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Direct-current power supply hot plug slow starting control circuit and control method

A technology of slow-start circuit and DC power supply, which is applied in the direction of electrical components and output power conversion devices, etc. It can solve the problems of converter output power failure, discrete component characteristic parameter drift, MOS tube avalanche breakdown, etc., and achieve simple circuit, It is convenient for economical selection and avoids the effect of avalanche breakdown

Active Publication Date: 2012-07-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a DC power supply slow-start control circuit and control method to solve the problem of the drift of the characteristic parameters of the existing discrete components, the power-off of the converter output caused by the too fast power-on of the controlled circuit, and the low capacitance value of the power port capacitance. The problem of avalanche breakdown of MOS tube caused by large

Method used

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  • Direct-current power supply hot plug slow starting control circuit and control method
  • Direct-current power supply hot plug slow starting control circuit and control method
  • Direct-current power supply hot plug slow starting control circuit and control method

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Embodiment 1

[0038] Such as image 3As shown, the DC power supply slow-start control circuit of the present invention includes a discrete element slow-start circuit, a power resistor circuit, and a MOS tube drain-source detection circuit. in:

[0039] The discrete component slow start circuit includes MOS tube M1, resistors R1, R2, capacitor C1, and voltage regulator diode VD1; wherein, R1, R2 form a voltage divider circuit, which is connected in series between the positive and negative input terminals of the power supply, and VD1 and C1 are connected in parallel Between the connection point of R1 and R2 and the negative input terminal of the power supply, the gate of the MOS transistor M1 is connected to the connection point of the resistors R1 and R2, and the source is connected to the negative input terminal of the power supply.

[0040] The power resistor circuit includes a resistor R3 connected between the source and the drain of the MOS transistor M1; it may also include multiple re...

Embodiment 2

[0047] Such as Figure 4 As shown, the DC power supply slow-start control circuit of the present invention includes a discrete element slow-start circuit, a power resistor circuit, and a MOS tube drain-source detection circuit.

[0048] The discrete component slow start circuit is made up of MOS tube M1, resistors R1, R2, capacitor C1, voltage regulator diode VD1; the power resistor circuit is made up of resistor R3; the MOS tube drain-source detection circuit is made up of resistors R4, R5 , R7, triode VT1, and capacitor C2. The resistors R4 and R5 are connected in series and R3 in parallel to form a voltage divider circuit. The base of the triode VT1 is connected to the connection point between R4 and R5, and the emitter is connected to the other end of R5. One end, the collector is connected to the resistor R7, and the other end of the resistor R7 is connected to the junction of R1 and R2.

[0049] In this embodiment, the DC power supply slow start control circuit further ...

Embodiment 3

[0056] Such as Figure 5 As shown, the DC power supply slow-start control circuit of the present invention includes a discrete element slow-start circuit, a power resistor circuit, and a MOS tube drain-source detection circuit.

[0057] The discrete component slow start circuit is made up of MOS tube M1, resistors R1, R2, capacitor C1, voltage regulator diode VD1; the power resistor circuit is made up of resistor R3; the MOS tube drain-source detection circuit is made up of resistors R4, R5 , R7, triode VT1, and capacitor C2, the resistors R4 and R5 are connected in series to form a voltage divider circuit, the triode VT1 and R5 are connected in parallel, the base is connected to the connection point between R4 and R5, and the emitter is connected to R5 another side.

[0058] In this embodiment, the DC power supply slow start control circuit further includes an enable control circuit.

[0059] One implementation of the enabling control circuit is as follows: the enabling con...

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Abstract

The invention provides a direct-current power supply hot plug slow starting control circuit, which comprises a discrete component slow starting circuit, power resistance circuits and a metal oxide semiconductor (MOS) tube drain-source electrode detecting circuit. The power resistance circuits are connected in parallel between MOS tube drain-source electrodes and a drain electrode of the discrete component slow starting circuit. The MOS tube drain-source electrode detecting circuit is connected with the power resistance circuits and the discrete component slow starting circuit and used for detecting voltage values of the power resistance circuits. When the voltage values are in a range of set values, MOS tubes of the power resistance circuits are connected. When the voltage values are beyond the range of set values, the MOS tubes of the power resistance circuits are disconnected. The invention further provides a control method for direct-current power supply hot plug slow starting. The direct-current power supply hot plug slow starting control circuit and the control method can effectively avoid MOS breakdown due to avalanche, simultaneously can effectively reduce voltage stress of the MOS tube drain-source electrodes and facilitates economic selection.

Description

technical field [0001] The invention relates to the technical field of power supply for electronic equipment, in particular to a control circuit and a control method for hot-swapping and slow-starting of a relatively high-power DC power supply on communication system equipment. Background technique [0002] With the development of communication electronic technology, customers have higher and higher requirements for the reliability of communication equipment. Once the communication network is interrupted, it will cause large-scale complaints and economic losses. Therefore, more and more communication equipment requires continuous power supply Under this condition, the faulty single board can be hot-swapped and replaced. When the board is hot-swapped, the capacitor at the DC power input port on the board is in a short-circuit state at the moment of power-on, which generates a large inrush current, causing ignition, oxidation or permanent damage to the connector, or causing sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36
Inventor 蒋思东钟名华常月娥胡海林
Owner ZTE CORP
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