An adapter and an LED driving system having the adapter

Abstract

The present invention discloses an adapter and an LED driving system with the adapter. The adapter includes an isolated constant current and constant voltage circuit. The first end of the primary side of a transformer L1 of the isolated constant current and constant voltage circuit is connected to the positive electrode of a diode D1, the negative electrode of the diode D1 is connected to the negative electrode of a diode D2, the positive electrode of the diode D2 is connected to the second end of the primary side of the transformer L1, the first end of the secondary side of the transformer L1 is connected to the positive electrode of a diode D3, the second end of the secondary side of the transformer L1 is connected to the positive electrode of a diode D4, the negative electrode of the diode D4 is connected to the negative electrode of the diode D3, the capacitor C2 is connected between the third end of the secondary side of the transformer L1 and the negative electrode of the diode D3, the resistor R1 is connected in parallel to both ends of the capacitor C2, the capacitor C3 is connected in parallel to both ends of the resistor R1, and the third end of the secondary side of the transformer L1 is grounded through the capacitor C4. The present invention outputs different constant voltage and constant current values ​​through the adapter, which is convenient for driving different types of LED lamp groups and reduces the cost of driving the LED lamp groups.

Description

Technical Field

[0001] The present invention relates to the field of LED driving, and in particular to an adapter and an LED driving system having the adapter. Background Art

[0002] With the development of science and technology, in the field of lighting, most of the current society uses LED lights for lighting, which have the characteristics of energy saving, environmental protection, high luminous intensity and high luminous efficiency. In the planting industry, there is a design to use LED lights to supplement light at night to increase production. However, the power of the LED light group used for this kind of supplementary light is often very large. For example, the power of some LED supplementary light equipment reaches 600W.

[0003] LED drivers require LED driver power supplies, which are high-power LED drivers and are often very expensive. Different LED light groups have different corresponding LED driver power supplies, so each LED light group needs to be matched with the corresponding LED driver power supply, which cannot be compatible with each other, further increasing the price of the LED driver power supply used. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to provide an adapter and an LED driving system with the adapter, to solve the incompatibility problem of different LED driving power supplies through the adapter, to drive the LED lamp group in combination with the relatively cheap existing LED driving power supply, thereby reducing the cost of driving the LED lamp group; to replace the LED driving power supply by combining the adapter with the existing ballast structure, thereby further reducing the cost of driving the LED lamp group.

[0005] The technical solution adopted by the present invention to solve the above problem is: an adapter, the adapter contains an isolated constant current and constant voltage circuit, the isolated constant current and constant voltage circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, a transient voltage regulator diode D1, a transient voltage regulator diode D2, a diode D3, a diode D4 and a transformer L1, the first end of the primary side of the transformer L1 is connected to the positive electrode of the transient voltage regulator diode D1, the negative electrode of the transient voltage regulator diode D1 is connected to the negative electrode of the transient voltage regulator diode D2, and the transient voltage regulator The anode of the voltage-voltage diode D2 is connected to the second end of the primary side of the transformer L1, the first end of the secondary side of the transformer L1 is connected to the anode of the diode D3, the second end of the secondary side of the transformer L1 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the cathode of the diode D3, the capacitor C2 is connected between the third end of the secondary side of the transformer L1 and the cathode of the diode D3, the resistor R1 is connected in parallel to both ends of the capacitor C2, the capacitor C3 is connected in parallel to both ends of the resistor R1, and the third end of the secondary side of the transformer L1 is grounded through the capacitor C4.

[0006] Compared with the prior art, the advantages of the present invention are: by designing different transformer parameters in the adapter and combining the circuit to achieve different constant voltage and constant current values ​​under the same output power drive, so as to drive different types of LED lamp groups, thereby reducing the cost of driving the LED lamp groups.

