CN110828440A - Packaged LED integrated with constant current control chip - Google Patents
Packaged LED integrated with constant current control chip Download PDFInfo
- Publication number
- CN110828440A CN110828440A CN201910827947.2A CN201910827947A CN110828440A CN 110828440 A CN110828440 A CN 110828440A CN 201910827947 A CN201910827947 A CN 201910827947A CN 110828440 A CN110828440 A CN 110828440A
- Authority
- CN
- China
- Prior art keywords
- constant current
- current control
- control chip
- metal support
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims abstract description 52
- 239000000084 colloidal system Substances 0.000 claims abstract description 12
- 238000004021 metal welding Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 239000003292 glue Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a packaged LED integrated with a constant current control chip, which comprises: the LED constant current control module comprises an LED light-emitting chip, a first metal support used for mounting the LED light-emitting chip, a constant current control chip and a second metal support used for mounting the constant current control chip, wherein the LED light-emitting chip, the constant current control chip, the first metal support and the second metal support are electrically connected through wires, and the LED light-emitting chip, the constant current control chip, the first metal support, the second metal support and the wires are packaged through colloids; the first metal support and the second metal support are at least partially exposed out of the colloid to form an electrode of the packaged LED. Compared with the common LED product, the LED lamp does not need any other element outside, is simple and convenient to use, and can not cause the problem of brightness difference of the product due to inconsistent conduction voltage (VF value) of each LED light-emitting chip and the problem of brightness change due to power supply voltage change. The invention has the advantages of good brightness consistency, high reliability, more parallel lamp beads, longer product length and the like when being used integrally.
Description
The technical field is as follows:
the invention relates to the technical field of LED lamps, in particular to a packaged LED integrated with a constant current control chip.
Background art:
as shown in fig. 1, a plurality of common LEDs are connected in parallel to an electronic wire to complete an LED light string product on the market at present, and because of the existence of resistors between the electronic wires, the longer the line from the electronic wire to the load, the larger the series resistor is, and according to ohm's law U ═ I × R, the larger the resistor is, the larger the voltage drop is. As shown in fig. 2, assuming that the line resistance generated by each segment is 0.01 ohm, the current of each LED is 20mA, and the line resistance between the positive and negative of the first lamp is 0.02 ohm, the voltage across the 1 st lamp will generate 0.02 × 20 (0.4 mV), the voltage across the 2 nd lamp will generate (0.02 × 2) (20 × 2) (1.6 mV), and successively downwards, the voltage across the 50 th lamp will generate (0.02 × 50) (20 × 50) (1V), and assuming that the power supply voltage is 5V, the voltage across the 50 th lamp is only 4V, and the brightness of the 50 th lamp will be darker than that of the first lamp. The brightness uniformity of the LEDs will be much different, and if the 100 th lamp is connected in parallel later, the voltage drop will make the brightness of the LEDs more and more obvious (as shown in fig. 2). In addition, because the VF values of all the LEDs cannot be ensured to be consistent in the LED manufacturing process, under the condition that the voltage is relatively stable, the current flowing through each lamp bead is possibly inconsistent due to the VF value difference. When the fluctuation of the power voltage is unstable, the LED is easily burned out due to excessive current. Resulting in low reliability of the line.
The inventor of the present invention has continuously developed the following technical solutions to overcome the shortcomings of the existing products.
The invention content is as follows:
the technical problem to be solved by the invention is to overcome the defects in the prior art and provide a packaged LED integrated with a constant current control chip.
In order to solve the technical problems, the invention adopts the following technical scheme: a packaged LED integrated with a constant current control chip, the packaged LED comprising: the LED constant current control module comprises an LED light-emitting chip, a first metal support for mounting the LED light-emitting chip, a constant current control chip and a second metal support for mounting the constant current control chip, wherein the LED light-emitting chip, the constant current control chip, the first metal support and the second metal support are electrically connected through wires, and the LED light-emitting chip, the constant current control chip, the first metal support, the second metal support and the wires are packaged through colloids; the first metal support and the second metal support are at least partially exposed out of the colloid to form an electrode of the packaged LED.
