Synchronous rectification circuit and charging circuit using it

A technology of synchronous rectification and charging circuit, which is applied in the direction of circuit devices, battery circuit devices, collectors, etc., and can solve the problems that the battery cannot be fully charged and the number of components is small.
CN104104228BActive Publication Date: 2017-06-06NANJING SILERGY SEMICON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING SILERGY SEMICON TECH CO LTD
Publication Date
2017-06-06

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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.
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Description

technical field

[0001] The invention relates to power electronics technology, in particular to a synchronous rectification circuit and a charging circuit using the same. Background technique

[0002] The synchronous rectification technology uses a metal oxide field effect transistor (MOSFET) to replace a Schottky diode (Schottky Diode) so as to help reduce the overall power consumption of the circuit.

[0003] The synchronous rectification circuit needs to be equipped with a control circuit to control the conduction state of the rectification transistor. The existing control circuit has a complex structure, a large number of components, and occupies a large chip area, which makes the manufacturing cost of the synchronous rectification circuit relatively high. Contents 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...

Claims

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