[0007] Preferably, the isolated constant current and constant voltage circuit also includes a feedback regulation circuit, which includes a chip IC1, a MOS tube Q1, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C5, a voltage regulator diode D5, a diode D6 and an inductor L2, the cathode of the diode D3 is connected to the D pole of the MOS tube, the S pole of the MOS tube is connected to the positive end of the capacitor C3 through the series resistor R3 and the inductor L2, the first pin of the chip IC1 is connected to the first end of the resistor R3, the first end of the resistor R3 is also connected to the cathode of the diode D6, the anode of the diode D6 is connected to the third end of the secondary side of the transformer L1, and the first pin of the chip IC1 is connected to the capacitor C3 through the series resistor R8 and the resistor R7. The positive terminal of the chip IC1 is connected, the first pin of the chip IC1 is connected to the negative terminal of the capacitor C5, the positive terminal of the capacitor C5 is connected to the negative terminal of the diode D4 through the series resistor R6 and the resistor R5, the negative terminal of the capacitor C5 is connected to the positive terminal of the Zener diode D5, the positive terminal of the capacitor C5 is connected to the negative terminal of the Zener diode D5, the first pin of the chip IC1 is connected to the fifth pin of the chip IC1, the second pin of the chip IC1 is connected to the G terminal of the MOS tube Q1, the third pin of the chip IC1 is connected to the S terminal of the MOS tube Q1, the fourth pin of the chip IC1 is connected to the connection end of the resistor R7 and the resistor R8, the sixth pin of the chip IC1 is connected to the positive terminal of the capacitor C5, and the resistor R2 is connected in parallel to both ends of the capacitor C3.

[0008] In this way, a feedback regulation circuit is added, and the entire isolated constant current and constant voltage circuit can output an LED driving power that is less than or equal to the input power to drive the LED lamp group, thereby meeting the requirement of being able to drive LED lamp groups of various driving powers and realizing batch application.

[0009] The present invention also adopts a technical solution to solve the above problem: an LED driving system with the above adapter also includes a ballast and an LED lamp group, the adapter is arranged between the ballast and the LED lamp group, the first end of the ballast output is connected to the first end of the primary side of the transformer L1 through the capacitor C1, the second end of the ballast output is connected to the second end of the primary side of the transformer L1, and the LED lamp group is connected between the third end of the secondary side of the transformer L1 and the positive terminal of the capacitor C3.

[0010] In this way, the existing ballast is combined with the adapter to replace the original LED driving power supply, thereby reducing the cost of driving the LED lamp group.

[0011] Preferably, the positive terminal of the capacitor C3 is connected to the positive terminal of the LED lamp group, the third terminal of the secondary side of the transformer L1 is connected to the negative terminal of the LED lamp group, and the LED lamp group includes a plurality of LED lamp branches connected in parallel, and each of the LED lamp branches includes a plurality of LED lamps connected in series in sequence. In this way, through the connection mode of series and parallel connection, multiple LEDs can be integrated, and then large-scale integration of LED lamp groups can be achieved, the connection mode is simple, and overall lighting is convenient.

[0012] Preferably, the ballast is connected to the adapter via a first connector, and the adapter is connected to the LED lamp group via a second connector. Thus, by providing the first connector and the second connector, it is convenient to replace different types of adapters to achieve driving of different LED lamp groups, which is easy to operate and simple to connect.

[0013] Preferably, the LED lamp group includes an LED lamp holder and an LED driving circuit, the adapter is placed in the LED lamp holder, a first connector and a second connector are provided between the ballast and the adapter, the ballast is electrically connected to the second connector via the first connector, and the second connector is electrically connected to the adapter. In this way, the adapter with feedback adjustment function is arranged inside the LED lamp group, so as to improve the integration of the LED driving system and avoid excessive connections. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment of an LED driving system of the present invention;

[0015] Figure 2 It is a circuit diagram of an embodiment of an isolated constant current and constant voltage circuit in an adapter;

[0016] Figure 3 is a schematic structural diagram of another embodiment of an LED driving system of the present invention;

[0017] Figure 4 It is a circuit diagram of another embodiment of an isolated constant current and constant voltage circuit in an adapter.

