A Hybrid Capacitor-Inductance Charger Architecture and Its Charging Mode Switching Control Method

Abstract

The invention discloses a hybrid capacitor-inductance charger architecture and a charging mode switching control method thereof, which mainly solves the problem that the existing switched capacitor charger cannot work under the condition of fixed input high voltage and the application occasions are limited. The charger architecture includes a total of 10 power transistors, 5 capacitors and an inductor. Among them, Q1-Q8, CFLY1 / CFLY2 and inductor L are the main body of the charger, which realizes the voltage-current power conversion. Q9 is used to prevent flow from the battery side to V BUS The reverse current is normally constant conduction mode. Q10 realizes the detection and protection of the charging current, works in the linear control mode in the trickle charging stage, and works in the constant conduction mode in the constant current and constant voltage charging stages. C1, C2 and C3 are filter capacitors. Through the above design, the present invention realizes high-power and high-efficiency charging under fixed high-voltage input conditions, without adding additional protocol chips at the adapter end and the mobile phone end, thereby reducing costs. Therefore, it is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery chargers, in particular to a hybrid capacitor-inductor charger architecture and a charging mode switching control method thereof. Background technique [0002] Due to the demand for high-power charging of electronic devices such as mobile phones, the current charger architecture is rapidly developing in the direction of high-power. When the charging power reaches a certain level, the traditional buck charging architecture cannot meet the requirements due to its low efficiency. [0003] Such as figure 1 As shown, it is the solution selected by most mobile phone manufacturers in the high-power charging architecture, including a main charger (buck charger) and a slave charger (switched capacitor charger). Among them, the buck charger works in the trickle charging and constant voltage charging stages of the entire charging cycle, and the switched capacitor charger works in the constant c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hybrid capacitor inductance charger architecture and its charging mode switching control method, which mainly solves the problem that the existing switched capacitor charger cannot work under the condition of fixed input high voltage and the application occasions are limited

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