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Low voltage blocking circuit in DC converter

A DC voltage, blocking circuit technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve problems such as unsafe, inability to output voltage at secondary output terminals

Inactive Publication Date: 2006-01-25
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned method has the following problem: when the operation is performed in the lockout mode, since the operation of the pulse conversion system is stopped until the conversion control system 20 lowers the voltage to the reset voltage, even if the voltage does not drop to the reset voltage at this time, If the IC resets the voltage and the lockout mode is not released and the input voltage exceeds the reset voltage, it cannot output any voltage to the secondary output terminal; and because the voltage must be lowered to the reset voltage instantaneously in order to reset the switching control system 20, so an unsafe action must be performed

Method used

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Embodiment Construction

[0021] Hereinafter, an ideal example of the low-voltage blocking circuit in the DC / DC converter designed according to the present invention will be described in detail with reference to the accompanying drawings.

[0022] image 3 Shown is a structural diagram of a low-voltage blocking circuit in a DC / DC converter to which the present invention is applied, and is composed of the following: In a DC / DC converter that obtains a DC voltage through an input terminal and outputs rated power through an output terminal , obtain the DC voltage and generate the pulse width modulation signal, and output the conversion control system 20 of the conversion signal accordingly; convert the DC voltage according to the conversion signal, and guide different secondary sides and auxiliary coils with different turns ratios to more than one secondary side and auxiliary coil A voltage conversion and transformation system 10; a low-voltage blocking system 30 that compares the DC voltage with the volt...

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Abstract

A low voltage blocking circuit of DC / DC converter can execute change - over action and output voltage to secondary output end in DC / DC converter when the converter receives DC voltage through input end and outputs rated power through output end under state as the same to mode that locking is released since lowering voltage to IC reset voltage is not required.

Description

(1) Technical field [0001] The present invention relates to a DC / DC converter that obtains a DC voltage through an input terminal and outputs a rated power through an output terminal, especially when a low voltage is applied by a conversion method due to problems such as overloading of the output terminal of the power supply, in a specific The invention relates to a low-voltage blocking circuit in a direct current / direct current converter of a voltage reset (Reset) conversion control method. (2) Background technology [0002] figure 1 Shown is a configuration diagram of a conventional conversion mode DC / DC converter. For example, a DC power supply for a conversion mode DC / DC converter consists of the following ( figure 1 Not shown in the figure): rectification system that rectifies the common AC voltage supplied externally and outputs DC voltage; through more than one load surface power line with different turn ratios, the DC applied from the rectification system through t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28
Inventor 张成基洪硕浚
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI