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Adaptive Threshold Short Circuit Protection Circuit

A short-circuit protection circuit and self-adaptive threshold technology, which is applied to emergency protection circuit devices, electrical components, etc., to achieve cost-saving effects

Active Publication Date: 2017-05-17
SG MICRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Adaptive Threshold Short Circuit Protection Circuit
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Embodiment Construction

[0017] Below in conjunction with the attached drawings ( figure 2 ) Describe the present invention.

[0018] figure 2 It is a schematic diagram of the structure of the adaptive threshold short-circuit protection circuit implementing the present invention. Such as figure 2 As shown, the adaptive threshold short-circuit protection circuit includes a short-circuit detection logic circuit 11, and the short-circuit detection logic circuit 11 includes a first reference level terminal Vref1 and a second reference level terminal Vref2. The first reference level terminal Vref1 passes through the first The input voltage detector 13 is connected to the input voltage terminal Vin of the chip circuit, and the second reference level terminal Vref2 is connected to the input voltage terminal Vin of the chip circuit through the second input voltage detector 14. Both the first input voltage detector 13 and the second input voltage detector 14 are used to detect input voltage, and the first i...

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Abstract

The invention discloses a self-adaptive threshold value short-circuit protection circuit. The self-adaptive threshold value of a short-circuit protection circuit can be automatically changed along with changes of the input voltage of a chip, and is not fixed. The self-adaptive threshold value short-circuit protection circuit is characterized by comprising a short-circuit detection logic circuit. The short-circuit detection logic circuit comprises a first reference level end and a second reference level end, the first reference level end is connected with the input voltage end of a chip circuit through a first input voltage detector, and the second reference level end is connected with the input voltage end of the chip circuit through a second input voltage detector.

Description

Technical field [0001] The invention relates to chip circuit short-circuit protection technology, in particular to an adaptive threshold short-circuit protection circuit. The adaptive threshold means that the threshold of the short-circuit protection circuit can automatically change with changes in chip input voltage, and is no longer a fixed threshold. . Background technique [0002] figure 1 It is a schematic diagram of the existing fixed threshold short-circuit protection circuit structure. Traditional fixed threshold short circuit protection circuit such as figure 1 As shown, a current source 1 is included, which provides a preset current value Iset, the outlet end of the current source 1 is connected to the ground terminal 12, and the inlet end of the current source 1 and the negative end (-) of the current amplifier 2 form a first node A, so The first node A is connected to the input voltage terminal Vin through a preset resistor Rset; the positive terminal (+) of the curr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/20
Inventor 林克龙
Owner SG MICRO