Linear adjustable power converter based on PD protocol and charging method

Abstract

The invention discloses a linear adjustable power converter based on a PD protocol and a charging method. The power converter can perform intermediate conversion between a PD power supply adapter andelectric equipment. The VBUS voltage obtained from the PD power adapter can be adjusted to a target voltage required by the electric equipment; power is supplied to electric equipment (such as a traditional notebook computer, a router, an optical modem, an LED table lamp and the like). Different electric equipment can use the same PD power adapter, resource sharing can be achieved, the applicationrange of the PD power adapter is expanded, and the problem that if an original charger is damaged, a common user cannot find a proper power adapter easily can be solved. According to the charging method, communication with the PD power adapter is established through a PD protocol handshake module, a PWM voltage regulation and control mode is adopted, the method is simple, and output can be adjusted according to a set target voltage value to be used by the electric equipment.

Description

technical field [0001] The invention belongs to the technical field of adapters, in particular to a conversion device for intermediate conversion between an adapter and electric equipment and a charging method thereof. Background technique [0002] In daily life, there are many electrical equipment powered by low-voltage direct current. The input voltage is usually in the range of 5-20V, and it is difficult to achieve uniformity. Therefore, each product will be equipped with a dedicated power adapter, but the power adapter of each product They cannot be mixed, and resources cannot be shared, which is easy to cause waste of resources. Sometimes the power adapters are not easy to distinguish, and often burn down office equipment or household appliances due to wrong connections. If the original charger is damaged, it is difficult for ordinary users to find a suitable power adapter. [0003] The current PD power adapter is becoming smaller and smaller, but the existing PD power...

AI Technical Summary

Problems solved by technology

[0002] In daily life, there are many electrical equipment powered by low-voltage direct current. The input voltage is usually in the range of 5-20V, and it is difficult to achieve uniformity. Therefore, each product will be equipped with a dedicated power adapter, but the power adapter of each product They cannot be mixed, and resources cannot be shared, which is easy to cause waste of resources. Sometimes the power adapters are not easy to distinguish, and often burn down office equipment or household appliances due to wrong connections.

If the original charger is damaged, it is difficult for ordinary users to find a suitable power adapter

[0003] The current PD power adapter is becoming smaller and smaller, but the existing PD power adapter is only limited to powering mobile phones, tablets, and notebook computers, and its scope of application is narrow. In addition, for 5V, 12V, 20V and PD3.0 in PD2.0 Several voltage values ​​stipulated in 5V, 9V, 12V, and 20V cannot cover the charging voltage required by various electrical equipment, and it is difficult for traditional electrical equipment to be compatible with PD power supplies other than their dedicated power adapters. The adapter protocol handshake cannot communicate effectively, so the specific voltage value required by the target device cannot be obtained

[0004] Although there are some general-purpose power adapters, which mainly obtain the required power supply voltage and current by manually adjusting the parameters of electronic components, this control technology has obvious defects: the control is not flexible, and the adjusted value cannot be accurately known , It is also easy to cause burning out of electrical equipment or insufficient power supply, unsafe to use, and lack of humanization

In this patent application CN201610951378.9, by using the PWM signal to control the DC / DC chip, although different voltage outputs can be controlled without requiring more control signals, and the area of ​​the PCB can be saved, the following problems still exist: Different electrical equipment can use the same PD power adapter, and resource sharing cannot be achieved

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