High-low voltage side double-end anti-reverse connection circuit

An anti-reverse connection circuit, high-voltage and low-voltage side technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of high heat loss, large voltage drop of anti-reverse connection circuit, etc., achieve low conduction power consumption and improve stability Effects on sex and safety

CN113725842APending Publication Date: 2021-11-30CHINA KEY SYST & INTEGRATED CIRCUIT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-11-30

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Abstract

The invention discloses a high-low voltage side double-end anti-reverse connection circuit, which belongs to the field of circuit protection and comprises a high-voltage side anti-reverse connection module, a low-voltage side anti-reverse connection module, a power-on control and protection circuit and a power-on control circuit, wherein the high-voltage side anti-reverse connection module is used for isolating the input end and the output end of the high-voltage side anti-reverse connection circuit; the low-voltage side anti-reverse connection module is used for isolating the input end and the output end of the low-voltage side anti-reverse connection circuit; the power-on control and protection circuit controls on and off of the high-voltage side anti-reverse connection module and protects the high-voltage side anti-reverse connection module; and the power-on control circuit controls on and off of the low-voltage side anti-reverse connection module. Compared with a traditional diode anti-reverse connection structure, the circuit disclosed in the invention has the advantage of being low in conduction power consumption; especially under the condition of large current, extra heat dissipation measures are not needed; in addition, the circuit has a high-voltage and low-voltage double-layer protection function, and the stability and safety of the circuit are improved.
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Description

technical field

[0001] The invention relates to the technical field of circuit protection, in particular to a double-terminal anti-reverse connection circuit on the high and low voltage sides. Background technique

[0002] In traditional circuits, in order to prevent damage to the circuit when the DC input is accidentally reversed, it is usually necessary to connect a power diode in series at the input end. Due to the large size of the power diode and the large conduction voltage drop, the power loss in the circuit It is more serious; especially in the application environment of low voltage and high current, the power consumption of power diode is more obvious, which will not only reduce the efficiency of the whole system, but also generate a lot of heat, which requires a large area radiator for heat dissipation. The anti-reverse connection circuit has been difficult to meet the needs of users. Contents of the invention

[0003] The purpose of the present invention is to ...

Examples

Embodiment 1

[0021] The invention provides a double-terminal anti-reverse connection circuit on the high and low voltage side, including a high-voltage side anti-reverse connection module, a low-voltage side anti-reverse connection module, a power-on control and protection circuit, and a power-on control circuit; the high-voltage side anti-reverse connection The module is used to isolate the input end and output end of the high-voltage side anti-reverse connection circuit; the low-voltage side anti-reverse connection module is used to isolate the input end and output end of the low-voltage side anti-reverse connection circuit; the power-on control and protection circuit control The high-voltage side anti-reverse connection module is turned on and off, and the high-voltage side anti-reverse connection module is protected; the power-on control circuit controls the low-voltage side anti-reverse connection module to be turned on and off.

[0022] The structure of the double-terminal anti-revers...