Further, in the above technical solution, the lead includes: the first electrode lead is used for connecting the first metal bracket with one electrode of the LED light-emitting chip; the second electrode lead is used for connecting the other electrode of the LED light-emitting chip with one electrode of the constant current control chip; and the third electrode lead is used for connecting the other electrode of the constant current control chip with the second metal bracket.
Furthermore, in the above technical solution, the part of the first metal bracket exposed outside the glue body forms a metal leg of the packaged LED, which is used for connecting to the positive electrode of the power supply, and the first electrode lead is connected between the first metal bracket and the positive electrode of the LED light emitting chip; the part of the second metal support exposed out of the glue body forms a metal welding leg of the packaged LED, the metal welding leg is used for being connected to a negative electrode of a power supply, and the third lead is connected between the second metal support and the negative electrode of the constant current control chip; the second lead is connected between the negative electrode of the LED light-emitting chip and the positive electrode of the constant current control chip.
Further, in the above technical solution, the constant current control chip includes: the consumption transistors Q1 and Q4 and the conventional transistors Q2 and Q3, wherein the drain terminal of the consumption transistor Q1 is connected with the input terminal VIN, and the gate terminal is connected with the source terminal; the grid end and the drain end of the conventional tube Q2 are connected and connected with the source end of the drain tube Q1, and the source end of the conventional tube Q2 is grounded; the depletion tube Q1 and the conventional tube Q2 work together to generate an internal reference voltage Vref; the grid of the conventional tube Q3 is connected with Vref, and the source end and the drain end are grounded; although the gate of the Q4 is connected to Vref, the source terminal is grounded, and the drain terminal is connected to the input terminal VIN.
After the technical scheme is adopted, compared with a common LED product, the LED lamp does not need any other element outside, and is simple and convenient to use. The problem of brightness difference of products caused by inconsistent conduction voltage (VF value) of each LED light-emitting chip can be solved, and the problem of brightness change caused by power supply voltage change can be solved. In addition, on the same group of electronic wires, the packaged LEDs can be connected in parallel more, the product length can be longer, and the problem that the brightness of the front and the back of the lamp beads is inconsistent due to the voltage drop of the conducting wires in the transmission of the electronic wires is not worried about. The product has the advantages of good brightness consistency, high reliability, more parallel lamp beads, longer product length and the like when being used integrally.
Description of the drawings:
FIG. 1 is a circuit structure diagram of a conventional LED lamp string on the market;
FIG. 2 is a circuit diagram of the LED light string of FIG. 1 after calculating the circuit equivalent resistance;
FIG. 3 is a schematic perspective view of the present invention;
FIG. 4 is a front view of the present invention;
FIG. 5 is a side view of the present invention;
FIG. 6 is a schematic circuit diagram of an LED constant current chip according to the present invention;
FIG. 7 is a simplified schematic diagram of the invention after packaging;
fig. 8 is a schematic diagram of the circuit applied in the lamp string according to the present invention.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
The invention discloses a packaged LED integrated with a constant current control chip, which is shown in figures 3 to 5, and comprises: the LED constant current control device comprises an LED light-emitting chip 1, a first metal support 4 for mounting the LED light-emitting chip, a constant current control chip 2 and a second metal support 3 for mounting the constant current control chip 2, wherein the LED light-emitting chip 1, the constant current control chip 2, the first metal support 4 and the second metal support 3 are electrically connected through a wire, and the LED light-emitting chip 1, the constant current control chip 2, the first metal support 4, the second metal support 3 and the wire are packaged through a colloid 8; the first metal support 4 and the second metal support 3 are at least partially exposed out of the colloid 8 to form an electrode of the packaged LED.
Wherein, the wire includes: a first electrode lead 7 used for connecting the first metal bracket 4 with one electrode of the LED light-emitting chip 1; a second electrode lead 5 used for connecting the other electrode of the LED light-emitting chip 1 with one electrode of the constant current control chip 2; and a third electrode lead 6 for connecting the other electrode of the constant current control chip 2 with the second metal bracket 3.
