CN204465987U - A kind of AC and DC dual-purpose LED lamp control circuit - Google Patents

Abstract

The utility model discloses a kind of AC/DC LED control circuit, comprise rectifier transformer module, relay J, chip IC 1 and triode V1, the input of described rectifier transformer module connects 220V alternating current, the contact J-1 of the output 1 contact resistance R1 of rectifier transformer module, resistance R2, lamp group L1, lamp group L2 and relay J.The utility model control circuit adopts LM321 chip composition constant current source power supply circuit and under-voltage indicating circuit, lighting voltage is not only made to stablize, and the situation of brownout is indicated, be convenient for people to take counter-measure early, be provided with alternating current-direct current handoff functionality in circuit simultaneously, can emergency service when running into power-off, this circuit has the advantage of easy to use, energy-conserving and environment-protective, emergency service and working stability.

Description

A kind of AC and DC dual-purpose LED lamp control circuit

technical field

The utility model relates to a lighting circuit, in particular to an AC and DC dual-purpose LED lamp control circuit.

Background technique

Due to the advantages of low cost, long life, small size and high brightness, white LEDs are rapidly applied to the field of lighting, especially in outdoor lighting, especially the voice-activated lights that have been promoted in recent years, which are easy to use and save power. At present, most of the control circuits of LED lamps on the market still adopt the old structure, and the function is single, and the power condition of the circuit undervoltage will seriously affect the lighting quality, and often encounter power outages in rural areas and remote areas in the west. production and life has brought inconvenience.

Utility model content

The purpose of this utility model is to provide an AC/DC dual-purpose LED lamp control circuit with multiple functions and stable output, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An AC and DC dual-purpose LED lamp control circuit, including a rectifier transformer module, a relay J, a chip IC1 and a triode V1, the input end of the rectification and transformation module is connected to 220V alternating current, and the output end 1 of the rectification and transformation module is connected to a resistor R1, Resistor R2, lamp group L1, lamp group L2 and contact J-1 of relay J, the other end of resistor R1 is connected to the cathode of diode D1 and relay J, and the other end of relay J is connected to the anode of diode D1 and the rectifier and transformer module The output terminal 2 is grounded, the other end of the lamp group L1 is connected to the collector of the triode V1, the base of the triode V1 is connected to the pin 4 of the chip IC3, the emitter of the triode V1 is connected to the resistor R6 and the pin 3 of the chip IC3, and the resistor R6 The other end of the resistor R2 is connected to the anode of the three-terminal adjustable reference source Q1, the control electrode of the three-terminal adjustable reference source Q1 and pin 1 of the chip IC1, and the pin 3 of the chip IC1 is connected to the capacitor C1, the resistor R3 and resistor R4, the other end of capacitor C1 is connected to resistor R5 and grounded, pin 1 of chip IC3 is connected to the other end of resistor R4, the other end of resistor R5 and pin 1 of chip IC4, and the three-terminal adjustable reference source Q1 The cathode is grounded, the other end of resistor R3 is connected to resistor R9 and pin 1 of chip IC2, the other end of resistor R9 is connected to the anode of diode D2 and pin 4 of chip IC2, the anode of diode D2 is connected to resistor R19, and the other end of resistor R10 Ground, pin 3 of chip IC2 is connected to resistor R7, the other end of resistor R7 is connected to the sliding end of potentiometer RP1, pin 3 of chip IC4 is connected to the base of triode V2, pin 3 of chip IC4 is connected to the emitter of triode V2 and resistor R11, the other end of resistor R11 is grounded, the other end of J-1 of relay J is connected to capacitor C2, resistor R12, the anode of diode D3 and switch S1, the cathode of diode D3 is connected to resistor R8, and the other end of resistor R8 One end is connected to the other end of the capacitor C2 and grounded, the other end of the resistor R12 is connected to the fixed end of the potentiometer RP1, the other fixed end of the potentiometer RP1 is connected to the negative pole of the battery E and grounded, and the positive pole of the battery E is connected to the other end of the switch S1; The models of the chip IC1, the chip IC2, the chip IC3 and the chip IC4 are all LM321.