[0018] Explanation of the numbers in the figure: 1. ballast, 2. LED lamp group, 21. LED lamp holder, 22. LED driving circuit, 3. adapter, 4. first connector, 5. second connector. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0020] Embodiment 1

[0021] See also Figure 1 As shown, this embodiment relates to an LED driving system, including a ballast 1, an adapter 3 and an LED lamp group 2, wherein the adapter 3 is arranged between the ballast 1 and the LED lamp group 2. By combining the existing ballast 1 with the adapter 3 to replace the original LED driving power supply, the cost of driving the LED lamp group is reduced.

[0022] The ballast 1 is connected to the adapter 3 via a first connector 4, and the adapter 3 is connected to the LED lamp group 2 via a second connector 5. By providing the first connector 4 and the second connector 5, it is convenient to replace different types of adapters 3 to achieve driving of different LED lamp groups 2, which is easy to operate and simple to connect.

[0023] See also Figure 2 As shown, in this embodiment, the adapter 3 includes an isolated constant current and constant voltage circuit, which includes capacitor C1, capacitor C2, capacitor C3, capacitor C4, resistor R1, transient voltage regulator diode D1, transient voltage regulator diode D2, diode D3, diode D4 and transformer L1. The specific circuit connection is as follows:

[0024] The first end of the ballast 1 output is connected to the first end of the primary side of the transformer L1 through the capacitor C1, and the second end of the ballast 1 output is connected to the second end of the primary side of the transformer L1. In this process, filtering is performed through the capacitor C1.

[0025] The first end of the primary side of the transformer L1 is connected to the positive electrode of the transient voltage zener diode D1, the negative electrode of the transient voltage zener diode D1 is connected to the negative electrode of the transient voltage zener diode D2, and the positive electrode of the transient voltage zener diode D2 is connected to the second end of the primary side of the transformer L1. Transient voltage zener diodes D1 and D2 are added at both ends of the primary side of the transformer L1 to eliminate the high voltage from the ballast 1.

[0026] The first end of the secondary side of the transformer L1 is connected to the positive electrode of the diode D3, the second end of the secondary side of the transformer L1 is connected to the positive electrode of the diode D4, and the negative electrode of the diode D4 is connected to the negative electrode of the diode D3. The capacitor C2 is connected between the third end of the secondary side of the transformer L1 and the negative electrode of the diode D3, the resistor R1 is connected in parallel to both ends of the capacitor C2, the capacitor C3 is connected in parallel to both ends of the resistor R1, and the third end of the secondary side of the transformer L1 is grounded through the capacitor C4.

[0027] The LED lamp set 2 is connected between the third terminal of the secondary side of the transformer L1 and the positive terminal of the capacitor C3 .

[0028] In this embodiment, the power output by the ballast 1 can be converted into the power required by the LED lamp group 2 through the isolated constant current and constant voltage circuit inside the adapter 3. In this process, the power required to drive the LED lamp group 2 is consistent with the power output by the ballast 1, and the output constant current and constant voltage can be controlled by changing the turns ratio of different transformers L1.

[0029] At the same time, for the connection of the LED lamp group 2, the positive terminal of the capacitor C3 is connected to the positive terminal of the LED lamp group 2, and the third terminal of the secondary side of the transformer L1 is connected to the negative terminal of the LED lamp group 2. The circuit inside the LED lamp group 2 includes multiple LED lamp branches connected in parallel, and each LED lamp branch includes multiple LED lamps connected in series in sequence. Through this mutual series-parallel connection mode, multiple LEDs can be integrated, and then large-scale integration of the LED lamp group 2 can be achieved. The connection mode is simple and convenient for overall lighting.

[0030] In the above process, the adapter 3 can also be used as a separate connector to adjust the output voltage and current of the LED driving power supply to achieve various types of driving. By designing different transformer parameters in the adapter 3 and combining the circuit, different constant voltage and constant current values ​​can be output under the same output power drive to drive different types of LED lamp groups 2, thereby reducing the cost of driving the LED lamp groups 2.

