Multimode USB-C power transmission and conversion supporting improved battery utilization
Systems and methods are provided for powering an Information Handling System (IHS) that receives a high-power transmission from a multimode AC adapter supporting USB-PD transmission and also supporting the high-power transmissions of a voltage greater than the supported USB-PD voltages. A power circuit converts the high-power transmission to a charging voltage used to charge a battery system of the IHS. After the multimode AC adapter is unplugged from the IHS, power is drawing power from the battery system of the IHS. When the battery system drops below a low-voltage threshold, the power drawn from the battery system is routed to the same power circuit. While operating this low-voltage threshold, power is drawn from the battery system via the power circuit. When the battery system drops below a second low-voltage threshold, an off power state of the IHS is initiated.
1. A method for powering an Information Handling System (IHS), the method comprising:
negotiating a high-power transmission from a multimode AC adapter coupled to a USB-C port of the IHS, wherein the multimode AC adapter supports USB-PD transmission and also supports the high-power transmissions of a voltage greater than voltages of the supported USB-PD transmissions, wherein the high-power transmissions comprise a nominal voltage greater than 50 volts and a peak voltage not exceeding 60 volts;
charging a battery system of the IHS using an output of a power circuit that converts the high-power transmission to a charging voltage, wherein the power circuit converts the high-power transmission to an output of between 18 and 20 volts that is used to charge the battery system of the IHS;
drawing power from the battery system of the IHS;
when the battery system drops below a low-voltage threshold, routing the power drawn from the battery system to the power circuit;
drawing power from the battery system of the IHS via the power circuit, wherein voltage multiplication capabilities of the power circuit are used to draw power from the battery system without increasing the current used to draw the power from the battery system; and
when the battery system drops below a second low-voltage threshold, initiating an off power state of the IHS.
2. The method of claim 1 , wherein routing the power drawn from the battery system to the power circuit increases the voltage of the power drawn from the battery system while operating below the low-voltage threshold.
3. The method of claim 2 , wherein routing the power drawn from the battery system to the power circuit decreases the current of the power drawn from the battery system while operating below the low-voltage threshold.
4. The method of claim 1 , wherein the power circuit comprises a plurality of digital voltage dividers, wherein one or more of the digital voltage dividers may be selected for use in converting the negotiated high-power charging transmission to the charging voltage.
5. The method of claim 4 , wherein the power circuit comprises inductive and capacitive voltage multiplication capabilities operable for converting power drawn from the battery system.
6. The method of claim 1 , wherein the second low-voltage threshold corresponds to a protection mode of the battery system.
7. The method of claim 1 , wherein routing the power drawn from the battery system to the power circuit reduces heat generated while operating below the low-voltage threshold.
8. A system for powering an Information Handling System (IHS), the system comprising:
a multimode AC (Alternating Current) adapter configured to supply power transmissions comprising USB-PD (Universal Serial Bus Power Delivery) transmissions and further comprising high-power transmissions of a voltage greater than voltages of the of USB-PD transmissions, wherein the high-power transmissions comprise a nominal voltage greater than 50 volts and a peak voltage not exceeding 60 volts; and
the IHS configured to:
negotiate the high-power transmission from a multimode AC adapter coupled to a USB-C port of the IHS;
charge a battery system of the IHS using an output of a power circuit that converts the high-power transmission to a charging voltage, wherein the power circuit converts the high-power transmission to an output of between 18 and 20 volts that is used to charge the battery system of the IHS;
draw power from the battery system of the IHS;
when the battery system drops below a low-voltage threshold, route the power drawn from the battery system to the power circuit;
draw power from the battery system of the IHS via the power circuit, wherein voltage multiplication capabilities of the power circuit are used to draw power from the battery system without increasing the current use to draw the power from the battery system; and
when the battery system drops below a second low-voltage threshold, initiate an off power state of the IHS.
9. The system of claim 8 , wherein routing the power drawn from the battery system to the power circuit increases the voltage of the power drawn from the battery system while operating below the low-voltage threshold.
10. The system of claim 9 , wherein routing the power drawn from the battery system to the power circuit decreases the current of the power drawn from the battery system while operating below the low-voltage threshold.
11. The system of claim 8 , wherein the second low-voltage threshold corresponds to a protection mode of the battery system.
12. The system of claim 8 , wherein the power circuit comprises a plurality of digital voltage dividers, wherein one or more of the digital voltage dividers may be selected for use in converting the negotiated high-power charging transmission to the charging voltage, and wherein the power circuit further comprises inductive and capacitive voltage multiplication capabilities operable for converting power drawn from the battery system.
13. The system of claim 8 , wherein routing the power drawn from the battery system to the power circuit reduces heat generated while operating below the low-voltage threshold.
14. An Information Handling System (IHS) provided power transmissions using a multimode AC adapter, the IHS comprising:
one or more processors;
a memory device coupled to the one or more processors, the memory device storing computer-readable instructions that, upon execution by the one or more processors, cause execution of an operating system of the IHS;
a battery system; and
an embedded controller comprising a memory having program instructions stored thereon that, upon execution by a logic unit of the embedded controller, cause the embedded controller to:
receive a high-power transmission from a multimode AC adapter coupled to a USB-C port of the IHS, wherein the multimode AC adapter supports USB-PD transmission and also supports the high-power transmissions of a voltage greater than voltages of the supported USB-PD transmissions, wherein the high-power transmissions comprise a nominal voltage greater than 50 volts and a peak voltage not exceeding 60 volts;
charge a battery system of the IHS using an output of a power circuit that converts the high-power transmission to a charging voltage, wherein the power circuit converts the high-power transmission to an output of between 18 and 20 volts that is used to charge the battery system of the IHS;
draw power from the battery system of the IHS;
when the battery system drops below a low-voltage threshold, route the power drawn from the battery system to the power circuit;
draw power from the battery system of the IHS via the power circuit, wherein voltage multiplication capabilities of the power circuit are used to draw power from the battery system without increasing the current used to draw the power from the battery system; and
when the battery system drops below a second low-voltage threshold, initiate an off power state of the IHS.
15. The IHS of claim 14 , wherein routing the power drawn from the battery system to the power circuit increases the voltage of the power drawn from the battery system while operating below the low-voltage threshold.
16. The IHS of claim 15 , wherein routing the power drawn from the battery system to the power circuit decreases the current of the power drawn from the battery system while operating below the low-voltage threshold.
17. The IHS of claim 14 , wherein the second low-voltage threshold corresponds to a protection mode of the battery system.