DC power supply output control device
A DC power supply and output control technology, applied in circuit devices, logic circuit coupling devices, emergency protection circuit devices, etc., can solve the problems of unreliable and unsafe I/O power supply, and achieve high safety and reliability. Avoid the effect of damage
Active Publication Date: 2019-10-11
东莞市卓品电子科技有限公司
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Problems solved by technology
[0003]
In order to solve the problem of unreliable and unsafe I / O power supply existing in the prior art, the present invention provides a DC power supply output control device, which has the characteristics of limiting the current of the powered side, thereby making the power supply more secure and reliable.
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[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0026] refer to figure 1 As shown, the embodiment of the present invention provides a DC power output control device, including: I / O port control circuit 3, switch control circuit 4 and current limiting circuit 5;
[0027] The input end of the I / O port control circuit 3 is connected to the control end of the external device I / O port 2, and the output end of the I / O port control circuit 3 has two interfaces, a first interface and a second interface;
[0028] Wh...
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For the problem of unsafe power supply of the existing I / O port control power supply mode, the invention provides a DC power supply output control device, which comprises an I / O port control circuit,a switch control circuit and a current limiting circuit, the input end of the I / O port control circuit is connected with the I / O port control end of an external device, and the output end of the I / O port control circuit is provided with two interfaces; wherein the first interface is connected with a first input end of the switch control circuit, the second interface is connected with a grounding point, a second input end of the switch control circuit is connected with a direct-current power supply, an output end of the switch control circuit is connected with an input end of the current-limiting circuit, and an output end of the current-limiting circuit is connected with the power supply interface; and the current limiting circuit is used for limiting the current when the load connected with the power supply interface consumes too much current. The beneficial effects of the invention are that the circuit enables a circuit to be powered not to be overlarge in current, avoids the burningof elements and lines, and improves the safety and reliability of equipment.
Description
technical field [0001] The invention belongs to the technical field of switching circuits, and in particular relates to a DC power output control device. Background technique [0002] In the testing and production process of electronic products, in many cases, it is necessary to use the IO output port of the device to control the power supply to other DC devices or the product under test (such as: control the on and off of the alarm light, the The power supply of the input port of the product, etc.), the current practice is basically to use the IO output terminal to control the switch (such as: relay, transistor, etc.) connected between the power supply and the powered device to achieve power supply or stop power supply However, in this power supply mode, there are situations such as short circuit and wrong connection at the power supply end, which will cause excessive current, burn out the components or lines of the power supply end, and even cause a fire in severe cases. ...
Claims
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IPC IPC(8): H03K19/0175H02H9/02H02H3/06
CPCH03K19/017572H02H9/02H02H3/066
Inventor 彭武刘冬
Owner 东莞市卓品电子科技有限公司