Power supply with AC and DC back-up power

• US 20050156568A1
• Filed: 12/30/2003
• Published: 07/21/2005
• Est. Priority Date: 12/30/2003
• Status: Abandoned Application

• Current Assignee: Wen Hsiang Yueh
• Original Assignee: Wen Hsiang Yueh
• Inventors: Yueh, Wen Hsiang
• Application Number:
  US10/747,363
• Publication Number:
  US 20050156568A1
• Time in Patent Office: Days
• US Class Current: 320/128
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 9/062 for AC powered loads

Abstract

A power supply with AC and DC back-up power has a rectifier, a rechargeable battery, a charger, a detecting circuit, a first DC/DC converter and a DC/AC converter. The rectifier is coupled to the power of the wall-socket for generating a first power. Moreover, the rechargeable battery is charged by the first power through the charger, and the detecting circuit detects a power-supplying condition of the wall-socket. The first DC/DC converter is used to convert a power of either the battery or the first power to a second power, and the DC/AC converter converts a power of the battery into AC power.

Claims

1. A power supply with AC/DC back-up power for a computer, comprising:

a rectifier connected to a wall-socket for generating a first power;

a rechargeable battery;

a charger connected to the rectifier and the rechargeable battery and charging the rechargeable battery with the first power;

a detecting circuit connected to the wallsocket and detecting a power-supplying condition of the wall-socket;

a first DC/DC converter connected to the rectifier, the detecting circuit and the rechargeable battery, and used to convert a power of one of the battery and the first power to a second power supplied to a motherboard; and

a DC/AC converter connected to the rechargeable battery and the detecting circuit, and converting a power of the battery into AC power.

2. The power supply of claim 1, wherein the rectifier further comprises:

an EMI filter for filtering out noise of power in the wall-socket;

a bridge rectifier coupled to the EMI filter for converting wall-socket power into a;

DC power; and

a constant voltage circuit coupled to the bridge rectifier for stabilizing the DC power to be the first power.

3. The power supply of claim 1, wherein the rechargeable battery is fit in a portable box, and the portable box is coupled to the charger with an electrical contact to form a portable rechargeable battery.

4. The power supply of claim 1, wherein the second power includes DC 5V, DC 12V and DC 3.3V.

5. The power supply, of claim 1, wherein the AC power supplies power to an AC display.

6. The power supply of claim 5, wherein the AC display is a cathode ray tube (CRT) display.

7. The power supply of claim 1, further comprising a second DC/DC converter connected to the rechargeable battery and the detecting circuit for converting the power of the rechargeable battery to a third power.

8. The power supply of claim 7, wherein the third power includes DC 12V, DC 16V, DC 18V and DC 24V.

9. The power supply of claim 8, wherein the third power supplies power to a DC display.

10. The power supply of claim 9, wherein the DC display is a liquid crystal display (LCD).

11. The power supply of claim 7, further comprising:

an AC input port coupled to the power of the wall-socket;

a DC output port coupled to the third power for connecting the DC peripheral device; and

an AC output port coupled to the AC power for connecting the AC peripheral device.