CN220731530U - LED driving circuit structure and driving chip sealed with LED lamp beads - Google Patents
LED driving circuit structure and driving chip sealed with LED lamp beads Download PDFInfo
- Publication number
- CN220731530U CN220731530U CN202322314405.XU CN202322314405U CN220731530U CN 220731530 U CN220731530 U CN 220731530U CN 202322314405 U CN202322314405 U CN 202322314405U CN 220731530 U CN220731530 U CN 220731530U
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- led
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- driving
- bracket
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- 239000011324 bead Substances 0.000 title claims abstract description 38
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of LED driving circuits, in particular to an LED driving circuit structure sealed with LED lamp beads and a driving chip, which comprises an anode bracket, a cathode bracket, an LED light-emitting chip, an LED driving chip and a plurality of packaging bonding wires, wherein the anode bracket is connected with an anode lead wire; the LED light-emitting chip and the LED driving chip are sealed on the cathode bracket; the LED light-emitting chip comprises an anode lead window and a cathode lead window; the LED driving chip comprises an input end lead window, an output end lead window and a grounding end lead window; the LED driving chip provides a constant current source for the LED light-emitting chip. The utility model uses one constant current driving chip to drive the anode of the LED lamp bead to realize that a universal LED lamp bead bracket is used for completing the sealing product of the constant current driving chip and the LED lamp bead, and the product can be driven by a wide range of voltage without changing the brightness of the LED lamp, and can reduce the cost.
Description
Technical Field
The utility model relates to the technical field of LED driving circuits, in particular to an LED driving circuit structure and a driving chip which are sealed with LED lamp beads.
Background
The LED lamp bead is a diode, and the current of the diode rises exponentially with the voltage at two ends of the diode, so that the diode cannot be driven at a constant voltage, and the LED lamp bead must be driven by a constant current source, namely an LED driving circuit. In practical applications, to further simplify the use and reduce the cost, the constant current driving lamp beads and the LED driving chips are usually sealed.
Because of the internal driving circuit, the sealing lamp bead can be externally applied with a wide voltage range to keep the brightness of the lamp bead unchanged.
However, the general LED driving chips are all cathodes for driving LED light emitting beads, and the cathodes of the LED light emitting beads are in direct contact with cathode supports in contact with cathode pads of the outer package of the beads in the conventional LED bead package. In order to realize the encapsulation, more than 2 special supports are required to be encapsulated, the LED encapsulation structure needs to be redesigned, and the cost is obviously increased.
Disclosure of Invention
The utility model aims at solving the problems in the background art, and provides an LED driving circuit structure and a driving chip which are sealed with LED lamp beads.
The technical scheme of the utility model is that the LED driving circuit structure sealed with the LED lamp beads comprises an anode bracket, a cathode bracket, an LED light-emitting chip, an LED driving chip and a plurality of packaging bonding wires, wherein the anode bracket is connected with an anode lead wire, and the cathode bracket is connected with a cathode lead wire;
the LED light-emitting chip and the LED driving chip are sealed on the cathode bracket;
the LED light-emitting chip comprises an anode lead window and a cathode lead window;
the LED driving chip comprises an input end lead window, an output end lead window and a grounding end lead window;
the output end lead window of the LED driving chip is connected with the anode lead window of the LED light-emitting chip through a packaging bonding wire;
the LED driving chip provides a constant current source for the LED light-emitting chip.
Preferably, the input lead window of the LED driving chip is connected with the anode bracket through a packaging bonding wire.
Preferably, the grounding end lead window of the LED driving chip and the negative electrode lead window of the LED light-emitting chip are grounded through the packaging bonding wire.
Preferably, the ground terminal of the LED driving chip and the cathode of the LED light emitting chip are at the same potential as the cathode lead.
The driving chip is sealed with the LED lamp beads and further comprises a high-side driving module, a low-side constant current source generating module and an internal power supply system;
the low-side constant current source generating module generates driving current;
the high-side driving module adopts a current mirror circuit to carry out equal proportion amplification on the current generated by the low-side constant current source generating module.
The internal power supply system supplies power to the low-side constant current source generating module and the high-side driving module.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. the utility model uses one constant current driving chip to drive the anode of the LED lamp bead to realize the use of a universal LED lamp bead bracket to finish the sealing product of the constant current driving chip and the LED lamp bead, and the product can be driven by a wide range of voltage without changing the brightness of the LED lamp almost; the driving chip adopts anode driving, so that a universal LED packaging bracket can be used, and the cost can be reduced.
2. The utility model adopts the scheme that the equal-proportion current source is amplified by N times to realize anode driving, and the scheme can realize that the forward conduction voltage drop of the combined and sealed LED lamp bead product is infinitely close to the conduction voltage drop of the LED lamp bead.
Drawings
FIG. 1 is a schematic view of an LED lamp bead package structure according to the present utility model;
fig. 2 is a circuit block diagram of the constant current driving chip of the present utility model.
Reference numerals: 1. an anode support; 2. a cathode support; 3. an LED light emitting chip; 31. a positive electrode lead window; 32. a negative electrode lead window; 4. an LED driving chip; 41. an input lead window; 42. an output end lead window; 43. a ground lead window; 44. a high-side drive module; 45. a low side constant current source generating module; 46. an internal power supply system; 5. and packaging the bonding wires.
