A Hybrid Seamless Mode Transition Buck-Boost Switching Power Converter
A power converter and boost switch technology, applied in the electronic field, can solve problems such as large output voltage ripple, discontinuous output current, and poor transient response, and achieve continuous output current, improved efficiency, and low voltage ripple Effect
Active Publication Date: 2022-08-09
GUANGDONG UNIV OF TECH
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[0008] The purpose of the present invention is to provide a hybrid seamless mode transition buck-boost switching power converter to solve the problem of poor efficiency and mode transition between buck-boost in the prior art when the voltage conversion ratio is 1 , and the high conduction loss caused by the large inductor current, there is also a discontinuous output current in the boost mode, which leads to a large output voltage ripple and the right half-plane zero point in the circuit structure in this mode. Problems that lead to poor transient response
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[0028] For the traditional buck-boost inductive switching power converter and the structure proposed by Jinwoo Jeon and Hongseok Shin, the hybrid buck-boost switching power converter cannot simultaneously satisfy seamless mode transition, high efficiency, low inductor current, low To solve the problems of voltage stress, continuous output current and eliminating the zero point of the right half plane, the present invention proposes a hybrid seamless mode transition buck-boost switching power converter, such as figure 1 shown, including:
[0029] Six MOS switching devices S1 to S6, one inductor L, two flying capacitors C F1 , C F2 ; figure 1 middle C O is the load capacitance; among them, S1, S2, S4, S5 use PMOS transistors, S3, S6 use NMOS transistors, and the gates of S1 to S6 are respectively connected to the control signal V S1 to V S6 ;
[0030] The source of S1 is connected to the input voltage VIN , the drain is connected to one end of the inductor L and the flying...
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The invention discloses a buck-boost switching power converter with hybrid seamless mode transition, comprising: six MOS switching devices S1 to S6, one inductor L, and two flying capacitors C F1 , C F2 and the load capacitance C O ; Among them: the source of S1 is connected to the input voltage V IN , the drain is connected to one end of the inductor L and the flying capacitor C F1 The upper plate of ; the source of S2 is connected to the drain of S3 and the flying capacitor C F1 of the lower plate, the drain of S2 is connected to the input voltage V IN ; The source of S3 is connected to the ground level; the source of S4 is connected to the other end of the inductor L and the flying capacitor C F2 The upper plate of S4, the drain of S4 is connected to the source of S5 and the load capacitor C O of the upper plate and connect the output voltage V OUT , the load capacitance C O The lower plate of the ground level; the drain of S5 is connected to the drain of S6 and the flying capacitor C F2 The lower plate of S6; the source of S6 is connected to the ground level. The invention realizes seamless mode transition, eliminates the influence of the zero point of the right half plane of the boosting mode on the transient response of the circuit load, avoids complicated control circuits, and reduces manufacturing difficulty and cost.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a buck-boost switching power converter with a hybrid seamless mode transition. Background technique [0002] In recent years, buck-boost switching power converters have been widely used in mobile devices powered by lithium batteries, such as RF power amplifiers, battery chargers, and LED drivers. Lithium batteries usually have an input voltage range of 2.5V-4.2V, and their output voltage will gradually decrease during use. Many applications of buck-boost switching power converters powered by Li-ion batteries set the target output voltage at around 3.3V, in order to be able to provide a target output voltage of 3.3V to the load over the entire input voltage range of the Li-ion battery and Extending battery life, a switching power converter capable of buck and boost is highly desirable. [0003] The traditional buck-boost switching power converter can obtain a very high conve...
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IPC IPC(8): H02M3/158H02M1/14
CPCY02B70/10
Inventor 陈显发余凯李思臻
Owner GUANGDONG UNIV OF TECH