CN212231765U

CN212231765U - Electronic goods shelves label three-colour LED power supply circuit

Info

Publication number: CN212231765U
Application number: CN202021010718.6U
Authority: CN
Inventors: 向佐英
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-12-25
Anticipated expiration: 2030-06-05

Abstract

The utility model provides an electronic shelf label three-colour LED power supply circuit, including switch circuit unit, boost circuit unit and three-colour LED lamp drive circuit unit, switch circuit unit connects boost circuit unit, boost circuit unit is connected with three-colour LED lamp drive circuit unit. Implement the utility model discloses an electronic shelf label three-colour LED power supply circuit rises 3V DC voltage to direct current 4.15V and supplies power for three-colour LED and active buzzer, and work efficiency is high, and does not influence the normal work of other circuit system of electronic shelf label.

Description

Electronic goods shelves label three-colour LED power supply circuit

Technical Field

The utility model relates to an electronic tags technical field, in particular to electronic shelf label three-colour LED supply circuit.

Background

Electronic shelf labels usually adopt button batteries or other 3V dry batteries to directly supply power to a system, but the XT1511-2427 three-color LED lamp normally works only when the voltage is 3.5V-5.5V, so a booster circuit must be added to boost the direct current 3V voltage to 3.5V-5.5V, meanwhile, the filter capacitor of the booster circuit cannot be too large, the battery voltage can be pulled very low when the capacitor is too large and the boost is started, and the system cannot normally work.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a boost circuit job stabilization, efficient electronic shelf label three-colour LED power supply circuit.

The utility model discloses an electronic shelf label three-colour LED power supply circuit, including switch circuit unit, boost circuit unit and three-colour LED lamp drive circuit unit, switch circuit unit connects boost circuit unit, boost circuit unit is connected with three-colour LED lamp drive circuit unit.

Further, the switching circuit unit includes: triode Q8, triode Q4, resistance R9 and resistance R27, triode Q8 'S G utmost point connecting resistance R9 one end, resistance R9 other end ground connection, triode Q8' S the S utmost point ground connection, triode Q8 'S the D utmost point is connected with triode Q4' S the G utmost point, resistance R27 is connected with triode Q4 'S the G utmost point and the S utmost point respectively, triode Q4' S the S utmost point is connected battery voltage positive pole.

Further, the boost circuit unit includes: the LED driving circuit comprises a chip U1, a diode U10, a resistor R1, a resistor R7, a resistor R12, a capacitor C2, a capacitor C11 and an inductor L1, wherein a pin 4 of the chip U1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the output end of the boosting circuit unit, a pin 5 of a chip U1 is connected with the output end of the boosting circuit unit, a pin 3 of the U1 is connected with the common end of the resistor R1, the common end of the resistor R12 and the common end of the capacitor C11, the other end of the resistor R1 is grounded, the other ends of the resistor R12 and the capacitor C11 are connected and connected with the cathode of the diode U10 and the common end of the capacitor C2, the other end of the capacitor C2 is grounded, the anode of the diode U10 is connected with a chip pin 1, the two ends of the inductor.

Further, the chip U1 model is LM27313 XMF.

Further, a capacitor C5 is arranged between the switch circuit unit and the boost circuit unit, and the capacitor C5 is a filter capacitor.

Further, the three-color LED lamp driving circuit unit includes: triode Q5, resistance R52, electric capacity C9 and three-colour LED lamp K28, triode Q5 'S the S utmost point is connected boost circuit unit output, and 3V voltage end is connected to its G utmost point, three-colour LED lamp K28 foot 3 and resistance R52 common port are connected to triode Q5' S the D utmost point, and three-colour LED lamp K28 foot 4 and electric capacity C9 common port are connected to the resistance R52 other end boost circuit unit output, three-colour LED lamp K28 foot 1 connecting terminal seat, three-colour LED lamp K28 foot 2 ground connection.

The electronic shelf label three-color LED power supply circuit has the following technical effects:

implement the utility model discloses an electronic shelf label three-colour LED power supply circuit rises 3V DC voltage to direct current 4.15V and supplies power for three-colour LED and active buzzer, and work efficiency is high, and does not influence the normal work of other circuit system of electronic shelf label.

