Charging circuit, power adapter and charging system

A power adapter and charging circuit technology, which is applied to battery circuit devices, current collectors, circuit devices, etc., can solve the problems of inconvenience to carry around and the bulk of the power adapter.

Pending Publication Date: 2022-07-01
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the technical solution of the relevant power adapter, especially in the technical solution of the power adapter for charging the mobile terminal, the volume of the power adapter is relatively large, and it is not convenient to carry it around.

Method used

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  • Charging circuit, power adapter and charging system
  • Charging circuit, power adapter and charging system
  • Charging circuit, power adapter and charging system

Examples

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Embodiment Construction

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0032] To charge the device to be charged through the power adapter, it is necessary to convert the input 220V alternating current into a stable low-voltage direct current suitable for the needs of the device to be charged, so as to provide the power management device and battery of the device to be charged to realize the charging of the device to be charged.

[0033] For details, please refer to figure 1 , a schematic diagram of a power adapter used to charge the device to be charged is given. The power adapter 100 is connected to a 220V AC power, and the 220V AC power is converted into a low-voltage DC power (eg, 5V, 15V, 25V or other voltage values) acceptable to the device to be charged 200 through the charging circuit 101, and the fi...

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PUM

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Abstract

The invention discloses a charging circuit, a power adapter and a charging system, and belongs to the technical field of charging. The charging circuit is applied to the power adapter, and comprises a voltage conversion unit used for processing an input alternating current to output a first pulsating direct current voltage; the voltage sampling unit is used for sampling the pulsating direct-current voltage output by the voltage conversion unit to obtain a sampling voltage; the negative input end of the comparator unit is connected with the output end of the voltage sampling unit, the positive input end of the comparator unit is connected with a reference voltage supply end, and the comparator unit is used for comparing the sampling voltage with a preset reference voltage and outputting a comparison signal; and the switch unit is used for being switched on under the condition that the comparator unit outputs the low level to enable the charging circuit to output voltage and being switched off under the condition that the comparator unit outputs the high level to enable the charging circuit not to output voltage, and the voltage output by the charging circuit is the target pulsating direct-current voltage. According to the invention, the size of the adapter can be reduced.

Description

technical field [0001] The present application relates to the technical field of charging, and in particular, to a charging circuit, a power adapter and a charging system. Background technique [0002] Currently, mobile terminals (such as smart phones) are increasingly favored by consumers, but mobile terminals consume a lot of power and need to be charged frequently. Usually, the mobile terminal is charged through a power adapter; wherein, the power adapter converts the input 220V alternating current into a stable low-voltage direct current (such as 5V) suitable for the needs of the mobile terminal, and then provides the mobile terminal to charge the battery of the mobile terminal. [0003] In the related technical solution of the power adapter, especially in the technical solution of the power adapter for charging the mobile terminal, the volume of the power adapter is relatively large, which is inconvenient to carry around. SUMMARY OF THE INVENTION [0004] Embodiments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02
CPCH02J7/02
Inventor 江森龙田晨
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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