Power Supply Device

Patent metadata

Field	Value
Publication number	US-2016190952-A1
Application number	US-201414910812-A
Country	US
Kind code	A1
Filing date	Aug 7, 2014
Priority date	Aug 7, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

According to one embodiment of the present invention, when a power supply device including first and second amplification units which share an energy storage element is used, it is possible to reduce voltage stress on a semiconductor device and to consistently maintain voltages output to the first and second amplification units by independently adjusting the amplification rates of the first and second amplification units.

First claim

What is claimed is:

1 . A power supply device, comprising:
an input power supply unit configured to rectify alternating-current (AC) power; and an amplification unit configured to amplify an input voltage by n times (n is a real number greater than 1), wherein the amplification unit includes first and second amplification units and an inductor, the first amplification unit outputs a first output voltage corresponding to n1 times (n1 is a positive real number) the input voltage to a first output part depending on an operation of a first switching element, and the second amplification unit outputs a second output voltage corresponding to n2 times (n2 is a positive real number) the input voltage to a second output part depending on an operation of a second switching element.

2 . The power supply device of claim 1 , wherein the first amplification unit, the second amplification unit, and the inductor are serially connected, and the inductor is connected between the first amplification unit and the second amplification unit.

3 . The power supply device of claim 1 , wherein the first and second amplification units have the same configuration as each other.

4 . The power supply device of claim 1 , wherein the input power supply unit includes a rectifier, and the rectifier is a bridge rectifier.

5 . The power supply device of claim 1 , wherein the first amplification unit includes the first output part connected to the first switching element in parallel, and the second amplification unit includes the second output part connected to the second switching element in parallel.

6 . The power supply device of claim 5 , wherein the first output part includes a first diode and a first capacitor-resistor unit which are connected to each other in series, and the second output part includes a second diode and a second capacitor-resistor unit which are connected to each other in series.

7 . The power supply device of claim 6 , wherein a capacitor and a resistor included in each of the first and second capacitor-resistor units are connected to each other in parallel.

8 . The power supply device of claim 1 , wherein n, n1, and n2 satisfy Equation 1:
n=n 1+ n 2.   [Equation 1]

9 . The power supply device of claim 1 , wherein n1 and n2 have the same value as each other.

10 . The power supply device of claim 1 , wherein the first and second switching elements are simultaneously turned on and simultaneously turned off.

11 . The power supply device of claim 1 , wherein the first and second switching elements are simultaneously turned on, the first switching element is turned off at a first time point, and the second switching element is turned off at a second time point,
wherein the first time point arrives later than the second time point when n1 has a value greater than that of n2.

12 . A power supply device, comprising:
a rectifier configured to rectify AC power to a first voltage; and an amplification unit configured to receive and boost the first voltage from the rectifier and divide the boosted voltage to output the divided voltage as second and third voltages.

13 . The power supply device of claim 12 , wherein the amplification unit includes:
a first amplification unit configured to receive and amplify the first voltage to output the second voltage; a second amplification unit serially connected to the first amplification unit, and configured to receive and amplify the first voltage to output the third voltage; and an inductor serially connected to the first and second amplification units.

14 . The power supply device of claim 13 , wherein the inductor is connected between the first and second amplification units.

15 . The power supply device of claim 13 , wherein the second and third voltages are the same voltage as each other.

16 . The power supply device of claim 12 , wherein each of the first and second amplification units includes first and second switching elements, and the second and third voltages are controlled depending on operating frequencies of the first and second switching elements.

17 . The power supply device of claim 16 , wherein the first and second switching elements are simultaneously turned on and turned off.

18 . The power supply device of claim 16 , wherein the first and second switching elements are simultaneously turned on and turned off when the second and third voltages are the same as each other.

19 . The power supply device of claim 16 , wherein the first and second switching elements are simultaneously turned on and turned off during a first period in which the second and third voltages are the same as each other, and
the first switching element is turned off at a first time point and the second switching element is turned off at a second time point during a second period in which the second and third voltages are different from each other.

20 . The power supply device of claim 19 , wherein the first and second switching elements are simultaneously turned on during the second period.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Jae Sam
• Huh Dong Young

Classifications

• H02M3/158

  including plural semiconductor devices as final control devices for a single load · CPC title

• H02M1/4225 Primary

  using a non-isolated boost converter · CPC title

• H02M7/04 Primary

  by static converters · CPC title

• H02M7/06

  using discharge tubes without control electrode or semiconductor devices without control electrode · CPC title

• H02M3/155 Primary

  using semiconductor devices only · CPC title