An off-state load disconnection detection circuit

A technology of open circuit detection and load circuit, which is applied in the field of detection circuit, which can solve the problems of high withstand voltage requirements of the post-stage shaping unit, large layout area, damage to the post-stage shaping unit, etc., to reduce the layout area and avoid circuit no-load , The effect of improving the reliability of the circuit

Active Publication Date: 2022-04-15
西安翔腾微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the load circuit open state, the load voltage V out close to the larger supply voltage V high , when V high When working in a wide range of voltage, it may cause damage to the post-stage shaping unit, which requires high withstand voltage for the post-stage shaping unit, and the shaping circuit is a high-voltage circuit, which occupies a large layout area

Method used

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  • An off-state load disconnection detection circuit
  • An off-state load disconnection detection circuit
  • An off-state load disconnection detection circuit

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Embodiment Construction

[0034] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, an off-state load disconnection detection circuit according to the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] The aforementioned and other technical contents, features and effects of the present invention can be clearly presented in the following detailed description of specific implementations with accompanying drawings. Through the description of specific embodiments, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the accompanying drawings are only for reference and description, and are not used to explain the technical aspects of the present invention. program is limited.

[0036] It should be noted that in this article, relational terms such ...

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Abstract

The invention discloses an off-state load disconnection detection circuit, which includes a switch module, a load on-off judging module and a control module, wherein the switch module is connected to the load circuit to be tested to provide current for the load circuit to be tested; the load on-off judging module Connected to the load circuit to be tested, used to receive the load voltage from the load circuit to be tested and generate a voltage judgment signal according to the load voltage; the control module is connected to the load on-off judgment module and the switch module, used to judge the load to be tested according to the voltage judgment signal Whether the circuit is disconnected, and the control switch module is continuously turned off when the load circuit to be tested is disconnected. The off-state load disconnection detection circuit of the present invention can identify whether the load circuit is disconnected when the power tube is switched off, and control the power tube to keep disconnected when the load circuit is disconnected, so as to prevent damage to the chip circuit.

Description

technical field [0001] The invention belongs to the technical field of detection circuits, and in particular relates to an off-state load disconnection detection circuit. Background technique [0002] The high-side power driver chip is used to provide output current for the ground load, the internal logic circuit of the chip controls the opening of the power tube, and the internal power tube of the chip provides current for the ground load. In order to understand the working state of the load circuit, it is necessary to detect whether there is an open circuit in the load circuit when the power tube is turned off. When the power tube of the chip is in the off state, and the load is disconnected due to an operation error or other reasons, the error status needs to be reported to the logic control circuit, and the power tube is turned off through the logic control circuit. The circuit that realizes this part of the function is an off-state load disconnection detection circuit....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/28G01R31/54
CPCG01R31/2853
Inventor 郎静谢运祥党思佳陈智晁苗苗白鹏李梓南
Owner 西安翔腾微电子科技有限公司
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