Method for Managing an Alternating Current Adaptor System

• US 20110225441A1
• Filed: 03/12/2010
• Published: 09/15/2011
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Chueh, Yung Fa, Yin, Chih-Chieh, Lin, Hsien Tsung, Liu, Chin-Jui
• Granted Patent: US 8,543,859 B2
• Time in Patent Office: Days
• US Class Current: 713/340
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 1/28 Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
• CPC Class Codes: G06F 1/32 Means for saving power

Abstract

A method for managing an alternating current adaptor system is disclosed. A direct current voltage is received at a high impedance power delivery network from a primary side of an alternating current adaptor system. An isolated voltage is output from the high impedance power delivery network to components of a secondary side of the alternating current adaptor system. A transition in a power state identification of an information handling system associated with the alternating current adaptor system is detected. An output voltage level of the alternating current adaptor system is alternated in response to the transition in the power state identification of the information handling system.

Claims

1. An alternating current adaptor system comprising:

a high impedance power delivery network configured to provide an isolated power signal, wherein the isolated power signal is isolated from a primary side of the alternating current adaptor system;

a host detection circuit in communication with the high impedance power delivery network, the host detection circuit configured to detect when an information handling system is connected to the alternating current adaptor system and when a change in a power state of the information handling system occurs;

an edge pulse generator in communication with the host detection circuit, the edge pulse generator configured to receive a signal from the host detection circuit to indicate that the information handling system is connected to the alternating current adaptor system or that the change in the power state of the information handling system has occurred, and further configured to output a low level pulse in response to the signal from the host detection circuit;

a pulse coupling circuit in communication with the edge pulse generator, the pulse coupling circuit configured to receive the low level pulse from the edge pulse generator, and to output an isolated low level pulse, wherein the isolated low level pulse is isolated from the edge pulse generator; and

a state toggling circuit in communication with the pulse coupling circuit, the state toggling circuit configured to toggle an enable line of a pulse width modulation circuit between high and low in response to receiving the isolated low level pulse from the pulse coupling circuit.

2. The alternating current adaptor system of claim 1 further comprising:

an alternating current to direct current converter in communication with the state toggling circuit, the alternating current to direct current converter configured to provide a direct current output voltage to information handling system in response to the power state of the information handling system.

3. The alternating current adaptor system of claim 1 wherein the change in the power state of the information handling indicates that the alternating current adaptor system is plugged into the information handling system.

4. The alternating current adaptor system of claim 1 wherein the change in the power state of the information handling indicates that the alternating current adaptor system is unplugged from the information handling system.

5. The alternating current adaptor system of claim 1 wherein the change in the power state of the information handling indicates that the alternating current adaptor system is plugged into the information handling system and that the alternating current adaptor system is isolated from the information handling system.

6. A method comprising:

receiving, at a high impedance power delivery network, a direct current voltage from a primary side of an alternating current adaptor system;

outputting an isolated voltage from the high impedance power delivery network to components of a secondary side of the alternating current adaptor system;

detecting a transition in a power state identification of an information handling system associated with the alternating current adaptor system; and

alternating an output voltage level of the alternating current adaptor system in response to the transition in the power state identification of the information handling system.

7. The method of claim 6 further comprising:

generating a low voltage level pulse in response to detecting the transition in the power state identification of the information handling system;

toggling an input voltage of a pulse width modulation circuit in response to the low voltage level pulse;

if the input voltage of the pulse width modulation circuit is toggled to a high voltage level, enabling the pulse width modulation circuit; and

if the input voltage of the pulse width modulation circuit is toggled to a low voltage level, disabling the pulse width modulation circuit.

8. The method of claim 6 wherein components of the secondary side include a host detection circuit, an edge pulse generator, a device connection, and any combination thereof.

9. The method of claim 6 wherein the power state identification indicates that the alternating current adaptor system is plugged into the information handling system.

10. The method of claim 6 wherein the power state identification indicates that the alternating current adaptor system is unplugged from the information handling system.

11. The method of claim 6 wherein the power state identification indicates that the alternating current adaptor system is plugged into the information handling system and that the alternating current adaptor system is isolated from the information handling system.

12. The method of claim 6 wherein the voltage level of the alternating current adaptor system transitions from a high voltage level to a low voltage when the power state identification indicates that the alternating current adaptor is not connected to the information handling system or that the alternating current adaptor is isolated from the information handling system.

13. The method of claim 6 wherein the voltage level of the alternating current adaptor system transitions from a low voltage level to a high voltage when the power state identification indicates that the alternating current adaptor is actively connected to the information handling system.

14. A method comprising:

detecting a first change in a power state identification of an information handling system;

generating a pulse in response to detecting the first change in the power state identification of the information handling system;

toggling an output of a toggling state circuit in response to the pulse;

disabling a pulse width modulation circuit when the output of the toggling state circuit is toggled; and

turning off an output voltage provided to the information handling system when the pulse width modulation circuit is disabled.

15. The method of claim 14 further comprising:

detecting a second change in the power state identification of the information handling system;

generating the pulse in response to detecting the second change in the power state identification of the information handling system;

toggling the output of the toggling state circuit in response to the pulse;

enabling the pulse width modulation circuit when the output of the toggling state circuit is toggled; and

turning on the output voltage provided to the information handling system when the pulse width modulation circuit is enabled.

16. The method of claim 14 wherein the first change in the power state identification indicates that an alternating current adaptor system is plugged into the information handling system.

17. The method of claim 14 wherein the first change in the power state identification indicates that an alternating current adaptor system is unplugged from the information handling system.

18. The method of claim 14 wherein the first change in the power state identification indicates that an alternating current adaptor system is plugged into the information handling system and that the alternating current adaptor system is isolated from the information handling system.

19. The method of claim 14 wherein the output of the toggling state circuit is toggled when a rising edge of the pulse is detected.

20. The method of claim 14 wherein the output of the toggling state circuit is toggled when a falling edge of the pulse is detected.