CN210016663U

CN210016663U - Slow-start stroboscopic-removing jitter control circuit and lamp

Info

Publication number: CN210016663U
Application number: CN201920521951.1U
Authority: CN
Inventors: 陈耀显; 陈实; 林杰忠
Original assignee: Huizhou Xiton Photoelectric Co Ltd
Current assignee: Huizhou Xiton Photoelectric Co Ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2020-02-04
Anticipated expiration: 2029-04-17

Abstract

The utility model relates to a circuit start control technical field especially relates to a slow start removes stroboscopic shake control circuit and lamps and lanterns. The soft start circuit comprises an input circuit, an output circuit and a soft start circuit, wherein the input end is connected with the output end of the input circuit; the input end of the stroboscopic removing circuit is connected with the output end of the slow starting circuit, and the output end of the stroboscopic removing circuit is connected with the input end of the output circuit; and the input end and the output end of the time delay turn-off circuit are respectively connected with the output end of the input circuit and the output end of the stroboscopic removing circuit and are used for staggering the starting time of the slow starting circuit and the stroboscopic removing circuit. The utility model discloses a shake switch over of two MOS pipes of time delay turn-off circuit, make slow starting circuit start working, make and remove stroboscopic circuit time delay segment time, avoid the start-up process time of slow start after, make again and remove stroboscopic circuit and begin working, realize that lamps and lanterns do not have stroboscopic effect circuit and delay when starting to avoid or reduce the high merit and slowly start the shake phenomenon that does not have stroboscopic circuit and appear when using.

Description

Slow-start stroboscopic-removing jitter control circuit and lamp

Technical Field

The utility model relates to a circuit start control technical field especially relates to a slow start removes stroboscopic shake control circuit and lamps and lanterns.

Background

With the advent of the age of LED lighting, LED light fixtures are being used more and more widely. At present, many LED lamps adopt a PFC (Power Factor Correction) high-Power slow-start non-strobe circuit as an LED start circuit.

However, the lamp which is matched with the high-power slow-start stroboflash-free circuit can shake strongly in the process of slowly starting and stroboflash removal, so that the visual blurring can occur when a client uses the lamp, the greatly-reduced slow-start stroboflash-free effect user experience is reduced, and the sale of the product is seriously influenced. Therefore, how to solve the problem of jitter occurring when the non-strobe circuit is used in high-power slow start becomes an important problem to be solved in the current field.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art at least one defect (not enough), provide one kind and slowly start and remove stroboscopic shake control circuit and lamps and lanterns.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a slow start stroboscopic-removing jitter control circuit comprises an input circuit, an output circuit and a slow start circuit, wherein the input end of the slow start stroboscopic-removing jitter control circuit is connected with the output end of the input circuit; the input end of the stroboscopic removing circuit is connected with the output end of the slow starting circuit, and the output end of the stroboscopic removing circuit is connected with the input end of the output circuit; and the delay turn-off circuit is connected between the output end of the stroboscopic removing circuit and the grounding end so as to delay and start the stroboscopic removing circuit.

Further, the delay turn-off circuit comprises a first MOS tube Q1, a second MOS tube Q2 and a delay module; the grid electrode of the second MOS tube Q2 is connected with the output end of the input circuit, and the input electrode and the output electrode of the second MOS tube Q2 are respectively connected with the output end of the stroboscopic removing circuit and the ground wire; the grid of the first MOS tube Q1 is connected with the output end of the input circuit through a delay module, and the input electrode and the output electrode of the first MOS tube Q1 are respectively connected with the node of the grid of the second MOS tube Q2 and the ground wire.

Further, the delay module comprises a first resistor R1, a first capacitor C1 and a zener diode ZD 1; the first resistor R1 and the first capacitor C1 are connected in series; the input end of the zener diode ZD1 is connected to a node between the first resistor R1 and the first capacitor C1, and the output end of the zener diode ZD1 is connected to the gate of the first MOS transistor Q1.

Further, the delay module further comprises a second resistor R2 and a diode D3; the second resistor R2 is connected in parallel to two ends of the series circuit of the first resistor R1 and the first capacitor C1; the input end and the output end of the diode D3 are respectively connected to a node between the first resistor R1 and the first capacitor C1 and a node between the first resistor R1 and the second resistor R2.

Further, a fifth resistor R5 is further disposed between the zener diode ZD1 and the first MOS transistor Q1, one end of the fifth resistor R5 is connected to a node between the zener diode ZD1 and the first MOS transistor Q1, and the other end of the fifth resistor R5 is connected to a ground line.

