CN111741571B - Disconnect-type power control device and flashlight - Google Patents

Disconnect-type power control device and flashlight Download PDF

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Publication number
CN111741571B
CN111741571B CN202010847000.0A CN202010847000A CN111741571B CN 111741571 B CN111741571 B CN 111741571B CN 202010847000 A CN202010847000 A CN 202010847000A CN 111741571 B CN111741571 B CN 111741571B
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circuit board
power supply
resistor
power
chip
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CN111741571A (en
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覃俐玲
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Shenzhen Aschip Tech Co ltd
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Shenzhen Aschip Tech Co ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/08—Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells
    • F21L4/085—Pocket lamps
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
    • G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a separated power supply control device and a flashlight, wherein the separated power supply control device comprises a first circuit board, a second circuit board and a battery; the first circuit board is provided with a USB interface, a power supply anode and a common electrode, the second circuit board is provided with a power supply cathode and a common electrode, the battery is provided with an anode and a cathode, the USB interface of the first circuit board is connected with the charging device, the power supply anode of the first circuit board is connected with the anode of the battery, and the power supply cathode of the second circuit board is connected with the cathode of the battery; and a power line is connected between the common pole of the first circuit board and the common pole of the second circuit board so as to control the normal power supply of the first circuit board and the second circuit board. The technical scheme of the invention reduces the space occupation in the electronic product and improves the space utilization rate of the separated power supply control device in the electronic product.

Description

Disconnect-type power control device and flashlight
Technical Field
The invention relates to the technical field of power supplies, in particular to a separated power supply control device and a flashlight.
Background
In the power supply mode of the existing electronic product, a power supply function board generally comprises a circuit board, and a power supply anode and a power supply cathode are arranged on the circuit board. When the electronic product is controlled by a separate power supply, two circuit boards are needed, each circuit board needs a power supply part to respectively supply power to circuits on the circuit board, if one circuit board is provided with a power supply anode and a power supply cathode, and the other circuit board needs two wires to be connected with the circuit board provided with the power supply anode and the power supply cathode when the other circuit board needs the power supply. Or when the power function board needs two circuit boards, each circuit board can work only by the power supply part, if one circuit board has a power anode and the other circuit board has a power cathode, two wires are needed to be connected with each other between the two circuit boards so as to respectively transmit the anode and the cathode to each other.
However, when two circuit boards are required to be used in a small electronic product, the above power supply methods are not suitable due to the size limitation of the small electronic product, and there is no space for placing many wires in the electronic product.
Disclosure of Invention
The invention mainly aims to provide a separated power supply control device and a flashlight, and aims to improve the space utilization rate of the separated power supply control device in the flashlight.
In order to achieve the above object, the separated power control device provided by the invention comprises a first circuit board, a second circuit board and a battery;
the first circuit board is provided with a USB interface, a power supply anode and a common electrode, the second circuit board is provided with a power supply cathode and a common electrode, the battery is provided with an anode and a cathode, the USB interface of the first circuit board is connected with a charging device, the power supply anode of the first circuit board is connected with the anode of the battery, and the power supply cathode of the second circuit board is connected with the cathode of the battery;
and a power line is connected between the common pole of the first circuit board and the common pole of the second circuit board so as to control the normal power supply of the first circuit board and the second circuit board.
Optionally, the first circuit board includes a charging management module, a power supply determination module, and a charging status indication module;
the input end of the charging management module is connected with the USB interface, the output end of the charging management module is connected with the battery and is the power supply anode of the first circuit board, the detection end of the power supply judgment module is electrically connected with the charging management module, and the output end of the power supply judgment module is electrically connected with the charging state indication module;
the charging management module is used for converting the input power supply voltage to output the input power supply voltage to the battery;
and the power supply judging module is used for judging the charging state of the battery and controlling the charging state indicating module to display the charging state of the battery.
Optionally, the charging management module includes a first resistor, a thirtieth resistor, a third resistor, a second capacitor, a sixth diode, and a power management chip;
the first end of the first resistor is connected with the adjusting end of the power management chip, the second end of the first resistor is grounded with the common end of the second end of the thirty-second resistor and is a common pole of the first circuit board, the common ends of the first end of the thirty-second resistor and the second end of the third resistor are connected with the enabling end of the power management chip, the first end of the third resistor is connected with the input end of the power management chip, the output end of the power management chip, the first end of the second capacitor and the anode of the sixth diode are connected with each other, the second end of the second capacitor is grounded, and the cathode of the sixth diode is the positive power supply pole of the first circuit board.
Optionally, the model of the power management chip is ETA 6027.
