Power supply switch apparatus

Patent metadata

Field	Value
Publication number	US-2016172135-A1
Application number	US-201514683689-A
Country	US
Kind code	A1
Filing date	Apr 10, 2015
Priority date	Dec 12, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A power supply switch apparatus includes a first interface, a switch circuit, and a power supply circuit. The first interface includes a first control signal output terminal, a second control signal output terminal, and a third control signal output terminal. Each of the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal outputs a control signal according to an electronic device inserted in the first interface. The switch circuit receives the control signals and outputs a power supply signal accordingly. The power supply circuit receives the power supply signal, and provides a first direct current (DC) voltage or a second DC voltage to the electronic device according to the power supply signal.

First claim

What is claimed is:

1 . A power supply switch apparatus comprising:
a first interface comprising a first control signal output terminal, a second control signal output terminal, and a third control signal output terminal each configured to output a control signal according to an electronic device inserted in the first interface; a switch circuit configured to receive the control signals and output a power supply signal accordingly; and a power supply circuit configured to receive the power supply signal, and provide a first direct current (DC) voltage or a second DC voltage to the electronic device according to the power supply signal.

2 . The power supply switch apparatus of claim 1 , wherein the switch circuit comprises a first switch, a second switch, and a third switch; each of the first switch, the second switch, and the third switch comprises a first terminal, a second terminal, and a third terminal; the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal are electrically coupled to the first terminals of the first switch, the second switch, and the third switch respectively; and the second terminals of the first switch, the second switch, and the third switch are grounded.

3 . The power supply switch apparatus of claim 2 , wherein the first switch, the second switch, and the third switch are npn type transistors; and the first terminal, the second terminal, and the third terminal of each of the first switch, the second switch, and the third switch are base, emitter, and collector respectively.

4 . The power supply switch apparatus of claim 2 , wherein the first interface further comprises a power terminal; the power supply circuit comprises a fourth switch and a fifth switch; each of the fourth switch and the fifth switch comprises a first terminal, a second terminal, and a third terminal; the first terminals of the fourth switch and the fifth switch are electrically coupled to the third terminals of the first switch, the second switch, and the third switch; the second terminals of the fourth switch and the fifth switch receive the second DC voltage and the first DC voltage respectively; and the third terminals of the fourth switch and the fifth switch are electrically coupled to the power terminal of the first interface.

5 . The power supply switch apparatus of claim 4 , wherein the fourth switch is an n channel MOSFET; the fifth switch is an p channel MOSFET; and the first terminal, the second terminal, and the third terminal of each of the fourth switch and the fifth switch are gate, source, and drain respectively.

6 . The power supply switch apparatus of claim 4 , wherein when a first device is connected to the first interface, the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal all output low voltage level control signals, the first switch, the second switch, and the third switch all turn off, the fourth switch turns on, the fifth switch turns off, and the third terminals of the fourth switch and the fifth switch output the second DC voltage which is provided to the power terminal of the first interface.

7 . The power supply switch apparatus of claim 6 , wherein when a second device is connected to the first interface, at least one of the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal outputs a high voltage level control signals, at least one of the first switch, the second switch, and the third switch turns on, the fourth switch turns off, the fifth switch turns on, and the third terminals of the fourth switch and the fifth switch output the first DC voltage which is provided to the power terminal of the first interface.

8 . The power supply switch apparatus of claim 7 , wherein the first interface is a Socket2 interface, the first device is a solid state disk (SSD) device; and the second device is a wireless wide area network (WWAN) device.

9 . The power supply switch apparatus of claim 1 , wherein the first DC voltage is a +3.3 volts auxiliary voltage; and the second DC voltage is a +3.3 volts system voltage.

10 . A power supply switch apparatus comprising:
a first interface comprising a first control signal output terminal, a second control signal output terminal, and a third control signal output terminal each configured to output a control signal according to an electronic device inserted in the first interface; a switch circuit configured to receive the control signals and output a power supply signal accordingly; and a power supply circuit comprising a fourth switch and a fifth switch and configured to receive the power supply signal, and provide a first direct current (DC) voltage or a second DC voltage to the electronic device according to the power supply signal, wherein when a first device is connected to the first interface, the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal all output low voltage level control signals, the first switch, the second switch, and the third switch all turn off, the fourth switch turns on, the fifth switch turns off, and the fourth switch and the fifth switch output the second DC voltage which is provided to the power terminal of the first interface; and wherein when a second device is connected to the first interface, at least one of the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal outputs a high voltage level control signals, at least one of the first switch, the second switch, and the third switch turns on, the fourth switch turns off, the fifth switch turns on, and the fourth switch and the fifth switch output the first DC voltage which is provided to the power terminal of the first interface.

11 . The power supply switch apparatus of claim 10 , wherein the switch circuit comprises a first switch, a second switch, and a third switch; each of the first switch, the second switch, and the third switch comprises a first terminal, a second terminal, and a third terminal; the first control signal output terminal, the second control signal output terminal, and the third control signal output terminal are electrically coupled to the first terminals of the first switch, the second switch, and the third switch respectively; and the second terminals of the first switch, the second switch, and the third switch are grounded.

12 . The power supply switch apparatus of claim 11 , wherein the first switch, the second switch, and the third switch are npn type transistors; and the first terminal, the second terminal, and the third terminal of each of the first switch, the second switch, and the third switch are base, emitter, and collector respectively.

13 . The power supply switch apparatus of claim 11 , wherein the first interface further comprises a power terminal; each of the fourth switch and the fifth switch comprises a first terminal, a second terminal, and a third terminal; the first terminals of the fourth switch and the fifth switch are electrically coupled to the third terminals of the first switch, the second switch, and the third switch; the second terminals of the fourth switch and the fifth switch receive the second DC voltage and the first DC voltage respectively; and the third terminals of the fourth switch and the fifth switch are electrically coupled to the power terminal of the first interface.

14 . The power supply switch apparatus of claim 13 , wherein the fourth switch is an n c

Assignees

• Hongfujin Prec Ind Wuhan
• Hon Hai Prec Ind Co Ltd

Inventors

• Li Dao-Wei
• Chen Chun-Sheng

Classifications

• G06F1/263 Primary

  Arrangements for using multiple switchable power supplies, e.g. battery and AC (G06F1/30 takes precedence) · CPC title

• G11C5/141

  Battery and back-up supplies · CPC title

• G06F1/26 Primary

  Power supply means, e.g. regulation thereof (for memories G11C) · CPC title

• H01H47/00 Primary

  Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current · CPC title