CN113490301A - Output current control circuit, system and method - Google Patents

Output current control circuit, system and method Download PDF

Info

Publication number
CN113490301A
CN113490301A CN202110748477.8A CN202110748477A CN113490301A CN 113490301 A CN113490301 A CN 113490301A CN 202110748477 A CN202110748477 A CN 202110748477A CN 113490301 A CN113490301 A CN 113490301A
Authority
CN
China
Prior art keywords
output current
current control
preset
electrically connected
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110748477.8A
Other languages
Chinese (zh)
Inventor
周明杰
阮云燎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Haiyangwang Petroleum Lighting Technology Co ltd
Oceans King Lighting Science and Technology Co Ltd
Oceans King Dongguan Lighting Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Shenzhen Haiyangwang Petroleum Lighting Technology Co ltd
Oceans King Lighting Science and Technology Co Ltd
Oceans King Dongguan Lighting Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Haiyangwang Petroleum Lighting Technology Co ltd, Oceans King Lighting Science and Technology Co Ltd, Oceans King Dongguan Lighting Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Shenzhen Haiyangwang Petroleum Lighting Technology Co ltd
Priority to CN202110748477.8A priority Critical patent/CN113490301A/en
Publication of CN113490301A publication Critical patent/CN113490301A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • 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
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • 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
    • H05B45/37—Converter circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention belongs to the technical field of current control, and provides an output current control circuit, a system and a method, wherein the output current control circuit comprises: the power supply comprises a power supply input end, a first filtering module, a power supply management module, a second filtering module and a voltage regulating module; the power supply input end is respectively and electrically connected with an external power supply and the first filtering module; the first filtering module is electrically connected with the power management module; the power supply management module is also electrically connected with the second filter circuit and the voltage regulation module; the second filter circuit is also electrically connected with the voltage regulation module. The invention can improve the working efficiency and stability of the output current control circuit.