Optionally, the power supply judging module includes a power supply detecting chip, a ninth resistor, a seventeenth resistor and a seventeenth capacitor;
the power supply detection chip comprises a detection end and a USB end, the USB end of the power supply detection chip is connected with the enabling end of the power supply management chip, the first end of the ninth resistor and the common end of the first end of the seventeenth capacitor are connected with the detection end of the power supply detection chip, the second end of the seventeenth capacitor and the common end of the first end of the seventeenth resistor are grounded, and the second end of the ninth resistor and the common end of the second end of the seventeenth resistor are the common electrode of the first circuit board.
Optionally, the charge state indicating module comprises a twenty-first resistor, a twenty-second resistor, a green indicator light and a red indicator light;
the power detection chip further comprises a first control end and a second control end, the first control end of the power detection chip is connected with the first end of the twenty-first resistor, the second end of the twenty-first resistor is connected with the cathode of the green indicator lamp, the second control end of the power detection chip is connected with the first end of the twenty-second resistor, the second end of the twenty-second resistor is connected with the cathode of the red indicator lamp, and the anode of the green indicator lamp and the public end of the anode of the red indicator lamp are power ends.
Optionally, the second circuit board includes a boost module, a main control circuit, and an electric quantity indication module;
the input end of the boosting module is a common electrode of the second circuit board, the output end of the boosting module is connected with the input end of the main control circuit, and the output end of the main control circuit is connected with the electric quantity indicating module;
the boosting module is used for boosting the input power supply voltage to supply power to the main control circuit;
the main control circuit is used for controlling the electric quantity indicating module to indicate the electric quantity of the battery and outputting a PWM signal to control the working mode switching of the working lamp.
Optionally, the main control circuit includes a main control chip, a first switch and a second switch;
the first switch is a single-pole double-throw switch, a first end and a second end of the first switch are respectively connected to the main control chip, a first end of the second switch is connected to the main control chip, and a third end of the first switch is connected with a second end of the second switch and is a power supply cathode of the second circuit board;
the first switch and the second switch are used for controlling the working lamp to be switched into an explosion flashing mode, a normally bright mode or a slightly bright mode under the control of the main control chip.
Optionally, the electric quantity indicating module includes a plurality of LED lamps, anodes of the plurality of LED lamps are respectively connected to the main control chip, and cathodes of the plurality of LED lamps are commonly connected to the power supply negative electrode of the second circuit board.
The invention also provides a flashlight which comprises the separated power supply control device, wherein the separated power supply control device comprises a first circuit board, a second circuit board and a battery;
the first circuit board is provided with a USB interface, a power supply anode and a common electrode, the second circuit board is provided with a power supply cathode and a common electrode, the battery is provided with an anode and a cathode, the USB interface of the first circuit board is connected with a charging device, the power supply anode of the first circuit board is connected with the anode of the battery, and the power supply cathode of the second circuit board is connected with the cathode of the battery;
and a power line is connected between the common pole of the first circuit board and the common pole of the second circuit board so as to control the normal power supply of the first circuit board and the second circuit board.
The separated power supply control device in the technical scheme of the invention comprises a first circuit board, a second circuit board and a battery, wherein the first circuit board is provided with a USB interface, a power supply anode and a common electrode; a power line is connected between the common pole of the first circuit board and the common pole of the second circuit board to control the normal power supply of the first circuit board and the second circuit board, so that each module and each chip on the first circuit board and each module and each chip on the second circuit board can work normally. The problem of supply power for first circuit board and second circuit board in the electronic product of correlation technique, need complicated line connection, the space occupies great in the electronic product that leads to is solved, and the disconnect-type power supply control device of this scheme is applied to among the small-size electronic product, because the power supply of first circuit board and second circuit board, directly connect the public utmost point of first circuit board and the public utmost point of second circuit board through a power cord, do not increase complicated line connection, the power supply of first circuit board and second circuit board has been realized promptly, the occupation of space in the electronic product has been reduced, the space utilization of disconnect-type power supply control device in the electronic product has been promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a separated power control apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of a first circuit board in the separated power control apparatus according to the present invention;
fig. 3 is a schematic circuit structure diagram of a charging state indicating module of a first circuit board in the separated power control device according to an embodiment of the invention;
fig. 4 is a schematic circuit structure diagram of a constant current control module of a first circuit board in the separated power supply control device according to an embodiment of the invention;
FIG. 5 is a schematic circuit diagram of an embodiment of a second circuit board in the separated power control apparatus according to the present invention;
fig. 6 is a schematic circuit structure diagram of an electric quantity indicating module of a second circuit board in the separated power control device according to an embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a separated power supply control device and a flashlight.
