Controlling a power adaptor light-emitting diode (led) indicator
AssigneeDell Products L.P.
InventorsWei-Cheng Yu, Tsung-Cheng Liao, Merle Jackson Wood, III, Wen-Yung Chang
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Abstract
Systems and methods for controlling a power adaptor Light-Emitting Diode (LED) indicator are described. In some embodiments, a method may include: detecting a coupling of a power adaptor to a voltage source; setting a plurality of transistors in a first configuration, where the first configuration provides power an LED coupled to the power adaptor via a cable; detecting a de-coupling of the power adaptor from the voltage source; and setting the plurality of transistors in a second configuration, where the second configuration ceases to provide power to the LED.
Claims34
A method, comprising:
- providing power to a Light Emitting Diode (LED) configured to indicate a status of a cable via a first transistor, wherein the first transistor is coupled to a Configuration Channel input wire and to the LED while a terminal of the cable is decoupled from any Information Handling System (IHS);
- in response to a coupling of the terminal to an IHS:
- (a) cutting off power to the LED via the first transistor, and (b) providing power to the LED via a second transistor, wherein the second transistor is coupled to a Voltage Supply input wire and to the LED while the terminal is coupled to the IHS;
- and
- in response to a de-coupling of the terminal from the IHS:
- (a) cutting off power to the LED via the second transistor, and (b) providing power to the LED via the first transistor.
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A power adaptor, comprising:
- a cable having a Light Emitting Diode (LED) mounted thereon;
- and
- a power adaptor coupled to the cable and having an electronic circuit configured to:
- provide power to the LED via a first transistor, wherein the first transistor is coupled to a Configuration Channel input wire and to the LED while a terminal of the cable is decoupled from any device;
- in response to a coupling of the terminal to a device:
- (a) cut off power to the LED via the first transistor, and (b) provide power to the LED via a second transistor, wherein the second transistor is coupled to a Voltage Supply input wire and to the LED while the terminal is coupled to the device;
- and
- in response to a de-coupling of the terminal from the device:
- (a) cut off power to the LED via the second transistor, and (b) provide power to the LED via the first transistor.
An electronic circuit, comprising:
- an input section having a Voltage Supply input wire and a Configuration Channel input wire;
- an output section having Voltage Supply output wire and a Configuration Channel output wire;
- and
- a logic circuit coupled between the input section and the output section, the logic circuit configured to:
- provide power to a Light Emitting Diode (LED) via a first transistor, wherein the first transistor is coupled to the Configuration Channel input wire and to the LED while a terminal of the cable is decoupled from any device;
- in response to a coupling of the terminal to an Information Handling System (IHS):
- (a) cut off power to the LED via the first transistor, and (b) provide power to the LED via a second transistor, wherein the second transistor (k1) is coupled to the Voltage Supply input wire and to the LED while the terminal is coupled to the IHS;
- and
- in response to a de-coupling of the terminal from the IHS:
- (a) cut off power to the LED via the second transistor, and (b) provide power to the LED via the first transistor.
Dependencies are inferred from the claim text.