CN216599065U

CN216599065U - One drags many quick charge voltage monitoring circuit

Info

Publication number: CN216599065U
Application number: CN202122950196.9U
Authority: CN
Inventors: 李雪芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-24
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a one-driving-many quick charging voltage monitoring circuit, which relates to the field of constant current source power supply plates and comprises: the power supply module is used for supplying 5-20V direct current; the voltage monitoring module is used for monitoring whether the supplied direct current exceeds a threshold value or not, and outputting a signal to the conduction module when the supplied direct current exceeds the threshold value; the conducting module is used for controlling the circuit to be conducted when receiving the signal output by the voltage monitoring module; the output module is used for outputting 5V direct current; compared with the prior art, the power supply module is connected with the voltage monitoring module and the conduction module, the voltage monitoring module is connected with the conduction module, and the conduction module is connected with the output module, the utility model has the beneficial effects that: the utility model is used for monitoring the input voltage and conducting the subsequent circuit when the voltage exceeds the threshold voltage; otherwise, the connection between the power circuit and the system module is cut off to complete the supply of the required voltage.

Description

One drags many quick charge voltage monitoring circuit

Technical Field

The utility model relates to the field of constant current source power supply boards, in particular to a one-to-many quick charging voltage monitoring circuit.

Background

The constant current source, the alternating current constant current source, the direct current constant current source, the current generator and the large current generator are also called as a current source and a current stabilizing source, are wide-frequency-spectrum and high-precision alternating current and current stabilizing power supplies, have the advantages of high response speed and constant current precision, can stably work for a long time, and are suitable for loads with various properties (resistance, inductance and capacitance). The device is mainly used for detecting thermal relays, molded case circuit breakers, small-sized short-circuit devices and production occasions needing setting of rated current, action current, short-circuit protection current and the like.

The power supply of most circuits in the field of electronic circuits is in a voltage source mode. However, in some application occasions where only the constant current source supplies power, the constant current source needs to be processed and converted into a voltage source in a normal range to supply power to a target circuit board, the conversion output voltage of the existing conversion circuit is not monitored, whether the output voltage reaches the rated voltage required by the load work or not is difficult to determine, and improvement is needed.

Disclosure of Invention

The present invention is directed to a monitoring circuit for monitoring a charging voltage of a multi-terminal to solve the above-mentioned problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a one-to-many fast charge voltage monitoring circuit comprising: the power supply module is used for supplying 5-20V direct current; the voltage monitoring module is used for monitoring whether the supplied direct current exceeds a threshold value or not, and outputting a signal to the conduction module when the supplied direct current exceeds the threshold value; the conducting module is used for controlling the circuit to be conducted when receiving the signal output by the voltage monitoring module; the output module is used for outputting 5V direct current; the power supply module is connected with the voltage monitoring module and the conduction module, the voltage monitoring module is connected with the conduction module, and the conduction module is connected with the output module.

As a still further scheme of the utility model: the voltage monitoring module comprises a capacitor C17, a zener diode Z1, a resistor R4, a triode Q1, a resistor R12 and a resistor R5, one end of the capacitor C17 is connected with an emitter of the triode Q1, the resistor R5 and the power supply module, the other end of the capacitor C17 is grounded, a base of the triode Q1 is connected with a cathode of the zener diode Z1, an anode of the zener diode Z1 is connected with the resistor R4, the other end of the resistor R4 is grounded, a collector of the triode Q1 is connected with the resistor R12, the other end of the resistor R5 and the conducting module, and the other end of the resistor R12 is grounded.

As a still further scheme of the utility model: the conduction module comprises a MOS tube Q2, a MOS tube Q3 and a capacitor C9, the S pole of the MOS tube Q3 is connected with the power supply module and the S pole of the MOS tube Q2, the G pole of the MOS tube Q3 is connected with the G pole of the MOS tube Q2 and the voltage monitoring module, the D pole of the MOS tube Q3 is connected with the D pole of the MOS tube Q2, the capacitor C9 and the output module, and the other end of the capacitor C9 is grounded.