Specifically, the part of the first metal bracket 4 exposed outside the colloid 8 forms a metal leg of the packaged LED, and is used for connecting to the positive electrode of a power supply, and the first electrode lead 7 is connected between the first metal bracket 4 and the positive electrode of the LED light-emitting chip 1;
the part of the second metal bracket 3 exposed outside the colloid 8 forms a metal welding leg of the packaged LED and is used for being connected to the negative electrode of a power supply, and the third lead 6 is connected between the second metal bracket 3 and the negative electrode of the constant current control chip 2;
and the second lead 5 is connected between the cathode of the LED light-emitting chip 1 and the anode of the constant current control chip 2.
As shown in fig. 6, this is a schematic diagram of an internal circuit of the constant current control chip 2, and includes: the consumption transistors Q1 and Q4 and the conventional transistors Q2 and Q3, wherein the drain terminal of the consumption transistor Q1 is connected with the input terminal VIN, and the gate terminal is connected with the source terminal; the grid end and the drain end of the conventional tube Q2 are connected and connected with the source end of the drain tube Q1, and the source end of the conventional tube Q2 is grounded; the depletion tube Q1 and the conventional tube Q2 work together to generate an internal reference voltage Vref; the grid of the conventional tube Q3 is connected with Vref, and the source end and the drain end are grounded; although the gate of the Q4 is connected to Vref, the source terminal is grounded, and the drain terminal is connected to the input terminal VIN.
As shown in fig. 6, the operation principle of the constant current control chip 2 is as follows: although the two transistors Q1 and Q2 cooperate to generate the internal reference voltage Vref, since G and S of Q1(M237) are connected and VGS is 0, a constant reference current Iref is generated. G and D of a conventional tube Q2(M2) are connected, VGS (namely Vref) is constant because current is constant, and the temperature coefficient can be adjusted by adjusting the width-length ratio of the upper tube and the lower tube. The conventional tube Q3(M266) is a conventional tube, the grid is connected with Vref, the source end and the drain end are grounded, and the low-pass filtering capacitor from the reference voltage Vref to the ground is provided. Although the gate of Q4(M272) is connected with Vref, the source end is connected with ground, and the drain end is connected with VIN; although the Q4 is used as an output power tube, the reference voltage Vref is fixed, and the output current is constant without considering the channel modulation effect.
As shown in fig. 7, which is a simplified schematic diagram of a packaging circuit of the present invention, an LED light emitting chip 1 and a constant current control chip 2 are connected in series, a positive electrode of the LED light emitting chip 1 is connected to a positive electrode (+) of an external power supply, a negative electrode of the LED light emitting chip 1 is connected to an input port (VIN) of the constant current control chip 2, and a negative electrode (GND) of the constant current control chip 2 is connected to a negative electrode (-) of the external power supply. The light emitting chips and the constant current control chip in the packaged LED are packaged into a complete integrated electronic element, the current of the LED light emitting chips is controlled by the constant current control chip, the current flowing through each LED light emitting chip in an application product can be guaranteed to be consistent and the brightness is consistent under the condition that the voltage of an external power supply fluctuates or changes, and the internal constant current control chip can also perform overcurrent protection and overheat protection on the LED light emitting chips so as to improve the stability of the LED lamp bead.
As shown in fig. 8, after the single packaged LED shown in fig. 7 is connected in parallel to an electronic line (e.g., a lamp string product) and power is supplied to the electronic line, the LED light emitting chip inside each new LED can constantly control the flowing current through the constant current control chip, so as to ensure the brightness of all the new LEDs to be consistent. And when the number of parallel points is more, under the condition that the voltage at the tail end is slowly reduced, the novel LED can ensure that the current of the internal LED light-emitting chip is consistent. Meanwhile, an overheating and overcurrent protection circuit is arranged in the constant current control chip to prevent the light-emitting chip from being damaged by overcurrent and overheating.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, and all equivalent changes or modifications in the structure, characteristics, and principles of the present invention as described in the claims of the present invention should be included in the claims of the present invention.