Drawings

For the purpose of clearly illustrating the embodiments or technical solutions of the present invention, the drawings are used for brief description. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a functional block diagram of an electronic shelf label three-color LED power supply circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a switch circuit unit and a booster circuit unit in an electronic shelf label three-color LED power supply circuit according to an embodiment of the present invention;

fig. 3 is an embodiment of the utility model discloses a three-colour LED lamp drive circuit unit structure sketch map among electronic shelf label three-colour LED power supply circuit.

Detailed Description

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

Referring to fig. 1, an embodiment of the present invention provides an electronic shelf label three-color LED power supply circuit, including a switch circuit unit 10, a boost circuit unit 20 and a three-color LED lamp driving circuit unit 30, wherein the switch circuit unit 10 is connected to the boost circuit unit 20, and the boost circuit unit 20 is connected to the three-color LED lamp driving circuit unit 30.

Referring to fig. 2, the switching circuit unit 10 includes: triode Q8, triode Q4, resistance R9 and resistance R27, triode Q8 'S G utmost point connecting resistance R9 one end, resistance R9 other end ground connection, triode Q8' S the S utmost point ground connection, triode Q8 'S the D utmost point is connected with triode Q4' S the G utmost point, resistance R27 is connected with triode Q4 'S the G utmost point and the S utmost point respectively, triode Q4' S the S utmost point is connected battery voltage positive pole.

Referring to fig. 2, the boost circuit unit 20 includes: the LED three-color lamp driving circuit comprises a chip U1, a diode U10, a resistor R1, a resistor R7, a resistor R12, a capacitor C2, a capacitor C11 and an inductor L1, wherein a pin 4 of the chip U1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the output end of the boosting circuit unit, a pin 5 of the chip U1 is connected with the output end of the boosting circuit unit, a pin 3 of the U1 is connected with the common end of the resistor R1, the common end of the resistor R12 and the common end of the capacitor C11, the other end of the resistor R1 is grounded, the other ends of the resistor R12 and the capacitor C11 are connected and connected with the cathode of the diode U11 and the common end of the capacitor C11, the other end of the capacitor C11 is grounded, the anode of the diode U11 is connected with a chip pin 1, the two ends of the inductor L11 are respectively connected with the pin 5.

Referring to fig. 2, a capacitor C5 is disposed between the switch circuit unit 10 and the boost circuit unit 20, and the capacitor C5 is a filter capacitor.

Referring to fig. 3, the three-color LED lamp driving circuit unit 30 includes: triode Q5, resistance R52, electric capacity C9 and three-colour LED lamp K28, triode Q5 'S the S utmost point is connected boost circuit unit output, and 3V voltage end is connected to its G utmost point, three-colour LED lamp K28 foot 3 and resistance R52 common port are connected to triode Q5' S the D utmost point, and three-colour LED lamp K28 foot 4 and electric capacity C9 common port are connected to the resistance R52 other end boost circuit unit output, three-colour LED lamp K28 foot 1 connecting terminal seat, three-colour LED lamp K28 foot 2 ground connection.

The following is further described:

the technical scheme of the utility model is that: the power supply of electron goods shelves label is No. 5 batteries 3V of two sections series connection, battery 3V directly supplies power for MCU and other peripheral circuits, battery 3V also steps up 4.15V through boost circuit and supplies power for tristimulus LED lamp and active buzzer simultaneously, tristimulus LED lamp and active buzzer during operation current can be very big, load can be very big to No. 5 batteries of two sections power supply, so boost circuit's efficiency will be high, and boost circuit is closed at the time of for the power saving, so the system during operation, it can be opened to step up, can charge for electric capacity in the twinkling of an eye to step up and open, the battery can shake and can be pulled to the minimum operating voltage of MCU once even, thereby lead to the unable normal work of system, so some electric capacity parameters of the boost circuit of electron goods shelves and the position of placing all need to adjust, thereby guarantee normal work and communication of electron goods shelves label.

As shown in fig. 2, the transistors Q8, Q4 and the resistors R9, R27 form a switch circuit unit, the switch circuit unit is for saving power and can turn on or off the voltage boost circuit, the capacitor C5 is a front filter capacitor of the voltage boost circuit, the chip U1 is a voltage boost chip, its pin 5 is input voltage, pin 1 is output voltage, pin 4 is an enable pin, a resistor R7 is connected in the middle of the switch circuit unit, the voltage boost circuit unit can be turned on or off, pin 2 is a ground pin, pin 3 is a boost feedback pin, the resistors R1, R12, and C11 form a feedback circuit diagram, L1 is a boost inductor, U10 is an incoming diode to prevent the voltage from reversing, and C2 is a boost filter capacitor.

