Adapter and charging control method

A charging control method, applied in an adapter,

• wherein the adapter comprises:
• a primary unit, configured to convert an input alternating current into a first current with a first pulsating waveform, wherein the adapter is configured to be capable of operating in a constant current mode, and a peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode;
• a power adjustment unit, configured to sample current outputted by the adapter to obtain a current sampling value and to module the first current according to the current sampling value;
• and
• a secondary unit, configured to convert current coupled from the primary unit to the secondary unit into the current outputted by the adapter, wherein the current outputted by the adapter is a second current with a second pulsating waveform, and a peak value of the second current is equal to the current value corresponding to the current limiting point of the constant current mode;
• wherein the adapter is configured to support a first charging mode and a second charging mode, a charging speed of the adapter in the second charging mode is faster than that in the first charging mode, the adapter is configured to charge the device to be charged by using a constant current mode in the second charging mode, and the method comprises:
• performing a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode when the adapter is coupled to the device to be charged.

A charging System, comprising:

• a device to be charged;
• an adapter,
• wherein the adapter is configured to support a first charging mode and a second charging mode, a charging speed of the adapter in the second charging mode is faster than that in the first charging mode, the adapter is configured to charge the device to be charged by using a constant current mode in the second charging mode;
• wherein the adapter comprises:
• a primary unit, configured to convert an input alternating current into a first current with a first pulsating waveform, wherein the adapter is configured to be capable of operating in a constant current mode, and a peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode;
• a power adjustment unit, configured to sample current outputted by the adapter to obtain a current sampling value and to module the first current according to the current sampling value;
• a secondary unit, configured to convert current coupled from the primary unit to the secondary unit into the current outputted by the adapter, wherein the current outputted by the adapter is a second current with a second pulsating waveform, and a peak value of the second current is equal to the current value corresponding to the current limiting point of the constant current mode;
• a charging interface;
• and a control unit, configured to perform a bidirectional communication with the device to be charged via a data wire of the charging interface so as to control output of the adapter in the second charging mode.