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Isolation DC-DC power supply module meeting GJB181 standard

A GJB181, DC-DC technology, applied in the direction of electrical components, adjusting electrical variables, high-efficiency power electronics conversion, etc., can solve the problem of losing the ability to suppress inrush current, achieve small changes in switching frequency, reduce system costs, and improve efficiency Effect

Inactive Publication Date: 2018-07-31
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the defects of the above two patents are that there is an interval time requirement, and the thermistor with a negative temperature coefficient under continuous switching will lose the ability to suppress the surge current

Method used

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  • Isolation DC-DC power supply module meeting GJB181 standard
  • Isolation DC-DC power supply module meeting GJB181 standard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An isolated DC-DC power supply module conforming to the GJB181 standard, used to meet the power supply requirements of airborne low-power equipment. like figure 1 As shown, it includes fuses connected in sequence, EMI filter circuit, anti-reverse connection protection circuit, transient spike discharge circuit, surge current suppression circuit, Buck-Boost circuit, LLC resonant conversion circuit, secondary rectification and filter circuit , a feedback and zero detection circuit, a control and protection circuit, and an isolated drive circuit, where the isolated drive circuit is connected to the LLC resonant conversion circuit.

[0034] The fuse is used to prevent excessive input current caused by abnormal operation of the power supply; avoid affecting other electrical equipment in the same system; select a self-recovery fuse to avoid input overcurrent;

[0035] The EMI filter circuit is used to prevent the EMI interference of the DC-DC power module; avoid affecting ot...

Embodiment 2

[0053] According to the isolated DC-DC power module according to the GJB181 standard described in Embodiment 1, the difference is that the anti-reverse connection protection circuit includes a Schottky diode with a large flow rate and a small voltage drop; a transient spike discharge circuit Including the TVS diode with large flow rate; use its reverse breakdown principle to protect the post-stage sensitive circuit, pay attention to the working voltage and clamping voltage of TVS here.

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Abstract

The invention relates to an isolation DC-DC power supply module meeting the GJB181 standard. The isolation DC-DC power supply module comprises a fuse tube, an EMI filter circuit, an anti-reverse-connection protection circuit, a transient peak pulse bleeder circuit, a surge current suppression circuit, a Buck-Boost circuit and an LLC resonant conversion circuit which are connected in turn. The self-restoring type fuse tube is selected so that input overcurrent can be avoided; the positive and negative surge peak voltage is controlled to the acceptable degree of the DC-DC switching power supplyby the transient peak pulse bleeder circuit; the problem of excessively high surge current can be solved by the active surge current suppression circuit; the Buck-Boost wide voltage circuit handles the input overvoltage / undervoltage situation; and the LLC resonant converter topology realizes soft switching so that the overvoltage stress of the switch MOSFET can be reduced and the stored electromagnetic energy can be increased, and the switching frequency and efficiency of the converter can be effectively enhanced.

Description

technical field [0001] The invention relates to an isolated DC-DC power supply module conforming to the GJB181 standard, and belongs to the technical field of DC-DC power supply modules. Background technique [0002] Switching power supply has many advantages in terms of size, efficiency, cost and reliability, and has been widely used in various industries. The ordinary use environment can meet the requirements with almost no redundant design. However, in the military airborne use environment , There are over / undervoltage surges, transient peaks, and instantaneous power interruptions in the power supply. Due to the particularity of the environment, it also has clear requirements for the instantaneous start-up surge current. Due to the particularity of the use of airborne equipment, GJB181 puts forward clear requirements for airborne electrical equipment and ensures that it can work stably under harsh power supply conditions. Taking the inrush current test as an example, ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/48
CPCH02M3/33569H02M7/48H02M7/4815Y02B70/10
Inventor 徐成焱赵瑞东于豪光张丽
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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