In an embodiment of the present invention, referring to fig. 1, the separate power control apparatus includes a first circuit board 10, a second circuit board 20, and a battery 30;
the first circuit board 10 is provided with a USB interface, a power supply positive pole B + and a common pole, the second circuit board 20 is provided with a power supply negative pole B-and a common pole, the battery 30 is provided with a positive pole and a negative pole, the USB interface of the first circuit board 10 is connected with a charging device, the power supply positive pole B + of the first circuit board 10 is connected with the positive pole of the battery 30, and the power supply negative pole B-of the second circuit board 20 is connected with the negative pole of the battery 30;
a power line is connected between the common pole of the first circuit board 10 and the common pole of the second circuit board 20 to control the normal power supply of the first circuit board 10 and the second circuit board 20.
In this embodiment, referring to fig. 2 and fig. 3, the first circuit board 10 includes a charging management module 11, a power supply determination module 12, and a charging status indication module 13;
the input end of the charging management module 11 is connected to the USB interface, the output end of the charging management module 11 is connected to the battery 30 and is a positive power supply B + of the first circuit board 10, the detection end of the power supply judgment module 12 is electrically connected to the charging management module 11, and the output end of the power supply judgment module 12 is electrically connected to the charging status indication module 13;
the charging management module 11 is configured to convert an input power voltage to output the converted input power voltage to the battery 30;
the power supply judging module 12 is configured to judge a charging state of the battery 30, and control the charging state indicating module 13 to display the charging state of the battery 30.
The separated power supply control device in the technical scheme of the invention comprises a first circuit board 10, a second circuit board 20 and a battery 30, wherein the first circuit board 10 is provided with a USB interface, a power supply anode B + and a common pole, the second circuit board 20 is provided with a power supply cathode B-and a common pole, the battery 30 is provided with an anode and a cathode, the USB interface of the first circuit board 10 is connected with a charging device, the power supply anode B + of the first circuit board 10 is connected with the anode of the battery 30, and the power supply cathode B-of the second circuit board 20 is connected with the cathode of the battery 30; a power line is connected between the common electrode of the first circuit board 10 and the common electrode of the second circuit board 20 to control the normal power supply of the first circuit board 10 and the second circuit board 20, so that the modules and chips on the first circuit board 10 and the modules and chips on the second circuit board 20 can work normally. The problem of for first circuit board 10 and second circuit board 20 power supply in the electronic product of correlation technique, need complicated line connection, the space occupies great in the electronic product that leads to is solved, and the disconnect-type power control device of this scheme is applied to among the small-size electronic product, because the power supply of first circuit board 10 and second circuit board 20, directly connect the common utmost point of first circuit board 10 and the common utmost point of second circuit board 20 through a power cord, do not increase complicated line connection, the power supply of first circuit board 10 and second circuit board 20 has been realized promptly, the occupation of space in the electronic product has been reduced, the space utilization of disconnect-type power control device in the electronic product has been promoted.
In an embodiment, as shown in fig. 2, a specific circuit includes a USB interface, a charging management module 11 and a power supply determination module 12, where the charging management module 11 includes a first resistor R1, a thirtieth resistor R30, a third resistor R3, a second capacitor C2, a sixth diode D6 and a power supply management chip U11;
a first end of the first resistor R1 is connected to the adjustment end of the power management chip U11, a second end of the first resistor R1 is grounded to a common end of a second end of the thirtieth resistor R30 and is a common electrode of the first circuit board 10, a common end of the first end of the thirtieth resistor R30 and a common end of a second end of the third resistor R3 are connected to an enable end of the power management chip U11, a first end of the third resistor R3 is connected to an input end of the power management chip U11, an output end of the power management chip U11, a first end of the second capacitor C2 and an anode of the sixth diode D6 are connected to each other, a second end of the second capacitor C2 is grounded, and a cathode of the sixth diode D6 is a positive power supply B + of the first circuit board 10.
The power supply judging module 12 comprises a power supply detecting chip U3, a ninth resistor R9, a seventeenth resistor R17 and a seventeenth capacitor C17;
the power detection chip U3 includes sense terminal and USB end, the USB end of power detection chip U3 with the enable end of power management chip U11 is connected, the first end of ninth resistance R9 with the common terminal of the first end of seventeenth electric capacity C17 with the sense terminal of power detection chip U3 is connected, the second end of seventeenth electric capacity C17 with the common terminal ground connection of the first end of seventeenth resistance R17, the second end of ninth resistance R9 with the common terminal of the second end of seventeenth resistance R17 is the common pole of first circuit board 10.
As shown in fig. 3, a specific circuit is a charging state indicating module 13 connected to the power determining module 12, where the charging state indicating module 13 includes a twenty-first resistor R21, a twenty-second resistor R22, a green indicator light GLED, and a red indicator light RLED;
the power detection chip U3 further includes a first control end GREEN and a second control end RED, the first control end GREEN of the power detection chip U3 is connected with the first end of the twenty-first resistor R21, the second end of the twenty-first resistor R21 is connected with the cathode of the GREEN indicator light RLED, the second control end RED of the power detection chip U3 is connected with the first end of the twenty-second resistor R22, the second end of the twenty-second resistor R22 is connected with the cathode of the RED indicator light RLED, and the anode of the GREEN indicator light GLED and the common end of the anode of the RED indicator light RLED are power supply ends.