Further, a diode D2 is disposed at an input end of the time delay turn-off circuit.

Further, a voltage division module is further arranged between the grid of the second MOS transistor Q2 and the output end of the input circuit; the voltage division module comprises a second capacitor C2, a third resistor R3 and a fourth resistor R4; the third resistor R3 and the fourth resistor R4 are connected in series; the input end of a series circuit of the third resistor R3 and the fourth resistor R4 is connected with the output end of the input circuit, and the other end of the series circuit is connected with the ground wire; the second capacitor C2 is connected in parallel with the series circuit of the third resistor R3 and the fourth resistor R4; the gate of the second MOS transistor Q2 is connected to a node between the third resistor R3 and the fourth resistor R4.

Further, the slow starting circuit comprises an electrolytic capacitor C4, a sixth resistor R6 and a third capacitor C3, wherein the electrolytic capacitor C4, the inductor L and the third capacitor C3 are connected in parallel.

Further, the stroboscopic removal circuit comprises an integrated stroboscopic removal IC; the input end and the output end of the integrated stroboflash removing IC are respectively connected with the output end of the slow starting circuit and the input end of the output circuit, and the grounding end of the integrated stroboflash removing IC is connected with the negative electrode of the third capacitor.

The utility model also provides a lamp, lamp includes foretell slow-start and removes stroboscopic shake control circuit.

Compared with the prior art, the utility model discloses a shake switch over of two MOS pipes of time delay turn-off circuit, make slow starting circuit start working, will remove the stroboscopic circuit short circuit earlier, the stroboscopic circuit is removed in the disconnection, make and remove stroboscopic circuit delay a segment time and start, avoid the start-up process time back of slowly starting, make again and remove the stroboscopic circuit and begin working, it does not have the stroboscopic effect circuit of realization lamps and lanterns and delays when starting, thereby avoid or reduce the high merit and slowly start the shake phenomenon that does not have the stroboscopic circuit and appear when using, user experience can be greatly improved.

Drawings

Fig. 1 is a circuit structure diagram of the embodiment of the present invention for slowly starting the strobe-free jitter control circuit.

Fig. 2 is a circuit structure diagram of the delay shutdown circuit according to an embodiment of the present invention.

Wherein: the circuit comprises a 1 input circuit, a 2 output circuit, a 3 slow start circuit, a 4 stroboscopic removing circuit, a 5 delay turn-off circuit, a 51 delay module and a 52 voltage division module.

Detailed Description

In order to facilitate understanding of those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

Example one

Fig. 1 shows a circuit configuration diagram of a slow start strobe-free jitter control circuit provided in this embodiment, and fig. 2 shows a specific circuit configuration diagram of a delay off circuit in the slow start strobe-free jitter control circuit provided in this embodiment.

The utility model provides a slow start removes stroboscopic shake control circuit, includes input circuit 1, output circuit 2, slowly start circuit 3, removes stroboscopic circuit 4 and time delay shutoff circuit 5, in the circuit, input circuit 1's output is connected with the input that slowly starts circuit 3, removes stroboscopic circuit 4 and sets up slowly start circuit 3 between output circuit 2, wherein, removes stroboscopic circuit 4's input and output and is connected with the input that slowly starts circuit 3 output and output circuit 2 respectively. The input of time delay shutdown circuit 5 is connected on the node of 1 output of input circuit, time delay shutdown circuit 5, connect and remove 4 outputs of stroboscopic circuit and earthing terminal, time delay shutdown circuit 5 sets up between removing 4 outputs of stroboscopic circuit and ground wire promptly, thereby will remove 4 short circuits of stroboscopic circuit in the one end time that starts, control removes the start-up time of stroboscopic circuit 4, stagger the start-up time who slowly starts circuit 3 and removes stroboscopic circuit 4, thereby avoid or reduce and slowly start the condition emergence that the stroboscopic circuit 4 appears shaking of removing. Meanwhile, the input end of the delay cut-off circuit 5 is connected with the output end of the input circuit 1, and the input circuit 1 supplies power to the internal circuit of the delay cut-off circuit 5.

