CN114696415A

CN114696415A - Multi-power supply lighting lamp control circuit

Info

Publication number: CN114696415A
Application number: CN202210333751.XA
Authority: CN
Inventors: 卢建乔
Original assignee: Yuyao Tailian Lighting Electric Co ltd
Current assignee: Yuyao Tailian Lighting Electric Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-01

Abstract

The invention relates to a multi-power-supply illuminating lamp control circuit which comprises at least one charging socket, a plurality of batteries, a charging circuit, a discharging circuit, a control chip U1, a booster circuit and an output terminal, wherein the anode of each battery is connected to the booster circuit through the discharging circuit and is connected to at least one charging socket through the charging circuit, the discharging circuit comprises two switching tubes which are connected in series, and the two switching tubes which are connected in series are connected to corresponding pins of the control chip U1 through the control switching tubes; the charging circuit also comprises two switching tubes which are connected in series, and the two switching tubes which are connected in series are connected to corresponding pins of the control chip U1 through a second control switching tube; the boost circuit comprises a boost chip U3, an EN pin of the boost chip U3 is connected with a corresponding pin of the control chip U1, and the output terminal is connected to the boost chip U3. The circuit of the invention has low cost and can greatly improve the charge-discharge efficiency.

Description

Multi-power supply lighting lamp control circuit

Technical Field

The invention relates to the technical field of battery charging and discharging, in particular to a multi-power-supply illuminating lamp control circuit.

Background

In order to improve the convenience of the lighting lamp, the power supply mode of the lamp is designed to be various, so as to meet the use requirements of different occasions and increase the applicability. In some lighting lamps with various power supply modes, a plurality of batteries are generally arranged, and because a plurality of paths of batteries supply power to the lamp, the batteries are ensured not to be charged and discharged mutually so as to ensure safety and improve efficiency. The isolation mode commonly used at present is to carry out isolation through a diode, but because the forward voltage drop VF value of the diode conduction is large, the loss is too large; moreover, the charging and discharging sequence among a plurality of batteries of the existing lighting lamp is usually rigid, generally set by people, and cannot be intelligently adjusted.

Meanwhile, a part of the lighting lamps are also provided with a low lumen mode, a signal wire is required to be separately arranged in a general circuit to provide a trigger signal, whether the low lumen mode is started or not is determined according to the trigger signal, and the structure needs a longer signal wire to be unfavorable for cost control.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a multi-power-supply illumination lamp control circuit with low cost, which can discharge or charge a plurality of batteries orderly and efficiently and has a low lumen mode function.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

a multi-power-supply illuminating lamp control circuit comprises at least one charging socket, a plurality of batteries, a charging circuit, a discharging circuit, a control chip U1, a boost circuit and an output terminal, wherein the batteries or the charging sockets are connected with a power supply pin of the control chip U1 through a voltage stabilizing circuit, the anode of each battery is connected to the boost circuit through the discharging circuit and is connected to at least one charging socket through the charging circuit, the discharging circuit comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with the control switching tube, and the control switching tube is connected to a corresponding pin of the control chip U1; the charging circuit also comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with a second control switching tube, and the second control switching tube is connected to a corresponding pin of the control chip U1; the boost circuit comprises a boost chip U3, an EN pin of the boost chip U3 is connected with a corresponding pin of a control chip U1, the output terminal is connected to the boost chip U3, a switch tube is also arranged between an FB pin of the boost chip U3 and a grounding point, the switch tube is connected to a signal pin of the output terminal, and the output terminal is connected to a load.

As a preferable scheme: two switching tubes are further arranged between the output terminal and the load, and one of the switching tubes is connected to a B _ C pin and a DIM pin of the control chip U1.

As a preferable scheme: two switch tubes connected in series in the discharge circuit are PMOS tubes, and the control switch tube is an MOS tube.

As a preferable scheme: two switch tubes connected in series in the charging circuit are also PMOS tubes, and the second control switch tube is an NPN triode or an NMOS tube.

As a preferable scheme: and the two PMOS tubes are respectively connected with diodes with the protection function in parallel.

As a preferable scheme: the charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component.

As a preferable scheme: two resistors are also connected IN series between the positive electrode and the negative electrode of the charging socket, and the two resistors are connected to a CD _ IN pin of the control chip U1.