Specifically, referring to fig. 2, the specific circuit connections of the USB interface, the charging management module 11, the power supply determination module 12 and the voltage conversion circuit thereof are as follows: a first end of a first capacitor C1, a first end of a third resistor R3, and an input end VIN of the power management chip U11 are all connected to a positive input end V + of the USB interface, a second end of the first capacitor C1, a second end of a thirty-th resistor R30, and a second end of the first resistor R1 are grounded, a common end of a second end of the third resistor R3 and a first end of a thirty-th resistor R30 is connected to an enable end EN of the power management chip U11, an output end OUT of the power management chip U11, a first end of a second capacitor C2, and an anode of a sixth diode D6 are connected to each other, a second end of the second capacitor C2 is grounded, a first end of the first resistor R1 is connected to a regulation end LIM of the power management chip, a common end of a cathode of the sixth diode D6, a source of the first switch Q1, and a gate of the tenth resistor R10 are connected to a positive power supply electrode B + of the first circuit board 10, a gate of the first switch Q1 is connected to a second end V8 of, the common terminal of the drain of the first switch transistor Q1, the second terminal of the eighth resistor R8, and the first terminal of the first inductor L1 is a power supply terminal. A second end of the first inductor L1 and a common end of an anode of the first diode D1 are connected to an input end of the first voltage conversion chip U2, a cathode of the first diode D1 and an anode of the twenty-second capacitor C22 are both connected to an output end of the first voltage conversion chip U2, a cathode of the twenty-second capacitor C22 is grounded, a first end of the fourteenth resistor R14 and a common end of a drain of the second switch tube Q2 are connected to an output end of the first voltage conversion chip U2, a source of the second switch tube Q2 is a power supply anode B +, a gate of the second switch tube Q2, a second end of the fourteenth resistor R14, a first end of the nineteenth resistor R19 and a cathode of the eighth diode D8 are connected to each other, a second end of the nineteenth resistor R19 is connected to an output end of the power supply detection chip U3, an anode of the eighth diode D8 is connected to an anode of the fifth diode D5, and a cathode of the fifth diode V5 + of the USB interface is connected to a cathode 5V 367, The cathode of the second diode D2 and the common end of the first end of the fourth capacitor C4 are connected to the power supply terminal VDD of the power detection chip U3 and to the output terminal of the first voltage conversion chip U2, the second end of the fourth capacitor C4 is connected to the ground terminal of the power detection chip U3, the anode of the second diode D2 and the common end of the anode of the third capacitor C3 are connected to the output terminal of the second voltage conversion chip U4, the input terminal of the second voltage conversion chip U4 is connected to the first end of the third inductor L3, the second end of the third inductor L3 is connected to the anode of the eleventh capacitor C11, and the cathode of the eleventh capacitor C11 and the common end of the cathode of the third capacitor C3 are connected to the ground terminal of the second voltage conversion chip U4. The USB terminal of the power detection chip U3 is connected to the enable terminal of the power management chip U11, the common terminal of the first terminal of the ninth resistor R9 and the first terminal of the seventeenth capacitor C17 is connected to the detection terminal of the power detection chip U3 and to the detection terminal ANI of the power detection chip U3, the common terminals of the second terminal of the seventeenth capacitor C17 and the first terminal of the seventeenth resistor R17 are grounded and connected to the ground terminal of the second voltage conversion chip U4, and the common terminal of the second terminal of the ninth resistor R9 and the second terminal of the seventeenth resistor R17 is the common terminal of the first circuit board 10.
Further, the first circuit board 10 of the present embodiment further includes a constant current control module, and as shown in fig. 4, a power supply terminal of a constant current control chip U7 is connected to a second terminal of a twentieth resistor R20 in the power supply determining module 12, a first terminal of a twentieth resistor R20 is connected to a power output terminal HVDD of a power detecting chip U3, a first terminal of a ninth capacitor C9 is connected to a power supply terminal of a constant current control chip U7, a second terminal of a ninth capacitor C9 is connected to a second terminal of a sixteenth resistor R16 and is a common electrode of the first circuit board 10, a first terminal of a sixteenth resistor R16 is connected to a source of a fourth switch Q4 and is a detecting terminal CS of the constant current control chip U7, a gate of a fourth switch Q4 is an interrupting terminal EXT of the constant current control chip U7, a gate of the fourth switch Q4, a second terminal of a drain of the second resistor R2, and a common terminal of the cathode of the working lamp LEDS, the first terminal of the second resistor R2 and the common terminal of the anode of the operating lamp LEDS are the positive B + input terminal of the power supply.
