Charging system, charging method, and power adapter
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsJialiang Zhang, Chen Tian, Jun Zhang, Shebiao Chen, Shiming Wan, Jiada Li
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Abstract
The present disclosure discloses a charging system, a charging method, and a power adapter. The charging system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, and a control unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current value and/or voltage value sampled by the sampling unit, such that a third voltage with a third ripple waveform outputted by the second rectifier meets a charging requirement. The third voltage is applied to the battery.
Claims30
A power adapter, comprising:
- a first rectifier, configured to rectify an input alternating current and output a first voltage with a first ripple waveform;
- a switch unit, configured to modulate the first voltage according to a control signal and output a modulated first voltage;
- a transformer, having a primary winding and a secondary winding, and configured to output a second voltage with a second ripple waveform according to the modulated first voltage;
- a second rectifier, coupled to the secondary winding, and configured to rectify the second voltage to output a third voltage with a third ripple waveform, wherein the third voltage is configured to be introduced into a terminal to charge a battery in the terminal when the power adapter is coupled to the terminal;
- a sampling unit, configured to sample voltage and/or current at the primary winding to obtain a voltage sampling value and/or a current sampling value;
- and
- a control unit, coupled to the sampling unit and the switch unit respectively, and configured to output the control signal to the switch unit, and to change an output of the second rectifier by adjusting a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value such that the third voltage meets a charging requirement of the battery of the terminal when the power adapter is coupled to the terminal to be charged.
A charging system, comprising:
- a battery;
- a first rectifier, configured to rectify an input alternating current and output a first voltage with a first ripple waveform;
- a switch unit, configured to modulate the first voltage according to a control signal and output a modulated first voltage;
- a transformer, having a primary winding and a secondary winding, and configured to output a second voltage with a second ripple waveform according to the modulated first voltage;
- a second rectifier, coupled to the secondary winding, and configured to rectify the second voltage to output a third voltage with a third ripple waveform;
- a sampling unit, configured to sample voltage and/or current at the primary winding to obtain a voltage sampling value and/or a current sampling value;
- and
- a control unit, coupled to the sampling unit and the switch unit respectively, and configured to output the control signal to the switch unit, and to change an output of the second rectifier by adjusting a duty ratio of the control signal according to the current sampling value and/or the voltage sampling value such that the third voltage meets a charging requirement of the battery.
A charging method, comprising:
- performing a first rectification on an input alternating current to output a first voltage with a first ripple waveform;
- modulating the first voltage by controlling a switch unit, and outputting a second voltage with a second ripple waveform by a conversion of a transformer;
- performing a second rectification on the second voltage to output a third voltage with a third ripple waveform, and applying the third voltage to a battery;
- sampling voltage and/or current at a primary winding of the transformer to obtain a voltage sampling value and/or a current sampling value;
- and
- adjusting a duty ratio of a control signal for controlling the switch unit according to the voltage sampling value and/or the current sampling value such that the third voltage meets a charging requirement of the battery.
Dependencies are inferred from the claim text.