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Control circuit for synchronous rectification, power supply method thereof and isolated power conversion circuit

A control circuit and synchronous rectification technology, which is applied in the direction of high-efficiency power electronic conversion, conversion of DC power input to DC power output, and adjustment of electrical variables. It can solve the problems of large differences in power supply performance and single power supply mode, and achieve low power supply loss. Effect

Pending Publication Date: 2019-11-29
SHENZHEN KIWI MICROELECTRONICS CO LTD
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AI Technical Summary

Problems solved by technology

Its power supply mode is single, and the power supply performance varies greatly under different application conditions

Method used

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  • Control circuit for synchronous rectification, power supply method thereof and isolated power conversion circuit
  • Control circuit for synchronous rectification, power supply method thereof and isolated power conversion circuit
  • Control circuit for synchronous rectification, power supply method thereof and isolated power conversion circuit

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Embodiment Construction

[0043] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0045] The description in this part is only for several typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. The mutual replacement of the same or similar prior art means and some technical features in the embodiments is also within the scope of the description and protection of the present invention.

[0046] "Coupling" or connection in the specification includes both direct connection and indirect connection, such as connection ...

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Abstract

The invention discloses a control circuit for synchronous rectification, a power supply method thereof and an isolated power conversion circuit. The control circuit comprises a drain port, an enablingport, a power supply port and a reference ground port. The control circuit comprises a first linear voltage stabilization module and a second linear voltage stabilization module. The control circuitfurther comprises a mode discrimination module which is coupled to the enabling port, the first linear voltage stabilization module and the second linear voltage stabilization module. The mode discrimination module is used for controlling the working states of the first linear voltage stabilization module and the second linear voltage stabilization module according to the voltage of the enabling port, so that the control circuit obtains a power supply mode corresponding to the working states. According to the control circuit for synchronous rectification, the power supply method thereof and the isolated power supply conversion circuit, the power supply mode can be adjusted according to the state of the control circuit to minimize the power supply loss.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a synchronous rectification control circuit, a power supply method thereof, and an isolated power conversion circuit. Background technique [0002] The power supply mode of the synchronous rectification control circuit itself has an important influence on the efficiency and performance of the synchronous rectification circuit. The current synchronous rectification control circuit in the industry has a single power supply mode, and the power supply performance varies greatly under different application conditions. [0003] The more common power supply modules for secondary side control circuits on the market generally have three ports, namely Drain, GND, and VDD pins. Drian and GND are connected in parallel to both ends of Vds of the SR MOSFET, and the VDD pin is the power supply pin. [0004] figure 1 It is a schematic diagram of pin layout and circuit c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33592H02M3/33523H02M1/0048Y02B70/10
Inventor 张波文鹏林官秋曾强
Owner SHENZHEN KIWI MICROELECTRONICS CO LTD
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