CN107509271A - A switch switching circuit and LED lamp - Google Patents

Abstract

The invention discloses a switch switching circuit and an LED lamp, wherein the LED lamp comprises two LED light sources and the switch switching circuit, wherein one LED light source is connected to two ends of an ACN1 output port and an L1 output port, and the other LED light source is connected to two ends of an ACN1 output port and an L2 output port. The invention adopts a way of writing programs written by the MCU to control the output way: if the MCU detects that the I/O port is powered down once (the switch is switched once), the output I/O port switches the output to a high level and a low level, and the switching sequence can be selected according to requirements. The invention can realize the switching of single-path or double-path output, and the circuit can be flexibly applied to various circuits, such as two paths of lamps with different powers, and the single-path or double-path lamps can be switched on by a switch to achieve different environmental requirements and power saving modes.

Description

A switch switching circuit and LED lamp

technical field

The invention relates to the technical field of lighting lamps, in particular to a switch switching circuit and an LED lamp.

Background technique

At present, LED is widely used in the field of mobile lighting. It has the advantages of high energy efficiency, long life and environmental protection, and has won the popularity of users. It is regarded as the most potential next-generation lighting source. developed rapidly. Large shopping malls, large supermarkets, large hotels, and office buildings are full of LED lighting, and users have put forward many new requirements.

For example, when users use LEDs, they need to be able to switch between single-channel or dual-channel outputs at will because different environments require different lighting intensity or in order to save power.

Contents of the invention

In view of this, in order to solve the above-mentioned problems in the prior art, the present invention proposes a switch switching circuit and an LED lamp.

The present invention solves the above problems by the following technical means:

A switch switching circuit, including an ACN input port and an ACL input port, one end of the ACN input port is connected to the N end of the mains, the other end of the ACN input port is connected to the -AC end of the rectifier bridge BD1, and one end of the ACL input port is connected to the L end of the mains , the other end of the ACL input port is connected to one end of the first resistor R1 through the fuse F1, the other end of the first resistor R1 is connected to the +AC end of the rectifier bridge BD1, and the other end of the ACN input port is respectively connected to the first resistor R1 through the varistor RV1 One end, one end of the second capacitor C2, the other end of the second capacitor C2 is connected to the +AC end of the rectifier bridge BD1, the +V end of the rectifier bridge BD1 is connected to the positive pole of the first capacitor C1, and the negative pole of the first capacitor C1 is connected to the rectifier bridge BD1 The -V terminal of the rectifier bridge BD1 is connected to the -V terminal of the rectifier bridge BD1 through the third resistor R3, the anode of the first capacitor C1 is connected to the negative pole of the Zener diode DZ1 through the fourth resistor R4, and the The positive pole is connected to the negative pole of the first capacitor C1, the negative pole of the first capacitor C1 is connected to the negative pole of the fifth capacitor C5, the positive pole of the fifth capacitor C5 is connected to the negative pole of the sixth diode D6, and the positive pole of the sixth diode D6 is connected to the ACN input port, the positive pole of the fifth capacitor C5 is connected to one end of the thirteenth resistor R13 through the twelfth resistor R12, and the other end of the thirteenth resistor R13 is connected to one end of the fifteenth resistor R15 through the fourteenth resistor R14, and the fifteenth resistor The other end of R15 is connected to the negative pole of the fifth capacitor C5, the other end of the fifteenth resistor R15 is grounded, the negative pole of the fifth capacitor C5 is connected to the negative pole of the third capacitor C3, and the positive pole of the third capacitor C3 is connected to the first VCC terminal of the chip U1 , the first VCC end of the chip U1 is connected to one end of the resistor R7B, the other end of the resistor R7B is connected to the positive pole of the first capacitor C1 through the resistor R7A, the negative pole of the fifth capacitor C5 is connected to one end of the resistor R7B through the resistor R7C, and the first end of the chip U1 The VCC terminal is connected to the second VCC terminal, the first GND terminal of the chip U1 is connected to the negative pole of the fourth capacitor C4, the positive pole of the fourth capacitor C4 is connected to the AC terminal of the chip U1, and the first GND terminal of the chip U1 is connected to the second GND terminal. The AC end of the chip U1 is connected to one end of the fifteenth resistor R15, the P1 end of the chip U1 is connected to the base of the first triode Q1 through the tenth resistor R10, the emitter of the first triode Q1 is grounded, and the first triode The collector of the tube Q1 is respectively connected to the positive pole of the fifth diode D5 and one end of the coil of the first relay JDZ1, the negative pole of the fifth diode D5 and the other end of the coil of the first relay JDZ1 are connected to one end of the eighth resistor R8, and the second The other end of the eighth resistor R8 is connected to the P1 end of the chip U1 through the tenth resistor R10, and the P2 end of the chip U1 is connected to the base of the second transistor Q2 through the eleventh resistor R11, and the emitter of the second transistor Q2 is grounded , the collector of the second triode Q2 is respectively connected to the anode of the seventh diode D7, one end of the coil of the second relay JDZ2, the cathode of the seventh diode D7, and the other end of the coil of the second relay JDZ2 are connected to the ninth resistor One end of R9 , the other end of the ninth resistor R9 is connected to the P2 end of the chip U1 through the eleventh resistor R11, the cathode of the fifth diode D5 is connected to the cathode of the seventh diode D7, the ACN input port is connected to the ACN1 output port, and the first resistor One end of R1 is respectively connected to one end of the normally open contact of the first relay JDZ1, one end of the normally open contact of the second relay JDZ2, the other end of the normally open contact of the first relay JDZ1 is connected to the L1 output port, and the second relay JDZ2 The other end of the normally open contact is connected to the L2 output port.

