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Wide-voltage power supply control circuit

A technology of power control circuit and control circuit, which is applied in the direction of circuit device, emergency power supply arrangement, emergency protection circuit device, etc., to achieve the effect of small size, smooth switching and high reliability

Active Publication Date: 2017-06-30
NORTH ELECTRON RES INST ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the prior art, solve the problem of power input control, and provide a control circuit that meets the requirements of wide voltage and voltage

Method used

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Embodiment Construction

[0030] The implementation of this solution will be described in detail below in conjunction with the accompanying drawings.

[0031] Depend on figure 1 As shown, the wide-voltage power supply control circuit of the present invention includes two-way input protection circuit 11, input detection circuit 12, insurance fault indication circuit 13 and MOSFET control circuit 14, and the output ends of two-way MOSFET control circuit 14 are respectively connected to MOSFET drive circuit 15. The output terminal of the MOSFET drive circuit 15 is the power supply output. The MOSFET failure indication circuit 16 is used to indicate the abnormality of the MOSFET driving circuit 15 .

[0032] In this embodiment, the voltage of the input power supply is a wide power supply input range of 10V-100V.

[0033] combine figure 2 As shown, the input protection circuit 11 completes the protection of the input power, prevents the reverse connection of the input power from destroying the system an...

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PUM

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Abstract

The invention relates to a wide-voltage power supply control circuit which comprises an input protecting circuit, an input detecting circuit, a fuse fault indicating circuit, a control circuit, a driving circuit and an MOSFET fault indicating circuit. The input protecting circuit prevents reverse connection of two input power supplies. The input detecting circuit determines whether the two input power supplies satisfy a lowest input 10V requirement. The fuse fault indicating circuit performs fuse fault indicating on the two input power supplies. The control circuit controls the door electrode of the two-path MOS tube. The driving circuit drives the two input power supplies. The wide-voltage power supply control circuit can operate in the voltage 10V-100V. When the polarity of the power supply input end is in reverse connection, a power supply loop can be switched off automatically, thereby preventing damage of a load system caused by reverse voltage impact. The wide-voltage power supply control circuit has quick reverse current switching-off capability, and the switching-off time is not longer than 500ns, thereby effectively preventing backflow of load energy to the power supply input end or interference between the two input power supplies. Smooth switching between the two input power supplies can be realized, no oscillation occurs in the switching process.

Description

technical field [0001] The invention relates to a wide-voltage power supply control circuit, which belongs to the technical field of circuits. Background technique [0002] In order to prevent major damage to the system caused by power failure, advanced telecommunication computing platforms and military electronic equipment usually need to use dual input power supplies. When one power supply fails or the polarity of the power input terminal is reversed, the power circuit can be automatically cut off. Avoid the load system from being damaged by the back pressure impact, and at the same time, the two input power sources can realize smooth switching. [0003] Existing power supply control systems often connect power diodes in series to the power input circuit. Due to the fixed voltage drop of the diodes, for some low-voltage applications, the system may not work properly. Secondly, for some high-current applications, because the voltage drop of the diode is relatively fixed, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02M1/00H02M1/32H02H11/00
CPCH02H11/003H02J9/061H02M1/00H02M1/32H02J9/068H02M1/0038H02M1/0083
Inventor 于春香张勇李金宝李建和高慧
Owner NORTH ELECTRON RES INST ANHUI CO LTD
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