As a further solution of the present invention: both the lamp group L1 and the lamp group L2 are composed of six 1W light-emitting diodes.

As a further solution of the utility model: the rated voltage of the storage battery E is 24V.

As a further solution of the present invention: the diode D2 is a green light emitting diode, and the diode D3 is a red light emitting diode.

Compared with the prior art, the beneficial effect of the utility model is: the control circuit of the utility model adopts the LM321 chip to form a constant current source power supply circuit and an undervoltage indicating circuit, which not only makes the lighting voltage stable, but also indicates the condition of the voltage being too low , It is convenient for people to take countermeasures as soon as possible. At the same time, the AC and DC switching function is set in the circuit, which can provide emergency power supply in case of power failure. This circuit has the advantages of convenient use, energy saving and environmental protection, emergency power supply and stable work.

Description of drawings

Figure 1 is a circuit diagram of a control circuit for an AC and DC dual-purpose LED lamp.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, in the embodiment of the utility model, an AC and DC dual-purpose LED lamp control circuit includes a rectifier transformer module, a relay J, a chip IC1 and a triode V1, and the input end of the rectification and transformation module is connected to 220V AC, The output terminal 1 of the rectifier and transformer module is connected to the resistor R1, the resistor R2, the lamp group L1, the lamp group L2 and the contact J-1 of the relay J, the other end of the resistor R1 is connected to the cathode of the diode D1 and the relay J, and the other end of the relay J One end is connected to the anode of the diode D1 and the output terminal 2 of the rectification and transformation module and grounded, the other end of the lamp group L1 is connected to the collector of the triode V1, the base of the triode V1 is connected to pin 4 of the chip IC3, and the emitter of the triode V1 is connected to Resistor R6 and pin 3 of chip IC3, the other end of resistor R6 is grounded, the other end of resistor R2 is connected to the anode of three-terminal adjustable reference source Q1, the control pole of three-terminal adjustable reference source Q1 and pin 1 of chip IC1 , pin 3 of chip IC1 is connected to capacitor C1, resistor R3 and resistor R4, the other end of capacitor C1 is connected to resistor R5 and grounded, pin 1 of chip IC3 is connected to the other end of resistor R4, the other end of resistor R5 and chip IC4 Pin 1, the cathode of the three-terminal adjustable reference source Q1 is grounded, the other end of the resistor R3 is connected to the resistor R9 and pin 1 of the chip IC2, the other end of the resistor R9 is connected to the anode of the diode D2 and the pin 4 of the chip IC2, the diode The anode of D2 is connected to resistor R19, the other end of resistor R10 is grounded, pin 3 of chip IC2 is connected to resistor R7, the other end of resistor R7 is connected to the sliding end of potentiometer RP1, pin 3 of chip IC4 is connected to the base of transistor V2, The pin 3 of the chip IC4 is connected to the emitter of the triode V2 and the resistor R11, the other end of the resistor R11 is grounded, and the other end of the outlet J-1 of the relay J is connected to the capacitor C2, the resistor R12, the anode of the diode D3 and the switch S1, The cathode of diode D3 is connected to resistor R8, the other end of resistor R8 is connected to the other end of capacitor C2 and grounded, the other end of resistor R12 is connected to the fixed end of potentiometer RP1, and the other fixed end of potentiometer RP1 is connected to the negative pole of battery E and grounded , the positive pole of the battery E is connected to the other end of the switch S1; the models of the chips IC1, IC2, IC3 and IC4 are all LM321.

Both the lamp group L1 and the lamp group L2 are composed of six 1W light emitting diodes.

The rated voltage of battery E is 24V.

The diode D2 is a green light emitting diode, and the diode D3 is a red light emitting diode.