Further, the chip U1 is XD6062.

An LED lamp, including two LED light sources, and also includes the switch switching circuit, wherein one LED light source is connected to the two ends of the ACN1 output port and the L1 output port, and the other LED light source is connected to the ACN1 output port and the two ends of the L2 output port .

Compared with the prior art, the beneficial effects of the present invention are as follows:

The present invention can realize switching of single or double output, and the circuit can be flexibly applied to various circuits, such as connecting two lights with different sizes and powers, realizing single or double lights through switch switching to achieve different environments requirements and power saving mode.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a switching circuit of the present invention.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention.

Example 1

As shown in Figure 1, the present invention provides a switch switching circuit, including an ACN input port and an ACL input port. One end of the input port is connected to the L terminal of the mains, the other end of the ACL input port is connected to one end of the first resistor R1 through the fuse F1, the other end of the first resistor R1 is connected to the +AC end of the rectifier bridge BD1, and the other end of the ACN input port is connected to the voltage sensitive The resistor RV1 is respectively connected to one end of the first resistor R1 and one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the +AC terminal of the rectifier bridge BD1, and the +V terminal of the rectifier bridge BD1 is connected to the positive pole of the first capacitor C1, and the second capacitor C2 is connected to the positive pole of the first capacitor C1. The negative pole of a capacitor C1 is connected to the -V terminal of the rectifier bridge BD1, the +V terminal of the rectifier bridge BD1 is connected to the -V terminal of the rectifier bridge BD1 through the third resistor R3, and the positive pole of the first capacitor C1 is connected to the Zener diode through the fourth resistor R4 The negative pole of DZ1, the positive pole of the Zener diode DZ1 is connected to the negative pole of the first capacitor C1, the negative pole of the first capacitor C1 is connected to the negative pole of the fifth capacitor C5, the positive pole of the fifth capacitor C5 is connected to the negative pole of the sixth diode D6, and the sixth The anode of the diode D6 is connected to the ACN input port, the anode of the fifth capacitor C5 is connected to one end of the thirteenth resistor R13 through the twelfth resistor R12, and the other end of the thirteenth resistor R13 is connected to the fifteenth resistor through the fourteenth resistor R14. One end of the resistor R15, the other end of the fifteenth resistor R15 is connected to the negative pole of the fifth capacitor C5, the other end of the fifteenth resistor R15 is grounded, the negative pole of the fifth capacitor C5 is connected to the negative pole of the third capacitor C3, and the negative pole of the third capacitor C3 The positive pole is connected to the first VCC terminal of the chip U1, the first VCC terminal of the chip U1 is connected to one end of the resistor R7B, the other end of the resistor R7B is connected to the positive pole of the first capacitor C1 through the resistor R7A, and the negative pole of the fifth capacitor C5 is connected to the resistor through the resistor R7C One end of R7B, the first VCC end of the chip U1 is connected to the second VCC end, the first GND end of the chip U1 is connected to the negative pole of the fourth capacitor C4, the positive pole of the fourth capacitor C4 is connected to the AC end of the chip U1, and the first GND end of the chip U1 is connected to the AC end of the chip U1. One GND end is connected to the second GND end, the AC end of the chip U1 is connected to one end of the fifteenth resistor R15, the P1 end of the chip U1 is connected to the base of the first transistor Q1 through the tenth resistor R10, and the first transistor Q1 The emitter of the first triode Q1 is connected to the positive pole of the fifth diode D5, one end of the coil of the first relay JDZ1, the negative pole of the fifth diode D5, and the other end of the coil of the first relay JDZ1 respectively. One end of the eighth resistor R8 is connected, the other end of the eighth resistor R8 is connected to the P1 end of the chip U1 through the tenth resistor R10, and the P2 end of the chip U1 is connected to the base of the second triode Q2 through the eleventh resistor R11. The emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is respectively connected to the anode of the seventh diode D7, one end of the coil of the second relay JDZ2, the negative pole of the seventh diode D7, the second relay The other end of the JDZ2 coil Connect one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to the P2 end of the chip U1 through the eleventh resistor R11, the cathode of the fifth diode D5 is connected to the cathode of the seventh diode D7, and the ACN input port is connected to ACN1 output port, one end of the first resistor R1 is respectively connected to one end of the normally open contact of the first relay JDZ1, one end of the normally open contact of the second relay JDZ2, and the other end of the normally open contact of the first relay JDZ1 is connected to L1 output port, the other end of the normally open contact of the second relay JDZ2 is connected to the L2 output port.

