CN213938373U

CN213938373U - Moonlight brightness level dimming circuit for LED (light emitting diode) highlight flashlight of mobile lighting equipment

Info

Publication number: CN213938373U
Application number: CN202022571648.8U
Authority: CN
Inventors: 鄢遍
Original assignee: Dongguan Aolei Mobile Lighting Equipment Co Ltd
Current assignee: Dongguan Aolei Mobile Lighting Equipment Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-08-10
Anticipated expiration: 2030-11-09

Abstract

The utility model relates to a mobile lighting equipment adjustting of lighteness technical field specifically is for being used for mobile lighting equipment LED highlight flashlight moonlight luminance shelves dimmer circuit, including the constant voltage source circuit, outer loop control circuit, 2.5V constant voltage source circuit and the main control circuit that step up that are used for adjusting high bright shelves, well bright shelves and low bright shelves, still include charge pump boost circuit and the constant current circuit that are used for adjusting moonlight luminance shelves, the utility model discloses can realize the regulation of the high-low gear of LED highlight flashlight, and still can realize the adjustting of lighteness to moonlight shelves to make it maintain at 1 mA.

Description

Moonlight brightness level dimming circuit for LED (light emitting diode) highlight flashlight of mobile lighting equipment

Technical Field

The utility model relates to a mobile lighting device adjustting of lighteness technical field specifically is for being used for mobile lighting device LED highlight flashlight moonlight luminance shelves dimmer circuit.

Background

The existing LED highlight flashlight has the general dimming mode with ultrahigh brightness and endurance requirements, namely a high brightness gear, a medium brightness gear, a low brightness gear and a moonlight gear, different brightness switching is realized by controlling different currents flowing on an LED lamp bead, the high brightness gear is 100% of current, the medium brightness gear is 50% of current, the low brightness gear is 5% of current, and the moonlight gear is 1mA or less in current. When the LED strong light flashlight with the LED current exceeding 3A is used, the constant current of the LED current can not be accurately adjusted to be 1mA through PWM. In view of this, we propose a dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device.

SUMMERY OF THE UTILITY MODEL

In order to compensate the above deficiency, the utility model provides a be used for removing lighting apparatus LED highlight flashlight moonlight luminance shelves dimmer circuit.

The technical scheme of the utility model is that:

the dimming circuit for the moonlight brightness level of the LED highlight flashlight for the mobile lighting equipment comprises a boosting constant-voltage source circuit, an outer ring control circuit, a 2.5V constant-voltage source circuit and a main control circuit, wherein the boosting constant-voltage source circuit is used for adjusting a high brightness level, a middle brightness level and a low brightness level, and the dimming circuit further comprises a charge pump boosting circuit and a constant-current circuit which are used for adjusting the moonlight brightness level.

As the utility model discloses preferred technical scheme, BOOST constant voltage source circuit comprises control chip U1, power inductance L1, switch, MOS pipe Q1, MOS pipe Q3 and the electric capacity and the resistance components of connecting on every side, and wherein, control chip U1's model is SC8201, connects and controls according to synchronous BOOST circuit mode.

As a preferred technical solution of the present invention, the outer ring control circuit is composed of U3A and a capacitor and a resistor connected around the capacitor and the resistor, wherein the model of U3A is TLV 333.

As the preferred technical scheme of the utility model, 2.5V constant voltage power supply circuit comprises Q2 and the electric capacity and the resistance components and parts of connecting on every side, and wherein, the model of Q2 is BL 8503-2.5.

As a preferred technical solution of the present invention, the main control circuit is composed of U2, a button S1, an indicator light D5, a temperature detection circuit R29, an RT1, and electric quantity detection circuits R25 and R28, wherein the model of U2 is SC92F 8003.

As the preferred technical scheme of the utility model, charge pump step-up circuit comprises four components and parts of U13, C25, C26 and D6, and wherein U13's model is LM2765, and its input termination battery positive pole, its output are the constant current circuit power supply.

As the utility model discloses preferred technical scheme, the constant current circuit comprises two PNP symmetrical triodes of U12, U12 internal integration, the external resistance R30 and the R31 of being connected with the triode, and wherein, U12's model is MBT 3906.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses can realize the regulation of high low gear of LED highlight flashlight, and still can realize the adjustting of the lighteness to the moonlight shelves to make it maintain at 1 mA.

Drawings

Fig. 1 is a circuit diagram of a boost constant voltage source of the present invention;

FIG. 2 is a circuit diagram of the outer ring control circuit of the present invention;

fig. 3 is a circuit diagram of a 2.5V constant voltage source of the present invention;

FIG. 4 is a main control circuit diagram of the present invention;

fig. 5 is a circuit diagram of the charge pump boost circuit of the present invention;

fig. 6 is a constant current circuit diagram of the present invention.

In the figure: equipment shell 1, feedstock channel 2, cutter groove 3, cutter 4, connecting axle 5, chip groove 6, level separate net 7, semi-circular net 8 that separates, collecting box standing groove 9, fan 10, collecting box 11, handle 12, motor protective housing 13, louvre 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1-6, the present invention provides a technical solution:

Preferably, the BOOST constant voltage source circuit is composed of a control chip U1, a power inductor L1, a switch, a MOS transistor Q1, a MOS transistor Q3, and a capacitor and a resistor connected around the control chip U1, wherein the control chip U1 is of a type SC8201, and is connected and controlled in a synchronous BOOST circuit manner, and the BOOST constant voltage source circuit mainly functions to BOOST a voltage of 3V to 4.2V provided by a battery to a fixed voltage value, and the fixed voltage value is adjusted by a circuit composed of U1, U2, and U3A.

