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Self-adaptive threshold value short-circuit protection circuit

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

Active Publication Date: 2015-01-07
SG MICRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Self-adaptive threshold value short-circuit protection circuit
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Embodiment Construction

[0017] Below with the accompanying drawings ( figure 2 ) to illustrate the present invention.

[0018] figure 2 It is a structural schematic diagram of implementing the self-adaptive threshold short-circuit protection circuit of the present invention. Such as figure 2As 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, and 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 the input voltage, and the ...

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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 present 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 structural schematic diagram of an existing fixed-threshold short-circuit protection circuit. Traditional fixed-threshold short-circuit protection circuits such as figure 1 As shown, it includes a current source 1, which provides a preset current value Iset, the outlet end of the current source 1 is connected to the ground end 12, the inlet end of the current source 1 and the negative end (-) of the current amplifier 2 form the 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 ...

Claims

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Application Information

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