# US 12,763,592 B2 · Charging circuit, charging control method, and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,592 B2 - Document ID: US12763592B2 - Status: Granted - Kind: B2 - Application number: 18/247,716 - Filed: 2023-01-03 - Published: 2024-11-07 - Granted: 2026-10-13 - Earliest claimed: 2022-04-14 - Assignees: Honor Device Co., Ltd. - Applicants: Honor Device Co., Ltd. - Inventors: Yingqun Feng; Fei Xu; Dawei Li - Web page: https://patentgrep.com/patent/US12763592B2 ## CPC - H02J 7/64: against overvoltage - H02J 7/40: characterised by the exchange of charge or discharge related data - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A charging control method, and an electronic device are provided. The charging circuit includes a first power supply terminal, a second power supply terminal, a controller, a first switch, a second switch, a first charging chip, and a second charging chip. The second charging chip supports a fast charging protocol. The first power supply terminal is coupled to the first charging chip through the first switch and coupled to the second charging chip through the second switch, and the first power supply terminal is configured to be coupled to a charger. The first charging chip and the second charging chip are further coupled to the second power supply terminal, to be coupled to a battery. The first charging chip is coupled to a communication terminal of the charger. The first charging chip communicates with the charger to determine that the charger supports the fast charging protocol. ## Claims ### Claim 1 A charging circuit, comprising a first power supply terminal, a second power supply terminal, a controller, a first switch, a second switch, a first charging chip, and a second charging chip, wherein the first switch is coupled to the first charging chip and the second switch is coupled to the second charging chip, and the second charging chip supports a fast charging protocol; wherein the first charging chip comprises a charging protocol negotiation circuit, an on-the-go (OTG) circuit, and a selection switch; the first power supply terminal is coupled to the first charging chip through the first switch and coupled to the second charging chip through the second switch, and the first power supply terminal is configured to be coupled to a power supply terminal of a charger; the first charging chip and the second charging chip are further coupled to the second power supply terminal, and the second power supply terminal is configured to be coupled to a battery; and the charging protocol negotiation circuit is configured to be coupled to a communication terminal of the charger; the charging protocol negotiation circuit is configured to communicate with the charger to determine that the charger supports the fast charging protocol; the controller is configured to control the first switch to open, control the second switch to close, and control the selection switch to couple the charging protocol negotiation circuit to the battery through the OTG circuit of the first charging chip, so that the battery supplies power to the charging protocol negotiation circuit through the OTG circuit of the first charging chip; and the charging protocol negotiation circuit is further configured to control, based on the fast charging protocol, the charger to increase a charging voltage, to fast charge the battery by using the second charging chip. ### Claim 2 (depends on 1) The charging circuit according to claim 1, wherein after fast charging ends, the first charging chip is further configured to control the charger to decrease a charging voltage; and the controller is further configured to control the first switch to close, control the second switch to open, and control the first charging chip to obtain power from the charger and charge the battery. ### Claim 3 (depends on 1) The charging circuit according to claim 1, wherein the charging circuit further comprises a voltage divider circuit, and the first switch comprises a control terminal, a first controlled terminal, and a second controlled terminal; and the first controlled terminal is coupled to the first power supply terminal, the second controlled terminal is coupled to the first charging chip, the voltage divider circuit is configured to divide a voltage of the first power supply terminal for output to the control terminal, and when a voltage of the control terminal is higher than a threshold, the first controlled terminal is disconnected from the second controlled terminal. ### Claim 4 (depends on 3) The charging circuit according to claim 3, wherein the voltage divider circuit comprises a first resistor and a second resistor that are connected in series, the first power supply terminal is grounded through the first resistor and the second resistor that are connected in series, and coupling terminals of the first resistor and the second resistor are coupled to the control terminal of the first switch. ### Claim 5 (depends on 3) The charging circuit according to claim 3, wherein the charging circuit further comprises a diode, the controller is coupled to an anode of the diode, a cathode of the diode is coupled to the control terminal of the first switch, and the controller controls disconnection or connection between the first controlled terminal and the second controlled terminal by controlling the voltage of the control terminal of the first switch. ### Claim 6 (depends on 1) An electronic device, comprising the charging circuit according to claim 1 and a battery, wherein the charging circuit is configured to charge the battery. ### Claim 7 A charging control method, applied to an electric device comprising a battery and a charging circuit configured to charge the battery, wherein the charging circuit comprises a controller, a first switch, a second switch, a first charging chip, and a second charging chip, the first charging chip comprises a charging protocol negotiation circuit, an on-the-go (OTG) circuit, and a selection switch, the second charging chip supports a fast charging protocol, and the method comprises: communicating, by the charging protocol negotiation circuit, with a charger to determine that the charger supports the fast charging protocol; controlling, by the controller, the first switch to disconnect the first charging chip from the charger, controlling the second switch to connect the second charging chip to the charger, and controlling the selection switch to couple the charging protocol negotiation circuit to the battery through the OTG circuit of the first charging chip, supply power from the battery to the charging protocol negotiation circuit through the OTG circuit of the first charging chip; and controlling, by the charging protocol negotiation circuit based on the fast charging protocol, the charger to increase a charging voltage, to fast charge the battery by using the second charging chip. ### Claim 8 (depends on 7) The method according to claim 7, further comprising: after fast charging ends, controlling, by the first charging chip, the charger to decrease a charging voltage; and controlling, by the controller, the first switch to connect the first charging chip to the charger, controlling the second switch to disconnect the second charging chip from the charger, and controlling the first charging chip to obtain power from the charger and charge the battery. ### Claim 9 A charging circuit, comprising a first power supply terminal, a second power supply terminal, a controller, a first switch, a second switch, a first charging chip, and a second charging chip, wherein the first switch is coupled to the first charging chip and the second switch is coupled to the second