Charger reverse-connection-prevention circuit and electronic device

A technology of anti-reverse connection circuit and electronic equipment, which is applied in the direction of emergency protection circuit devices and electrical components, etc., can solve the problems of low circuit efficiency, large voltage drop and large loss of anti-reverse connection circuit, so as to improve the service life and solve the problem of pressure loss. The effect of excessive drop and power consumption and protection damage

Inactive Publication Date: 2014-09-17
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problems of large voltage drop, large loss and low circuit efficiency in the anti-reverse connection circuit in the prior art

Method used

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  • Charger reverse-connection-prevention circuit and electronic device
  • Charger reverse-connection-prevention circuit and electronic device

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] see figure 1 , is a circuit diagram of a charger anti-reverse connection circuit (hereinafter referred to as the anti-reverse connection circuit) according to an embodiment of the present invention. The anti-reverse connection circuit includes:

[0030] Transistor Q1, thyristor Q2, first resistor R1, second resistor R2, third resistor R3 and fourth resistor R4, the connection relationship of the above components is: the emitter of triode Q1 and the positive ...

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Abstract

The embodiment of the invention discloses a charger reverse-connection-prevention circuit comprising a triode Q1, a silicon controlled rectifier Q2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4. The emitter of the triode Q1 is connected with the anode of a voltage input end and is connected with one end of the third resistor R3. The base electrode of the triode Q1 is respectively connected with the other end of the third resistor R3 and one end of the fourth resistor R4. The collector of the triode Q1 is respectively connected with the one end of the first resistor R1. The embodiment of the invention also discloses an electronic device. By adopting the circuit and the device, the power consumption of the circuit can be effectively reduced.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a charger anti-reverse connection circuit and electronic equipment. Background technique [0002] Reverse connection refers to the situation where the positive and negative poles of the power adapter are reversed. The general way to prevent reverse connection is to add a diode to the circuit, and use the unidirectional conductivity of the diode to suppress the flow of reverse current. , There will be a voltage drop loss on the diode, and the loss will increase with the increase of the current. In a circuit with a large current, the circuit may be undervoltage due to too large a voltage drop. [0003] In the prior art, usually the DC power input anti-reverse connection protection circuit uses the unidirectional conductivity of the diode to realize the anti-reverse connection protection. This connection method is simple and reliable, but the power consumption is affected when a large ...

Claims

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Application Information

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IPC IPC(8): H02H7/18H02H11/00
Inventor 周明杰管伟芳
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD
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