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An asymmetrical time-adjustable soft-start and soft-off power switch circuit

A power switch, asymmetric technology, applied in the field of switching power supply, can solve problems such as hidden dangers of component safety equipment reliability, load terminal voltage impact, etc., achieve the effect of reducing protective design measures, reducing electromagnetic interference peak value, and improving safety life

Active Publication Date: 2018-08-07
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned fast turn-on and fast turn-off power switch circuit not only forms a huge inrush current inside the power switch circuit, but also easily forms an excessive voltage shock at the load end.
These unfavorable factors often bring great hidden dangers to PCB design, component safety and equipment reliability.

Method used

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  • An asymmetrical time-adjustable soft-start and soft-off power switch circuit

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] An asymmetric time-adjustable soft-start and soft-off power switch circuit, such as figure 1 As shown, it includes an input power processing circuit 1 , a voltage stabilizing circuit 2 , an asymmetric time-adjustable integration circuit 3 , a pulse width modulation circuit 4 and a power tube switch control circuit 5 connected in sequence.

[0031] The input power processing circuit includes a transient suppression diode Z2, a filter capacitor E2, a capacitor C2 and an anti-reverse connection diode D1, and a transient suppression diode Z2 and a filter are connected in parallel between the positive pole of the power supply processed by the anti-reverse connection diode D1 and the ne...

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Abstract

The invention provides an asymmetric time-adjustable soft-start and soft-off power switch circuit, which includes an input power processing circuit, a voltage stabilizing circuit, an asymmetric time-adjustable integration circuit, a pulse width modulation circuit and Power tube switch control circuit. Compared with the prior art, the present invention has the following advantages: satisfying intelligent control, by adjusting the parameters of circuit components, the function of "power on and off time can be adjusted" can be realized; Or fast) intelligent equipment or instruments that shut down the power supply.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, in particular to an asymmetrical time-adjustable soft-start and soft-off power switch circuit. Background technique [0002] The existing power switch circuit mainly realizes the following functions: [0003] (1) When the power switch is closed, the power circuit starts quickly, and at the output end of the power circuit, the voltage rises from 0 volts to the rated voltage within a short period of time. [0004] (2) When the power switch is turned off, the power circuit is quickly shut down, and the voltage at the output end of the power circuit drops from the rated voltage to 0 volts in a short period of time. [0005] The above-mentioned fast turn-on and turn-off power switch circuit not only forms a huge inrush current inside the power switch circuit, but also easily forms an excessive voltage shock at its load end. These unfavorable factors often bring great hidden dangers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/94
Inventor 杨俊恩褚全红李向荣范燕朝刘涛盛定国曹春芳龚思扬姚素娟
Owner CHINA NORTH ENGINE INST TIANJIN