Description

Output current control circuit, system and method
Technical Field
The invention belongs to the technical field of current control, and particularly relates to an output current control circuit, system and method.
Background
In the prior art, a circuit with output current control management is easily limited by an input end, for example, the battery capacity of the input end is insufficient, and the using environment is severe and has much interference. Once the flashlight is used in a severe and easily interfered environment, the working efficiency of the driver is reduced, and even the driver cannot be used normally. It can be seen that the existing output current control and management circuit has the problems of low working efficiency and poor stability.
Disclosure of Invention
The invention provides an output current control circuit, aiming at solving the problems of low working efficiency and poor stability of the existing output current control management circuit.
The present invention is achieved as such, and provides an output current control circuit including: the power supply comprises a power supply input end, a first filtering module, a power supply management module, a second filtering module and a voltage regulating module; the power supply input end is respectively and electrically connected with an external power supply and the first filtering module; the first filtering module is electrically connected with the power management module; the power supply management module is also electrically connected with the second filter circuit and the voltage regulation module; the second filter circuit is also electrically connected with the voltage regulation module.
Furthermore, the voltage regulation module comprises a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1, an LED lamp and a current output end;
resistance R1's one end electricity is connected the first output of power management module, resistance R1's the other end electricity is connected respectively resistance R2 with resistance R3's one end, resistance R2's other end electricity is connected ground, resistance R3's one end is still connected the source electrode of MOS pipe, resistance R3's the other end electricity is connected the second output of power management module and MOS pipe Q1's grid, MOS pipe Q1's drain electrode with the LED lamp electricity is connected, the LED lamp with the current output end electricity is connected.
Furthermore, the first filtering module includes a capacitor C1, one end of the capacitor C1 is electrically connected to the external power source and to the first input terminal of the power management module, and the other end of the capacitor C1 is electrically connected to the second input terminal of the power management module.
Furthermore, the second filtering module includes a capacitor C2, one end of the capacitor C2 is electrically connected to the connection line between the first output terminal of the power management module and the resistor R2, and the other end of the capacitor C2 is grounded.
The embodiment of the invention also provides an output current control system, which comprises a driving circuit, a key and electric quantity display circuit, a lighting device, an indicator lamp, a charging interface and the output current control circuit;
the driving circuit is respectively electrically connected with the key, the electric quantity display circuit, the lighting equipment, the output current control circuit and the charging interface;
the indicator light is electrically connected with the output current control circuit.
The embodiment of the invention also provides an output current control method, which comprises the following steps:
acquiring a preset current value, wherein the preset current value changes according to a preset gradual-down mode;
and adjusting the output current according to the preset current value.
Still further, the method further comprises:
completing system initialization;
judging whether a starting signal is received or not, and if the starting signal is received, executing the step of obtaining a preset current value;
if the starting signal is not received, the step of completing the system initialization is repeatedly executed.
Further, the step of adjusting the output current according to the preset current value includes:
performing analog-to-digital conversion on the preset current value to obtain a current digital signal corresponding to the preset current value;
and outputting a corresponding feedback signal according to the current digital signal, and adjusting the output current according to the feedback signal.
Still further, the step of obtaining the preset current value includes:
and reading the preset current value from a preset register, wherein the preset current value is stored in the preset register.
Still further, the method further comprises:
and sending the regulated output current to a display device for displaying.
The invention achieves the following beneficial effects: through presetting the management to the electric current between input/output end to the output current who realizes the rear end can realize according to presetting the mode of falling gradually and realize falling gradually, thereby realizes that the highlight slowly excessively reaches the low light according to the highlight, with the optical demand that adapts to people's eye. And further improve the work efficiency and stability of the output current control circuit.
Drawings
FIG. 1 is a block diagram of an output current control circuit according to the present invention;
FIG. 2 is a circuit diagram of an output current control circuit according to the present invention;
FIG. 3 is a block diagram of an output current control system provided by the present invention;
fig. 4 is a flowchart of an output current control method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiment of the invention, the current is preset and managed between the input end and the output end, so that the output current at the rear end can be gradually reduced according to a preset gradual reduction mode, and strong light is slowly transited to weak light according to strong light so as to adapt to the optical requirements of human eyes. And further improve the work efficiency and stability of the output current control circuit.
Example one
Referring to fig. 1, fig. 1 is a block diagram of an output current control circuit according to the present invention.
The output current control circuit 7 includes: the power supply comprises a power supply input end 1, a first filtering module 2, a power supply management module 3, a second filtering module 4 and a voltage regulating module 5; the power input end 1 is electrically connected with an external power supply and the first filtering module 2 respectively; the first filtering module 2 is electrically connected with the power management module 3; the power management module 3 is also electrically connected with the second filter circuit and the voltage regulation module 5; the second filter circuit is also electrically connected with the voltage regulating module 5.
Wherein, the external power supply supplies power for 18650 or 26650 lithium batteries. The first filtering module 2 is configured to filter a dc voltage of an external power supply, so that a voltage signal reaching the power management module 3 is a stable dc voltage signal.