In an embodiment, referring to fig. 5 and fig. 6, the second circuit board 20 includes a voltage boosting module, a main control circuit, and a power indication module;
the input end of the boosting module is the common electrode of the second circuit board 20, the output end of the boosting module is connected with the input end of the main control circuit, and the output end of the main control circuit is connected with the electric quantity indicating module;
the boosting module is used for boosting the input power supply voltage to supply power to the main control circuit;
the main control circuit is used for controlling the electric quantity indicating module to indicate the electric quantity of the battery 30 and outputting a PWM signal to control the switching of the working mode of the working lamp.
In this embodiment, referring to fig. 5, the main control circuit includes a main control chip U6, a first switch S1, and a second switch S2;
the first switch S1 is a single-pole double-throw switch, a first end and a second end of the first switch S1 are respectively connected to the main control chip U6, a first end of the second switch S2 is connected to the main control chip U6, a third end of the first switch S1 is connected to a second end of the second switch S2 and is a power supply negative electrode B-of the second circuit board 20;
the first switch S1 and the second switch S2 are configured to control the working lamp to switch to an explosion mode, a normal lighting mode or a slight lighting mode under the control of the main control chip U6.
In this embodiment, referring to fig. 6, the power indication module includes a plurality of LED lamps, anodes of the plurality of LED lamps are respectively connected to the main control chip U6, and cathodes of the plurality of LED lamps are commonly connected to the negative electrode B-of the power supply of the second circuit board 20.
Specifically, referring to fig. 5, the specific circuit connections of the boost module and the main control circuit in the second circuit board 20 are as follows: the first control end S1-1 of the first switch in the main control chip U6 is connected with the first end of the first switch S1, the second control end S1-2 of the first switch in the main control chip U6 is connected with the second end of the first switch S1, the control end of the second switch S2 in the main control chip U6 is connected with the first end of the second switch S2, the third end of the first switch S1, the second end of the second switch S2, the second end of the thirteenth resistor R13 and the second end of the fifth capacitor C5 are connected with each other and are the power negative electrode B of the second circuit board 20, the common end of the first end of the thirteenth resistor R13, the first end of the fifth capacitor C5 and the second end of the twelfth resistor R12 is connected with the battery positive electrode end of the main control chip U6, the common end of the first end of the twelfth resistor R12, the first end of the sixth capacitor C6 and the common end of the second inductor L2 is the common end of the second circuit board 20, a second end of the second inductor L2 is connected to an input end of the third voltage conversion chip U5, a second end of the sixth capacitor C6, a first end of the seventh capacitor C7, and a common end of a negative electrode of the eighth capacitor C8 are connected to a ground end of the third voltage conversion chip U5 and a ground end of the main control chip U6, respectively, an output end of the third voltage conversion chip U5 is connected to an anode of the third diode D3, a cathode of the third diode D3, a second end of the seventh capacitor C7, and a common end of a positive electrode of the eighth capacitor C8 are connected to a power supply end VDD of the main control chip U6, an output end OUT of the main control chip U6 is connected to a first end of an eleventh resistor R11, a second end of the eleventh resistor R11, a first end of the tenth resistor R10, and a gate of the third switching tube Q3 are connected to each other, a drain of the third tube Q3 and a common end of the first end of the fifteenth resistor R15 are connected to a source of the first switch tube Q4610, and a source of the third, A second terminal of the tenth resistor R10 and a common terminal of an anode of the fourth diode D4 are connected to a power supply cathode B-of the second circuit board 20, and a second terminal of the fifteenth resistor R15 and a cathode of the fourth diode D4 are connected.
In an embodiment, referring to fig. 6, a specific circuit of the power indication module may be that a first end of a fourth resistor R4, a first end of a fifth resistor R5, a first end of a sixth resistor R6, and a first end of a seventh resistor R7 are respectively connected to a plurality of LED lamp control ends of the main control chip U6, a second end of the fourth resistor R4 is connected to an anode of the first LED lamp LED1, a second end of the fifth resistor R5 is connected to an anode of the second LED lamp LED2, a second end of the sixth resistor R6 is connected to an anode of the third LED lamp LED3, a second end of the seventh resistor R7 is connected to an anode of the fourth LED lamp LED4, and a cathode of the first LED lamp LED1, a cathode of the second LED lamp LED2, a cathode of the third LED lamp LED3, and a cathode of the fourth LED lamp LED4 are connected to a negative power supply terminal B-of the second circuit board 20.
Based on the above embodiment, in combination with the first circuit board 10 and the second circuit board 20 of the separated power control device, the charging loop for charging the battery 30 is the positive input terminal of the USB interface-the power management chip U11-the sixth diode D6-the positive power supply B + of the first circuit board 10 to the negative power supply B of the second circuit board 20-to the fourth diode D4-the common electrode AGND of the second circuit board 20-the seventeenth resistor R17-the ground GND of the USB interface. In the charging loop, the voltage drop of the 5V power supply of the USB interface through the sixth diode D6 and the fourth diode D4 is 0.6V, and when the battery 30 is charged, the power supply is 4.4V, and the full charge of the battery 30 is generally 4.2V. In the scheme, the charging state of the battery 30 is judged according to the voltage drop generated by the current flowing through the seventeenth resistor R17, and when the power detection chip U3 works, whether the battery 30 is fully charged is judged according to the AD value of the detection end ANI of the power detection chip U3. When the current flowing through the seventeenth resistor R17 is small, the voltage drop generated across the seventeenth resistor R17 becomes small, and if the voltage drop across the seventeenth resistor R17 is smaller than the full charge threshold of the battery 30, it is determined that the battery 30 is fully charged.
When the voltage drop across the seventeenth resistor R17 is greater than the full threshold of the battery 30 during charging the battery 30, the second control terminal RED of the power detection chip U3 outputs a low signal to the RED indicator light RLED as the charging indication status. When the voltage across the seventeenth resistor R17 is less than the full-charge threshold of the battery 30, the second control terminal RED of the power detection chip U3 outputs a high-level signal to the RED indicator light RLED, and the RED indicator light RLED is turned off, and at this time, the first control terminal GREEN of the power detection chip U3 outputs a low-level signal to control the GREEN indicator light GLED, which is used as the full-charge state of the battery 30.
For the power management chip U11 of the charging management module 11, a chip of model ETA6027 is selected, and in the charging loop, because the sixth diode D6 and the fourth diode D4 have a voltage drop when the current is large, the linear charging management chip or the switch charging management chip in the related art has a problem that the battery 30 is not fully charged, and in the scheme, the power management chip of model ETA6027 can make the battery 30 be stably fully charged, thereby improving the reliability of the separated power control device.
Further, when the voltage drop across the seventeenth resistor R17 is detected to be lower than the full charge threshold, the power detection chip U3 performs the operation of the charge indicator, and outputs a low level signal to the power management chip U11 through the USB terminal of the power detection chip U3, at which time the charging of the battery 30 is stopped, so as to protect the battery 30 from being overcharged. The third resistor R3 and the thirtieth resistor R30 perform voltage division, the voltage division is a USB signal, when the power supply detection chip U3 is initially powered on, the USB end of the power supply detection chip U3 serves as an input end, whether a charging device is connected is judged, after the charging device is connected, the red indicator light RLED is controlled to be turned on, meanwhile, whether the voltage drop across the seventeenth resistor R17 is smaller than the full-charge threshold of the battery 30 is judged, if the voltage drop across the seventeenth resistor R17 is larger than the full-charge threshold of the battery 30, the USB end of the power supply detection chip U3 serves as an input end all the time, whether the charging device is. When the voltage is less than the full-charge threshold of the battery 30, the USB end of the power supply detection chip U3 is used as an output end, the power supply management chip U11 stops charging, the red indicator light RLED is turned off, the green indicator light GLED is turned on, the USB end of the power supply detection chip U3 is used as an input end at an interval of 2S, whether the charging device is disconnected or not is judged, if the USB end of the power supply detection chip U3 is used as an input end, when a low-level signal is detected, the charging device is considered to be disconnected, the green indicator light GLED is turned off, if the USB end of the power supply detection chip U3 is a high-level signal, the charging device is judged not to be disconnected, at the moment, the voltage drop on the seventeenth resistor R17 is judged again, if the voltage is less than the full-charge threshold of the battery 30, the green indicator light GLED is turned on, and if the voltage is greater than the.
Based on the above embodiment, when the battery 30 discharges, the first circuit board 10 and the second circuit board 20 can both keep working normally by connecting a power line between the common electrode of the first circuit board 10 and the common electrode of the second circuit board 20 for bidirectional power voltage transmission.