In this embodiment, the chip U1 is XD6062.

The present invention adopts the mode that MCU writing program is written in to control the output mode:

If the MCU detects that the I/O port detects a power failure (one switch), the output I/O port will take turns to switch the output high level and low level. The conversion sequence can be selected according to the demand. The current sequence is: H->L ->H->L.

It is necessary to add a power supply circuit to the power supply to provide a stable 3.3V power supply to the MCU.

Connect the MCU output I/O port to the output control terminal on the power supply to control the transistor to turn on and off.

After rectification, the output terminal provides a stable 3.3V power supply for the MCU. At the same time, two resistors are connected from the bus to divide the voltage to the MCU for power-off detection. The MCU PWM output pin is connected to the B pole pin of the triode. The working principle is: when The input CAN and ACL are connected to the 220V mains, ACN1 and ACN are directly connected, the first L1 passes through the insurance F1, and then directly outputs through JDZ1 (jumper), the second L2 reaches the front of the JDZ2 relay after passing through the insurance F1, and U1 passes through R1 , C2, BD1, C1, R3, R4, DZ1, C5, R7A, R7B are step-down and rectified to supply power, and the I/O port P2 is connected to the written program to output a low-level signal to the B extreme of Q2 so that Q2 cannot lead The JDZ2 relay is disconnected, so L2 has no output. At this time, only L1 outputs 220V AC power all the way; and when the power is turned off once by switching the input switch, the power-down detection circuit D6, C5, R12, R13, R14, R15, and C4 give The AC level signal to the MCU will drop once with the voltage. At this time, the AC port of the MCU detects a power failure, and the program written in the P2I/O of the MCU will output a high level according to the conditions, and control Q2 to turn on the output. The JDZ2 relay will be connected, and L2 can output 220V AC through JDZ2. At this time, L1 and L2 can output 220V AC at the same time. This software can realize the switching of single-channel or dual-channel output. The circuit can be flexibly adapted to In various circuits, such as connecting two lights with different sizes and powers, the lights of different powers can be turned on by switching to achieve different environmental requirements and power-saving modes.

