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dc‑dc switching circuits and lamps with no-load protection

A no-load protection and switch-type technology, which is applied in the direction of emergency protection circuit devices, lamp circuit layout, electric light source, etc., can solve problems such as circuit and device damage, and achieve the prevention of excessive voltage, reliable no-load protection, and protection of circuits and The effect of the device

Active Publication Date: 2017-06-16
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose a DC-DC switch circuit and lamp with no-load protection, which can solve the problem of no-load accidents in the switch regulation circuit of the prior art. Problems that can cause damage to circuits and devices

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  • dc‑dc switching circuits and lamps with no-load protection

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Embodiment Construction

[0015] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] see figure 1 , the DC-DC switching circuit with no-load protection of the present invention includes: a switching regulator 1 , a feedback unit 2 , a comparison unit 3 and a control unit 4 .

[0017] The switching regulator 1 includes a power input terminal, a current output terminal and a control terminal. The power input terminal of the switching regulator is connected to a power supply, and the current output terminal of the switching regulator is connected to a load. Feedback unit 2, which is used for whether the switching regulator is connected to a load, which includes a first input terminal, a second input terminal and an output terminal, the input terminal of the feedback unit 2 is connected to the current output terminal of the switching regulator...

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Abstract

The invention provides a DC-DC switching type circuit with no-load protection, which comprises a switching regulator, a feedback unit, a comparing unit and a control unit, wherein the switching regulator is connected to a power supply and a load; the feedback unit is used for determining whether the switching regulator is connected to the load; a first input end of the comparing unit is connected to the current output end of the switching regulator, and a second input end of the comparing unit is connected to the output end of the feedback unit; the control unit is controlled by the comparing unit, the first input end of the control unit is connected to the output end of the comparing unit, the second input end of the control unit is connected to the current output end of the switching regulator, and the output end of the control unit is connected to the control end of the switching regulator, wherein when the feedback unit detects that the switching regulator is not connected to the load, the output end of the comparing unit has a no-load signal, and the control unit controls the switching regulator to stop working. The invention also provides a lamp. According to the DC-DC switching type circuit with no-load protection and the lamp, when the switching regulator is under the no-load condition, the circuit and components cannot be damaged.

Description

technical field [0001] The invention relates to a protection circuit, in particular to a DC-DC switching circuit with no-load protection and a lamp. Background technique [0002] Switching regulators have the advantages of high precision, adjustable output, and high conversion efficiency, and are widely used in the power supply industry. However, the switching regulator has a shortcoming, that is, the output terminal is not allowed to be no-loaded. When the output terminal is no-loaded, the output voltage will become higher and higher, which will endanger the device. Therefore, there is a need to prevent circuit and device damage when switching regulators are accidentally unloaded. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose a DC-DC switch circuit and lamp with no-load protection, which can solve the problem of no-load accidents in the switch re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/12H05B37/02
Inventor 周明杰林锦旭
Owner OCEANKING DONGGUAN LIGHTING TECH