CHARGING SYSTEM AND METHOD
In an embodiment of the techniques presented herein, a charging system includes an output port configured to operate as a Universal Serial Bus Power Delivery (USB-PD) port, a wireless charging unit having a magnetic charging interface that conforms to a wireless charging protocol, a voltage regulator circuit, a switch configurable to connect the voltage regulator circuit to the output port or the wireless charging unit, and a charging integrated circuit (IC) controller configured to control the switch to connect the voltage regulator circuit to the wireless charging unit and control the voltage regulator circuit to generate a magnetic charging signal at the magnetic charging interface based on a connection state of the magnetic charging interface, and connect the voltage regulator circuit to the output port and control the voltage regulator circuit to generate a charging signal at the output port based on a connection state of the output port.
1 . A charging system, comprising:
an output port configured to operate as a Universal Serial Bus Power Delivery (USB-PD) port;
a wireless charging unit comprising a magnetic charging interface that conforms to a wireless charging protocol;
a voltage regulator circuit;
a switch configurable to connect the voltage regulator circuit to the output port or the wireless charging unit; and
a charging integrated circuit (IC) controller configured to:
control the switch to connect the voltage regulator circuit to the wireless charging unit and control the voltage regulator circuit to generate a magnetic charging signal at the magnetic charging interface based on a connection state of the magnetic charging interface; and
control the switch to connect the voltage regulator circuit to the output port and control the voltage regulator circuit to generate a charging signal at the output port based on a connection state of the output port.
2 . The charging system of claim 1 , wherein:
the wireless charging unit comprises an inverter connected to the switch; and
the charging IC controller is configured to:
control the switch to connect the voltage regulator circuit to the inverter; and
control the inverter to generate the magnetic charging signal.
3 . The charging system of claim 1 , wherein:
the wireless charging unit comprises a visual indicator; and
the charging IC controller is configured to:
control the visual indicator in a first state responsive to the voltage regulator circuit being connected to the output port;
control the visual indicator in a second state responsive to the magnetic charging signal being generated in a full power mode; and
control the visual indicator in a third state responsive to the magnetic charging signal being generated in a reduced power mode.
4 . The charging system of claim 1 , wherein the charging IC controller is configured to:
establish a first contract with one of a first device connected to the output port or a second device connected to the magnetic charging interface; and
establish a second contract with the other of the first device or the second device based on power remaining after satisfying the first contract.
5 . The charging system of claim 1 , wherein:
the voltage regulator circuit is integrated into the charging IC controller.
6 . The charging system of claim 1 , wherein:
the wireless charging unit comprises a visual indicator; and
the charging IC controller is configured to:
control the visual indicator in a first state based on the connection state of the magnetic charging interface; and
control the visual indicator in a second state based on the connection state of the output port.
7 . The charging system of claim 1 , wherein:
the charging IC controller is configured to control the switch to connect the voltage regulator circuit to the wireless charging unit responsive to the connection state of the magnetic charging interface being a connected state and the connection state of the output port being a disconnected state.
8 . The charging system of claim 1 , wherein:
the charging IC controller is configured to control the switch to connect the voltage regulator circuit to a one of the output port or the wireless charging unit having a connection state transitioning from a disconnected state to a connected state.
9 . A method for operating a charging system comprising:
controlling, by an integrated circuit (IC) controller of the charging system, a switch to connect a voltage regulator circuit of the charging system to one of an output port of the charging system or a magnetic charging interface of a wireless charging unit of the charging system based on a connection state of the output port and a connection state of the magnetic charging interface, wherein the output port is a Universal Serial Bus Power Delivery (USB-PD) port and the magnetic charging interface conforms to a wireless charging protocol;
controlling, by the IC controller, the voltage regulator circuit to generate a magnetic charging signal at the magnetic charging interface responsive to the switch being controlled to connect the voltage regulator circuit to the magnetic charging unit; and
controlling, by the IC controller, the voltage regulator circuit to generate a charging signal at the output port responsive to the switch being controlled to connect the voltage regulator circuit to the output port.
10 . The method of claim 9 , wherein:
the wireless charging unit comprises an inverter connected to the switch; and
the method comprises:
controlling the switch to connect the voltage regulator circuit to the inverter; and
controlling the inverter to generate the magnetic charging signal.
11 . The method of claim 9 , comprising:
controlling, by the IC controller, a visual indicator of the magnetic charging unit to be in a first state responsive to the voltage regulator circuit being connected to the output port;
controlling, by the IC controller, the visual indicator to be in a second state responsive to the magnetic charging signal being generated in a full power mode; and
controlling, by the IC controller, the visual indicator to be in a third state responsive to the magnetic charging signal being generated in a reduced power mode.
12 . The method of claim 9 , comprising:
establishing, by the IC controller, a first contract with one of a first device connected to the output port or a second device connected to the magnetic charging interface; and
establishing, by the IC controller, a second contract with the other of the first device or the second device based on power remaining after satisfying the first contract.
13 . The method of claim 9 , comprising:
controlling a visual indicator of the magnetic charging interface to be in a first state responsive to the switch being controlled to connect the voltage regulator circuit to the magnetic charging unit; and
controlling the visual indicator to be in a second state responsive to the switch being controlled to connect the voltage regulator circuit to the output port.
14 . The method of claim 9 , comprising:
controlling the switch to connect the voltage regulator circuit to the wireless charging unit responsive to the connection state of the magnetic charging interface being a connected state and the connection state of the output port being a disconnected state.
15 . The method of claim 9 , comprising:
controlling the switch to connect the voltage regulator circuit to a one of the output port or the wireless charging unit having a connection state transitioning from a disconnected state to a connected state.
16 . A charging system, comprising:
an output port configured as a Universal Serial Bus Power Delivery (USB-PD) port;
a voltage regulator circuit;
a wireless charging unit configured according to a wireless charging protocol, the wireless charging unit comprising:
an inverter connected to the voltage regulator circuit; and
a magnetic charging interface; and
a charging integrated circuit (IC) controller configured to:
control the voltage regulator circuit to generate a charging signal at the output port based on a connection state of the output port; and
control the inverter to generate a magnetic charging signal at the magnetic charging interface based on a connection state of the magnetic charging interface.
17 . The charging system of claim 16 , wherein:
the wireless charging unit comprises a visual indicator; and
the charging IC controller is configured to:
control the visual indicator in a first state responsive to the connection state of the magnetic charging interface being a disconnected state;
control the visual indicator in a second state responsive to the magnetic charging signal being generated in a full power mode; and
control the visual indicator in a third state responsive to the magnetic charging signal being generated in a reduced power mode.
18 . The charging system of claim 16 , wherein the charging IC controller is configured to:
establish a first contract with one of a first device connected to the output port or a second device connected to the magnetic charging interface; and
establish a second contract with the other of the first device or the second device based on power remaining after satisfying the first contract.
19 . The charging system of claim 16 , further comprising:
a switch connected to the voltage regulator circuit, the inverter, and the output port, wherein:
the charging IC controller is configured to:
control the switch to connect the voltage regulator circuit to the output port responsive to the connection state of the output port being a connected state and the connection state of the magnetic charging interface being a disconnected state;
control the switch to connect the voltage regulator circuit to the inverter responsive to the connection state of the output port being a disconnected state and the connection state of the magnetic charging interface being a connected state; and
control the switch to connect the voltage regulator circuit to the output port and to connect the voltage regulator circuit to the inverter responsive to the connection state of the output port being a connected state and the connection state of the magnetic charging interface being a connected state.
20 . The charging system of claim 19 , wherein:
the wireless charging unit comprises a visual indicator; and
the charging IC controller is configured to control a state of the visual indicator based on a state of the switch.