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Smart electronic switch

A current and integrated circuit technology, applied in the field of intelligent semiconductor switches, can solve problems such as the effective configuration of electronic fuses

Pending Publication Date: 2021-02-02
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, effective configuration of electronic fuses can be an issue

Method used

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Examples

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Embodiment Construction

[0025] Reference is made to the accompanying drawings in the following detailed description. The accompanying drawings form a part of the description and, for purposes of illustration, show examples of how the invention may be used and implemented. It is to be understood that the features of the various embodiments described herein may be combined with each other unless specifically stated otherwise.

[0026] figure 1 One example of an electronic circuit that may be used as an electronic fuse is illustrated. Therefore, this electronic circuit is also called electronic fuse circuit F. According to the present example, the electronic fuse circuit comprises an electronic switch 2 having a control node 21 and a load current path between a first load node 22 and a second load node 23 . The electronic circuit also includes a control circuit 1 coupled to the control node 21 of the electronic switch 2 and configured to drive the electronic switch 2 . The electronic fuse circuit F ...

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PUM

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Abstract

The embodiment of the invention discloses a smart electronic switch. According to the embodiment, an integrated circuit may include a power transistor coupled between a supply pin and an output pin; acurrent sensing circuit configured to sense a load current passing through the power transistor and to provide a respective current sense signal; a first configuration pin; a current output circuit configured to provide a diagnosis current at a current output pin; a diagnosis pin for receiving a diagnosis request signal; and a control circuit configured to: select a characteristic curve representing a current versus time characteristic dependent on a external circuit connected to the first configuration pin; generate a drive signal for the power transistor dependent on the selected characteristic curve and the current sense signal; and control-dependent on a pulse pattern of the diagnosis request signal-the current output circuit to set the value of the diagnosis current such that it represents the load current or the selected characteristic curve.

Description

technical field [0001] The present disclosure relates to the field of smart semiconductor switches. Background technique [0002] Almost every electrical installation (eg, in automobiles, in houses, electrical subsystems in large installations) includes one of multiple fuses to provide overcurrent protection. Standard fuses include a wire that provides a low-ohmic current path when the current through the fuse is lower than the nominal current. However, this wire is designed so that when the current through the fuse exceeds the nominal current for a certain time, the wire heats up and melts or vaporizes. Once triggered, the fuse must be replaced with a new one. [0003] Fuses are increasingly being replaced by circuit breakers. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent, overload or short circuit. The circuit breaker may include an electromechanical relay that is triggered t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/082H02H3/08
CPCH03K17/0822H02H3/08H03K2017/0806H03K2217/0027H03K17/18H03K17/08142H03K2017/6875H03K17/0828
Inventor A·迈耶M·费里塞利R·伊林
Owner INFINEON TECH AG