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Low-voltage starting circuit capable of bearing high voltage and having reverse-phase protection function

A reverse-phase protection and low-voltage start-up technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as inability to apply low-voltage and high-voltage simultaneous actions, inconformity with electronic products, and increased manufacturing costs, so as to maintain power supply effect, stable power supply effect, and streamlined circuit effect

Inactive Publication Date: 2010-07-14
DIODES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The power supply circuit is the main driving force required in various electronic products. An electronic product with excellent computing power and functions will be like scrap iron without this part, and it will not work normally. Although the traditional power supply circuit is technically It is mature, but it can only work within a certain range of voltage, and cannot be used for simultaneous operation of low voltage and high voltage. If you want to obtain a larger working range or have a more stable power supply, you must add many parts inside, so First, the manufacturing cost will increase significantly, and the volume will be too large to occupy space, which does not meet the needs of the development trend of electronic products becoming more and more streamlined and smaller.

Method used

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  • Low-voltage starting circuit capable of bearing high voltage and having reverse-phase protection function
  • Low-voltage starting circuit capable of bearing high voltage and having reverse-phase protection function
  • Low-voltage starting circuit capable of bearing high voltage and having reverse-phase protection function

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Embodiment Construction

[0013] In order to make it easier for your examiners to understand other features and advantages of the present invention, and the effects achieved by it can be more apparent, the present invention is now described in detail with the accompanying drawings as follows:

[0014] Such as figure 1 , 2 As shown, the present invention is a low-voltage start-up circuit capable of withstanding high voltage and having a reverse phase protection function, which mainly includes: a first switching transistor 11 and a second switching transistor 12 that switch and conduct two NPs with different polarities. The switch pins of the latter are different and connected to the power input terminal 21 and the power output terminal 20, wherein:

[0015] The first switch transistor 11 is N-type, its drain is coupled to the power input terminal 21, its source is coupled to the power output terminal 20, its gate is coupled to a node 49 of a voltage stabilizing circuit 4, and The voltage stabilizing c...

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Abstract

The invention relates to a low-voltage starting circuit capable of bearing a high voltage and having a reverse-phase protection function. The low-voltage starting circuit mainly comprises a first switch transistor and a second switch transistor which have different NP polarities and are alternatively turned on, wherein switch pins of the first switch transistor and the second switch transistor are different from each other and are connected to a power supply input end and a power supply output end; a grid of the first switch transistor is coupled on a node of a voltage-stabilizing circuit; a grid of the second switch transistor is connected on a node of a switch control unit; and the switch control unit comprises a voltage division circuit, a multi-stage switch control circuit, a voltage hysteresis circuit and a working mode, in which an output voltage is acquired by the power supply output end corresponding to an input voltage of the power supply input end through the circuit. Therefore, the working range can be enlarged by using an effectively simplified circuit and the reverse-phase protection function is achieved. Simultaneously, the low-voltage starting circuit can be started at a low voltage or the high voltage, and stable power supply effect can be kept when the voltage hysteresis circuit is in a critical state of high and low-voltage frequent variations.

Description

technical field [0001] The invention relates to a low-voltage starting circuit, in particular to a low-voltage starting circuit capable of withstanding high voltage and having reverse-phase protection function. Background technique [0002] The power supply circuit is the main driving force required in various electronic products. An electronic product with excellent computing power and functions will be like scrap iron without this part, and it will not work normally. Although the traditional power supply circuit is technically It is mature, but it can only work within a certain range of voltage, and cannot be used for simultaneous operation of low voltage and high voltage. If you want to obtain a larger working range or have a more stable power supply, you must add many parts inside, so Firstly, the manufacturing cost will increase significantly, and the volume will be too large to occupy space, which does not meet the needs of the development trend of electronic products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56G05F1/569
Inventor 李明辉
Owner DIODES INC
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