drain of the first ESD is connected to the first DC terminals,
- a source of the first ESD is connected to the second DC terminals, and
- the second and third ESDs are connected between the first DC terminals such that a drain of the second ESD is connected to a drain of the third ESD, a source of the third ESD is connected to the drain of the first ESD, and a source of the second ESD is connected to the first DC terminal of the capacitor;
- (4) an inductor connected between the first DC terminal of the rectifier bridge and the drain of the first ESD;
- (5) a resistor connected between the second DC terminal of the rectifier bridge and the source of the first ESD;
- (6) a controller connected to the first, second and third ESDs, wherein the method comprises:
- the controller controlling switching of the first, second and third ESD to operate the power supply in at least one of four modes of operation comprising:
- i) a first mode of operation in which the first and the second ESDs are turned off, and the third ESD is turned on,
- ii) a second mode of operation in which the first ESD is turned off, the third ESD is turned on and the second ESD operates in a linear region,
- iii) a third mode of operation in which the first ESD is turned off, the second and third ESDs are turned on, and
- iv) a fourth mode of operation in which the second ESD is turned on, and the first ESD and third ESD are operated to turn on and turn off alternatively to maintain a predetermined level of a voltage across the capacitor, wherein
- the four modes of operation are entered sequentially.
Dependencies are inferred from the claim text.