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Electronic switch and method of operation thereof

A technology of electronic switches and electronic circuits, applied in the direction of circuits, circuit devices, electrical components, etc., can solve problems such as complex manufacturing and supply processes

Active Publication Date: 2020-01-17
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this complicates the manufacturing and supply process

Method used

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  • Electronic switch and method of operation thereof
  • Electronic switch and method of operation thereof
  • Electronic switch and method of operation thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0081] Example 1: An electronic circuit comprising: a plurality of electronic switches, each of which comprises a load path and a control node, wherein the load path is connected in parallel between a first load node and a second load of the electronic circuit between nodes; a current sensing circuit configured to sense a load current between the first load node and the second load node and generate a current sense signal representative of the load current; a drive circuit configured to and driving the plurality of electronic switches based on at least one input signal; and an overload detector. The overload detector is configured to receive the current sense signal and selection information, and generate an overload signal based on the current sense signal and the selection information.

example 2

[0082] Example 2: The electronic circuit of Example 1, wherein the driver circuit is configured to receive the overload signal and disable the plurality of electronic switches when the overload signal indicates that an overload condition has been detected.

example 3

[0083] Example 3: The electronic circuit of any one of examples 1 and 2, wherein the overload detector comprises: a filter configured to generate a filter output signal based on filtering the filter input signal; and comparing A filter circuit configured to compare the filter output signal with a threshold signal and generate the overload signal based on the comparison, wherein the filter input signal is dependent on the current sense signal, and wherein, The threshold signal depends on the selection information.

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PUM

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Abstract

Electronic circuits and methods of operation thereof are disclosed. The electronic circuit includes: a plurality of electronic switches, each electronic switch including a load path and a control node, wherein the load path is connected in parallel between a first load node and a second load node of the electronic circuit; a current sensing circuit configured to A load current is sensed between the first load node and the second load node to generate a current sense signal representative of the load current; a drive circuit configured to drive a plurality of electronic switches based on at least one input signal; and an overload detector. The overload detector is configured to receive a current sense signal and selection information, and generate an overload signal based on the current sense signal and selection information.

Description

technical field [0001] The present disclosure relates generally to electronic switches and protection circuits, and more particularly to electronic circuits operable as electronic switches and electronic fuses. Background technique [0002] Fuses are protective devices that trip on the current level of the current and on the duration for which the current level prevails. For example, if the current is above the maximum current, the fuse will trip almost immediately, if the current is at or below the rated current, the fuse will not trip, and if the current is between the rated current and the maximum current, the fuse will trip Trips after a delay time on the current level. Fuses can be used to protect the load and the cables between the source and the load. The function of a fuse can be achieved using an electronic switch and drive circuit. [0003] In complex systems, multiple electrical loads and thus multiple fuses may be required. For example, in an automobile, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08
CPCH02H3/08H03K17/0822H02H3/087
Inventor 阿尔方斯·格拉夫
Owner INFINEON TECH AG