As a still further scheme of the utility model: the power supply module comprises a charging head CN2, the charging head CN2 is used for supplying power, a No. 1 pin of the charging head CN2 is grounded, and a No. 2 pin of the charging head CN2 is connected with the voltage monitoring module and the conduction module.

As a still further scheme of the utility model: charging head CN1 can replace charging head CN2 to supply power, pin No. 1 of charging head CN2 is grounded, and pin No. 6 of charging head CN1 is connected with voltage monitoring module and conducting module.

Compared with the prior art, the utility model has the beneficial effects that: the utility model is used for monitoring the input voltage and conducting the subsequent circuit when the voltage exceeds the threshold voltage; otherwise, the connection between the power circuit and the system module is cut off to complete the supply of the required voltage.

Drawings

Fig. 1 is a schematic diagram of a one-to-many fast charge voltage monitoring circuit.

Fig. 2 is a circuit diagram of a one-to-many fast charge voltage monitoring circuit.

Fig. 3 is a schematic diagram of a constant current power supply control power panel.

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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1, a circuit for monitoring a multi-split fast charge voltage includes: the power supply module is used for supplying 5-20V direct current; the voltage monitoring module is used for monitoring whether the supplied direct current exceeds a threshold value or not, and outputting a signal to the conduction module when the supplied direct current exceeds the threshold value; the conducting module is used for controlling the circuit to be conducted when receiving the signal output by the voltage monitoring module; the output module is used for outputting 5V direct current; the power supply module is connected with the voltage monitoring module and the conduction module, the voltage monitoring module is connected with the conduction module, and the conduction module is connected with the output module.

In a specific embodiment: referring to fig. 2 and 3, the OVP protection circuit of the constant current power supply control power board according to the present invention is configured to monitor whether an input voltage reaches a threshold, and the constant current power supply control power board completes conversion of a required voltage (filtering, DC step-down output in fig. 3), samples a temperature (a chip U4 and a temperature sensitive resistor R7 in fig. 2, and temperature sampling in fig. three), forms a constant current control (overcurrent protection adjustment control in fig. 3), and performs charging, data input, and data output through USB (power input, USB line data input, and USB line data output in fig. 3).

In this embodiment: referring to fig. 2, the voltage monitoring module includes a capacitor C17, a zener diode Z1, a resistor R4, a transistor Q1, a resistor R12, and a resistor R5, one end of the capacitor C17 is connected to an emitter of the transistor Q1, the resistor R5, and the power supply module, the other end of the capacitor C17 is grounded, a base of the transistor Q1 is connected to a cathode of the zener diode Z1, an anode of the zener diode Z1 is connected to the resistor R4, the other end of the resistor R4 is grounded, a collector of the transistor Q1 is connected to the resistor R12, the other end of the resistor R5, and the other end of the resistor R12 is grounded.

The transistor Q1 is a PNP transistor.

In this embodiment: referring to fig. 2, the conducting module includes a MOS transistor Q2, a MOS transistor Q3, and a capacitor C9, an S-pole of the MOS transistor Q3 is connected to the power supply module and an S-pole of the MOS transistor Q2, a G-pole of the MOS transistor Q3 is connected to a G-pole of the MOS transistor Q2 and the voltage monitoring module, a D-pole of the MOS transistor Q3 is connected to a D-pole of the MOS transistor Q2, the capacitor C9, and the output module, and the other end of the capacitor C9 is grounded.

MOS pipe Q2 and MOS pipe Q3 are PMOS pipes.

In this embodiment: referring to fig. 2, the power supply module includes a charging head CN2, the charging head CN2 is used for supplying power, the pin 1 of the charging head CN2 is grounded, and the pin 2 of the charging head CN2 is connected to the voltage monitoring module and the conducting module.

And the charging head CN2 completes the filtering and DC voltage reduction output processes.