As shown in fig. 3, the three-color LED lamp driving circuit unit, the triode Q5 and the resistor R52 constitute a level conversion circuit, because the single chip microcomputer is 3V, the three-color lamp is 4.15V, K28 is an RGB three-color LED lamp, 4 pins thereof are power pins, C9 is a filter capacitor, 3 pins are data input pins, 1 pin is a data output pin, 2 pins are ground pins, and the J terminal base can be connected with a string of RGB three-color lamp beads the same as K28.

The switching circuit unit is added in front of the booster circuit unit for power saving, and the filter capacitor C5 is placed in front of the booster circuit unit, namely on the BAT _3V network, for ensuring the stability of the battery voltage. The capacitor C5 is not added to the pin 5 of the boost chip U1, so as to ensure that the boost circuit unit prevents the capacitor from being charged by the battery at the moment of starting, the battery voltage can shake and even can be pulled below the lowest working voltage of the MCU, and the whole power supply system cannot work normally and communication fails. Meanwhile, the capacitor C2 is the same, and at the moment that the booster circuit unit is turned on, the battery charges the capacitor C2, and the charging time is longer as the capacitance value of the capacitor is larger, so that the capacitance value of the capacitor C2 cannot be too large.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements and the like, which are made within the spirit and principles of the present invention.

Claims

1. The utility model provides an electronic shelf label three-colour LED power supply circuit, its characterized in that, includes switch circuit unit, boost circuit unit and three-colour LED lamp drive circuit unit, switch circuit unit connection boost circuit unit, the boost circuit unit is connected with three-colour LED lamp drive circuit unit, the boost circuit unit includes: the LED driving circuit comprises a chip U1, a diode U10, a resistor R1, a resistor R7, a resistor R12, a capacitor C2, a capacitor C11 and an inductor L1, wherein a pin 4 of the chip U1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the output end of the boosting circuit unit, a pin 5 of a chip U1 is connected with the output end of the boosting circuit unit, a pin 3 of the U1 is connected with the common end of the resistor R1, the common end of the resistor R12 and the common end of the capacitor C11, the other end of the resistor R1 is grounded, the other ends of the resistor R12 and the capacitor C11 are connected and connected with the cathode of the diode U10 and the common end of the capacitor C2, the other end of the capacitor C2 is grounded, the anode of the diode U10 is connected with a chip pin 1, the two ends of the inductor.

2. The electronic shelf label three-color LED power supply circuit according to claim 1, wherein the switching circuit unit includes: triode Q8, triode Q4, resistance R9 and resistance R27, triode Q8 'S G utmost point connecting resistance R9 one end, resistance R9 other end ground connection, triode Q8' S the S utmost point ground connection, triode Q8 'S the D utmost point is connected with triode Q4' S the G utmost point, resistance R27 is connected with triode Q4 'S the G utmost point and the S utmost point respectively, triode Q4' S the S utmost point is connected battery voltage positive pole.

3. The electronic shelf label three-color LED power supply circuit of claim 1, wherein the chip U1 model is LM27313 XMF.

4. The electronic shelf label three-color LED power supply circuit as claimed in claim 1, wherein a capacitor C5 is arranged between the switch circuit unit and the voltage boost circuit unit, and the capacitor C5 is a filter capacitor.

5. The electronic shelf label three-color LED power supply circuit according to claim 1, wherein the three-color LED lamp driving circuit unit includes: triode Q5, resistance R52, electric capacity C9 and three-colour LED lamp K28, triode Q5 'S the S utmost point is connected boost circuit unit output, and 3V voltage end is connected to its G utmost point, three-colour LED lamp K28 foot 3 and resistance R52 common port are connected to triode Q5' S the D utmost point, and three-colour LED lamp K28 foot 4 and electric capacity C9 common port are connected to the resistance R52 other end boost circuit unit output, three-colour LED lamp K28 foot 1 connecting terminal seat, three-colour LED lamp K28 foot 2 ground connection.