A dc-dc circuit and a method for power control thereof

CN117154861BActive Publication Date: 2026-05-29SHENZHEN HUNTKEY ELECTRIC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN HUNTKEY ELECTRIC
Filing Date
2022-09-05
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies for improving mobile terminal charging speed have charging safety issues, making it difficult to increase charging speed while ensuring safety.

Method used

By employing a DC-DC circuit and its power control method, the control unit detects the maximum withstand voltage and current of the device being charged, and combines voltage and current loops to limit the output voltage and current in order to increase the charging speed within a safe range.

Benefits of technology

While ensuring safety, make full use of the maximum power capacity of the device being charged to reduce charging time and improve user experience.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117154861B_ABST
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Abstract

The application provides a DC-DC circuit and a power control method thereof. The method comprises the following steps: after detecting that an output end of the DC-DC circuit is connected to a charged device, requesting a maximum bearing voltage and a maximum bearing current from the charged device, until obtaining the maximum bearing voltage at a first time, calculating a limit current by taking a ratio of a test upper limit power and the maximum bearing voltage; during a period from a time when the charged device is connected to the first time: maintaining an output voltage at a default voltage, and maintaining an output current below a default current; during a period from the first time to a set time: maintaining the output voltage at the maximum bearing voltage, and maintaining the output current to be greater than the test upper limit current and below the maximum bearing current; after the set time: maintaining the output voltage at the maximum bearing voltage, and maintaining the output current below a smaller one of the test upper limit current and the limit current.
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