charging chip, wherein the first charging chip comprises a charging protocol negotiation circuit, an on-the-go (OTG) circuit, and a selection switch; the second charging chip supports a fast charging protocol; the first power supply terminal is coupled to the first charging chip through the first switch and coupled to the second charging chip through the second switch, and the first power supply terminal is configured to be coupled to a power supply terminal of a charger; the first charging chip and the second charging chip are further coupled to the second power supply terminal, and the second power supply terminal is configured to be coupled to a battery; and the charging protocol negotiation circuit is configured to be coupled to a communication terminal of the charger; the charging protocol negotiation circuit is configured to communicate with the charger to determine that the charger supports the fast charging protocol; the controller is configured to control the first switch to open, control the second switch to close, and control the selection switch to couple the charging protocol negotiation circuit to the battery through the OTG circuit of the first charging chip, so that the battery supplies power to the charging protocol negotiation circuit through the OTG circuit of the first charging chip; the charging protocol negotiation circuit is further configured to control, based on the fast charging protocol, the charger to increase a charging voltage, to fast charge the battery by using the second charging chip, wherein the charging circuit further comprises a voltage divider circuit coupled between the first power supply terminal and the first switch, and the voltage divider circuit is configured to divide a voltage at the first power supply terminal for output to the first switch. ### Claim 10 (depends on 9) The charging circuit according to claim 9, wherein after fast charging ends, the first charging chip is further configured to control the charger to decrease a charging voltage; and the controller is further configured to control the first switch to close, control the second switch to open, and control the first charging chip to obtain power from the charger and charge the battery. ### Claim 11 (depends on 9) The charging circuit according to claim 9, wherein the charging circuit further comprises a voltage divider circuit, and the first switch comprises a control terminal, a first controlled terminal, and a second controlled terminal; the first switch comprises a control terminal, a first controlled terminal, and a second controlled terminal; and the first controlled terminal is coupled to the first power supply terminal, the second controlled terminal is coupled to the first charging chip, the voltage divider circuit is configured to divide the voltage of the first power supply terminal for output to the control terminal, and when a voltage of the control terminal is higher than a threshold, the first controlled terminal is disconnected from the second controlled terminal. ### Claim 12 (depends on 9) The charging circuit according to claim 9, wherein the voltage divider circuit comprises a first resistor and a second resistor that are connected in series, the first power supply terminal is grounded through the first resistor and the second resistor that are connected in series, and coupling terminals of the first resistor and the second resistor are coupled to the control terminal of the first switch. ### Claim 13 (depends on 9) The charging circuit according to claim 9, wherein the charging circuit further comprises a diode, the controller is coupled to an anode of the diode, a cathode of the diode is coupled to the control terminal of the first switch, and the controller controls disconnection or connection between the first controlled terminal and the second controlled terminal by controlling the voltage of the control terminal of the first switch. ### Claim 14 (depends on 6) The electronic device according to claim 6, wherein the charging circuit further comprises a voltage divider circuit, and the first switch comprises a control terminal, a first controlled terminal, and a second controlled terminal; and the first controlled terminal is coupled to the first power supply terminal, the second controlled terminal is coupled to the first charging chip, the voltage divider circuit is configured to divide a voltage of the first power supply terminal for output to the control terminal, and when a voltage of the control terminal is higher than a threshold, the first controlled terminal is disconnected from the second controlled terminal. ### Claim 15 (depends on 14) The electronic device according to claim 14, wherein the voltage divider circuit comprises a first resistor and a second resistor that are connected in series, the first power supply terminal is grounded through the first resistor and the second resistor that are connected in series, and coupling terminals of the first resistor and the second resistor are coupled to the control terminal of the first switch. ### Claim 16 (depends on 15) The electronic device according to claim 15, wherein the charging circuit further comprises a diode, the controller is coupled to an anode of the diode, a cathode of the diode is coupled to the control terminal of the first switch, and the controller controls disconnection or connection between the first controlled terminal and the second controlled terminal by controlling the voltage of the control terminal of the first switch. ### Claim 17 (depends on 15) The electronic device according to claim 15, wherein the charging protocol negotiation circuit and the on-the-go OTG circuit are integrated in the first charging chip and the first charging chip does not support the fast charging protocol. ### Claim 18 (depends on 8) The method according to claim 8, wherein the charging circuit further comprises a voltage divider circuit, and the method further comprises dividing a voltage of the first power supply terminal for output to the first switch. ### Claim 19 (depends on 1) The charging circuit according to claim 1, wherein the first charging chip further comprises a first voltage conversion circuit, a second voltage conversion circuit, and the selection switch, both of the first voltage conversion circuit and the second voltage conversion circuit are coupled to a controlled terminal of the first switch, and the first voltage conversion circuit is further coupled to the charging protocol negotiation circuit; the selection switch is configured to select, by a control of the controller, the first voltage conversion circuit when the first switch is closed and the second switch is opened or the second voltage conversion circuit to be coupled to the battery when the first switch is opened and the second switch is closed, when the selection switch is coupled to the first voltage conversion circuit, the first voltage conversion circuit is coupled to the battery, and the first voltage conversion circuit is configured to provide a charging voltage for the charging protocol negotiation circuit and a charging voltage for the battery, and when the selection switch is coupled to the second voltage conversion circuit, the second voltage conversion circuit is coupled to the battery, and the second voltage conversion circuit is configured to provide a charging voltage from the battery to the charging protocol negotiation circuit through the first voltage conversion circuit. ### Claim 20 (depends on 19) The charging circuit according to claim 19, wherein the first voltage conversion circuit is a low dropout regulator, and the second voltage conversion circuit is the on-the-go OTG circuit.