Charging system and charging method, and power adapter
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsJialiang ZHANG, Jun ZHANG, Chen TIAN, Shebiao CHEN, Jiada LI, Shiming WAN
Life of this patent
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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 sampling value and/or voltage sampling 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 of the battery.
Claims38
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, configured to output a second voltage with a second ripple waveform according to the modulated first voltage;
- a second rectifier, configured to rectify the second voltage to output a third voltage with a third ripple waveform, and the third voltage being configured to be applied to the battery charge the battery;
- a sampling unit, configured to sample a voltage and/or current outputted by the second rectifier 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 adjust 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.
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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, configured to output a second voltage with a second ripple waveform according to the modulated first voltage;
- a second rectifier, configured to rectify the second voltage to output a third voltage with a third ripple waveform;
- a sampling unit, configured to sample a voltage and/or current outputted by the second rectifier 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 adjust 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 terminal when the power adapter is coupled to the terminal.
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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 a voltage and/or current after the second rectification 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.
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Dependencies are inferred from the claim text.