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US 2018/0123383 A1Published application
Charging system and charging method for terminal and power adapter
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsChen TIAN, Jialiang ZHANG
Life of this patent
Estimating the term…
Abstract
A charging system, a charge method, and a power adapter are provided. The charging system includes a battery, a first rectifying circuit, a switch circuit, a transformer, a second rectifying circuit, a sampling circuit, and a control circuit. The control circuit outputs a control signal to the switch circuit, and regulates a duty cycle of the control signal according to the current sampling value so that the voltage with the third pulsating waveform satisfies a requirement of charging the battery.
Claims30
A charging system, comprising:
- a battery;
- a first rectifying circuit, configured to rectify an alternating current to voltage with a first pulsating waveform;
- a switch circuit, configured to modulate the voltage with the first pulsating waveform according to a control signal;
- a transformer, configured to output voltage with a second pulsating waveform according to the modulated voltage with the first pulsating waveform;
- a second rectifying circuit, configured to rectify the voltage with the second pulsating waveform to voltage with a third pulsating waveform;
- a first current sampling circuit, configured to sample current outputted by the second rectifying circuit to obtain a current sampling value, the first current sampling circuit selectively operable in a first current sampling mode and a second current sampling mode;
- a mode switch circuit, configured to control the first current sampling circuit to switch between the first current sampling mode and the, second current sampling mode;
- and
- a control circuit, coupled to the first current sampling circuit, the mode switch circuit, and the mode switch circuit, the control circuit configured to output the control signal to the switch circuit, configured to control the mode switch circuit to control the first current sampling circuit operating in the first current sampling mode or the second current sampling mode based on a charging mode, and configured to regulate a duty cycle of the control signal according to the current sampling value so that the voltage with the third pulsating waveform satisfies a requirement of charging the battery. and
6 more elements
2-31. (canceled)
An power adapter, comprising:
- a first rectifying circuit, configured to rectify an alternating current to voltage with a first pulsating waveform;
- a switch circuit, configured to modulate the voltage with the first pulsating waveform according to a control signal;
- a transformer, configured to output voltage with a second pulsating waveform according to the modulated voltage with the first pulsating waveform;
- a second rectifying circuit, configured to rectify the voltage with the second pulsating waveform to voltage with a third pulsating waveform;
- a first charging interface, coupled to the second rectifying circuit and configured to apply the voltage with the third pulsating waveform to a battery of a terminal through a second charging interface of the terminal when the second charging interface of the terminal couples to the first charging interface, wherein the battery is coupled to the second charging interface;
- a first current sampling circuit, configured to sample current outputted by the second rectifying circuit to obtain a current sampling value, the first current sampling circuit selectively operable in a first current sampling mode and a second current sampling mode;
- a mode switch circuit, configured to control the first current sampling circuit to switch between the first current sampling mode and the second current sampling mode;
- and
- a control circuit, coupled to the first current sampling circuit, the mode switch circuit, and the switch circuit, the control circuit configured to output the control signal to the switch circuit, configured to control the mode switch circuit to control the first current sampling circuit operating in the first current sampling mode or the second current sampling mode based on a charging mode, and configured to regulate a duty cycle of the control signal according to the current sampling value so that the voltage with the third. pulsating waveform satisfies a requirement of charging.
6 more elements
46-50. (canceled)
A charging method of charging a terminal, comprising:
- rectifying an alternating current to output voltage with a first pulsating waveform when a first charging interface of a power adapter couples a second charging interface of the terminal;
- modulating, by controlling a mode switch circuit, the voltage with the first pulsating waveform, and converting, by a transformer, the modulated voltage with the first pulsating waveform into voltage with a second pulsating waveform;
- rectifying the voltage with the second pulsating waveform to output voltage with a third pulsating waveform, and applying the voltage with the third pulsating waveform to a battery of the terminal through the second charging interface;
- sampling current corresponding to the voltage with the third pulsating waveform to obtain a current sampling value, wherein the first current sampling circuit is selectively operable in a first current sampling mode and a second current sampling mode;
- and
- controlling the first current sampling circuit to operate in the first current sampling mode or the second current sampling mode according to a charging triode, and regulating a duty cycle of the control signal according to the current sampling value so that the voltage with the third pulsating waveform satisfies a requirement of charging.
3 more elements
58-60. (canceled)
62-66. (canceled)
69-78. (canceled)
Dependencies are inferred from the claim text.