Example 2

The present invention also provides an LED lamp, which includes two LED light sources and the switch switching circuit, wherein one LED light source is connected to both ends of the ACN1 output port and the L1 output port, and the other LED light source is connected to the ACN1 output port and the L2 output port. both ends of the output port.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (3)

1. A switching circuit, characterized in that it comprises an ACN input port and an ACL input port, one end of the ACN input port is connected to the N terminal of the mains, the other end of the ACN input port is connected to the -AC end of the rectifier bridge BD1, and one end of the ACL input port Connect the L terminal of the mains, the other end of the ACL input port is connected to one end of the first resistor R1 through the fuse F1, the other end of the first resistor R1 is connected to the +AC end of the rectifier bridge BD1, and the other end of the ACN input port is connected to the varistor RV1 respectively. Connect one end of the first resistor R1 and one end of the second capacitor C2, the other end of the second capacitor C2 is connected to the +AC end of the rectifier bridge BD1, the +V end of the rectifier bridge BD1 is connected to the positive pole of the first capacitor C1, and the first capacitor C1 The negative pole of the rectifier bridge BD1 is connected to the -V terminal of the rectifier bridge BD1, the +V terminal of the rectifier bridge BD1 is connected to the -V terminal of the rectifier bridge BD1 through the third resistor R3, and the positive pole of the first capacitor C1 is connected to the negative pole of the Zener diode DZ1 through the fourth resistor R4 , the anode of the Zener diode DZ1 is connected to the cathode of the first capacitor C1, the cathode of the first capacitor C1 is connected to the cathode of the fifth capacitor C5, the anode of the fifth capacitor C5 is connected to the cathode of the sixth diode D6, and the sixth diode The positive pole of D6 is connected to the ACN input port, the positive pole of the fifth capacitor C5 is connected to one end of the thirteenth resistor R13 through the twelfth resistor R12, and the other end of the thirteenth resistor R13 is connected to the fifteenth resistor R15 through the fourteenth resistor R14 One end, the other end of the fifteenth resistor R15 is connected to the negative pole of the fifth capacitor C5, the other end of the fifteenth resistor R15 is grounded, the negative pole of the fifth capacitor C5 is connected to the negative pole of the third capacitor C3, and the positive pole of the third capacitor C3 is connected to the chip The first VCC end of U1, the first VCC end of the chip U1 is connected to one end of the resistor R7B, the other end of the resistor R7B is connected to the positive pole of the first capacitor C1 through the resistor R7A, and the negative pole of the fifth capacitor C5 is connected to one end of the resistor R7B through the resistor R7C , the first VCC terminal of the chip U1 is connected to the second VCC terminal, the first GND terminal of the chip U1 is connected to the negative pole of the fourth capacitor C4, the positive pole of the fourth capacitor C4 is connected to the AC terminal of the chip U1, and the first GND terminal of the chip U1 Connect the second GND end, the AC end of the chip U1 is connected to one end of the fifteenth resistor R15, the P1 end of the chip U1 is connected to the base of the first transistor Q1 through the tenth resistor R10, and the emitter of the first transistor Q1 Grounded, the collector of the first triode Q1 is respectively connected to the anode of the fifth diode D5, one end of the coil of the first relay JDZ1, the cathode of the fifth diode D5, and the other end of the coil of the first relay JDZ1 are connected to the eighth One end of the resistor R8, the other end of the eighth resistor R8 is connected to the P1 end of the chip U1 through the tenth resistor R10, and the P2 end of the chip U1 is connected to the base of the second triode Q2 through the eleventh resistor R11, and the second triode The emitter of the tube Q2 is grounded, and the collector of the second triode Q2 is respectively connected to the anode of the seventh diode D7, one end of the coil of the second relay JDZ2, the negative pole of the seventh diode D7, and the coil of the second relay JDZ2. The other end is connected to the One end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to the P2 end of the chip U1 through the eleventh resistor R11, the cathode of the fifth diode D5 is connected to the cathode of the seventh diode D7, and the ACN input port is connected to the ACN1 output One end of the first resistor R1 is respectively connected to one end of the normally open contact of the first relay JDZ1, one end of the normally open contact of the second relay JDZ2, and the other end of the normally open contact of the first relay JDZ1 is connected to the L1 output port , the other end of the normally open contact of the second relay JDZ2 is connected to the L2 output port. 2. The switch switching circuit according to claim 1, wherein the chip U1 is an XD6062. 3. An LED lamp, comprising two LED light sources, characterized in that it also comprises the switch switching circuit described in any one of claims 1-2, wherein one LED light source is connected to both ends of the ACN1 output port and the L1 output port, and the other An LED light source is connected to both ends of the ACN1 output port and the L2 output port.