In this embodiment: referring to fig. 2, the charging plug CN1 can supply power instead of the charging plug CN2, the pin 1 of the charging plug CN2 is grounded, and the pin 6 of the charging plug CN1 is connected to the voltage monitoring module and the conducting module.

The charging head CN1 also completes the filtering and DC voltage-reducing output process.

The working principle of the utility model is as follows: referring to fig. 2, the MOS transistors Q2 and Q3 are PMOS transistors, the voltage difference between the G pole and the S pole of the PMOS transistor is conducted when reaching a threshold value, and the S-pole voltages of the MOS transistors Q2 and Q3 are the sum of the voltages of the resistor R5 and the resistor R12, the G-pole voltages of the MOS transistors Q2 and Q3 are the voltage of the resistor R12, when the resistance value of the resistor R5 is greater than the resistance value of the resistor R12, as the voltage input by the power supply voltage module increases, the difference between the G pole and the S pole of the MOS transistors Q2 and Q3 becomes greater and greater, the transistor Q1 is not conducted at the beginning, the resistor R12 obtains a voltage through the resistor R5, and as the voltage input by the power supply module is greater, the voltage on the resistor R12 is greater, the MOS transistors Q3 and Q2 are conducted, and the voltage on the resistor R5 causes the emitter of the triode Q1 to be greater, so that the voltage difference between the base output voltage of the zener diode Z1 and the transistor Q1 is conducted. Only when the input voltage reaches the threshold voltage, the circuit is conducted, and the power supply supplies power to the output module through the conduction module.

It will be evident to those skilled in the art that the utility model 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 utility model 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

1. The utility model provides a one drags many quick charge voltage monitoring circuit which characterized in that:

the one-drive-many quick-charge voltage monitoring circuit comprises:

the power supply module is used for supplying 5-20V direct current;

the voltage monitoring module is used for monitoring whether the supplied direct current exceeds a threshold value or not, and outputting a signal to the conduction module when the supplied direct current exceeds the threshold value;

the conduction module is used for controlling the circuit to be conducted when receiving the signal output by the voltage monitoring module;

the output module is used for outputting 5V direct current;

the power supply module is connected with the voltage monitoring module and the conduction module, the voltage monitoring module is connected with the conduction module, and the conduction module is connected with the output module;

the voltage monitoring module comprises a capacitor C17, a zener diode Z1, a resistor R4, a triode Q1, a resistor R12 and a resistor R5, one end of the capacitor C17 is connected with an emitter of the triode Q1, the resistor R5 and the power supply module, the other end of the capacitor C17 is grounded, a base of the triode Q1 is connected with a cathode of the zener diode Z1, an anode of the zener diode Z1 is connected with the resistor R4, the other end of the resistor R4 is grounded, a collector of the triode Q1 is connected with the resistor R12, the other end of the resistor R5 and the conducting module, and the other end of the resistor R12 is grounded.

2. The one-driving-many fast-charge voltage monitoring circuit as claimed in claim 1, wherein the conducting module comprises a MOS transistor Q2, a MOS transistor Q3 and a capacitor C9, the S pole of the MOS transistor Q3 is connected to the power supply module and the S pole of the MOS transistor Q2, the G pole of the MOS transistor Q3 is connected to the G pole of the MOS transistor Q2 and the voltage monitoring module, the D pole of the MOS transistor Q3 is connected to the D pole of the MOS transistor Q2, the capacitor C9 and the output module, and the other end of the capacitor C9 is grounded.

3. The one-drive-many fast charging voltage monitoring circuit according to claim 1, wherein the power supply module comprises a charging head CN2, the charging head CN2 is used for supplying power, pin No. 1 of the charging head CN2 is grounded, and pin No. 2 of the charging head CN2 is connected with the voltage monitoring module and the conducting module.

4. The one-drive-many fast charging voltage monitoring circuit according to claim 3, wherein the charging head CN1 replaces the charging head CN2 to supply power, the pin No. 1 of the charging head CN2 is grounded, and the pin No. 6 of the charging head CN1 is connected with the voltage monitoring module and the conducting module.