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A single-wire constant current to constant voltage power conversion circuit

A constant current to constant voltage, electric energy conversion technology, applied in the direction of constant current power supply DC circuit, output power conversion device, DC power input conversion to DC power output, etc., can solve problems such as the difficulty of constant voltage source, and achieve overvoltage Effect of protection and enable output

Active Publication Date: 2017-07-14
HUNAN HAIDUN OPTICAL FIBER SENSING TECH ENG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is only one wire on the cable and a constant current value passes through it, it is extremely difficult to obtain the constant voltage source required by the load with the traditional method

Method used

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  • A single-wire constant current to constant voltage power conversion circuit
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  • A single-wire constant current to constant voltage power conversion circuit

Examples

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Embodiment 1

[0054] The invention integrates a CC / CV conversion module, a 50mS uninterrupted power supply module, an overvoltage protection module, a soft start and enabling module, and an induced current bypass module generated by the earth's magnetic field and solar wind on one PCB board. Moreover, the output power of the constant voltage source can be easily adjusted and upgraded, and it has the function of electromagnetic compatibility (EMC).

[0055] like figure 2 The realization of the constant voltage source shown is obtained from the single-wire constant current source through the charging voltage value of the control capacitor, and its output power is determined by the constant current value passing through a single wire and the charging voltage value of the control capacitor. Realize the overvoltage protection of the constant voltage source and the soft start and enable output functions of the subsequent DC / DC module (such as Figure 4 shown). The voltage monitoring chip U1 ado...

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Abstract

The invention discloses a single-line constant-current-to-constant-voltage electric energy conversion circuit, comprising a current bypass, a CC / CV main circuit and a MOS tube drive circuit; the CC / CV main circuit and the current bypass are connected in series in a single-line constant current output path Middle; current bypass includes NMOS transistor Q1 and resistor R1; CC / CV main circuit includes diode D1, capacitors C1 and C2, resistor R2 and voltage regulator tube D3; the anode of diode D1 is connected to the input end of current bypass; the diode D1 The negative electrode is connected to the output terminal of the current bypass through the capacitor C1; the resistor R2, the capacitor C2 and the voltage regulator tube D3 form an output branch; the MOS transistor drive circuit is powered by the output branch to provide trigger pulses for the NMOS transistor Q1. The single-line constant-current-to-constant-voltage power conversion circuit is easy to implement and cleverly designed, and is especially suitable for single-line power supply occasions.

Description

technical field [0001] The invention relates to a single-line constant current to constant voltage electric energy conversion circuit. Background technique [0002] In the field of traditional DC power supply, whether it is a constant voltage source or a constant current source, two wires are used for power supply, that is, a power line and a return line. In the long-distance optical fiber communication, especially in the application of submarine optical fiber communication, due to the characteristics of single-line constant current power supply and the advantages of cost, photoelectric composite cables are mostly used. There is a layer of shielded copper tube on the photoelectric composite cable. The power supply of the load on the cable is realized by using this layer of copper tube to provide a constant current. It has only one wire, and its return line is realized by using sea water or the earth. Because there is only one wire on the cable and a certain constant current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02J1/04
Inventor 夏建林李友如陶令胡艳红陈志才
Owner HUNAN HAIDUN OPTICAL FIBER SENSING TECH ENG LAB
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