An aerospace anti-latch circuit

An anti-latch and circuit technology, which is applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems that devices cannot work normally, and the anti-lock design of large-scale integrated circuits cannot be applied, so as to achieve reasonable design and reasonable design ideas , the effect of a small number of components

Active Publication Date: 2019-02-19
CHINA GREAT WALL IND CORP +1
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Problems solved by technology

This method is simple in design, but it is only suitable for traditional low-current devices. With the upgrading of aerospace equipment, high-density, high-power large-scale integrated circuits (FPGA, DSP, CPU) have been widely used. The IO power and The current of the nuclear power supply is relatively large. If the traditional method of connecting resistors in series is used, the voltage drop on the resistors will make the device unable to work normally. This method cannot be applied to the anti-lock-up design of large integrated circuits.

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  • An aerospace anti-latch circuit

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Embodiment Construction

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] The invention provides an aerospace anti-latch-up circuit. First, a high-performance operational amplifier and a sampling resistor are used to complete the sampling of the load current signal, convert the load current signal into a corresponding voltage, and complete the setting of the current limiting time through a first-order RC circuit. , and then compare the voltage with the preset current-limiting voltage, and then control the enable terminal of the power module, complete the power-on and power-off control of the power module, and realize the protection of the load.

[0021] The present invention consists of figure 1 As shown, it includes four parts: power module N1, current sampling module, time control module and voltage comparison module;

[0022] Wherein, the power supply module N1 supplies power to the load (integrated circuit), and its ...

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Abstract

The invention discloses an aerospace anti-latching circuit. The aerospace anti-latching circuit can effectively solve an anti-locking problem of a large-current module, has the advantages of simple and reliable circuit and less components, and is convenient for multiple paths and integral use in large quantities. A high-performance operational amplifier and a sampling resistor are firstly adopted to finish the sampling of a load current signal, the load current signal is converted into corresponding voltage, current-limiting time setting is finished through a one-order RC (Resistance-Capacitance) circuit, then, and the voltage and preset current-limiting voltage are compared so as to control the enabled end of a power supply module to finish the power-up and off control of the power supply module to realize the protection of the load.

Description

technical field [0001] The invention relates to the technical field of power supply reliability protection, in particular to an aerospace anti-latch circuit. Background technique [0002] Due to the particularity of the space environment, single event lockup (SEL) events are extremely harmful. Therefore, anti-single event lockup is one of the important parts of circuit design and a necessary means to ensure the normal operation of circuits and equipment in the space environment. [0003] Traditional anti-lock-up circuits generally adopt the method of connecting a current-limiting resistor in series at the power supply end. When a lock-up occurs, the current through the integrated circuit is limited by the resistor to ensure that the integrated circuit is not burned. This method is simple in design, but it is only suitable for traditional low-current devices. With the upgrading of aerospace equipment, high-density, high-power large-scale integrated circuits (FPGA, DSP, CPU) h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 康旭辉赵雪纲张素娟王宁
Owner CHINA GREAT WALL IND CORP
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