As a preferable scheme: and a capacitor and a resistor are also connected between the positive electrode and the negative electrode of the boosting chip U3 in a bridging manner.

As a preferable scheme: resistors are further connected in series between the positive electrode and the negative electrode of the battery, a capacitor is connected in parallel to one resistor, and a voltage acquisition pin of the control chip U1 is connected to the capacitor.

As a preferable scheme: the model of the component adopted by the voltage stabilizing circuit is AF33B, and the model of the boost chip U3 is XR2981, MP3437 or ME 2169.

Compared with the prior art, the invention has the beneficial effects that:

the circuit of the invention adopts the switching tube to realize the isolation of a plurality of batteries, and controls the discharge sequence through the control chip U1, the control chip U1 can collect the voltage information of a plurality of power supplies and discharge according to the high and low sequence of the power; certainly, one path of battery can be set to discharge firstly according to the requirement, and the other path of battery is discharged after the discharge is finished; and because the internal resistance of the switching tube is very small, the efficiency can be greatly improved.

In addition, a signal wire in the prior art is omitted by the mode that one pin of the boost chip is communicated with the pin of the control chip, and the cost is further reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic diagram of the circuit of the present invention;

FIG. 2 is a schematic diagram of voltage detection of two batteries according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a control chip of the charging/discharging circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a voltage regulator circuit according to an embodiment of the present invention

Fig. 5 is a schematic circuit diagram between an output terminal and a load according to an embodiment of the invention.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

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, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention is further illustrated by the following examples in conjunction with the following figures:

the multi-power-supply illuminating lamp control circuit shown in fig. 1 to 5 comprises at least one charging socket, a plurality of batteries, a charging circuit, a discharging circuit, a control chip U1, a voltage boosting circuit and an output terminal, wherein the batteries or the charging sockets are connected with a power supply pin of the control chip U1 through a voltage stabilizing circuit, the positive electrode of each battery is connected to the voltage boosting circuit through the discharging circuit and is connected to at least one charging socket through the charging circuit, the discharging circuit comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with the control switching tube, and the control switching tube is connected to a corresponding pin of the control chip U1; the charging circuit also comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with a second control switching tube, and the second control switching tube is connected to a corresponding pin of the control chip U1; the boost circuit comprises a boost chip U3, an EN pin of the boost chip U3 is connected with a corresponding pin of a control chip U1, the output terminal is connected to the boost chip U3, a switch tube is also arranged between an FB pin of the boost chip U3 and a ground point, the switch tube is connected to a signal pin of the output terminal, and the output terminal is connected to a load.

Two switching tubes are further arranged between the output terminal and the load, and one of the switching tubes is connected to a B _ C pin and a DIM pin of the control chip U1.

Two switch tubes connected in series in the discharge circuit are PMOS tubes, and the control switch tube is an MOS tube. Two switch tubes connected in series in the charging circuit are also PMOS tubes, and the second control switch tube is an NPN triode or an NMOS tube. And the two PMOS tubes are respectively connected with diodes with the protection function in parallel.

The charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component. Two resistors are also connected IN series between the positive electrode and the negative electrode of the charging socket, and the two resistors are connected to a CD _ IN pin of the control chip U1.

And a capacitor and a resistor are also connected between the positive electrode and the negative electrode of the boosting chip U3 in a bridging manner. Resistors are further connected in series between the positive electrode and the negative electrode of the battery, a capacitor is connected in parallel to one resistor, and a voltage acquisition pin of the control chip U1 is connected to the capacitor. The model of the component adopted by the voltage stabilizing circuit is AF33B, and the model of the boost chip U3 is XR2981, MP3437 or ME 2169.

The circuit of the invention is suitable for charging and discharging 2 and 3 batteries and more. The double PMOS replaces the diode for isolation, so that the power loss can be reduced, the service efficiency of the battery is improved, and the working time is prolonged.

BAT1 and BAT2 in fig. 1 are two rechargeable batteries: the battery can be the internal battery of the lamp, and can also be a detachable battery such as a charger, an electric tool battery pack and the like. The first path of discharging circuit passes the electricity of the first path of battery B1 through two PMOS: q10, Q6 discharge the boost circuit; the second path of discharge circuit passes the electricity of the second path of battery B2 through two PMOS: q11, Q4 discharge the boost circuit.