[0031] Embodiment 2

[0032] See also Figure 3-4 As shown, the present application also relates to another embodiment, whose connection mode and structure are basically consistent with the embodiment 1, except that: this embodiment also includes a feedback regulation circuit, and the installation position of the adapter 3 is different.

[0033] See also Figure 3 As shown, the LED lamp set 2 includes an LED lamp holder 21 and an LED driving circuit 22, and the adapter 3 is placed in the LED lamp holder 21. A first connector 4 and a second connector 5 are provided between the ballast 1 and the adapter 3, and the ballast 1 is electrically connected to the second connector 5 through the first connector 4, and the second connector 5 is electrically connected to the adapter 3.

[0034] In this embodiment, the adapter 3 has a feedback regulation function. The output power of the ballast 1 can output an LED driving power that is less than or equal to the output power of the ballast 1 after feedback regulation by the adapter 3, which has a wider application range and can greatly reduce the cost required for LED driving.

[0035] The adapter 3 is arranged inside the LED lamp group 2 to improve the integration of the LED driving system and avoid excessive connections. The ballast 1 can directly find the adapter 3 interface on the LED lamp group 2 to achieve connection without having to find an adapter 3 of corresponding power for connection.

[0036] In this embodiment, the feedback regulation circuit includes a chip IC1, a MOS tube Q1, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C5, a voltage stabilizing diode D5, a diode D6 and an inductor L2. The feedback regulation circuit is specifically connected as follows:

[0037] The cathode of the diode D3 is connected to the D pole of the MOS tube, and the S pole of the MOS tube is connected to the positive terminal of the capacitor C3 through the series resistor R3 and the inductor L2.

[0038] The first pin of the chip IC1 is connected to the first end of the resistor R3, the first end of the resistor R3 is also connected to the negative electrode of the diode D6, the positive electrode of the diode D6 is connected to the third end of the secondary side of the transformer L1, the first pin of the chip IC1 is connected to the positive end of the capacitor C3 through the series resistor R8 and the resistor R7, the first pin of the chip IC1 is connected to the negative end of the capacitor C5, the positive end of the capacitor C5 is connected to the negative electrode of the diode D4 through the series resistor R6 and the resistor R5, the negative end of the capacitor C5 is connected to the positive electrode of the Zener diode D5, the positive end of the capacitor C5 is connected to the negative electrode of the Zener diode D5, the first pin of the chip IC1 is connected to the fifth pin of the chip IC1, the second pin of the chip IC1 is connected to the G electrode of the MOS tube Q1, the third pin of the chip IC1 is connected to the S electrode of the MOS tube Q1, the fourth pin of the chip IC1 is connected to the connection end of the resistor R7 and the resistor R8, the sixth pin of the chip IC1 is connected to the positive end of the capacitor C5, and the resistor R2 is connected in parallel to both ends of the capacitor C3.

[0039] In this process, the chip IC1 collects the current across the resistor R3, and then combines the resistors R7 and R8 to output the corresponding constant voltage value. The chip IC1 has an adjustment function, so that the power of the isolated constant current and constant voltage circuit outputting the driving LED lamp group 2 can be less than or equal to the output power of the ballast 1.

[0040] The adapter 3 in this embodiment can also be used as a separate connector to adjust the output voltage and current of the LED driving power supply to achieve various types of driving. Through the feedback adjustment function of the chip IC1 in the isolated constant current and constant voltage circuit inside the adapter 3, one adapter 3 can drive various LED lamp groups 2 with different driving powers, thereby reducing the cost of driving the LED lamp group 2.

[0041] The beneficial effect of the present invention is: by designing different transformer parameters in the adapter 3 and combining the circuit to achieve different constant voltage and constant current values ​​under the same output power drive, different types of LED lamp groups 2 can be driven, thereby reducing the cost of driving the LED lamp group 2.

[0042] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An adapter, characterized in that: The adapter (3) includes an isolated constant current and constant voltage circuit, which includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, a transient voltage regulator diode D1, a transient voltage regulator diode D2, a diode D3, a diode D4 and a transformer L1, wherein the first end of the primary side of the transformer L1 is connected to the positive electrode of the transient voltage regulator diode D1, the negative electrode of the transient voltage regulator diode D1 is connected to the negative electrode of the transient voltage regulator diode D2, the positive electrode of the transient voltage regulator diode D2 is connected to the second end of the primary side of the transformer L1, the first end of the secondary side of the transformer L1 is connected to the positive electrode of the diode D3, and the The second end of the secondary side of the transformer L1 is connected to the positive electrode of the diode D4, the negative electrode of the diode D4 is connected to the negative electrode of the diode D3, the capacitor C2 is connected between the third end of the secondary side of the transformer L1 and the negative electrode of the diode D3, the resistor R1 is connected in parallel to both ends of the capacitor C2, and the third end of the secondary side of the transformer L1 is grounded through the capacitor C4; the isolated constant current and constant voltage circuit also includes a feedback regulation circuit, which includes a chip IC1, a MOS tube Q1, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C5, a voltage regulator diode D5, a diode D6 and an inductor L2, the cathode of the diode D3 is connected to the D electrode of the MOS tube, the S electrode of the MOS tube is connected to the positive terminal of the capacitor C3 through the series resistor R3 and the inductor L2, the first pin of the chip IC1 is connected to the first end of the resistor R3, the first end of the resistor R3 is also connected to the cathode of the diode D6, the anode of the diode D6 is connected to the third end of the secondary side of the transformer L1, the first pin of the chip IC1 is connected to the positive terminal of the capacitor C3 through the series resistor R8 and the resistor R7, the first pin of the chip IC1 is connected to the negative terminal of the capacitor C5, the positive terminal of the capacitor C5 is connected to the series resistor R6 The resistor R5 is connected to the cathode of the diode D4, the cathode of the capacitor C5 is connected to the anode of the voltage-stabilizing diode D5, the anode of the capacitor C5 is connected to the cathode of the voltage-stabilizing diode D5, the first pin of the chip IC1 is connected to the fifth pin of the chip IC1, the second pin of the chip IC1 is connected to the G pole of the MOS tube Q1, the third pin of the chip IC1 is connected to the S pole of the MOS tube Q1, the fourth pin of the chip IC1 is connected to the connection end of the resistor R7 and the resistor R8, the sixth pin of the chip IC1 is connected to the anode of the capacitor C5, and the resistor R2 is connected in parallel to both ends of the capacitor C3.

2. An LED driving system having an adapter according to claim 1, characterized in that: It also comprises a ballast (1) and an LED lamp group (2), wherein the adapter (3) is arranged between the ballast (1) and the LED lamp group (2), the first end of the output of the ballast (1) is connected to the first end of the primary side of the transformer L1 through the capacitor C1, the second end of the output of the ballast (1) is connected to the second end of the primary side of the transformer L1, and the LED lamp group (2) is connected between the third end of the secondary side of the transformer L1 and the positive terminal of the capacitor C3.

3. The LED driving system according to claim 2, characterized in that: The positive terminal of the capacitor C3 is connected to the positive terminal of the LED lamp group (2), and the third terminal of the secondary side of the transformer L1 is connected to the negative terminal of the LED lamp group (2). The LED lamp group (2) comprises a plurality of LED lamp branches connected in parallel to each other, and each of the LED lamp branches comprises a plurality of LED lamps connected in series in sequence.

4. The LED driving system according to claim 2, characterized in that: The ballast (1) is connected to the adapter (3) via a first connector (4), and the adapter (3) is connected to the LED lamp group (2) via a second connector (5).

5. The LED driving system according to claim 2, characterized in that: The LED lamp group (2) comprises an LED lamp frame (21) and an LED driving circuit (22); the adapter (3) is placed in the LED lamp frame (21); a first connector (4) and a second connector (5) are provided between the ballast (1) and the adapter (3); the ballast (1) is electrically connected to the second connector (5) via the first connector (4); and the second connector (5) is electrically connected to the adapter (3).

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