Claims (4)
1. A packaged LED integrated with a constant current control chip, comprising: the packaged LED includes: the LED constant current control module comprises an LED light-emitting chip (1), a first metal support (4) for mounting the LED light-emitting chip, a constant current control chip (2) and a second metal support (3) for mounting the constant current control chip (2), wherein the LED light-emitting chip (1), the constant current control chip (2), the first metal support (4) and the second metal support (3) are electrically connected through a wire, and the LED light-emitting chip (1), the constant current control chip (2), the first metal support (4), the second metal support (3) and the wire are packaged through a colloid (8);
the first metal support (4) and the second metal support (3) are at least partially exposed out of the colloid (8) to form an electrode of the packaged LED.
2. The packaged LED integrated with a constant current control chip according to claim 1, wherein: the lead comprises: a first electrode lead (7) used for connecting the first metal bracket (4) with one electrode of the LED light-emitting chip (1); a second electrode lead (5) used for connecting the other electrode of the LED light-emitting chip (1) with one electrode of the constant current control chip (2); and a third electrode lead (6) used for connecting the other electrode of the constant current control chip (2) with the second metal bracket (3).
3. The packaged LED integrated with a constant current control chip according to claim 2, wherein: the part of the first metal support (4) exposed out of the colloid (8) forms a metal welding leg of the packaged LED and is used for being connected to the positive electrode of a power supply, and the first electrode lead (7) is connected between the first metal support (4) and the positive electrode of the LED light-emitting chip (1);
the part of the second metal support (3) exposed out of the colloid (8) forms a metal welding leg of the packaged LED and is used for being connected to the negative electrode of a power supply, and the third lead (6) is connected between the second metal support (3) and the negative electrode of the constant current control chip (2);
the second lead (5) is connected between the cathode of the LED light-emitting chip (1) and the anode of the constant current control chip (2).
4. The packaged LED integrated with a constant current control chip according to any one of claims 1 to 3, wherein: the constant current control chip (2) comprises: the consumption transistors Q1 and Q4 and the conventional transistors Q2 and Q3, wherein the drain terminal of the consumption transistor Q1 is connected with the input terminal VIN, and the gate terminal is connected with the source terminal; the grid end and the drain end of the conventional tube Q2 are connected and connected with the source end of the drain tube Q1, and the source end of the conventional tube Q2 is grounded; the depletion tube Q1 and the conventional tube Q2 work together to generate an internal reference voltage Vref;
the grid of the conventional tube Q3 is connected with Vref, and the source end and the drain end are grounded;
although the gate of the Q4 is connected to Vref, the source terminal is grounded, and the drain terminal is connected to the input terminal VIN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910827947.2A CN110828440A (en) | 2019-09-03 | 2019-09-03 | Packaged LED integrated with constant current control chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910827947.2A CN110828440A (en) | 2019-09-03 | 2019-09-03 | Packaged LED integrated with constant current control chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110828440A true CN110828440A (en) | 2020-02-21 |
Family
ID=69548098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910827947.2A Pending CN110828440A (en) | 2019-09-03 | 2019-09-03 | Packaged LED integrated with constant current control chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110828440A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1145063A (en) * | 1978-03-08 | 1983-04-19 | Kanji Yoh | Reference voltage generator device |
| JP2002368107A (en) * | 2001-06-07 | 2002-12-20 | Ricoh Co Ltd | Reference voltage generator circuit and power source using the same |