The power management module 3 is a control center of the whole output current control circuit 7, and is configured to control a gradual decrease adjustment function of the output current according to a preset program. The starting and working voltages of the power management module 3 are provided by an external power supply, and the power consumption of the power management module 3 is low, so that the heat productivity of the whole module is small. The efficiency of the entire output current control circuit 7 is high. The external power supply forms an enabling signal of the power management module 3 at the same time and is controlled by the single chip microcomputer.
The second filtering module 4 is used for filtering out noise ripple current which may appear at the output terminal. It is ensured that an extremely stable output voltage signal arrives at the power management module 3.
The voltage regulating module 5 is used for regulating the output current.
In the embodiment of the present invention, as shown in fig. 2, the voltage regulating module 5 includes a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1, an LED lamp, and a current output terminal 6. Resistance R1's one end electricity is connected power management module 3's first output, resistance R1's the other end electricity is connected respectively resistance R2 with resistance R3's one end, resistance R2's other end electricity is connected ground, resistance R3's one end is still connected the source electrode of MOS pipe, resistance R3's the other end electricity is connected power management module 3's second output and MOS pipe Q1's grid, MOS pipe Q1's drain electrode with the LED lamp electricity is connected, the LED lamp with current output 6 electricity is connected.
Specifically, the voltage across the LED lamp is initially stable, i.e., the operating current of the LED lamp is a constant current value, and is fixed. Along with the lapse of preset time, the voltage at two ends of the LED lamp drops, and the second output end (pin 5) feeds back the working state of the MOS transistor Q1 to adjust the voltage at two ends of the LED lamp, so as to gradually drop. The change is made according to a preset gradual-down mode set by a program.
In the embodiment of the present invention, as shown in fig. 2, the first filtering module 2 includes a capacitor C1, one end of the capacitor C1 is electrically connected to the external power source and is electrically connected to the first input terminal of the power management module 3, and the other end of the capacitor C1 is electrically connected to the second input terminal of the power management module 3.
Specifically, the dc voltage received by the input terminal of the power management module 3 passes through the capacitor C1, and the capacitor C1 mainly plays a role of filtering, so as to filter noise components in the dc voltage, so that the voltage signal reaching the power management module 3 is a stable dc signal. After the voltage reaches the power management module 3, the power management module 3 processes the voltage, controls the voltage of the PWM output to the first output end (pin 4) and the second output end (pin 5) of the power management module 3 through a preset program, and then transmits the voltage to the voltage regulation module 5, so as to realize output current regulation.
In the embodiment of the present invention, as shown in fig. 2, the second filtering module 4 includes a capacitor C2, one end of the capacitor C2 is electrically connected to the connection line between the first output terminal of the power management module 3 and the resistor R2, and the other end of the capacitor C2 is grounded.
Specifically, the capacitor C2 is a simple filter circuit for filtering out noise ripple current that may appear at the first output terminal of the power management module 3. It is ensured that an extremely stable output voltage signal arrives at the power management module 3.
In the embodiment of the invention, the current is preset and managed between the input end and the output end, so that the output current at the rear end can be gradually reduced according to a preset gradual reduction mode, and strong light is slowly transited to weak light according to strong light so as to adapt to the optical requirements of human eyes. Thereby improving the working efficiency and stability of the output current control circuit 7.
Example two
As shown in fig. 3, an embodiment of the present invention further provides an output current control system, which includes a driving circuit 10, a key and electric quantity display circuit 9, an illumination device 8, an indicator light 12, a charging interface 11, and the output current control circuit 7 provided in the above embodiments. The driving circuit 10 is electrically connected to the button and electric quantity display circuit 9, the lighting device 8, the output current control circuit 7, and the charging interface 11, respectively. The indicator lamp 12 is electrically connected to the output current control circuit 7.
Specifically, the driving circuit 10 includes a controller, such as a single chip. The button and power display circuit 9 includes a button circuit and a power display circuit. The control of the output current control system can be facilitated for users through the key circuit. The electric quantity display circuit is used for inquiring and displaying the electric quantity of the output current control system. The lighting device 8 may be a flashlight, a lamp, or the like. The indicator light 12 plays a role of indication. The charging interface 11 is used for charging the output current control system.
In the embodiment of the present invention, the lighting device 8, the indicator lamp 12, and the like are powered through the output current control circuit 7. So that the lighting device 8 can operate stably and efficiently. For example, the lighting device 8 may be an explosion-proof strong light working lamp, and the efficient power management control is really realized in an explosion-proof complex environment, so that the portable and high-brightness working effect of the lamp is achieved.
EXAMPLE III
As shown in fig. 4, an embodiment of the present invention further provides an output current control method, where the method includes:
step 101, obtaining a preset current value, wherein the preset current value changes according to a preset gradual-down mode.
In the embodiment of the present invention, step 101 includes: and reading the preset current value from a preset register, wherein the preset current value is stored in the preset register.
Specifically, the preset current value is preset and stored in a register. The preset gradual-down mode is a preset current gradual-down mode, for example, a current corresponding to strong light is decreased to a current gradual-down process corresponding to weak light according to a certain current value. This can achieve a slow transition from bright light to dim light to accommodate the optical requirements of the human eye.
And step 102, adjusting the output current according to the preset current value.