In some embodiments, the input of input circuit 1 is connected to an external power source and connected to the external power source to provide a power input to the soft start strobe dither control circuit. The input circuit 1 comprises a rectification module, a power supply IC, a third MOS tube and a transformer, wherein the rectification module is arranged at an input port of the input circuit 1 and is used for rectifying alternating current of an external power supply, two ends of a primary winding of the transformer are respectively connected with an output end of the rectification module and an input electrode of the MOS tube, and a secondary winding is used as an output end of the input circuit 1. The output pole of the MOS tube is connected with the ground wire, and the grid of the MOS tube is connected with the power supply IC control. When the transformer is used, after the power supply is electrified, the transformer primary stores energy, and the power supply IC controls the primary main switch to control the MOS tube to be switched on, so that the energy starts to be transferred from the primary winding to the secondary winding. The power supply IC controls the MOS tube to be switched on and off so as to complete the energy output and the switching off of the input circuit 1.

In addition, when in use, the output terminal of the output voltage is connected to an external device, and the voltage processed by the slow start strobe-free dither control circuit is output to the external device through the output circuit 2.

In some embodiments, the soft start circuit 3 includes an electrolytic capacitor C4, a sixth resistor R6, and a third capacitor C3, and the electrolytic capacitor C4, the sixth resistor R6, and the third capacitor C3 are connected in parallel. When the power supply IC is started, energy starts to be transferred from the primary winding to the secondary winding, so that the currents at the two ends of the electrolytic capacitor C4 and the third capacitor C3 in the slow start circuit 3 start to slowly rise, and the slow rise of the voltage at the output end of the slow start circuit 3 is realized by the slow rise of the current of the electrolytic capacitor C4, thereby realizing the slow start process of the slow start stroboscopic-removing jitter control circuit.

In some embodiments, the stroboscopic removing circuit 4 comprises an integrated stroboscopic removing IC, an input of which is connected to the output of the slow start circuit 3, and an output of which is connected to the output of the output circuit 2. In addition, the ground terminal of the integrated stroboscopic-removing IC is connected with the negative electrode of the third capacitor C3. During the during operation, input voltage goes to the integration from electrolytic capacitor C4 both ends output and removes stroboscopic IC, and the integration removes stroboscopic IC and handles input voltage, filters the electric current ripple that comes with electrolytic capacitor C4 both ends transmission to reach and remove stroboscopic effect.

In some embodiments, the delay-off circuit 5 includes a first MOS transistor Q1, a second MOS transistor Q2, a delay module 51, and a voltage-dividing module 52. The input pole of second MOS pipe Q2 is connected with the output that goes stroboscopic circuit 4, and second MOS pipe Q2 output ground connection, and simultaneously, the grid of second MOS pipe Q2 passes through voltage division module 52 and is connected with the input of time delay shutdown circuit 5, and voltage division module 52 divides the voltage of time delay shutdown circuit 5 input, makes the voltage reach the gate-on voltage of second MOS pipe Q2. The gate of the first MOS transistor Q1 is connected to the input terminal of the delay shutdown circuit 5 through the delay module 51, and the input terminal and the output terminal of the first MOS transistor Q1 are connected to the gate and the ground of the second MOS transistor Q2, respectively. The delay module 51 may delay the turn-on of the voltage to the gate of the first MOS transistor Q1 even if the gate voltage of the first MOS transistor Q1 reaches the gate-on voltage of the first MOS transistor Q1.

In some embodiments, the delay module 51 includes a first resistor R1, a first capacitor C1, a zener diode ZD1, a second resistor R2, and a diode D3. The first resistor R1 and the first capacitor C1 are connected in series, and the input end and the output end of a series circuit formed by the first resistor R1 and the first capacitor C1 are respectively connected with the input end and the ground wire of the time delay shutdown circuit 5. The first resistor R1 is used to slowly charge the first capacitor C1 with the input voltage of the time delay shutdown circuit 5 through the first resistor R1 when the power is turned on. The input end of the zener diode ZD1 is connected to the node between the first resistor R1 and the first capacitor C1, and the output end of the zener diode ZD1 is connected to the gate of the first MOS transistor Q1. Here, zener diode ZD1 plays a role in blocking voltage, when the driving power supply is connected, first capacitor C1 is charged, and when the voltage of first capacitor C1 reaches the value greater than or equal to the zener voltage of zener diode ZD1, a path may be formed through zener diode ZD1, thereby controlling first MOS transistor Q1 to be turned on.

In addition, a second resistor R2 is connected in parallel across the series circuit of the first resistor R1 and the first capacitor C1, and the input terminal and the output terminal of the diode D3 are connected to a node between the first resistor R1 and the first capacitor C1 and a node between the first resistor R1 and the second resistor R2, respectively.

