CN211403177U

CN211403177U - Power supply control circuit and power adapter of network chip

Info

Publication number: CN211403177U
Application number: CN201922383454.2U
Authority: CN
Inventors: 王本欣; 邹青
Original assignee: Chenzhou Furuikang Electronic Co ltd
Current assignee: Chenzhou Furuikang Electronic Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-01
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a power supply control circuit and a power adapter of a network chip, the power supply control circuit of the network chip comprises a USB interface and an electronic switch circuit connected with the USB interface, when the USB interface is connected with a terminal, the electronic switch circuit is switched on, and the network chip is electrified to work; when the terminal on the USB interface is disconnected, the electronic switch circuit is disconnected, and the network chip is not operated when the power is cut off. Compared with the prior art, the utility model provides a network chip's power supply control circuit, when USB interface connection terminal, network chip can automatic power-on work, and when USB interface disconnection terminal, network chip can auto-power-off, easy operation, and convenient to use can also save the electric energy.

Description

Power supply control circuit and power adapter of network chip

Technical Field

The utility model relates to a power adapter technical field, more specifically say, relate to a power supply control circuit and power adapter of network chip.

Background

The power adapter is also called an external power supply, is a power supply voltage conversion device of small portable electronic equipment and electronic appliances, and has the working principle that alternating current input is converted into direct current output; according to the connection mode, the device can be divided into a wall-inserting type and a desktop type. It is commonly found in small electronic products such as mobile phones, liquid crystal displays and notebook computers.

With the continuous progress of electronic technology, a novel power adapter with a network interface comes along, the power adapter can directly connect a network cable to the network interface on the power adapter, and then is connected to terminal equipment through a USB interface of the power adapter, the network cable does not need to be directly connected to a terminal, and the power adapter is more convenient to use.

At present, for a power adapter with a network interface, after power failure or abnormal use, a network chip on the power adapter needs to be restarted by software or reset by manual operation to supply power again, so that normal work is recovered, the operation is complex, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power supply control circuit of network chip to solve the network chip that exists among the prior art after outage or abnormal use, the complicated and awkward problem of operation.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a power supply control circuit of a network chip comprises a USB interface and an electronic switch circuit connected with the USB interface, wherein when the USB interface is connected with a terminal, the electronic switch circuit is switched on, and the network chip is electrified to work; when the terminal on the USB interface is disconnected, the electronic switch circuit is disconnected, and the network chip is not operated when the power is cut off.

Pin 1 of the USB interface is connected with a positive pole VBUS of a power supply,

pins

2 and 3 of the USB interface are used for being in communication connection with a network chip,

when the USB interface is connected with a terminal, the 4 pins and the 5 pins of the USB interface are conducted to be low level, the electronic switch circuit is conducted, and the network chip is electrified to work.

The 5 feet of the USB interface are connected with the anodes of the voltage stabilizing diodes ZD8 and ZD6, and the cathodes of the voltage stabilizing diodes ZD8 and ZD6 are grounded.

The electronic switch circuit comprises an electronic switch IC2, and when the electronic switch IC2 is switched on, a network chip is electrified to work; when the electronic switch IC2 is off, the network chip is powered down and not operational.

The pin 2 of the electronic switch IC2 is grounded, the pin 4 of the electronic switch IC2 is connected with the pin 5 of the USB interface, and the pin 1 of the electronic switch IC2 is connected with the power supply anode VDDS of the network chip; when the pin 4 of the electronic switch IC2 is at low level, the pin 1 and the pin 5 of the electronic switch IC2 are conducted, and the power supply positive electrode VDDS has voltage output; when pin 4 of the electronic switch IC2 is high,

pins

1 and 5 of the electronic switch IC2 are non-conductive, and there is no voltage output from the supply positive terminal VDDS.

The pin 3 and the pin 5 of the electronic switch IC2 are connected in series through a resistor R27, the pin 1 and the pin 5 are connected in series through a resistor R25, the pin 5 is connected with the positive power supply electrode VBUS through a resistor R28, and the pin 4 of the electronic switch IC2 is connected with the positive power supply electrode VBUS through a resistor R21 and is grounded through a capacitor C24.

The positive pole of the power supply VBUS is connected with the positive poles of the voltage stabilizing diodes ZD5 and ZD7, and the negative poles of the voltage stabilizing diodes ZD5 and ZD7 are grounded.

Additionally, the utility model also provides a power adapter with network interface, including ac input end, EMI rectification filtering and surge absorption circuit, peak absorption circuit, PWM control circuit, IC supply circuit, transformer, network conversion and USB interface detection circuitry, USB interface, RJ45 connector, its characterized in that: the USB interface and the electronic switch circuit use the power supply control circuit of the network chip.

The USB interface is respectively connected with the transformer and the electronic switch circuit, and the network conversion and USB interface detection circuit is respectively connected with the transformer, the electronic switch circuit and the RJ45 connector.

The utility model has the advantages that:

compared with the prior art, the utility model provides a power supply control circuit of network chip on power adapter, when USB interface connection terminal, the network chip can automatic circular telegram work, and when USB interface disconnection terminal, the network chip can auto-power-off, easy operation, and convenient to use can also save the electric energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic circuit diagram of the power supply control circuit of the network chip of the present invention.

