CN112421730A - Anti-surge circuit of network transmission and access equipment - Google Patents

Anti-surge circuit of network transmission and access equipment Download PDF

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Publication number
CN112421730A
CN112421730A CN202011347942.9A CN202011347942A CN112421730A CN 112421730 A CN112421730 A CN 112421730A CN 202011347942 A CN202011347942 A CN 202011347942A CN 112421730 A CN112421730 A CN 112421730A
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CN
China
Prior art keywords
chip
circuit
resistor
capacitor
diode
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Pending
Application number
CN202011347942.9A
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Chinese (zh)
Inventor
陈宇飞
张兵
王思德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Jingchuang Technology Electronics Co ltd
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Shenzhen Jingchuang Technology Electronics Co ltd
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Application filed by Shenzhen Jingchuang Technology Electronics Co ltd filed Critical Shenzhen Jingchuang Technology Electronics Co ltd
Priority to CN202011347942.9A priority Critical patent/CN112421730A/en
Publication of CN112421730A publication Critical patent/CN112421730A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection

Abstract

The invention discloses a surge-proof circuit of network transmission and access equipment, which comprises a charging input circuit J4, a diode T6, a diode D3, an overvoltage protection chip U6, a chip U3, a DC-DC boost chip U5 and a voltage stabilizing circuit U4, wherein a port VBUS2 of the charging input circuit J4 is connected with a cathode of the diode T6, a cathode of the diode D3, a capacitor C55 and a pin 3 of the chip U6 through a fuse F1, and a pin 4 of the chip U6 is connected with a resistor R39 and a pin 4 of the chip U3. The anti-surge circuit of the device has simple and reasonable design, safety, reliability and low cost, is suitable for large-scale production, and has the anti-surge grade reaching +/-320V/5 seconds.

