Short-circuit protection circuit

A technology for short-circuit protection circuits and resistors, which is applied to emergency protection circuit devices, circuit devices, and overcurrent-responsive protection. It can solve problems such as complex structures, burned circuits, and fires, and achieve stable and reliable performance. The effect of less components and simple structure

Inactive Publication Date: 2012-03-21
SUZHOU HEXINMEI ELECTRONICS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, a short circuit will bring unnecessary harm. In the light case, the circuit will be burned, and in severe cases, it may cause a fire. In order to avoid the occurrence of the above situation, various short circuit protection circuits have appeared in the prior art, but most of them have complicated structures. There are more functional modules, and the price is more expensive. On the one hand, this increases the cost of input, and at the same time, the complexity of the structure also increases the instability of product quality.

Method used

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Embodiment Construction

[0011] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0012] see figure 1 As shown, a short circuit protection circuit includes a first voltage input terminal Vo, the first voltage input terminal Vo is grounded through a first voltage dividing resistor RA and a second voltage dividing resistor RB, and the first voltage dividing resistor RA The connection end of the second voltage dividing resistor RB is connected to the base of the transistor Q1 through the third resistor R3, the collector of the transistor Q1 is connected to the second voltage input terminal Vin through the first resistor R1, and the emitter of the transistor Q1 is grounded The connection end of the triode Q1 to the first resistor R1 is taken out as a voltage output terminal Vex, and a light emitting diode D1 is further connected between the collector and the emitter of the triode Q1.

[0013] Further, a second filter...

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Abstract

The invention discloses a short-circuit protection circuit. The short-circuit protection circuit comprises a first voltage input end which is grounded with a second divider resistor through a first divider resistor, the connecting end of the first divider resistor connecting with the second divider resistor is connected to the base electrode of a triode through a third resistor, the collecting electrode of the triode is connected to the input end of a second voltage through a first resistor, the emitting electrode of the triode is grounded, the triode is led out from the connecting end of the first resistor to serve as a voltage output end, and an LED is arranged between the collecting electrode and the emitting electrode of the triode in a bridging manner. The short-circuit protection circuit uses fewer circuit components, and has a simple structure, stable properties, and popularization and use values.

Description

technical field [0001] The invention relates to a protection circuit, in particular to a short circuit protection circuit. Background technique [0002] As we all know, a short circuit will bring unnecessary harm. In the light case, the circuit will be burned, and in severe cases, it may cause a fire. In order to avoid the occurrence of the above situation, various short circuit protection circuits have appeared in the prior art, but most of them have complicated structures. There are more functional modules, and the price is more expensive. On the one hand, this increases the cost of input, and at the same time, the complexity of the structure also increases the instability of product quality. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a short-circuit protection circuit with simple circuit structure and stable and reliable performance. [0004] In order to achieve the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08H02H3/04
Inventor 胡国良魏王江
Owner SUZHOU HEXINMEI ELECTRONICS SCI & TECH CO LTD
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