Detailed Description
Example 1
As shown in fig. 1, the LED driving circuit structure provided by the utility model, which is sealed with LED lamp beads, comprises an anode bracket 1, a cathode bracket 2, an LED light emitting chip 3, an LED driving chip 4 and a plurality of packaging bonding wires 5, wherein the anode bracket 1 is connected with an anode lead, and the cathode bracket 2 is connected with a cathode lead;
in the present embodiment, the LED light emitting chip 3 includes a positive electrode lead window 31 and a negative electrode lead window 32, and the LED driving chip 4 includes an input terminal lead window 41, an output terminal lead window 42, and a ground terminal lead window 43;
the LED light-emitting chip 3 and the LED driving chip 4 are sealed on the cathode bracket 2; the output end lead window 42 of the LED driving chip 4 is connected with the positive electrode lead window 31 of the LED light-emitting chip 3 through the packaging bonding wire 5;
the LED driving chip 4 is used for providing a constant current power supply for the LED light-emitting chip 3;
in the present embodiment, the input terminal lead window 41 of the LED driving chip 4 is connected with the anode bracket 1 through the package bonding wire 5; the grounding end lead window 43 of the LED driving chip 4 and the negative electrode lead window 32 of the LED light emitting chip 3 are grounded through the packaging bonding wire 5; the ground terminal of the LED driving chip 4 and the cathode of the LED light emitting chip 3 are at the same potential as the cathode lead.
The utility model uses one constant current driving chip to drive the anode of the LED lamp bead to realize the use of a universal LED lamp bead bracket to finish the sealing product of the constant current driving chip and the LED lamp bead, and the product can be driven by a wide range of voltage without changing the brightness of the LED lamp almost; the driving chip adopts anode driving, so that a universal LED packaging bracket can be used, and the cost can be reduced.
Example 2
As shown in fig. 2, the utility model discloses a driving chip sealed with LED lamp beads, and the driving chip further comprises a high-side driving module 44, a low-side constant current source generating module 45 and an internal power supply system 46.
The low-side constant current source generating module 45 generates driving current, and the high-side driving module 44 adopts a current mirror circuit to amplify the current generated by the low-side constant current source generating module 45 in equal proportion; the internal power supply system 46 supplies power to the low-side constant current source generating module 45 and the high-side driving module 44.
In the present embodiment, the low-side constant current source generating module 45 is implemented by dividing a fixed voltage by a resistor. For the accuracy of the current, it can be realized by trimming the voltage or the resistance. While the corresponding high-side drive module 44 amplifies the current using a current mirror circuit; the high-side driving module 44 employs n+1 transistors, where N are connected in parallel to form a transistor B, and connected with 1 transistor a through their gates and sources to achieve equal-scale amplification of current by N times to achieve driving.
The utility model adopts the scheme that the equal-proportion current source is amplified by N times to realize anode driving, and the scheme can realize that the forward conduction voltage drop of the combined and sealed LED lamp bead product is infinitely close to the conduction voltage drop of the LED lamp bead.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (6)
1. The LED driving circuit structure sealed with the LED lamp beads comprises an anode bracket (1), a cathode bracket (2), an LED light-emitting chip (3), an LED driving chip (4) and a plurality of packaging bonding wires (5), and is characterized in that the anode bracket (1) is connected with an anode lead, and the cathode bracket (2) is connected with a cathode lead;
the LED light-emitting chip (3) and the LED driving chip (4) are sealed on the cathode bracket (2);
the LED light-emitting chip (3) comprises an anode lead window (31) and a cathode lead window (32);
the LED driving chip (4) comprises an input end lead window (41), an output end lead window (42) and a grounding end lead window (43);
the output end lead window (42) of the LED driving chip (4) is connected with the positive electrode lead window (31) of the LED light-emitting chip (3) through a packaging bonding wire (5);
the LED driving chip (4) provides a constant current source for the LED light emitting chip (3).
2. The LED driving circuit structure sealed with the LED lamp beads according to claim 1, wherein the input lead window (41) of the LED driving chip (4) is connected with the anode bracket (1) through the packaging bonding wire (5).
3. The LED driving circuit structure sealed with the LED lamp bead according to claim 1, wherein the ground terminal lead window (43) of the LED driving chip (4) and the negative electrode lead window (32) of the LED light emitting chip (3) are grounded through the package bonding wire (5).
4. The LED driving circuit structure sealed with the LED lamp beads according to claim 1, wherein the ground terminal of the LED driving chip (4) and the cathode lead of the LED light emitting chip (3) are at the same potential.
5. A driving chip sealed with the LED lamp bead, applied in the LED driving circuit structure according to any one of claims 1 to 4, further comprising a high-side driving module (44), a low-side constant current source generating module (45) and an internal power supply system (46);
a low-side constant current source generating module (45) for generating a driving current;
the high-side driving module (44) is used for carrying out equal-proportion amplification on the current generated by the low-side constant current source generating module (45);
an internal power supply system (46) supplies power to the low-side constant current source generating module (45) and the high-side driving module (44).
6. The driving chip sealed with the LED lamp beads according to claim 5, wherein the high-side driving module (44) uses a current mirror circuit to amplify the current generated by the low-side constant current source generating module (45) in equal proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322314405.XU CN220731530U (en) | 2023-08-25 | 2023-08-25 | LED driving circuit structure and driving chip sealed with LED lamp beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322314405.XU CN220731530U (en) | 2023-08-25 | 2023-08-25 | LED driving circuit structure and driving chip sealed with LED lamp beads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220731530U true CN220731530U (en) | 2024-04-05 |
Family
ID=90493345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322314405.XU Active CN220731530U (en) | 2023-08-25 | 2023-08-25 | LED driving circuit structure and driving chip sealed with LED lamp beads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220731530U (en) |
-
2023
- 2023-08-25 CN CN202322314405.XU patent/CN220731530U/en active Active
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