Description

Anti-surge circuit of network transmission and access equipment
Technical Field
The invention relates to the technical field of personal care and beauty instruments, in particular to an anti-surge circuit of network transmission and access equipment.
Background
The known existing visible blackhead suction instrument circuit has the problems that the anti-surge performance is poor, and a rear-stage circuit is damaged due to overhigh surge voltage at the moment of plugging and unplugging a charging wire. Referring to the schematic diagram of the conventional visual blackhead suction device circuit in fig. 1, in the power circuit module, the anti-surge circuit only uses an overvoltage protection diode T3, an overvoltage protection chip is not used, the charging management circuit U3 also has no overvoltage protection function, and cannot bear surge voltage of more than 24V, and the rear-stage circuit elements are damaged.
Disclosure of Invention
The present invention is directed to a surge protection circuit for network transmission and access equipment, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a surge-proof circuit of network transmission and access equipment comprises a charging input circuit J4, a diode T6, a diode D3, an overvoltage protection chip U6, a chip U3, a DC-DC boost chip U5 and a voltage stabilizing circuit U4, wherein a port VBUS 4 of the charging input circuit J4 is connected with a cathode of the diode T4, a cathode of the diode D4, a capacitor C4 and a pin 3 of the chip U4 through a fuse F4, a pin 4 of the chip U4 is connected with the resistor R4 and a pin 4 of the chip U4, the other end of the resistor R4 is connected with the resistor R4 and the capacitor C4, the other end of the capacitor C4 is connected with the other end of the resistor R4, a pin 5 of the chip U4 is connected with the capacitor C4, a pin 1 of the capacitor C4 and a positive electrode of a battery BT 4, and the negative electrode of the capacitor C4 and the ground voltage stabilizing circuit.
As a further technical scheme of the invention: the battery BT1 is also connected with a main control circuit module, the main control circuit module comprises a main control chip U1, a program storage chip U2, a crystal oscillator Y1, a status indicator lamp D2, a status indicator lamp D3, a status indicator lamp D4, an LED _ G, LED _ R, a radio frequency antenna E1, a filter capacitor C2, a crystal oscillator Y5 and a filter capacitor C3, the main control chip U1 is respectively connected with the program storage chip U2, the crystal oscillator Y1, the status indicator lamp D2, the status indicator lamp D3, the status indicator lamp D4, the LED _ G, LED _ R, the radio frequency antenna E1, the filter capacitor C2, the crystal oscillator Y5 and the filter capacitor C3.
As a further technical scheme of the invention: the DC-DC booster chip U5 outputs +5V direct current, and the voltage stabilizing circuit U4 outputs +3.0V direct current.
As a further technical scheme of the invention: the DC-DC boosting chip U5 is further connected with a camera module circuit, the camera module circuit comprises a camera sensor J2, an illuminating lamp LED, a triode Q1, an MOS tube Q2, data buses SEN0_ D2-SEN 0_ D9, control buses SEN0_ VSYN, SEN0_ PCLK, SEN0_ PWDN, SEN0_ MCLK, SEN0_ SDA and SEN0_ SCL, the camera sensor J2 is connected with the drain electrode of the MOS tube Q2 through a resistor R13, the gate of the MOS tube Q2 is connected with a resistor R21 and the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with the resistor R22 and the resistor R34, and the other end of the resistor R34 is connected with the illuminating lamp LED.
As a further technical scheme of the invention: the voltage stabilizing circuit U4 is further connected with an air pump circuit module, the air pump circuit module comprises an MOS tube Q3, a diode D5, a capacitor C19, a resistor R2, a resistor R3 and a motor J1, the gate of the MOS tube Q3 is connected with the resistor R2 and the resistor R3, the other end of the resistor R2 is connected with a main control chip U1, the other point of the resistor R3 is grounded, the source of the MOS tube Q3 is grounded, the drain of the MOS tube Q3 is connected with the anode of the diode D5, the capacitor C19 and the motor J1, and the cathode of the diode D5 is connected with the other end of the capacitor C19 and the other end of the motor J1.
As a further technical scheme of the invention: the MOS transistor Q3 is an N-MOS transistor.
As a further technical scheme of the invention: the transistor Q1 is an NPN transistor.
Compared with the prior art, the invention has the beneficial effects that: the anti-surge circuit of the device has simple and reasonable design, safety, reliability and low cost, is suitable for large-scale production, and has the anti-surge grade reaching +/-320V/5 seconds.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is a circuit diagram of a master control circuit module.
Fig. 3 is a circuit diagram of a camera module circuit.