Preferably, the outer ring control circuit is composed of U3A and capacitors and resistor components connected around, wherein the model of U3A is TLV333, the outer ring control circuit receives the PWM signal of P1.3 from U2 and compares the PWM signal with the input end of the LED serving as the operational amplifier U3A, and the output signal enters the U1 through the FB port of the loop control output signal, so as to control the output voltage and current, and enable the output LED + and the LED + to have constant current.

Preferably, the 2.5V constant-voltage power supply circuit is composed of Q2, and a capacitor and a resistor connected around the Q2, wherein the model of Q2 is BL8503-2.5, and the 2.5V constant-voltage power supply circuit provides a constant-voltage power supply for the MCU.

Preferably, the main control circuit is composed of a U2, a key S1, an indicator light D5, temperature detection circuits R29 and RT1 and electric quantity detection circuits R25 and R28, wherein the model of the U2 is SC92F8003, and a PWM pin of the U2 outputs a PWM square wave to adjust the level of an inverted input end of the U3A, so that the current of the LED light is controlled, and the actual brightness of the flashlight is adjusted.

Preferably, the charge pump boost circuit is composed of four components, i.e., U13, C25, C26 and D6, wherein U13 is LM2765, its input end is connected to the positive electrode of the battery, its output end is supplied with power by the constant current circuit, and the voltage of the input BAT + can be increased by 2 times, i.e., from the original 3V-4.2V to 6V-8.4V.

Preferably, the constant current circuit is formed by integrating two PNP symmetrical triodes inside U12 and U12 and external resistors R30 and R31 connected to the triodes, wherein the model of U12 is MBT3906, an output current is obtained by dividing an emitter junction conducting voltage of an NPN second triode (pin 4, pin 5 and pin 6) connected in series in U12 by a value of a resistor R30, and a constant current of 0.001A is output in the circuit. The scheme is applied to the input of a single lithium battery, the input voltage range is 3-4.2V, the output brightness of the output voltage of 6V is designed to be 4 grades, wherein the high bright grade 6A current is 4000 lumen brightness, the middle bright grade 3A current is 2200 lumen brightness, the low bright grade is 0.3A current is 270 lumen brightness, the moonlight grade is 0.001A internal current, and the brightness is 2-lumen brightness.

The utility model discloses a be used for removing lighting apparatus LED highlight flashlight moonlight luminance shelves dimmer circuit when using, the outside electric current ring of putting the constitution through MCU output PWM square wave and TLV333 high accuracy fortune adjusts luminance, under moonlight shelves mode, MCU makes earlier that the ability P1.7(/ CE) foot is drawn high to 2.5V, turn-off master control DC-DC chip U1(SC6201), it draws down to 0V to enable P2.1(MOON) foot again, open charge pump chip U13(LM2765), charge pump U13's No. 5 (OUT) foot output is twice the voltage of input (input battery voltage is 3V-4.2V, the output is 6V-8.4V), the constant current source that rethread U12 constitutes, output 0.001A gives LED +, lights LED lamp pearl.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A constant voltage source circuit, outer loop control circuit, 2.5V constant voltage source circuit and main control circuit that are used for removing lighting apparatus LED highlight flashlight moonlight luminance shelves dimmer circuit, including being used for adjusting high bright shelves, well bright shelves and the low bright shelves step up, its characterized in that: the device also comprises a charge pump boosting circuit and a constant current circuit which are used for adjusting the moonlight brightness level.

2. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the boosting constant-voltage power supply circuit is composed of a control chip U1, a power inductor L1, a switch, an MOS tube Q1, an MOS tube Q3, and a capacitor and a resistor element which are connected around the control chip U1, wherein the type of the control chip U1 is SC8201, and the control chip U1 is connected and controlled in a synchronous BOOST circuit mode.

3. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the outer loop control circuit is composed of U3A and capacitor and resistance components connected around, wherein the model number of U3A is TLV 333.

4. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the 2.5V constant-voltage power supply circuit is composed of Q2 and a capacitor and a resistor element which are connected with the periphery of the circuit, wherein the model of Q2 is BL 8503-2.5.

5. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the main control circuit is composed of a U2, a key S1, an indicator light D5, temperature detection circuits R29 and RT1 and electric quantity detection circuits R25 and R28, wherein the model of the U2 is SC92F 8003.

6. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the charge pump booster circuit is composed of four components of U13, C25, C26 and D6, wherein the model of U13 is LM2765, the input end of the U is connected with the anode of a battery, and the output end of the U is used for supplying power for the constant current circuit.

7. The dimming circuit for the moonlight level of an LED glare flashlight for a mobile lighting device of claim 1, wherein: the constant current circuit comprises U12, U12 internal integration two PNP symmetrical triode, external resistance R30 and R31 be connected with the triode, and wherein, the model of U12 is MBT 3906.