In some embodiments, the voltage dividing module 52 includes a second capacitor C2, a third resistor R3, and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 being connected in series; the input end of the series circuit of the third resistor R3 and the fourth resistor R4 is connected with the output end of the input circuit 1, the other end of the series circuit is connected with the ground wire, and the grid of the second MOS tube Q2 is connected with the node between the third resistor R3 and the fourth resistor R4. The third resistor R3 and the fourth resistor R4 are used for adjusting and dividing voltage, so that the gate voltage of the second MOS transistor Q2 can reach the turn-on voltage of the second MOS transistor Q2, the second capacitor C2 is connected in parallel with a series circuit of the third resistor R3 and the fourth resistor R4, and the second capacitor C2 is connected in parallel at two ends of the second resistor R2. The second capacitor C2 is used to provide a stable voltage supply, i.e. provide stable energy, for the divided voltage of the resistor R5 and the resistor R6.

Similarly, a fifth resistor R5 is further disposed between the zener diode ZD1 and the first MOS transistor Q1 for voltage division, one end of the fifth resistor R5 is connected to a node between the zener diode ZD1 and the first MOS transistor Q1, and the other end is connected to the ground.

Specifically, in this embodiment, the second resistor R2 is used to immediately discharge electricity from the first capacitor C1 and the second capacitor C2 through the second resistor R2 after the power supply is turned off, so as to prevent the slow start power supply from being immediately powered on after the power supply is turned off, and because the first capacitor C1 and the second capacitor C2 have voltages, the first MOS transistor Q1 is still in a conducting state, so that the second MOS transistor Q2 is not conducting, the stroboscopic removal circuit 4 starts to operate in advance, and finally, the lamp is shaken during the slow start process. The diode D3 is used to ensure the discharging speed of the first capacitor C1 by directly discharging through the second resistor R2 without discharging through the first resistor R1.

In some embodiments, a diode D2 is further provided at the input of the time-delay shutdown circuit 5, and the diode D2 functions to rectify the current input to the time-delay shutdown circuit 5. The current entering the delay shutdown circuit 5 is rectified by the diode D2 and then output to the voltage dividing module 52 and the delay module 51.

In some embodiments, in the delay module 51 and the voltage dividing module 52, the resistance of the third resistor R3 and the resistance of the fourth resistor R4 may be adjusted according to the turn-on voltage of the second MOS transistor Q2. The voltage stabilizing value of the voltage stabilizing diode ZD1 of the delay module 51, the resistance value of the first resistor R1, and the capacity of the first capacitor C1 are adjusted according to the required slow start time of the device.

In this embodiment, the resistance of the first resistor R1 is 10M, the resistance of the second resistor is 47K, the resistance of the third resistor is 80K, the resistance of the fourth resistor is 10K, and the resistance of the fifth resistor is 1M; the capacitance of the first capacitor C1 is 4.7UF, the capacitance of the second capacitor C2 is 2.2UF, and the breakdown voltage of the zener diode is 4.7V.

As shown in fig. 1, the ground terminal of the integrated stroboscopic removing IC is connected to the negative electrode of the third capacitor C3 as a point B, and the input electrode of the second MOS transistor Q2 is connected to the output terminal of the stroboscopic removing circuit 4 as a point a.

In the embodiment, the specific principle that the delay shutdown circuit 5 controls the start-up time of the stroboscopic removing circuit 4 is as follows: after power IC starts, the input of time delay turn-off circuit 5 carries out the partial pressure through third resistance R3 and fourth resistance R4, make second MOS pipe Q2's grid voltage reach second MOS pipe Q2's opening voltage, second MOS pipe Q2 switches on, make short circuit intercommunication between A point and the B point, the earthing terminal that goes stroboscopic circuit 4 promptly and the output that goes stroboscopic circuit 4 between the short circuit intercommunication, thereby make and go stroboscopic circuit 4 short circuit, it stops work temporarily to go stroboscopic circuit 4. Meanwhile, the voltage on the first capacitor C1 is continuously charged through the resistor R1, and after the breakdown voltage of the zener diode ZD1 is reached, the gate voltage of the first MOS transistor Q1 reaches the starting voltage of the first MOS transistor Q1, the first MOS transistor Q1 is turned on, so that the gate voltage of the second MOS transistor Q2 is reduced to zero, the second MOS transistor Q2 is not turned on, and the short circuit connection between the point a and the point B is disconnected, so that the stroboscopic removing circuit 4 starts to work, and the stroboscopic removing effect of the lamp is achieved. Through a time difference of starting time of the slow starting circuit 3 and the stroboscopic removing circuit 4, the problem that the stroboscopic removing is easy to shake in the slow starting process is solved.