| US20030234680A1 (en) * | 2002-05-29 | 2003-12-25 | Ricardo Erckert | Reference voltage circuit and method of generating a reference voltage |
| JP2004252886A (en) * | 2003-02-21 | 2004-09-09 | Toshiba Corp | Reference voltage generation circuit |
| JP2005301409A (en) * | 2004-04-07 | 2005-10-27 | Ricoh Co Ltd | Constant current circuit |
| JP2007226710A (en) * | 2006-02-27 | 2007-09-06 | Ricoh Co Ltd | Constant current circuit and constant voltage circuit |
| CN201273466Y (en) * | 2008-05-18 | 2009-07-15 | 杨松伟 | Constant-current LED |
| CN107143771A (en) * | 2017-05-05 | 2017-09-08 | 赵红春 | A kind of constant current LED lamp string |
| CN206960995U (en) * | 2017-07-13 | 2018-02-02 | 上海南麟电子股份有限公司 | One kind exhausts pipe reference current source circuit |
| KR20180061685A (en) * | 2016-11-30 | 2018-06-08 | 이정문 | Led driver ic and led package with embedded driver ic |
| CN207880485U (en) * | 2018-03-14 | 2018-09-18 | 无锡永友电子有限公司 | A kind of COB lamp plates |
| CN108712807A (en) * | 2018-08-03 | 2018-10-26 | 江西美的贵雅照明有限公司 | The driving circuit of light emitting diode |
-
2019
- 2019-09-03 CN CN201910827947.2A patent/CN110828440A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1145063A (en) * | 1978-03-08 | 1983-04-19 | Kanji Yoh | Reference voltage generator device |
| JP2002368107A (en) * | 2001-06-07 | 2002-12-20 | Ricoh Co Ltd | Reference voltage generator circuit and power source using the same |
| US20030234680A1 (en) * | 2002-05-29 | 2003-12-25 | Ricardo Erckert | Reference voltage circuit and method of generating a reference voltage |
| JP2004252886A (en) * | 2003-02-21 | 2004-09-09 | Toshiba Corp | Reference voltage generation circuit |
| JP2005301409A (en) * | 2004-04-07 | 2005-10-27 | Ricoh Co Ltd | Constant current circuit |
| JP2007226710A (en) * | 2006-02-27 | 2007-09-06 | Ricoh Co Ltd | Constant current circuit and constant voltage circuit |
| CN201273466Y (en) * | 2008-05-18 | 2009-07-15 | 杨松伟 | Constant-current LED |
| KR20180061685A (en) * | 2016-11-30 | 2018-06-08 | 이정문 | Led driver ic and led package with embedded driver ic |
| CN107143771A (en) * | 2017-05-05 | 2017-09-08 | 赵红春 | A kind of constant current LED lamp string |
| CN206960995U (en) * | 2017-07-13 | 2018-02-02 | 上海南麟电子股份有限公司 | One kind exhausts pipe reference current source circuit |
| CN207880485U (en) * | 2018-03-14 | 2018-09-18 | 无锡永友电子有限公司 | A kind of COB lamp plates |
| CN108712807A (en) * | 2018-08-03 | 2018-10-26 | 江西美的贵雅照明有限公司 | The driving circuit of light emitting diode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080025024A1 (en) | Parallel-series led light string | |
| US20080024071A1 (en) | Bypass components in series wired led light strings | |
| US7211967B2 (en) | Strip light with constant current | |
| CN105072742B (en) | A kind of high-voltage linear constant current LED drive circuit | |
| CN107277962B (en) | Current control circuit | |
| TWI594659B (en) | Current control circuit for driving circuit system of led device | |
| TWM485583U (en) | Resistot type light adjusting circuit | |
| CN109068447A (en) | LED filament and LED light | |
| CN110828440A (en) | Packaged LED integrated with constant current control chip | |
| CN201269446Y (en) | Constant-current lamp strip apparatus | |
| CN210575944U (en) | Packaged LED integrated with constant current control chip | |
| CN210469821U (en) | Constant current driving circuit for car lamp | |
| CN107295721B (en) | LED drive circuit and LED electric indicator lamp | |
| CN207543377U (en) | A kind of Dimmable LED constant-current drive circuit | |
| CN210372970U (en) | LED lamp string capable of emitting light on whole body | |
| CN215871919U (en) | Two-wire system PWM changes constant current module of adjusting luminance | |
| CN107148125A (en) | A kind of linear constant current infrared LED driving chip | |
| CN114423118A (en) | Three-in-one dimming circuit and LED lighting system | |
| CN209787527U (en) | Device for solving flicker of LED dimming lamp | |
| CN103199831A (en) | Electric heating interval control device | |
| CN201853155U (en) | Precision constant-current source circuit module | |
| CN206879155U (en) | A kind of linear constant current infrared LED driving chip | |
| TWI665936B (en) | Dimming control circuit | |
| CN204350371U (en) | Led light adjusting circuit | |
| US11751301B2 (en) | LED driving circuit and LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |