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A power circuit and electronic product

A power circuit and circuit technology, applied in electrical components, output power conversion devices, DC power input conversion to DC power output, etc., can solve the shutdown of electronic products, reduce the working stability of electronic products, and disconnect the power supply lines of electronic products. and other problems to achieve the effect of improving stability

Active Publication Date: 2017-05-31
QINGDAO GOERTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, when electronic products are in normal operation, if the power supply fluctuates slightly, the power supply line of electronic products may be disconnected, causing the electronic products to shut down, thereby reducing the working stability of electronic products and affecting the normal use of electronic products.

Method used

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  • A power circuit and electronic product
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  • A power circuit and electronic product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1. The power supply circuit of this embodiment mainly includes a power input terminal PIN, a power supply output terminal POUT, a power supply switch circuit, a power-on detection circuit, and an undervoltage protection circuit. See figure 1 As shown, the power supply switching circuit is mainly composed of the first switching tube Q1 and the second switching tube Q2, the power input terminal PIN is connected to one end of the switching path of the first switching tube Q1, and the other end of the switching path of the first switching tube Q1 is connected to the power supply output end POUT, the control terminal of the first switching tube Q1 is connected to one end of the switching path of the second switching tube Q2 through the current limiting resistor R12, the other end of the switching path of the second switching tube Q2 is grounded, and one end of the switching path of the first switching tube Q1 is biased Resistor R1 is connected to the control termin...

Embodiment 2

[0047] Embodiment 2. The power supply circuit of this embodiment mainly includes a power input terminal PIN, a power supply output terminal POUT, a power supply switch circuit, a power-on detection circuit, and an undervoltage protection circuit. See figure 2As shown, the power supply switching circuit is mainly composed of the first switching tube Q1 and the second switching tube Q2, the power input terminal PIN is connected to one end of the switching path of the first switching tube Q1, and the other end of the switching path of the first switching tube Q1 is connected to the power supply output end POUT, the control end of the first switching tube Q1 is connected to one end of the switching path of the second switching tube Q2, the other end of the switching path of the second switching tube Q2 is grounded, and one end of the switching path of the first switching tube Q1 is connected to the first switching path through the bias resistor R1. The control terminal of the swit...

Embodiment 3

[0080] Embodiment 3. The difference between the power supply circuit of this embodiment and Embodiment 2 is that the power supply input terminal PIN is respectively connected to the second voltage divider circuit, the third voltage divider circuit, and the fourth voltage divider circuit through the capacitor C1, see image 3 shown.

[0081] Specifically, the power input terminal PIN is connected to one end of the voltage dividing resistor R8 through the capacitor C1, the power input terminal PIN is connected to one end of the voltage dividing resistor R10 through the capacitor C1, the power input terminal PIN is connected to one end of the voltage dividing resistor R6 through the capacitor C1, and the other The circuit structure is the same as that of the second embodiment, for details, please refer to the second embodiment, and will not be repeated here.

[0082] At the moment when the PIN of the power input terminal is powered on, the capacitor C1 is equivalent to a path. Ac...

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PUM

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Abstract

The invention discloses a power supply circuit, which comprises a power supply input end, a power supply output end, an electrifying detection circuit and an under-voltage protection circuit; the power supply input end is connected to one end of a first switching tube passage; the other end of the first switching tube passage is connected to the power supply output end; the control end of a first switching tube is connected to one end of a second switching tube passage; the other end of the second switching tube passage is grounded; a bias resistor is connected between one end of the first switching tube passage and the control end of the first switching tube passage; the control end of the second switching tube is connected to the other end of the first switching tube passage; the power supply input end is connected with the electrifying detection circuit; and the electrifying detection circuit outputs switch signals to the control end of the second switching tube. The power supply circuit disclosed by the invention is kept conductive within an allowable voltage range, so that the stability of the power supply circuit is improved, and therefore, the stability of an electricity load is improved; the power supply circuit is applied in an electronic product, and thus, the operation stability of the electronic product is improved.

Description

technical field [0001] The invention belongs to the technical field of power supply circuits, and in particular relates to a power supply circuit and electronic products designed using the power supply circuit. Background technique [0002] At present, when the electronic product is running normally, if the power supply fluctuates slightly, the power supply line of the electronic product may be disconnected, causing the electronic product to shut down, thereby reducing the working stability of the electronic product and affecting the normal use of the electronic product. Contents of the invention [0003] The invention provides a power supply circuit, which improves the stability of the power supply circuit. [0004] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve: [0005] A power supply circuit, including a power supply input terminal and a power supply output terminal, and also includes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
CPCH02M3/158
Inventor 李卫国
Owner QINGDAO GOERTEK