A series power expansion circuit and method

Abstract

The invention discloses a series power expansion circuit and method, which relate to the field of power supply design. The circuit includes: a voltage regulation circuit control module, a bypass module, a first power supply module and a second power supply module. The voltage value required by the load is judged accordingly to switch the output mode of the power supply. If the required voltage is greater than the preset threshold voltage, the bypass module is controlled to be turned on, and the first power module directly supplies power to the load through the bypass module; if the required voltage is lower than the preset threshold voltage If the threshold voltage is set, the bypass module is controlled to be closed, and the first power module supplies power to the load through the second power module connected in series; Segment output and seamless switching can effectively solve the problems of low efficiency, small dynamic range, large size and breakpoint switching of multi-port wide voltage output adapters. It has the advantages of low cost, high efficiency, constant power output, and continuously adjustable output voltage. .

Description

technical field [0001] The invention relates to the field of power supply design, in particular to a series power expansion circuit and method. Background technique [0002] With the continuous development of society, under the dominance of market applications, power adapter products are increasingly required to be small, light, high efficiency, low radiation, and low cost to meet various electronic terminal equipment, especially for large dynamic voltages such as TYPE C. Even more so with the output PD adapter. The low-voltage, high-current or constant-power output multi-port PD adapters on the market have a serious problem, that is, the dynamic range is small, and the product is not easy to design. The traditional method is to design the main power supply as a high-voltage output power supply first, and then Through the output of multiple DC-DC step-down circuits, the advantage of this circuit is that the product frame is simple and clear at a glance, and the debugging is...

AI Technical Summary

Problems solved by technology

The low-voltage, high-current or constant-power output multi-port PD adapters on the market have a serious problem, that is, the dynamic range is small, and the product is not easy to design. The traditional method is to design the main power supply as a high-voltage output power supply first, and then Through the output of multiple DC-DC step-down circuits, the advantage of this circuit is that the product frame is simple and clear at a glance, and the debugging is also very fast. The disadvantage is that the AC power supply and the DC-DC power supply repeat a large power, that is, the DC-DC power supply power also needs To achieve the same power output as the AC power supply, this leads to very low efficiency and high cost of the product, and it is difficult to pass the US DOE VI and European ERP energy efficiency standards, which leads to the failure of such multi-voltage output PD adapter products. Difficult to make small

[0003] Therefore, it is necessary to design a series power expansion circuit and method to provide solutions to the problems of low efficiency, small dynamic range, large volume and constant power output of multi-port wide voltage output adapters

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