Fig. 4 is a circuit diagram of the air pump circuit module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 1, a surge protection circuit for network transmission and access equipment includes a charging input circuit J4, a diode T6, a diode D3, an overvoltage protection chip U6, a DC-DC boost chip U6 and a voltage regulator circuit U6, a port VBUS 6 of the charging input circuit J6 is connected to a cathode of the diode T6, a cathode of the diode D6, a capacitor C6 and a pin 3 of the chip U6 through a fuse F6, a pin 4 of the chip U6 is connected to the resistor R6 and a pin 4 of the chip U6, the other end of the resistor R6 is connected to the resistor R6 and the capacitor C6, the other end of the capacitor C6 is connected to the other end of the resistor R6, a pin 5 of the chip U6 is connected to the capacitor C6, the pin 1 of the capacitor C6 and a positive electrode of the battery BT 6, the other end of the battery 6 is connected to a negative electrode of the capacitor C6, the battery T6, the other end of the battery 6 is connected to a typ input circuit of the capacitor C6 and a charging input circuit through, A5V power supply VBUS1 and VBUS2 are led IN from the port, USB _ IN is output through the overvoltage protection chip U6/ET9528, the USB _ IN is input into U3/ETA4056, and a charging power supply VBAT is output to the 3.7V lithium battery BT1 through conversion of the charging management circuit U3. When the charging wire is plugged and unplugged, a surge voltage signal exceeding +5V appears between the positive electrode of the USB wire and the ground wire, if the surge voltage is 6.1V-36V, the overvoltage protection chip U6/ET9528 closes the charging output, and if a transient surge voltage is connected to the USB _ IN wire IN series, the chip U3/ETA4056 with overvoltage protection can bear voltage impact below 24V. If the surge voltage is more than 24V, the overvoltage protection diode T6/PTVSHC3N24VUH is subjected to avalanche conduction, and 5500W surge energy can be absorbed to the maximum extent. If the surge voltage is more than 40V, the 40V overvoltage protection diode D3/PSBD1DF40V1H is subjected to avalanche conduction and can absorb 40W surge energy, the USB charging wire with the length of 0.8 meter and the self-recovery fuse F1/24V/0.5A play a certain buffering role on the surge voltage, and in conclusion, after the surge impact of plus 320V/5 seconds through actual measurement, the circuit has no element damage and protects the safety of a battery and a rear-stage related circuit. In another situation, when a negative surge voltage signal appears between the positive electrode of the USB cable and the ground wire at the moment of plugging and unplugging the charging cable, if the surge voltage is below-0.75V, the overvoltage protection diode T6/PTVSHC3N24VUH is in forward conduction, which can absorb 5500W surge energy to the maximum, and the overvoltage diode D3/PSBD1DF40V1H is also in forward conduction, which can absorb 40W surge energy to the maximum, and the USB charging cable and the self-recovery fuse F1/24V/0.5A with a length of 0.8 m play a certain role in buffering the surge voltage, so as to sum up, after the surge impact of-320V/5 seconds, the circuit has no damage to any element, and protects the safety of the battery and related circuits at the later stage. The input end of the DC-DC booster circuit U5 is connected with the battery VBAT, and after the battery VBAT is boosted to +5V by the booster circuit, the battery VBAT is output to the air pump circuit module to supply power to the air pump circuit module. The LDO 3.0V voltage stabilizing circuit U4 outputs +3.0V to supply power for the main control circuit module, and simultaneously divides one path of +3.0V to supply power for the camera circuit module.
Example 2: on the basis of example 1: as shown in fig. 2-4, the battery BT1 is further connected to a main control circuit module, the main control circuit module includes a main control chip U1, a program storage chip U2, a crystal oscillator Y1, a status indicator lamp D2, D3, D4, an LED _ G, LED _ R, a radio frequency antenna E1, a filter capacitor C20, C25, and C30, the main control chip U1 is connected to the program storage chip U2, the crystal oscillator Y1, the status indicator lamps D2, D3, D4, the LED _ G, LED _ R, the radio frequency antenna E1, the filter capacitors C20, C25, and C30, and the main control chip U1 is responsible for processing an image signal from the camera circuit module, converting and encoding the image signal into a standard WIFI protocol radio frequency signal, transmitting the standard WIFI protocol radio frequency signal through the antenna E1, and when a WIFI connection with the mobile phone is successful, opening a corresponding APP on the mobile phone can display an image.
The DC-DC boosting chip U5 is also connected with a camera module circuit, the camera module circuit comprises a camera sensor J2, a lighting lamp LED, a triode Q1, a MOS tube Q2, data buses SEN0_ D2-SEN 0_ D9, control buses SEN0_ VSYN, SEN0_ PCLK, SEN0_ PWDN, SEN0_ MCLK, SEN0_ SDA and SEN0_ SCL, the camera sensor J2 is connected with the drain electrode of the MOS tube Q2 through a resistor R13, the gate electrode of the MOS tube Q2 is connected with a resistor R21 and the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with a resistor R22 and a resistor R34, the other end of the resistor R34 is connected with the lighting lamp LED, the camera sensor J2 shoots an external image, and the external image is transmitted to a main control circuit through the data buses SEN0_ D2-SEN 0_ D9, and the main control circuit is further transmitted to a processing module. The camera sensor J2 is connected to the main control circuit module through control buses SEN0_ VSYN, SEN0_ PCLK, SEN0_ PWDN, SEN0_ MCLK, SEN0_ SDA, SEN0_ SCL, and receives control from the main control circuit module.
