Circuit for preventing reverse connection of power supply and lamp

A power supply anti-reverse connection and power supply technology, which is applied in the layout of electric lamp circuits, electric light sources, emergency protection circuit devices, etc., can solve the problems of poor reliability and high power consumption, and achieve the effects of reducing heat generation, reducing power consumption and improving efficiency.

Active Publication Date: 2010-10-13
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a power supply anti-reverse connection circuit, aiming at

Method used

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  • Circuit for preventing reverse connection of power supply and lamp
  • Circuit for preventing reverse connection of power supply and lamp
  • Circuit for preventing reverse connection of power supply and lamp

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] In the embodiment of the present invention, a MOS transistor with a smaller conduction voltage drop is used to control the on-off of the main circuit current. power supply to the load.

[0016] figure 1 The structural principle of the power supply anti-reverse connection circuit provided by the embodiment of the present invention is shown, and for the convenience of description, only the parts related to this embodiment are shown.

[0017] refer to figure 1 , the power supply anti-reverse connection circuit includes a MOS tube control unit 1, a load RL and a MOS tube Q, figure 1 J1 and J...

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Abstract

The invention is suitable for the field of the electronic circuit and provides a circuit for preventing reverse connection of a power supply. The circuit for preventing reverse connection of the power supply comprises an MOS tube control unit and an MOS tube, wherein the MOS tube control unit is connected between a positive input end of the power supply and a grid electrode of the MOS tube; a source electrode of the MOS tube is earthed; and a drain electrode of the MOS tube is connected with a negative input end of the power supply. The circuit for preventing reverse connection of the power supply, which is provided by the invention, can effectively prevent reverse connection. An on resistance of an MOS is small (can be milliohms) so as to reduce the power consumption of a main current circuit, improve efficiency of the whole circuit, reduce heat generation and improve reliability of a product applying the circuit.

Description

technical field [0001] The invention belongs to the field of electronic circuits, and in particular relates to a power supply anti-reverse connection circuit and a lamp. Background technique [0002] With the wide application of LEDs and other light sources that require positive and negative polarity wiring of the input power supply in the lighting field, the anti-reverse connection circuit design of the power supply input of the lamp is also very important in the design of the entire lamp circuit. [0003] Most of the anti-reverse connection circuit design of the input power supply of lamps now is to add diodes to the input circuit to prevent reverse connection, but the voltage drop of the diode is very large. If the current flowing through the diode is large, the power consumption of the diode will be large. The temperature rise of the diode will be relatively high, which will affect the reliability of the entire lamp. Contents of the invention [0004] The purpose of t...

Claims

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Application Information

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IPC IPC(8): H02H11/00H05B37/00
Inventor 周明杰张成良
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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