Fig. 2 is a schematic block diagram of the power adapter of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As shown in fig. 1, in an embodiment of the present invention, a power supply control circuit for a network chip is provided, which includes a USB interface and an electronic switch circuit connected to the USB interface, wherein when the USB interface is connected to a terminal, the electronic switch circuit is turned on, and the network chip is powered on to operate; when the terminal on the USB interface is disconnected, the electronic switch circuit is disconnected, and the network chip is not operated when the power is cut off.

Wherein, 1 pin of USB interface is connected with positive VBUS of power, 2, 3 pins of USB interface are used for being connected with network chip communication, 5 pins and 6 pins short circuit of USB interface, 6 pins of USB interface connect the USB shell, 4 pins of USB interface ground connection, when USB interface inserts (inserts) the terminal, 4 pins and 5 pins of USB interface switch on for the low level, and electronic switch circuit switches on, and network chip circular telegram is worked.

The electronic switching circuit includes, among other things, an electronic switching IC2 and some peripheral circuitry. When the electronic switch IC2 is switched on, the network chip is electrified to work; when electronic switch IC2 is open, the network chip is powered down and not operational.

Wherein, pin 2 of the electronic switch IC2 is grounded, pin 4 (EN) of the electronic switch IC2 is connected with pin 5 of the USB interface, pin 1 of the electronic switch IC2 is connected with the power supply anode VDDS of the network chip; when the pin 4 of the electronic switch IC2 is at low level, the pin 1 and the pin 5 of the electronic switch IC2 are conducted, the positive pole VDDS of the power supply has voltage output, and at the moment, the network chip is electrified to work; when pin 4 of the electronic switch IC2 is at high level, pin 1 and pin 5 of the electronic switch IC2 are not conducted, and no voltage is output from the power supply positive electrode VDDS, at this time, the network chip is powered off and does not work.

Specifically, the pin 4 of the electronic switch IC2 is connected to the shell of the USB interface as the negative pole of the power supply of the electronic switch IC2, and the pin 5 of the electronic switch IC2 is connected to the positive pole VBUS of the power supply as the positive pole of the power supply of the electronic switch IC 2.

Specifically, when the USB interface is connected to the terminal (the USB interface is inserted through the connector on the connection line), the

pins

4 and 5 of the USB interface are turned on to a low level, so that the pin 4 (EN) of the electronic switch IC2 is a low level, the

pins

1 and 5 of the electronic switch IC2 are turned on, the pin 1 (VDDS) of the electronic switch IC2 has a voltage output to power the network chip, and the network chip is powered on to operate.

When the terminal on the USB interface is disconnected (the connector is pulled out), the

pins

4 and 5 of the USB interface are not conducted to high level, so that the pin 4 (EN) of the electronic switch IC2 is high level, the

pins

1 and 5 of the electronic switch IC2 are not conducted, the pin 1 (VDDS) of the electronic switch IC2 does not have voltage output to supply power to the network chip, the electronic switch IC2 is disconnected, and the network chip does not work and is powered off.

The positive pole VBUS of the power supply is connected with the positive poles of the voltage stabilizing diodes ZD5 and ZD7, and the negative poles of the voltage stabilizing diodes ZD5 and ZD7 are grounded.

As shown in fig. 2, in addition, the utility model discloses still provide a power adapter with network interface, filter and surge absorption circuit, PWM control circuit, IC supply circuit, transformer, network conversion and USB interface detection circuitry, USB interface, RJ45 connector including alternating current input end, EMI rectification, still include electronic switch circuit, and USB interface and electronic switch circuit use foretell network chip's power supply control circuit.

In addition, the EMI rectifying and filtering and surge absorbing circuit is respectively connected with the AC input end, the transformer and the absorbing circuit, and the PWM control circuit is respectively connected with the absorbing circuit, the transformer and the IC power supply circuit. The transformer is also connected with the IC power supply circuit.

The main principle of the power adapter is as follows:

1. the alternating current input end is an alternating current input interface of the product and provides a power supply for the whole product, and the circuit comprises high-level lightning stroke protection, over-temperature/over-current protection and over-surge protection;

2. an EMI rectification filter and surge absorption circuit is a power supply rectification filter part and a surge absorption circuit of a product, parts are selected to meet the use requirements of all over the world, the rated range of 85-300V, a capacitor is selected from a capacitor with long service life, high voltage resistance and low water content, and a rectifier bridge is selected from a high voltage resistance/high surge device;

3. the absorption circuit is a peak absorption part of the product, ensures the stress of the PWM switch, and can prevent abnormal sounds of the product in various states by adopting a high-quality ceramic capacitor;

4. the PWM control circuit is a PWM control and switch circuit part of a product, adopts a built-in high-voltage-resistant switch MOS tube, comprises various protection circuits such as over-temperature, over-current and over-voltage, monitoring the working state of the product, controlling the stability of a loop and saving a main chip scheme of peripheral elements;

5. the IC power supply circuit is a VCC power supply part of the PWM switching circuit, the VCC power supply part comprises current limiting/rectifying/filtering, and the main IC has a wider working voltage range, so that peripheral devices are simple and convenient to select;

6. the transformer is a main transformer of a product, adopts a one-time simple winding method, is suitable for an automatic production process, and has extremely high cost performance;

7. the network conversion and USB interface detection circuit adopts a top-grade original factory scheme in the world, is stable in performance and high in protection level, facilitates process control in the production process, does not need complex peripheral elements, can realize functions required by a customer, and provides stable network signals for a terminal; the network chip is arranged on the part of the circuit.