Example two

The implementation of this example is based on example 1.

An object of this embodiment is to provide a lamp including the slow start strobe-free dithering control circuit in the first embodiment.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A slow start stroboscopic-removing jitter control circuit is characterized by comprising an input circuit (1), an output circuit (2) and

the input end of the slow starting circuit (3) is connected with the output end of the input circuit (1);

the input end of the stroboscopic removing circuit (4) is connected with the output end of the slow starting circuit (3), and the output end of the stroboscopic removing circuit is connected with the input end of the output circuit (2); and

and the delay turn-off circuit (5) is connected between the output end of the stroboscopic removing circuit (4) and the grounding end so as to delay and start the stroboscopic removing circuit (4).

2. The slow start strobe dithering control circuit as claimed in claim 1, wherein the delay off circuit (5) comprises a first MOS transistor Q1, a second MOS transistor Q2 and a delay module (51); the grid electrode of the second MOS tube Q2 is connected with the output end of the input circuit (1), and the input electrode and the output electrode of the second MOS tube Q2 are respectively connected with the output end of the stroboscopic removing circuit (4) and the ground wire; the grid electrode of the first MOS tube Q1 is connected with the output end of the input circuit (1) through a time delay module (51), and the input electrode and the output electrode of the first MOS tube Q1 are respectively connected to the node of the grid electrode of the second MOS tube Q2 and the ground wire.

3. The slow start strobe dither control circuit of claim 2, wherein said delay block (51) includes a first resistor R1, a first capacitor C1, and a zener diode ZD 1; the first resistor R1 and the first capacitor C1 are connected in series; the input end of the zener diode ZD1 is connected to a node between the first resistor R1 and the first capacitor C1, and the output end of the zener diode ZD1 is connected to the gate of the first MOS transistor Q1.

4. The slow start strobe dithering control circuit of claim 3, wherein the delay block (51) further includes a second resistor R2 and a diode D3; the second resistor R2 is connected in parallel to two ends of the series circuit of the first resistor R1 and the first capacitor C1; the input end and the output end of the diode D3 are respectively connected to a node between the first resistor R1 and the first capacitor C1 and a node between the first resistor R1 and the second resistor R2.

5. The slow start stroboscopic flicker removing control circuit of claim 3, wherein a fifth resistor R5 is further disposed between the zener diode ZD1 and the first MOS transistor Q1, one end of the fifth resistor R5 is connected to a node between the zener diode ZD1 and the first MOS transistor Q1, and the other end of the fifth resistor R5 is connected to the ground line.

6. The slow start strobe dithering control circuit as claimed in any one of claims 2-5, characterized in that a diode D2 is provided at the input of the delay-off circuit (5).

7. The slow start stroboscopic dithering control circuit according to claim 2, wherein a voltage dividing module (52) is further disposed between the gate of the second MOS transistor Q2 and the output end of the input circuit (1); the voltage division module (52) comprises a second capacitor C2, a third resistor R3 and a fourth resistor R4; the third resistor R3 and the fourth resistor R4 are connected in series; the input end of a series circuit of the third resistor R3 and the fourth resistor R4 is connected with the output end of the input circuit (1), and the other end of the series circuit is connected with the ground wire; the second capacitor C2 is connected in parallel with the series circuit of the third resistor R3 and the fourth resistor R4; the gate of the second MOS transistor Q2 is connected to a node between the third resistor R3 and the fourth resistor R4.

8. The slow start strobe dither control circuit of claim 1, further characterized in that said slow start circuit (3) comprises an electrolytic capacitor C4, a sixth resistor R6 and a third capacitor C3, said electrolytic capacitor C4, inductor L and third capacitor C3 being connected in parallel.

9. The slow start strobe dither control circuit of claim 8, in which the strobe removal circuit (4) comprises an integrated strobe removal IC; the input end and the output end of the integrated stroboscopic removing IC are respectively connected with the output end of the slow starting circuit (3) and the input end of the output circuit (2), and the grounding end of the integrated stroboscopic removing IC is connected with the negative electrode of the third capacitor C3.

10. A light fixture comprising the slow start strobe dithering control circuit of any one of claims 1-9.