The working principle of the utility model is: the circuit is connected to the mains voltage, and the 220V mains voltage becomes 24V DC voltage for the working voltages of all levels after passing through the rectification and transformation module. First, the 2.5V reference voltage generated by the three-terminal regulated reference source Q1 is sent to the pin 1 of the chip IC1, and the output of the pin 4 is also 2.5V, filtered by the capacitor Cl and divided by the resistors R4 and R5 to provide 1.25V The stable voltage is the reference voltage of the constant current source, which is respectively sent to the first pin of the chip IC3 and the first pin of the chip IC4, and its output is amplified by the transistor V1 and the transistor V2 respectively. Resistors R6 and R11 are respectively connected to the 3rd pin of chip IC3 and the 3rd pin of chip IC4, and compare with the same phase "reference" through the inverting input to ensure that the two collectors output a constant current of about 340mA, and light up the two sets of lights respectively Diode L1 and L2 components. When encountering a mains power failure, the relay J is released, its contact J-1 is connected, the battery E is automatically switched, the two groups of lights are continuously lit, and everything works as usual to achieve the purpose of emergency lighting. Here, the first pin of the chip IC2 is connected to the reference 2.5V, and the third pin detects the battery E through the potentiometer RP1. Once it is lower than 20V, the chip IC2 turns over, and the fourth pin of the output terminal becomes high level, and the light-emitting diode D3 is lit. , to inform battery E that it needs to be charged.

Claims (4)

1. an AC/DC LED control circuit, comprise rectifier transformer module, relay J, chip IC 1 and triode V1, it is characterized in that, the input of described rectifier transformer module connects 220V alternating current, the output 1 contact resistance R1 of rectifier transformer module, resistance R2, lamp group L1, the contact J-1 of lamp group L2 and relay J, the other end of resistance R1 connects negative electrode and the relay J of diode D1, the other end of relay J connects the anode of diode D1 and the output 2 also ground connection of rectifier transformer module, the collector electrode of the other end connecting triode V1 of lamp group L1, the base stage of triode V1 connects the pin 4 of chip IC 3, the emitter contact resistance R6 of triode V1 and the pin 3 of chip IC 3, the other end ground connection of resistance R6, the other end of resistance R2 connects the anode of three end adjustable reference source Q1, the control pole of three end adjustable reference source Q1 and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects electric capacity C1, resistance R3 and resistance R4, the other end contact resistance R5 of electric capacity C1 ground connection, the other end of the pin 1 contact resistance R4 of chip IC 3, the other end of resistance R5 and the pin 1 of chip IC 4, the minus earth of three end adjustable reference source Q1, the other end contact resistance R9 of resistance R3 and the pin 1 of chip IC 2, the other end of resistance R9 connects the anode of diode D2 and the pin 4 of chip IC 2, the anode contact resistance R19 of diode D2, the other end ground connection of resistance R10, the pin 3 contact resistance R7 of chip IC 2, the other end of resistance R7 connects the sliding end of potentiometer RP1, the base stage of the pin 3 connecting triode V2 of chip IC 4, the emitter of the pin 3 connecting triode V2 of chip IC 4 and resistance R11, the other end ground connection of resistance R11, the other end of the J-1 that goes out to count out money of relay J connects electric capacity C2, resistance R12, the anode of diode D3 and switch S 1, the negative electrode contact resistance R8 of diode D3, the other end of resistance R8 connects the other end of electric capacity C2 and ground connection, the other end of resistance R12 connects the stiff end of potentiometer RP1, another stiff end of potentiometer RP1 connects the negative pole of storage battery E and ground connection, the other end of the positive pole connecting valve S1 of storage battery E, the model of described chip IC 1, chip IC 2, chip IC 3 and chip IC 4 is LM321.

2. a kind of AC/DC LED control circuit according to claim 1, is characterized in that, described lamp group L1 and lamp group L2 forms by the light-emitting diode of 6 1W.

3. a kind of AC/DC LED control circuit according to claim 1, is characterized in that, the rated voltage of described storage battery E is 24V.

4. a kind of AC/DC LED control circuit according to claim 1, it is characterized in that, described diode D2 is green light LED, and diode D3 is red light-emitting diode.