High output current split package A/C adapter

• US 8,867,250 B2
• Filed: 12/20/2008
• Issued: 10/21/2014
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: Inventronics (Hangzhou), Inc.
• Original Assignee: Inventronics (Hangzhou), Inc.
• Inventors: Hua, Guichao
• Primary Examiner(s): Berhane, Adolf
• Assistant Examiner(s): Quddus, Nusrat
• Application Number:
  US12/340,671
• Publication Number:
  US 20090161395A1
• Time in Patent Office: 2,131 Days
• Field of Search: 363/76, 363/77, 363/84, 363/89, 363/125, 363/146, 363/147, 323/266
• US Class Current: 363/146
• CPC Class Codes: H02M 1/007 Plural converter units in cascade push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826
• CPC Class Codes: H02M 3/156 with automatic control of output voltage or current, e.g. switching regulators
• CPC Class Codes: H02M 3/33507 with automatic control of the output voltage or current, e.g. flyback converters H02M3/33561, H02M3/33569 take precedence

Abstract

A power adapter, including an AC input terminal, an AC-DC power converter, a DC-DC power converter, and an output terminal, wherein the AC-DC power converter and the DC-DC power converter are separate components, and wherein the power AC input terminal, AC-DC power converter, DC-DC power converter and the output terminal are connected sequentially via a plurality of cords.

Claims

1. A power adapter with two modules with separate enclosures, the power adapter comprising:

an AC input terminal;

an AC-DC power converter module configured for packaging in a first enclosure which is in electrical communication with the AC input terminal;

a DC-DC power converter module configured for packaging in a second enclosure; and

an output terminal configured to provide high current and low voltage;

a first cord between the AC-DC power converter module and the DC-DC power converter module carrying a high voltage of approximately 400 volts;

a second cord electrically connecting the DC-DC power converter module to the output terminal;

wherein the second cord is of a constant minimum length to provide for a constant high efficiency and constant load regulation; and

wherein the first enclosure comprises a first surface to provide for heat dissipation and the second enclosure comprises a second surface to provide for heat dissipation wherein heat dissipation from either the first enclosure or the second enclosure is independent of the other enclosure.

2. The power adapter of claim 1, wherein the AC-DC power converter comprises a rectification circuit and an isolated DC-DC conversion circuit, and wherein the rectification circuit is at a fore end of the AC-DC power converter and is followed by the isolated DC-DC conversion circuit, and wherein the rectification circuit converts an AC voltage into a high DC voltage which will be converted by the isolated DC-DC conversion circuit into a desired DC voltage at the output terminal.

3. The power adapter of claim 1, wherein the AC-DC power converter comprises a rectification circuit and a power factor correction circuit, and wherein the rectification circuit is at a fore end of the AC-DC power converter and is followed by the power factor correction circuit, and wherein the rectification circuit converts an AC voltage into a high DC voltage, which is converted into the high DC voltage at the output terminal by the power factor correction circuit.

4. The power adapter of claim 1, wherein the DC-DC power converter comprises a DC-DC conversion circuit, and wherein the DC-DC conversion circuit is either an isolated DC-DC conversion circuit or a non-isolated DC-DC conversion circuit.

5. The power adapter of claim 1, wherein the AC-DC power converter and the DC-DC power converter are connected via at least one removable cord and/or at least one permanent cord.

6. The power adapter of claim 1, wherein the AC-DC power converter and the AC input terminal are packaged in a single component.

7. The power adapter of claim 1, wherein the AC-DC power converter and the AC input terminal are separate components and are connected via at least one cord.

8. The power adapter of claim 1, wherein the first cord is thinner, Longer, and/or more flexible when compared to the second cord, which is thicker and shorter.

9. The power adapter of claim 1, wherein additional surface area for heat dissipation is provided by having the AC-DC power converter individually packaged and the DC-DC power converter individually packaged.

10. The power adapter of claim 1, wherein the minimum length of the second cord is of no length wherein the output terminal and DC-DC power converter are a single component.