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Power supply converter capable of protecting input low-voltage

A power converter, input undervoltage technology, applied in emergency protection circuit devices, output power conversion devices, electrical components, etc., can solve the problems of easy runaway, failure, uncontrollable circuit power consumption, etc., to improve reliability. and stability, controllable power consumption, low power consumption

Inactive Publication Date: 2010-08-25
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the undervoltage state, due to the frequent swing of the input voltage at the threshold point of the power supply, the working state of the internal circuit of the power supply is not clear, so that the product is prone to run out of control and malfunction in the undervoltage state, and the power consumption of the circuit is uncontrollable

Method used

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  • Power supply converter capable of protecting input low-voltage
  • Power supply converter capable of protecting input low-voltage
  • Power supply converter capable of protecting input low-voltage

Examples

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Embodiment Construction

[0015] As shown in Figures 1 and 2, a power converter of a self-oscillating flyback circuit in the present invention includes an undervoltage protection circuit, a frequency generating circuit, an absorbing circuit, a feedback circuit, a transformer and an output circuit. One line of input power is connected to the same-named end of the primary winding N1 of the transformer, and the absorption circuit is connected to both ends of the primary winding N1 of the transformer in parallel, the opposite-named end of the primary winding N1 is connected to the frequency generating circuit, and one end of the feedback circuit is connected to the feedback winding N3 of the transformer The end with the same name, the other end of the feedback circuit is connected to the frequency generating circuit, and the undervoltage protection circuit is connected between the power input end and the frequency generating circuit.

[0016] The undervoltage protection circuit includes a second voltage div...

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PUM

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Abstract

The invention discloses a power supply convertor inputting under-voltage protection, which comprises a frequency generating circuit, an absorbing circuit, a feedback circuit, a transformer and an output circuit, an under-voltage protection which is connected between an electric quantity input end and a frequency generating circuit. Because the product inner circuit is provided with under-voltage protection function, so ensuring that the power supply inner circuit is in the closed state under state of inputting under-voltage, the circuit power consumption can be controlled, thereby improving the reliability and stability of the circuit.

Description

technical field [0001] The invention relates to a power converter of a self-oscillating flyback circuit, in particular to a power converter capable of realizing the function of input undervoltage protection. Background technique [0002] In the conversion power supply circuit, the stability of the output voltage is particularly important, so it is necessary to integrate some protection circuits inside the power supply. In the undervoltage state, because the input voltage frequently swings at the power supply threshold point, the working state of the internal circuit of the power supply is not clear, so that the product is prone to run out of control and malfunction in the undervoltage state, and the power consumption of the circuit is uncontrollable. Contents of the invention [0003] Aiming at the problems occurring in the undervoltage state, the purpose of the present invention is to provide a simple and low-cost power converter with undervoltage protection function, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02H7/122
Inventor 尹向阳
Owner MORNSUN GUANGZHOU SCI & TECH
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