In an embodiment of the present invention, step 102 includes: the step of adjusting the output current according to the preset current value comprises the following steps: and carrying out analog-to-digital conversion on the preset current value to obtain a current digital signal corresponding to the preset current value. And outputting a corresponding feedback signal according to the current digital signal, and adjusting the output current according to the feedback signal.
The feedback signal may be a feedback voltage signal. Specifically, since the preset current value is changed according to the preset gradual-down mode, when the output current is adjusted according to the acquired preset current over time, the output current is also changed according to the preset gradual-down mode. Therefore, the output current can be adjusted through a preset gradual-down mode, so that the output current of the output end is extremely fine, and the accuracy of the output current can reach 5 mA.
In an embodiment of the present invention, the method further comprises:
and completing system initialization. In particular, initializing the system can facilitate regulation of the output current.
And judging whether a starting signal is received or not, and if the starting signal is received, executing the step of obtaining the preset current value. If the starting signal is not received, the step of completing the system initialization is repeatedly executed.
Specifically, the start signal may be a switching signal, and when the output current needs to be controlled, the start signal needs to be triggered, so that the output current control circuit works to complete the control of the output current. Of course, if the start signal is not received, it is described that the output current does not need to be controlled, and the initialization state is maintained.
In an embodiment of the present invention, the method further comprises: and sending the regulated output current to a display device for displaying. Specifically, the regulated output current is displayed on a display device. The user can intuitively know the magnitude of the output current corresponding to the brightness of the controlled lamp. Thereby meeting the requirements of users on brightness.
In the embodiment of the invention, by acquiring a preset current value, the preset current value changes according to a preset gradual-down mode; and adjusting the output current according to the preset current value. Therefore, the output current can be regulated and managed in a preset gradual-falling mode according to the preset current value, so that the output current is extremely fine, and the working efficiency and the stability of the output current control circuit are improved. Therefore, the light equipment slowly changes from strong light to weak light so as to adapt to the optical requirements of human eyes.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An output current control circuit, comprising: the power supply comprises a power supply input end, a first filtering module, a power supply management module, a second filtering module and a voltage regulating module;
the power supply input end is respectively and electrically connected with an external power supply and the first filtering module;
the first filtering module is electrically connected with the power management module;
the power supply management module is also electrically connected with the second filter circuit and the voltage regulation module;
the second filter circuit is also electrically connected with the voltage regulation module.
2. The output current control circuit of claim 1, wherein the voltage regulating module comprises a resistor R1, a resistor R2, a resistor R3, a MOS transistor Q1, an LED lamp and a current output terminal;
resistance R1's one end electricity is connected the first output of power management module, resistance R1's the other end electricity is connected respectively resistance R2 with resistance R3's one end, resistance R2's other end electricity is connected ground, resistance R3's one end is still connected the source electrode of MOS pipe, resistance R3's the other end electricity is connected the second output of power management module and MOS pipe Q1's grid, MOS pipe Q1's drain electrode with the LED lamp electricity is connected, the LED lamp with the current output end electricity is connected.
3. The output current control circuit of claim 2, wherein the first filtering module comprises a capacitor C1, one end of the capacitor C1 is electrically connected to the power input and to the first input of the power management module, and the other end of the capacitor C1 is electrically connected to the second input of the power management module.
4. The output current control circuit of claim 3, wherein the second filtering module comprises a capacitor C2, one end of the capacitor C2 is electrically connected to the connection line between the first output terminal of the power management module and the resistor R2, and the other end of the capacitor C2 is grounded.
5. An output current control system, characterized by comprising a driving circuit, a key and electric quantity display circuit, a lighting device, an indicator light, a charging interface and the output current control circuit of any one of claims 1 to 4;
the driving circuit is respectively electrically connected with the key, the electric quantity display circuit, the lighting equipment, the output current control circuit and the charging interface;
the indicator light is electrically connected with the output current control circuit.
6. An output current control method, characterized in that the method comprises the steps of:
acquiring a preset current value, wherein the preset current value changes according to a preset gradual-down mode;
and adjusting the output current according to the preset current value.
7. The output current control method according to claim 6, characterized in that the method further comprises:
completing system initialization;
judging whether a starting signal is received or not, and if the starting signal is received, executing the step of obtaining a preset current value;
if the starting signal is not received, the step of completing the system initialization is repeatedly executed.
8. The output current control method according to claim 6, wherein the step of adjusting the output current according to the preset current value comprises:
performing analog-to-digital conversion on the preset current value to obtain a current digital signal corresponding to the preset current value;
and outputting a corresponding feedback signal according to the current digital signal, and adjusting the output current according to the feedback signal.
9. The output current control method according to claim 6, wherein the step of obtaining the preset current value comprises:
and reading the preset current value from a preset register, wherein the preset current value is stored in the preset register.
10. The output current control method according to claim 6, characterized in that the method further comprises:
and sending the regulated output current to a display device for displaying.
CN202110748477.8A 2021-07-02 2021-07-02 Output current control circuit, system and method Pending CN113490301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110748477.8A CN113490301A (en) 2021-07-02 2021-07-02 Output current control circuit, system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110748477.8A CN113490301A (en) 2021-07-02 2021-07-02 Output current control circuit, system and method

