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Synchronous rectifying circuit and charging circuit comprising same

A technology of synchronous rectification and charging current detection, applied in circuit devices, battery circuit devices, current collectors, etc., can solve the problems of small number of devices and inability to fully charge the battery

Active Publication Date: 2014-10-15
NANJING SILERGY SEMICON TECH CO LTD
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Problems solved by technology

[0004] In view of this, a synchronous rectification circuit with a simple structure and a small number of components and a charging circuit using it are provided. On the one hand, the structure of the synchronous rectification circuit is simplified, and on the other hand, the existing charging circuit is easily unable to fully charge the battery.

Method used

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  • Synchronous rectifying circuit and charging circuit comprising same
  • Synchronous rectifying circuit and charging circuit comprising same
  • Synchronous rectifying circuit and charging circuit comprising same

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Embodiment Construction

[0040] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these details. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0041] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes, and the drawings are not necessarily drawn to scale.

[0042] At the same time, it should be understood that in the following description, “circuit” refers to a conductive loop formed by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" anoth...

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Abstract

Disclosed are a synchronous rectifying circuit and a charging circuit comprising the same. The synchronous rectifying circuit comprises a rectifying transistor and a synchronous rectifying control circuit, wherein the synchronous rectifying control circuit is used for generating synchronous rectifying control signals according to the voltage difference between the drain electrode and the source electrode of the rectifying transistor to control on and off of the rectifying transistor. The synchronous rectifying circuit is simple in structure, small in number of devices and low in cost. When applied to the charging circuit, the synchronous rectifying circuit can overcome the problem that a battery is difficult to be fully charged.

Description

Technical field [0001] The invention relates to power electronics technology, in particular to a synchronous rectifier circuit and a charging circuit using the synchronous rectifier circuit. Background technique [0002] Synchronous rectification technology uses metal oxide field effect transistors (MOSFETs) to replace Schottky diodes (Schottky Diode) to help reduce the overall power consumption of the circuit. [0003] The synchronous rectifier circuit needs to be equipped with a control circuit to control the conduction state of the rectifier transistor. The existing control circuit has a complex structure, a large number of components, and a large chip area, which makes the manufacturing cost of the synchronous rectifier circuit high. Summary of the invention [0004] In view of this, a synchronous rectification circuit with a simple structure and a small number of components and a charging circuit using the same are provided. On the one hand, the structure of the synchronous rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02J7/00
CPCY02E60/10
Inventor 邓甫华
Owner NANJING SILERGY SEMICON TECH CO LTD
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