Because there are multiple batteries to supply power to the lamp, it is necessary to ensure that the batteries are not charged and discharged mutually to ensure safety and improve efficiency. The circuit can set one path of battery to discharge firstly according to the requirement, and then discharge the other path of battery after the discharge is finished; the discharge can be performed according to the high and low electric quantity sequence; the conventional isolation mode is to perform isolation through a diode, and because the forward voltage drop VF value of the diode conduction is large, the loss is too large. The circuit adopts two PMOS to realize isolation, and controls the discharge sequence through a control chip U1; because the internal resistance of the MOS is very small, the efficiency can be greatly improved.

As shown in fig. 1 and 3: when the boost circuit needs to be discharged by the B1, the control chip U1 enables the B1_ K to be high, and the B2_ K to be low, so that the B1 discharges to the LOAD1 through the Q10 and the Q6; if BAT2 is allowed to discharge LOAD1, B1_ K is low, B2_ K is high, so BAT2 discharges LOAD1 through Q11 and Q4; d7, D8, D2 and D9 are respectively used for protecting Q11, Q4, Q10 and Q6 of the PMOS, and the D7, the D8, the D2 and the D9 are not added according to practical application situations.

Also shown in fig. 1 are two rechargeable batteries and a single charging circuit, CD _1 high and CD _2 low when charging B1; CD _1 is low and CD _2 is high when BAT2 is charged. The electric energy source of the charging circuit can be a solar power generation component, and can also be a charger or other electricity storage equipment. The circuit of the invention can realize the charging and discharging of the battery by using the same interface.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A multi-power supply lighting lamp control circuit is characterized in that: the charging circuit comprises at least one charging socket, a plurality of batteries, a charging circuit, a discharging circuit, a control chip U1, a booster circuit and an output terminal, wherein the batteries or the charging sockets are connected with a power supply pin of the control chip U1 through a voltage stabilizing circuit, the anode of each battery is connected to the booster circuit through the discharging circuit and is connected to at least one charging socket through the charging circuit, the discharging circuit comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with a control switching tube, and the control switching tube is connected to a corresponding pin of the control chip U1; the charging circuit also comprises two switching tubes which are connected in series, the two switching tubes which are connected in series are connected with a second control switching tube, and the second control switching tube is connected to a corresponding pin of a control chip U1; the boost circuit comprises a boost chip U3, an EN pin of the boost chip U3 is connected with a corresponding pin of a control chip U1, the output terminal is connected to the boost chip U3, a switch tube is also arranged between an FB pin of the boost chip U3 and a grounding point, the switch tube is connected to a signal pin of the output terminal, and the output terminal is connected to a load.

2. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: two switching tubes are further arranged between the output terminal and the load, and one of the switching tubes is connected to a B _ C pin and a DIM pin of the control chip U1.

3. A multi-power-supply illumination lamp control circuit according to claim 1, characterized in that: two switch tubes connected in series in the discharge circuit are PMOS tubes, and the control switch tube is an MOS tube.

4. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: two switch tubes connected in series in the charging circuit are also PMOS tubes, and the second control switch tube is an NPN triode or an NMOS tube.

5. The multi-power-supply illumination lamp control circuit according to claim 3 or 4, characterized in that: and diodes with protection function are respectively connected in parallel on the two PMOS tubes.

6. The multi-power-supply illuminating lamp control circuit according to claim 4, characterized in that: the charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component.

7. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: two resistors are also connected IN series between the positive electrode and the negative electrode of the charging socket, and the two resistors are connected to a CD _ IN pin of the control chip U1.

8. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: and a capacitor and a resistor are also connected between the positive electrode and the negative electrode of the boosting chip U3 in a bridging manner.

9. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: resistors are further connected in series between the positive electrode and the negative electrode of the battery, a capacitor is connected in parallel to one resistor, and a voltage acquisition pin of the control chip U1 is connected to the capacitor.

10. The multi-power-supply illuminating lamp control circuit according to claim 1, characterized in that: the voltage stabilizing circuit adopts an AF33B model, and the booster chip U3 is XR2981, MP3437 or ME2169 model.