Referring to fig. 5 and 6, the second circuit board 20 does not have the power supply positive electrode B +, and has the common electrode AGND connected to the common electrode AGND of the first circuit board 10. The main control chip U6 on the second circuit board 20 can detect the voltage of the battery 30, and can control the first switch S1 and the second switch S2 on the second circuit board 20 to realize the flashing mode, the bright mode and the normally bright mode of the operating lamp LEDS on the first circuit board 10. The main control chip U6 of the second circuit board 20 can detect the first switch S1 and the second switch S2, and control the third switching tube Q3 according to the control signal output from the output terminal OUT of the main control chip U6, so as to control the operating mode of the operating lamp LEDS on the first circuit board 10. When the first switch S1 is switched to the normally-on mode, the output terminal OUT of the main control chip U6 outputs 200Khz with a duty ratio of 60% to control the third switch Q3, so that the common electrode AGND on the second circuit board 20 is switched between the positive power supply terminal B + and the negative power supply terminal B-. It can be understood that the voltage at the common electrode AGND on the second circuit board 20 and the power supply cathode B-is boosted to 3.3V through the voltage boost circuit composed of the sixth capacitor C6, the second inductor L2, the third voltage conversion chip U5, the third diode D3, the eighth capacitor C8, and the seventh capacitor C7 to supply power to the main control chip U6 on the second circuit board 20, so as to ensure that the main control chip U6 can continuously output the control signal through the output single OUT. At this time, the first circuit board 10 also has a power supply capability, and the voltage values existing at the positive electrode B + of the power supply and the common electrode AGND of the first circuit board 10 supply power to the power detection chip U3 of the first circuit board 10 through the voltage boost circuit, so that the power detection chip U3 controls the operating lamp LEDS. After the power detection chip U3 of the first circuit board 10 is powered on, it is determined whether a charging device is connected, if no charging device is connected, the power output terminal HVDD of the power detection chip U3 outputs a level signal to the constant current control chip U7, and after the constant current control chip U7 is powered on, the operating lamp LEDS is controlled to operate and maintain a constant current.
Further, by controlling the main control chip U6 and the second switch S2 on the second circuit board 20, when the duty ratio of the PWM signal is changed to 20%, the third switch Q3 is turned on for a long time and turned off for a short time, so that the first circuit board 10 is powered off once, thereby implementing the flashing mode of the led lamp on the first circuit board 10. By controlling the main control chip U6 and the first switch S1 on the second circuit board 20, when the PWM signal is changed to 40%, due to the characteristics of the third switching tube, the voltages at the two ends of the common electrode AGND and the power supply cathode B-on the second circuit board 20 will increase, while the voltages at the power supply anode B + and the common electrode AGND on the first circuit board 10 will decrease to a certain extent, and the second voltage conversion chip U4 will decrease the power supply capability of the power supply detection chip due to insufficient power supply capability, and will decrease the power supply voltage of the work light LEDS, so that the brightness of the work light LEDS will become dark.
In the above embodiment, the indication of the power of the battery 30 by the power indication module is to perform voltage division detection by connecting the twelfth resistor R12 and the thirteenth resistor R13 of the voltage division resistor through the positive terminal BAT of the battery 30 of the main control chip U6, where one end of the voltage division resistor is the common electrode AGND of the second circuit board 20, and the other end is the negative electrode B-of the power supply of the second circuit board 20. When the separate power control device is in the sleep state, it can be seen through the first circuit board 10 that the voltage of the common electrode AGND of the first circuit board 10 is connected from the eighth resistor R8 and the first switch Q1 to the positive power supply electrode B + of the first circuit board 10. Because the voltage drop exists between the eighth resistor R8 and the first switch tube Q1, the voltage drop of the first switch tube Q1 and the voltage drop of the eighth resistor R8 are ensured to be disposable, compensation is made on software, and the voltage of the battery 30 is judged by reading multiple AD values and averaging, so that the accuracy of voltage detection of the battery 30 is improved.
It should be noted that the power management chip U11 in the above embodiment may be a chip with a model number of ETA6027, the power detection chip U3 may be a chip with a model number of AS253-8A/SOP8, the main control chip U6 may be a chip with a model number of AS255-16A/SOP16, the constant current control chip U7 may be a chip with a model number of ME7136BM5G/SOT23-5, the first voltage conversion chip U2 may be a chip with a model number of B3PXXC/SOT89, and the second voltage conversion chip U4 and the third voltage conversion chip U5 may be chips with a model number of ME2188A33M3/SOT 23-3.
The invention also provides a flashlight which comprises the separated power supply control device, wherein the separated power supply control device comprises a first circuit board 10, a second circuit board 20 and a battery 30;
the first circuit board 10 is provided with a USB interface, a power supply positive pole B + and a common pole, the second circuit board 20 is provided with a power supply negative pole B-and a common pole, the battery 30 is provided with a positive pole and a negative pole, the USB interface of the first circuit board 10 is connected with a charging device, the power supply positive pole B + of the first circuit board 10 is connected with the positive pole of the battery 30, and the power supply negative pole B-of the second circuit board 20 is connected with the negative pole of the battery 30;
a power line is connected between the common pole of the first circuit board 10 and the common pole of the second circuit board 20 to control the normal power supply of the first circuit board 10 and the second circuit board 20.
