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High-reliability trigger circuit

A trigger circuit and reliability technology, applied in the direction of circuits, electrical components, electronic switches, etc., can solve the problems of controller output confusion, circuit damage, etc., and achieve the effect of ensuring safety and high reliability

Pending Publication Date: 2020-12-25
ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in abnormal situations or when the controller fails, the controller may output high or low levels for a long time, causing confusion in the output of the controller, so that the switching circuit is in a long-term on or off state, which will lead to subsequent circuit failures. In case of damage

Method used

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Examples

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Embodiment

[0015] Embodiment: a kind of trigger circuit of high reliability, such as figure 2 As shown, it includes a controller, a protection circuit and a switch circuit, wherein the protection circuit is arranged between the controller and the switch circuit, that is, one end of the protection circuit is connected to the output end of the controller, and the other end is connected to the input end of the switch circuit. The controller of this embodiment includes a control chip U1, which outputs a PWM signal during normal operation, and the PWM signal contains a DC component and an AC component, such as image 3 shown.

[0016] In this embodiment, the protection circuit includes a first capacitor C1, a second capacitor C2, a first diode D1 and a second diode D2. Specifically, the output pin of the control chip U1 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is respectively connected to the anode of the first diode D1 and the cathode o...

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PUM

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Abstract

The invention relates to the technical field of trigger circuits, and particularly discloses a high-reliability trigger circuit. The circuit comprises a controller, a switching circuit and a protection circuit, wherein the controller outputs PWM signals during normal work. The trigger circuit also comprises a protection circuit, and the protection circuit is installed between the controller and the switching circuit. According to the invention, when the controller is abnormal or fails, the protection circuit ensures that the switching circuit does not work, so that the safety of subsequent circuits is ensured.

Description

technical field [0001] The invention relates to the technical field of trigger circuits, in particular to a highly reliable trigger circuit. Background technique [0002] The existing trigger circuit usually includes a controller and a switch circuit, and its circuit diagram is as follows figure 1 As shown, in normal operation, the controller outputs a high level to turn on the switch circuit, so that the follow-up circuit can work normally; when not working, the controller outputs a low level to turn off the switch circuit, so that the follow-up circuit stops working. However, in abnormal situations or when the controller fails, the controller may output high or low levels for a long time, causing confusion in the output of the controller, so that the switching circuit is in a long-term on or off state, which will lead to subsequent circuit failures. In case of damage. Contents of the invention [0003] The purpose of the present invention is to provide a highly reliabl...

Claims

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Application Information

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IPC IPC(8): H03K17/567H03K17/081
CPCH03K17/08112H03K17/567
Inventor 吕景飞余彬钟玲祥李阳
Owner ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD