CN221010155U

CN221010155U - MIFI portable router

Info

Publication number: CN221010155U
Application number: CN202322849067.XU
Authority: CN
Inventors: 苏创伟; 赵建义; 赵建宾
Original assignee: Shenzhen Guanglian Zhitong Technology Co ltd
Current assignee: Shenzhen Guanglian Zhitong Technology Co ltd
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-05-24
Anticipated expiration: 2033-10-23

Abstract

The utility model discloses an MIFI portable router with an overvoltage protection function and an intelligent switch management function, which comprises a power input end, an overvoltage protection circuit, a battery, a singlechip, a power module and a WiFi module, wherein the power input end is connected with the power input end; the power input end is used for being connected with an external power supply; the power module is used for converting the voltage of an external power supply or a battery into the voltage required by the work of the singlechip and the WiFi module; the overvoltage protection circuit is connected between the power input end and the power module and is used for disconnecting a circuit channel between the power input end and the power module when the voltage of the external power supply is greater than an overvoltage protection threshold value; the WiFi module starts/closes the WiFi function according to the received remote switch control instruction and forwards the remote switch control instruction to the singlechip; the singlechip is used for controlling the overvoltage protection circuit to connect/disconnect a circuit channel between the power input end and the power module according to the remote switch control instruction.

Description

MIFI portable router

Technical Field

The utility model relates to the technical field of electronic equipment, in particular to an MIFI portable router.

Background

The existing MIFI portable router has the characteristics of small size, flexibility and strong mobility, and due to the characteristics, the portable router can be supplied with power by a large number of devices, not only can the portable router be supplied with power by the device with the socket, but also the portable router can be supplied with power by the device with the USB interface, such as a charger with a decoy IC conversion head, a USB port on a vehicle and the like. However, the voltage that individual users use to decoy the IC switch head far exceeds the device normal operating voltage; the vehicle-mounted USB is powered, the voltage fluctuation of a storage battery on the vehicle is larger, and the situation that the instantaneous voltage exceeds the voltage range of the portable router during normal operation exists. The existing MIFI portable router does not perform good protection when facing a complex power supply environment, so that damage to components in the machine is easy to occur, the safety performance is poor, and the service life is short.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the MIFI portable router with the overvoltage protection function and the intelligent switch management function.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The MIFI portable router comprises a power input end, an overvoltage protection circuit, a battery, a singlechip, a power module and a WiFi module; the power input end is used for being connected with an external power supply; the power supply module is used for converting the voltage of an external power supply or a battery into the voltage required by the work of the singlechip and the WiFi module; the overvoltage protection circuit is connected between the power input end and the power module and is used for disconnecting a circuit channel between the power input end and the power module when the voltage of an external power supply is greater than an overvoltage protection threshold value; the WiFi module starts/closes the WiFi function according to the received remote switch control instruction and forwards the remote switch control instruction to the singlechip; the singlechip is used for controlling the overvoltage protection circuit to be connected/disconnected with a circuit channel between the power input end and the power module according to a remote switch control instruction.

Preferably, the overvoltage protection circuit comprises an OVP chip U21, a voltage dividing resistor R1, a voltage dividing resistor R2, a resistor R563 and a capacitor C894, wherein an input pin of the OVP chip U21 and a power pin of the OVP chip U21 are simultaneously connected with the power input end and grounded through the capacitor C894, an enabling pin of the OVP chip U21 is connected with the singlechip, the resistor R563 is connected between the power pin of the OVP chip U21 and the enabling pin of the OVP chip U21, the power pin of the OVP chip U21 is grounded after passing through the voltage dividing resistor R1 and the voltage dividing resistor R2 in sequence, a junction point of the voltage dividing resistor R1 and the voltage dividing resistor R2 is connected with a feedback pin of the OVP chip U21, and an output pin of the OVP chip U21 is connected with the power module.

Preferably, a capacitor C9503, a capacitor C9509, a capacitor C809 and a capacitor C810 are connected in parallel between the output pin of the OVP chip U21 and ground.

Preferably, the power module comprises a power management circuit, a voltage boosting circuit, a voltage stabilizing circuit and a voltage reducing circuit; when an external power supply is input to the power supply management circuit, the power supply management circuit is used for outputting an external power supply voltage to the voltage boosting circuit and the voltage stabilizing circuit and charging a battery; when no external power is input to the power management circuit, the power management circuit is used for outputting the battery voltage to the voltage boosting circuit and the voltage stabilizing circuit; the voltage boosting circuit is used for boosting the voltage output by the power management circuit and outputting 5V voltage; the voltage stabilizing circuit is used for stabilizing the voltage output by the power management circuit and outputting stable 2.8 voltage to supply power to the singlechip; the step-down circuit is used for carrying out step-down processing on the 5V voltage output by the step-up circuit and then outputting 3.3 voltage to supply power to the WiFi module.

Preferably, the power management circuit comprises a power management chip U92 with a model SY6970, a BUS pin of the power management chip U92 is connected with the output end of the overvoltage protection circuit, a BAT pin of the power management chip U92 is connected with a battery, and an LX pin of the power management chip U92 is respectively connected with the input end of the voltage boosting circuit and the input end of the voltage stabilizing circuit through an inductor L132.

Preferably, the boost circuit includes a boost chip U90 with a model SY7120, the LX pin of the boost chip U90 is connected to the output end of the power management circuit through an inductor L131, and the OUT pin of the boost chip U90 is connected to the input end of the buck circuit.

Preferably, the voltage stabilizing circuit comprises an LDO voltage stabilizing chip U60 with the model of AF6212, the VIN pin of the LDO voltage stabilizing chip U60 is connected with the output end of the power management circuit through a resistor 1508, and the OUT pin of the LDO voltage stabilizing chip U60 is connected with the singlechip.

Preferably, the step-down circuit includes a step-down chip U97 with a model SY8120, an IN pin of the step-down chip U97 is connected with the output end of the step-up circuit, and an LX pin of the step-down chip U97 is connected with the WiFi module through an inductor L125.

Preferably, the power input end is provided with a Type-C interface or a USB interface.

Preferably, the singlechip is a singlechip with the model of N76E003_QFN20.

The beneficial technical effects of the utility model are as follows: the power input end of the MIFI portable router is provided with the overvoltage protection circuit, and when the external power voltage exceeds the set overvoltage protection threshold value, the input of the external power is disconnected, so that the MIFI portable router is ensured not to burn out components in the machine due to the external instantaneous high voltage, the whole machine is protected, the MIFI portable router is safer to use, and the service life is longer; in addition, the user can send a remote switch control instruction to the router through the terminal equipment, intelligent switch management is carried out on the router, manual operation on the equipment is not needed, and user experience is greatly improved.

Drawings

FIG. 1 is a block diagram of the circuit architecture of a MIFI portable router of the present utility model;

FIG. 2 is a schematic circuit diagram of an overvoltage protection circuit according to the present utility model;

FIG. 3 is a schematic diagram of a single chip microcomputer and peripheral circuits thereof according to the present utility model;

FIG. 4 is a schematic circuit diagram of a power management circuit according to the present utility model;

FIG. 5 is a schematic circuit diagram of a boost circuit of the present utility model;

FIG. 6 is a schematic circuit diagram of a voltage regulator circuit of the present utility model;

fig. 7 is a schematic circuit diagram of the step-down circuit of the present utility model.

Detailed Description

The present utility model will be further described with reference to the drawings and examples below in order to more clearly understand the objects, technical solutions and advantages of the present utility model to those skilled in the art.

The utility model provides a MIFI portable router.

As shown in fig. 1, in one embodiment of the present utility model, the MIFI portable router includes a power input terminal 10, an overvoltage protection circuit 20, a battery 30, a singlechip 40, a power module 50 and a WiFi module 60; the power input end 10 is used for being connected with an external power supply; the power module 50 is configured to convert the voltage of the external power source or the battery 30 into the voltage required by the operation of the singlechip 40 and the WiFi module 60; the overvoltage protection circuit 20 is connected between the power input terminal 10 and the power module 50, and is used for disconnecting a circuit channel between the power input terminal 10 and the power module 50 when the voltage of an external power supply is greater than an overvoltage protection threshold value; the WiFi module 60 turns on/off the WiFi function according to the received remote switch control command, and forwards the remote switch control command to the singlechip 40; the singlechip 40 is used for controlling the overvoltage protection circuit 20 to connect/disconnect the circuit channel between the power input terminal 10 and the power module 50 according to a remote switch control instruction.

In this embodiment, the power input terminal 10 is provided with a Type-C interface, and is connected with an external power supply through the Type-C interface; in other embodiments, the power input 10 may be connected to an external power source using other types of interfaces, such as a USB interface.

As shown IN fig. 2, the overvoltage protection circuit 20 IN this embodiment includes an OVP chip U21, a voltage dividing resistor R1, a voltage dividing resistor R2, a resistor R563, and a capacitor C894, where an input pin (IN pin) of the OVP chip U21 and a power pin (VCC pin) of the OVP chip U21 are simultaneously connected to the power input terminal 10 and grounded through the capacitor C894, an enable pin (EN pin) of the OVP chip U21 is connected to the singlechip 40, the resistor R563 is connected between the power pin of the OVP chip U21 and the enable pin of the OVP chip U21, the power pin of the OVP chip U21 is grounded after passing through the voltage dividing resistor R1 and the voltage dividing resistor R2 IN sequence, a junction point of the voltage dividing resistor R1 and the voltage dividing resistor R2 is connected to a feedback pin (FB pin) of the OVP chip U21, and an output pin (OUT pin) of the OVP chip U21 is connected to the power module 50. In some preferred embodiments of the present utility model, a capacitor C9503, a capacitor C9509, a capacitor C809 and a capacitor C810 are connected in parallel between the output pin of the OVP chip U21 and ground.

Fig. 3 is a schematic diagram of a single-chip microcomputer and a peripheral circuit thereof according to the present utility model, as shown in fig. 3, U104 is a single-chip microcomputer of n7e003_qfn 20, i.e. the single-chip microcomputer 40 in the present embodiment adopts a single-chip microcomputer of the model n7e003_qfn 20; in other embodiments, the single-chip microcomputer 40 may also be a single-chip microcomputer of other types, such as N76E885AT20.

When the MIFI portable router in this embodiment works normally, after the external power enters through the Type-C interface (TYPEC _vbus end) of the power input end 10, the voltage of the external power passes through the overvoltage protection circuit 20, and is divided by the voltage dividing resistor R1 and the voltage dividing resistor R2 and then is input to the feedback pin (FB pin) of the OVP chip U21, so as to obtain the real-time voltage of the external power; secondly, the OVP chip U21 compares the real-time voltage of the external power supply with an overvoltage protection threshold, and when the real-time voltage of the external power supply is smaller than the overvoltage protection threshold, the external power supply can smoothly supply power to a back-end device (for example, a WiFi module) through the overvoltage protection circuit 20; when the real-time voltage of the external power supply is larger than the overvoltage protection threshold, the output of the OVP chip U21 is closed, so that a connecting channel between the external power supply and a rear-end device is disconnected, and further the rear-stage device is protected from being burnt. And when the input external power supply voltage is smaller than the overvoltage protection threshold value, the external power supply can automatically resume power supply to the devices at the later stage. The overvoltage protection threshold may be set according to a normal operating voltage range of the router, a withstand voltage value of an internal component of the router, and the like, and stored in the OVP chip U21.

When the MIFI portable router in the embodiment works normally, a user can send a remote switch control instruction to the router through the APP and the Web page, so that intelligent switch management of the router is realized. When a user issues an instruction, the WiFi module starts/closes the WiFi function according to the received remote switch control instruction, so that the on-off management of the router is realized. For example, when the router is placed in a home to surf the internet for children, the router can be started and shut down at regular time so as to control the surfing time period of the children, and the router can be restarted at regular time so as to enable the machine to run more smoothly. Meanwhile, the WiFi module receives the remote switch control instruction and forwards the remote switch control instruction to the singlechip, and the singlechip controls the overvoltage protection circuit to connect/disconnect a circuit channel between the power input end and the power module according to the remote switch control instruction.

In summary, the power input end of the MIFI portable router in the embodiment is provided with the overvoltage protection circuit, and when the external power voltage exceeds the set overvoltage protection threshold value, the input of the external power is disconnected, so that the MIFI portable router is ensured not to burn out components in the machine due to the instantaneous high voltage outside, thereby protecting the whole machine, ensuring safer use of the MIFI portable router and longer service life; in addition, the user can send a remote switch control instruction to the router through the terminal equipment, intelligent switch management is carried out on the router, manual operation on the equipment is not needed, and user experience is greatly improved.

Referring again to fig. 1, in a preferred embodiment of the present utility model, the power module 50 includes a power management circuit 51, a voltage boosting circuit 52, a voltage stabilizing circuit 53, and a voltage reducing circuit 54; when an external power is input to the power management circuit 51, the power management circuit 51 is configured to output an external power voltage to the voltage boosting circuit 52 and the voltage stabilizing circuit 53, and charge the battery 30; when no external power is input to the power management circuit 51, the power management circuit 51 is configured to output the voltage of the battery 30 to the voltage boosting circuit 52 and the voltage stabilizing circuit 53; the booster circuit 52 is configured to boost the voltage output from the power management circuit 51 and output a 5V voltage; the voltage stabilizing circuit 53 is configured to perform voltage stabilizing processing on the voltage output by the power management circuit 51, and then output a stable 2.8 voltage to supply power to the singlechip 40; the step-down circuit 54 is configured to step down the 5V voltage output by the step-up circuit 52, and then output a 3.3 voltage to power the WiFi module 60.

As shown in fig. 4, the power management circuit 51 includes a power management chip U92 with a model SY6970, a BUS pin (1 pin) of the power management chip U92 is connected to the output end (VBUS end) of the overvoltage protection circuit 20, BAT pins (13, 14 pins) of the power management chip U92 are connected to the battery 30, and LX pins (19, 20 pins) of the power management chip U92 are connected to the input end of the boost circuit 52 and the input end of the voltage stabilizing circuit 53 through an inductor L132, respectively.

As shown in fig. 5, the boost circuit 52 includes a boost chip U90 with a model SY7120, LX pins (6, 19, 20 pins) of the boost chip U90 are connected to an output terminal (VSYS terminal) of the power management circuit 51 through an inductor L131, and OUT pins (2, 3, 4, 5 pins) of the boost chip U90 are connected to an input terminal of the buck circuit 54, and transmit a 5V voltage (VDD 5V) to the buck circuit 54.

As shown in fig. 6, the voltage stabilizing circuit 53 includes an LDO voltage stabilizing chip U60 with a model AF6212, a VIN pin (1 pin) of the LDO voltage stabilizing chip U60 is connected to an output end (VSYS end) of the power management circuit 51 through a resistor 1508, an OUT pin (5 pin) of the LDO voltage stabilizing chip U60 is connected to the singlechip 40 and the power management chip U92, and a stable 2.8 voltage (vcc_mcu) is output to supply power to the singlechip 40 and the power management chip U92.

As shown IN fig. 7, the voltage-reducing circuit 54 includes a voltage-reducing chip U97 with a model SY8120, the pin IN (pin 5) of the voltage-reducing chip U97 is connected to the output end (VDD 5V end) of the voltage-increasing circuit 52, the pin LX (pin 6) of the voltage-reducing chip U97 is connected to the WiFi module 60 through an inductor L125, and outputs 3.3 voltage to supply power to the WiFi module 60.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims shall fall within the scope of the present utility model.

Claims

1. A MIFI portable router, characterized by: the MIFI portable router comprises a power input end, an overvoltage protection circuit, a battery, a singlechip, a power module and a WiFi module; the power input end is used for being connected with an external power supply; the power supply module is used for converting the voltage of an external power supply or a battery into the voltage required by the work of the singlechip and the WiFi module; the overvoltage protection circuit is connected between the power input end and the power module and is used for disconnecting a circuit channel between the power input end and the power module when the voltage of an external power supply is greater than an overvoltage protection threshold value; the WiFi module starts/closes the WiFi function according to the received remote switch control instruction and forwards the remote switch control instruction to the singlechip; the singlechip is used for controlling the overvoltage protection circuit to be connected/disconnected with a circuit channel between the power input end and the power module according to a remote switch control instruction.

2. The MIFI portable router of claim 1, wherein: the overvoltage protection circuit comprises an OVP chip U21, a voltage dividing resistor R1, a voltage dividing resistor R2, a resistor R563 and a capacitor C894, wherein an input pin of the OVP chip U21 and a power pin of the OVP chip U21 are simultaneously connected with the power input end and grounded through the capacitor C894, an enabling pin of the OVP chip U21 is connected with the singlechip, the resistor R563 is connected between the power pin of the OVP chip U21 and the enabling pin of the OVP chip U21, the power pin of the OVP chip U21 is grounded after passing through the voltage dividing resistor R1 and the voltage dividing resistor R2 in sequence, a junction of the voltage dividing resistor R1 and the voltage dividing resistor R2 is connected with a feedback pin of the OVP chip U21, and an output pin of the OVP chip U21 is connected with the power module.

3. The MIFI portable router of claim 2, wherein: a capacitor C9503, a capacitor C9509, a capacitor C809 and a capacitor C810 are connected in parallel between the output pin of the OVP chip U21 and the ground.

4. The MIFI portable router of claim 1, wherein: the power module comprises a power management circuit, a voltage boosting circuit, a voltage stabilizing circuit and a voltage reducing circuit; when an external power supply is input to the power supply management circuit, the power supply management circuit is used for outputting an external power supply voltage to the voltage boosting circuit and the voltage stabilizing circuit and charging a battery; when no external power is input to the power management circuit, the power management circuit is used for outputting the battery voltage to the voltage boosting circuit and the voltage stabilizing circuit; the voltage boosting circuit is used for boosting the voltage output by the power management circuit and outputting 5V voltage; the voltage stabilizing circuit is used for stabilizing the voltage output by the power management circuit and outputting stable 2.8 voltage to supply power to the singlechip; the step-down circuit is used for carrying out step-down processing on the 5V voltage output by the step-up circuit and then outputting 3.3 voltage to supply power to the WiFi module.

5. The MIFI portable router of claim 4, wherein: the power management circuit comprises a power management chip U92 with the model number SY6970, wherein a BUS pin of the power management chip U92 is connected with the output end of the overvoltage protection circuit, a BAT pin of the power management chip U92 is connected with a battery, and an LX pin of the power management chip U92 is respectively connected with the input end of the voltage boosting circuit and the input end of the voltage stabilizing circuit through an inductor L132.

6. The MIFI portable router of claim 4, wherein: the boost circuit comprises a boost chip U90 with the model SY7120, wherein an LX pin of the boost chip U90 is connected with the output end of the power management circuit through an inductor L131, and an OUT pin of the boost chip U90 is connected with the input end of the buck circuit.

7. The MIFI portable router of claim 4, wherein: the voltage stabilizing circuit comprises an LDO voltage stabilizing chip U60 with the model of AF6212, wherein the VIN pin of the LDO voltage stabilizing chip U60 is connected with the output end of the power management circuit through a resistor R1508, and the OUT pin of the LDO voltage stabilizing chip U60 is connected with the singlechip.

8. The MIFI portable router of claim 4, wherein: the step-down circuit comprises a step-down chip U97 with the model of SY8120, an IN pin of the step-down chip U97 is connected with the output end of the step-up circuit, and an LX pin of the step-down chip U97 is connected with the WiFi module through an inductor L125.

9. The MIFI portable router of any of claims 1-8, wherein: the power input end is provided with a Type-C interface or a USB interface.

10. The MIFI portable router of any of claims 1-8, wherein: the singlechip is a singlechip with the model of N7E003_QFN20.