Publications (1)

Publication Number Publication Date
CN113490301A true CN113490301A (en) 2021-10-08

Family

ID=77940239

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110748477.8A Pending CN113490301A (en) 2021-07-02 2021-07-02 Output current control circuit, system and method

Country Status (1)

Country Link
CN (1) CN113490301A (en)

Similar Documents

Publication Publication Date Title
CN109066940B (en) Charging control method, circuit, charger and electric tool
CN107069927B (en) Power supply unit and lighting system
CN110492554B (en) Adjustment control circuit, bluetooth headset, charging box and charging system
CN111601422B (en) Starting circuit and electronic equipment
CN205160851U (en) Two unification powers
CN204648088U (en) A kind of intelligent dimming LED desk lamp of removable use
CN216357392U (en) Output current control circuit and system
CN203352252U (en) Intelligent mobile power supply device
CN206149156U (en) But electric vehicle charger change over switch control source
CN113490301A (en) Output current control circuit, system and method
CN212115163U (en) Control circuit for OEMS
CN111371094B (en) Double-power-supply system and television
CN212970169U (en) Desk lamp control circuit with multiple control modes
CN211089206U (en) Linear adjustable power converter based on PD protocol
CN208224754U (en) ASIC integrated circuit, the control circuit of electronic cigarette and electronic cigarette
CN113162160A (en) Control circuit, charging circuit and electronic equipment
CN207251284U (en) Power supply unit and lighting system
CN220156251U (en) Direct current power supply boost current-limiting conversion circuit
CN111082496A (en) Linear adjustable power converter based on PD (proportion integration) protocol and charging method
CN215379285U (en) Intelligent lamp with adjustable color temperature and brightness controlled by RFID (radio frequency identification) remote control and Bluetooth
CN220067744U (en) LED lamp charging circuit
CN219780444U (en) Stroboscopic-prevention LED driving circuit and LED lamp
CN213152435U (en) Wide removal lighting circuit of application scope
CN219760672U (en) Laser control circuit adapting to multiple-specification input battery and laser sighting telescope
WO2023246413A1 (en) System control circuit, indication assembly, and electronic atomization apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination