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DC-DC converter with protection control port

A DC-DC, protection control technology, applied in control/regulation systems, output power conversion devices, conversion of DC power input to DC power output, etc., can solve problems such as inability to protect, achieve low cost, Effects that are easy to implement

Active Publication Date: 2011-06-15
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the disadvantage of the traditional circuit is that it cannot effectively protect the common industrial hot-swap or dc-dc converter input ground suspension and other similar situations.

Method used

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  • DC-DC converter with protection control port
  • DC-DC converter with protection control port
  • DC-DC converter with protection control port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] image 3 It is the first embodiment, as shown in the figure, this embodiment is in figure 1 A protection circuit is added on the basis of the existing DC-DC converter shown, specifically, a control port protection circuit 3 is connected between the input voltage stabilizing circuit 1 and the control port of the control circuit 2 . The above-mentioned protection circuit 3 is composed of a triode Q301 and a resistor R302. The connection circuit of the above-mentioned control port is control pin CTRL→resistor R28→diode D14 cathode→diode D14 anode→compensation pin COMP; the collector of the triode Q301 is connected to the input voltage stabilization circuit 1. The power supply adjusts the base of the transistor Q2; the emitter of the transistor Q301 is connected to the control pin CTRL, and the base of the transistor Q301 is connected to the cathode of the diode D14 through the resistor R302.

[0029]The working principle of the control port protection circuit in the first...

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PUM

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Abstract

The invention discloses a DC-DC converter with a protection control port, comprising an input filter circuit, an input voltage-stabilizing circuit, a power transformer, a power switching metal oxide semiconductor (MOS) tube, an output rectification circuit, an isolation optocoupler and a control circuit. The control circuit comprises a control port and a control port protection circuit which is used for reducing the loop current of the DC-DC converter when ground wires of a power supply are suspended; and the control port protection circuit is connected between the input voltage-stabilizing circuit and the control port of the control circuit. The control port of the DC-DC converter can be ensured to be in a good condition and all functions of the DC-DC converter are normal under the condition of extremely frequent hot plug and unplug or long-term suspension of the ground wires.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a DC-DC converter with a protection control port. Background technique [0002] DC-DC conversion technology is widely used in various industrial fields. In the application, it is often necessary to turn off the output of the DC-DC converter. The shutdown is realized by applying high and low levels to a control port. Generally, it is required to use the I The / O port or output port can be controlled, so the requirements for the control port of the DC-DC converter are becoming more and more stringent, not only requiring reliable control, but also requiring the converter control port to have high reliability. [0003] In the industrial field and other fields, DC-DC converters are often realized in the form of modules to facilitate management and maintenance. The current converter is an ideal circuit, and its working principle block diagram is as follows: figure 1 As shown, it includes input fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/32
Inventor 王保均
Owner MORNSUN GUANGZHOU SCI & TECH
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