The specific structure of the separate power control device refers to the above embodiments, and since the flashlight adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
It can be understood that the separated power supply control device in the present solution is not limited to be applied to the flashlight, but may be a small electronic device requiring separated power supply control according to actual situations.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the specification and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (8)

1. A separated power supply control device is characterized by comprising a first circuit board, a second circuit board and a battery;
the first circuit board is provided with a USB interface, a power supply anode and a common electrode, the second circuit board is provided with a power supply cathode and a common electrode, the battery is provided with an anode and a cathode, the USB interface of the first circuit board is connected with a charging device, the power supply anode of the first circuit board is connected with the anode of the battery, and the power supply cathode of the second circuit board is connected with the cathode of the battery;
a power line is connected between the common pole of the first circuit board and the common pole of the second circuit board to control the normal power supply of the first circuit board and the second circuit board;
the second circuit board comprises a boosting module, a main control circuit and an electric quantity indicating module;
the input end of the boosting module is a common electrode of the second circuit board, the output end of the boosting module is connected with the input end of the main control circuit, and the output end of the main control circuit is connected with the electric quantity indicating module;
the boosting module is used for boosting the input power supply voltage to supply power to the main control circuit;
the main control circuit is used for controlling the electric quantity indicating module to indicate the electric quantity of the battery and outputting a PWM signal to control the switching of the working mode of the working lamp;
the main control circuit comprises a main control chip, a first switch and a second switch;
the first switch is a single-pole double-throw switch, a first end and a second end of the first switch are respectively connected to the main control chip, a first end of the second switch is connected to the main control chip, and a third end of the first switch is connected with a second end of the second switch and is a power supply cathode of the second circuit board;
the first switch and the second switch are used for controlling the working lamp to be switched into an explosion flashing mode, a normally bright mode or a slightly bright mode under the control of the main control chip.
2. The separated power supply control device according to claim 1, wherein the first circuit board comprises a charging management module, a power supply judgment module and a charging state indication module;
the input end of the charging management module is connected with the USB interface, the output end of the charging management module is connected with the battery and is the power supply anode of the first circuit board, the detection end of the power supply judgment module is electrically connected with the charging management module, and the output end of the power supply judgment module is electrically connected with the charging state indication module;
the charging management module is used for converting the input power supply voltage to output the input power supply voltage to the battery;
and the power supply judging module is used for judging the charging state of the battery and controlling the charging state indicating module to display the charging state of the battery.
3. The split power control device as claimed in claim 2, wherein the charging management module comprises a first resistor, a thirtieth resistor, a third resistor, a second capacitor, a sixth diode and a power management chip;
the first end of the first resistor is connected with the adjusting end of the power management chip, the second end of the first resistor is grounded with the common end of the second end of the thirty-second resistor and is a common pole of the first circuit board, the common ends of the first end of the thirty-second resistor and the second end of the third resistor are connected with the enabling end of the power management chip, the first end of the third resistor is connected with the input end of the power management chip, the output end of the power management chip, the first end of the second capacitor and the anode of the sixth diode are connected with each other, the second end of the second capacitor is grounded, and the cathode of the sixth diode is the positive power supply pole of the first circuit board.
4. The split power control device as claimed in claim 3, wherein the power management chip is model number ETA 6027.
5. The separated power supply control device as claimed in claim 3, wherein the power supply judging module comprises a power supply detecting chip, a ninth resistor, a seventeenth resistor and a seventeenth capacitor;
the power supply detection chip comprises a detection end and a USB end, the USB end of the power supply detection chip is connected with the enabling end of the power supply management chip, the first end of the ninth resistor and the common end of the first end of the seventeenth capacitor are connected with the detection end of the power supply detection chip, the second end of the seventeenth capacitor and the common end of the first end of the seventeenth resistor are grounded, and the second end of the ninth resistor and the common end of the second end of the seventeenth resistor are the common electrode of the first circuit board.
6. The split power control device as claimed in claim 5, wherein the charge status indication module comprises a twenty-first resistor, a twenty-second resistor, a green indicator light and a red indicator light;
the power detection chip further comprises a first control end and a second control end, the first control end of the power detection chip is connected with the first end of the twenty-first resistor, the second end of the twenty-first resistor is connected with the cathode of the green indicator lamp, the second control end of the power detection chip is connected with the first end of the twenty-second resistor, the second end of the twenty-second resistor is connected with the cathode of the red indicator lamp, and the anode of the green indicator lamp and the public end of the anode of the red indicator lamp are power ends.
7. The split power supply control device as claimed in claim 1, wherein the power indication module comprises a plurality of LED lamps, anodes of the plurality of LED lamps are respectively connected to the main control chip, and cathodes of the plurality of LED lamps are commonly connected to a power supply cathode of the second circuit board.
8. A flashlight including a separate power control device as claimed in any one of claims 1 to 7.
CN202010847000.0A 2020-08-21 2020-08-21 Disconnect-type power control device and flashlight Active CN111741571B (en)

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