The voltage stabilizing circuit U4 is further connected with an air pump circuit module, the air pump circuit module comprises a MOS tube Q3, a diode D5, a capacitor C19, resistors R2 and R3 and a motor J1, the gate of the MOS tube Q3 is connected with a resistor R2 and a resistor R3, the other end of the resistor R2 is connected with the main control chip U1, the other point of the resistor R3 is grounded, the source of the MOS tube Q3 is grounded, the drain of the MOS tube Q3 is connected with the anode of the diode D5, the capacitor C19 and the motor J1, the cathode of the diode D5 is connected with the other end of the capacitor C19 and the other end of the motor J1, when the system is in a power-on state, the circuit receives a control signal MOTO _ CTL from the main control circuit module, when the MOTO _ CTL is at a high level, the N-MOS tube Q3 is conducted, two ends of the motor J1 generate a voltage. After the motor is started, the rotating shaft of the motor is connected with a mechanical component related to the air pump, so that the suction nozzle part is forced to generate negative pressure for sucking the blackhead.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. A network transmission and access equipment surge-proof circuit comprises a charging input circuit J4, a diode T6, a diode D3, an overvoltage protection chip U6, a chip U3, a DC-DC boost chip U5 and a voltage stabilizing circuit U4, and is characterized in that a port VBUS 4 of the charging input circuit J4 is connected with a cathode of the diode T4, a cathode of the diode D4, a capacitor C4 and a pin 3 of the chip U4 through a fuse F4, a pin 4 of the chip U4 is connected with the resistor R4 and a pin 4 of the chip U4, the other end of the resistor R4 is connected with the resistor R4 and the capacitor C4, the other end of the capacitor C4 is connected with the other end of the resistor R4, a pin 5 of the chip U4 is connected with the capacitor C4, the pin 5 of the DC-DC boost chip U4, a pin 1 of the U4 and a positive pole of the battery 4, and the voltage stabilizing circuit B4, and the negative pole of the capacitor C4 are connected with the.
2. The network transmission and access equipment surge-proof circuit as claimed in claim 1, wherein the battery BT1 is further connected with a main control circuit module, the main control circuit module comprises a main control chip U1, a program storage chip U2, a crystal oscillator Y1, a status indicator lamp D2, D3, D4, LED _ G, LED _ R, a radio frequency antenna E1, a filter capacitor C2, C5, C3, the main control chip U1 is respectively connected with the program storage chip U2, the crystal oscillator Y1, the status indicator lamp D2, D3, D4, LED _ G, LED _ R, a radio frequency antenna E1, a filter capacitor C2, C5, C3.
3. The surge protection circuit for network transmission and access equipment according to claim 2, wherein the DC-DC boost chip U5 outputs +5V DC, and the voltage regulator circuit U4 outputs +3.0V DC.
4. The surge-proof circuit for network transmission and access equipment of claim 2, wherein the DC-DC boost chip U5 is further connected with a camera module circuit, the camera module circuit comprises a camera sensor J2, a lamp LED, a transistor Q1, a MOS transistor Q2, data buses SEN0_ D2 to SEN0_ D9, control buses SEN0_ VSYN, SEN0_ PCLK, SEN0_ PWDN, SEN0_ MCLK, SEN0_ SDA, SEN0_ SCL, the camera sensor J2 is connected with the drain of the MOS transistor Q2 through a resistor R13, the gate of the MOS transistor Q2 is connected with a resistor R21 and the collector of a transistor Q1, the base of the transistor Q1 is connected with a resistor R22 and a resistor R34, and the other end of the resistor R34 is connected with the lamp LED.
5. The surge protection circuit for network transmission and access equipment of claim 4, wherein the voltage regulator circuit U4 is further connected with an air pump circuit module, the air pump circuit module comprises a MOS tube Q3, a diode D5, a capacitor C19, resistors R2, R3 and a motor J1, a gate of the MOS tube Q3 is connected with a resistor R2 and a resistor R3, the other end of the resistor R2 is connected with the main control chip U1, the other point of the resistor R3 is grounded, a source of the MOS tube Q3 is grounded, a drain of the MOS tube Q3 is connected with an anode of the diode D5, the capacitor C19 and the motor J1, and a cathode of the diode D5 is connected with the other end of the capacitor C19 and the other end of the motor J1.
6. The surge protection circuit for network transmission and access equipment according to claim 5, wherein the MOS transistor Q3 is an N-MOS transistor.
7. The surge protection circuit for network transmission and access equipment as claimed in claim 4, wherein said transistor Q1 is an NPN transistor.
CN202011347942.9A 2020-11-26 2020-11-26 Anti-surge circuit of network transmission and access equipment Pending CN112421730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011347942.9A CN112421730A (en) 2020-11-26 2020-11-26 Anti-surge circuit of network transmission and access equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011347942.9A CN112421730A (en) 2020-11-26 2020-11-26 Anti-surge circuit of network transmission and access equipment

Publications (1)

Publication Number Publication Date
CN112421730A true CN112421730A (en) 2021-02-26

Family

ID=74842518

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011347942.9A Pending CN112421730A (en) 2020-11-26 2020-11-26 Anti-surge circuit of network transmission and access equipment

Country Status (1)

Country Link
CN (1) CN112421730A (en)

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