8. The electronic switch circuit realizes the power-off and power supply of the network chip in the product again in the plugging process by reusing the pin function of the USB interface, and the connection is completed by the joint cooperation of the USB interface structure and the electronic switch IC 2;

9. the USB interface is used for providing power supply and signal output interface parts for products, has a larger effect, and is not only used for providing power supply and network signals for terminal equipment, but also required to realize the programming of the products;

10. the RJ45 connector is a network signal input interface part of a product, and the part is also the core of the product and is used for providing network signals required by a network chip and also providing lightning stroke electrostatic protection of the interface;

11. the terminal device connected in fig. 2 is a terminal device capable of being used with a power adapter.

The above embodiments and drawings are only for illustrating the technical solutions of the present invention and do not constitute limitations of the present invention. It should be noted that, a person skilled in the art may modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for part or all of the technical features, and such modifications or substitutions are included in the scope of the present invention as claimed in the claims.

Claims

1. A power supply control circuit of a network chip is characterized in that: the USB interface switching circuit comprises a USB interface and an electronic switching circuit connected with the USB interface, wherein when the USB interface is connected to a terminal, the electronic switching circuit is switched on, and a network chip is electrified to work; when the terminal on the USB interface is disconnected, the electronic switch circuit is disconnected, and the network chip is not operated when the power is cut off.

2. The power supply control circuit of the network chip according to claim 1, wherein: the USB interface comprises a power supply anode VBUS connected with a pin 1, a pin 2 and a pin 3 of the USB interface are used for being in communication connection with a network chip, a pin 5 and a pin 6 of the USB interface are in short circuit, a pin 6 of the USB interface is connected with a USB shell, a pin 4 of the USB interface is grounded, when the USB interface is accessed to a terminal, the pin 4 and the pin 5 of the USB interface are conducted to be low level, an electronic switch circuit is conducted, and the network chip is electrified to work.

3. The power supply control circuit of the network chip according to claim 2, wherein: the 5 feet of the USB interface are connected with the anodes of the voltage stabilizing diodes ZD8 and ZD6, and the cathodes of the voltage stabilizing diodes ZD8 and ZD6 are grounded.

4. The power supply control circuit of the network chip according to claim 1, wherein: the electronic switch circuit comprises an electronic switch IC2, and when the electronic switch IC2 is switched on, a network chip is electrified to work; when the electronic switch IC2 is off, the network chip is powered down and not operational.

5. The power supply control circuit of the network chip according to claim 4, wherein: the pin 2 of the electronic switch IC2 is grounded, the pin 4 of the electronic switch IC2 is connected with the pin 5 of the USB interface, and the pin 1 of the electronic switch IC2 is connected with the power supply anode VDDS of the network chip; when the pin 4 of the electronic switch IC2 is at low level, the pin 1 and the pin 5 of the electronic switch IC2 are conducted, and the power supply positive electrode VDDS has voltage output; when pin 4 of the electronic switch IC2 is high, pins 1 and 5 of the electronic switch IC2 are non-conductive, and there is no voltage output from the supply positive terminal VDDS.

6. The power supply control circuit of the network chip according to claim 5, wherein: the pin 3 and the pin 5 of the electronic switch IC2 are connected in series through a resistor R27, the pin 1 and the pin 5 are connected in series through a resistor R25, the pin 5 is connected with the positive power supply electrode VBUS through a resistor R28, and the pin 4 of the electronic switch IC2 is connected with the positive power supply electrode VBUS through a resistor R21 and is grounded through a capacitor C24.

7. The power supply control circuit of the network chip according to claim 6, wherein: the positive pole of the power supply VBUS is connected with the positive poles of the voltage stabilizing diodes ZD5 and ZD7, and the negative poles of the voltage stabilizing diodes ZD5 and ZD7 are grounded.

8. The utility model provides a power adapter with network interface, includes AC input end, EMI rectification filtering and surge absorption circuit, peak absorption circuit, PWM control circuit, IC supply circuit, transformer, network conversion and USB interface detection circuitry, USB interface, RJ45 connector, its characterized in that: further comprising an electronic switching circuit, said USB interface and electronic switching circuit using the power supply control circuit of the network chip of any of claims 1-7.

9. The power adapter as claimed in claim 8, wherein: the USB interface is respectively connected with the transformer and the electronic switch circuit, and the network conversion and USB interface detection circuit is respectively connected with the transformer, the electronic switch circuit and the RJ45 connector.