CN102548116A - Constant current device, chip packaging piece and lamp thereof - Google Patents
Constant current device, chip packaging piece and lamp thereof Download PDFInfo
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- CN102548116A CN102548116A CN2011100605301A CN201110060530A CN102548116A CN 102548116 A CN102548116 A CN 102548116A CN 2011100605301 A CN2011100605301 A CN 2011100605301A CN 201110060530 A CN201110060530 A CN 201110060530A CN 102548116 A CN102548116 A CN 102548116A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims description 30
- 230000005669 field effect Effects 0.000 claims description 21
- 229910044991 metal oxide Inorganic materials 0.000 claims description 20
- 150000004706 metal oxides Chemical class 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000003071 parasitic effect Effects 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1306—Field-effect transistor [FET]
- H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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Abstract
The invention provides a constant current device, a chip packaging piece and a lamp thereof. The first constant current circuit comprises a first constant current element and a Zener diode, and the first constant current element is connected in inverse parallel. The second constant current circuit comprises a second constant current element which is connected with the downstream side of the first constant current element in the same direction. When the input voltage is greater than the breakdown voltage of the Zener diode, the Zener diode can consume a larger proportion of power, and the second constant current circuit plays a role in limiting current, so that the constant current device can bear higher voltage.
Description
Technical field
The present invention is relevant a kind of decide current device, chip package and light fixture thereof, particularly a kind of can bear high voltage decide current device, chip package and light fixture thereof.
Background technology
(light-emitting diode LED) has that volume is little, an advantage such as long service life and power saving to light-emitting diode, so light-emitting diode has been widely used in purposes such as multiple illumination and decoration.Please with reference to Fig. 1, a kind of existing light-emitting diode framework with dc powered be with AC power AC1, that AC2 converts alternating current into direct current through a rectification circuit 11 is after-applied in light-emitting diode 13.For fear of light-emitting diode 13 problem intermittently luminous along with the change in voltage of alternating current, can be in the output cross-over connection one electric capacity of voltage regulation C and a discharge resistance R of rectification circuit 11, to stablize the output voltage of rectification circuit 11.Owing to the size of electric current can change along with the variation of voltage, therefore, a constant-current circuit 12 can be set again be connected in series, with the maximum of restriction electric current and then avoid light-emitting diode 13 to burn with light-emitting diode 13.
Yet, to decide under the situation of electric current, the power that light-emitting diode 13 and constant-current circuit 12 are consumed is directly proportional with the voltage of cross-over connection in the element two ends.In other words, the power that light-emitting diode 13 is consumed more after a little while, the consumed power of larger proportion then drops on the constant-current circuit 12.Because semiconductor element and packaged chip have its maximum withstand voltage (maximum operation voltage), therefore, constant-current circuit 12 possibly burn because of change in voltage surpasses its withstand voltage.
In sum, how making constant-current circuit and related application can bear higher voltage is the target that the present utmost point need be made great efforts.
Summary of the invention
The present invention provides a kind of decide current device, chip package and light fixture thereof; It is a plurality of constant-current circuits of serial connection; And the constant-current circuit that a Zener diode and the upper reaches are set is connected in parallel; So that cross-over connection voltage is when surpassing the breakdown voltage of Zener diode, electric current can flow to the constant-current circuit in downstream and limit the maximum of electric current via Zener diode.Share the consumed power of larger proportion by Zener diode, make of the present invention decide current device, chip package with and light fixture can bear higher voltage, and then promote security of products and reliability.
The current device of deciding of one embodiment of the invention comprises one first constant-current circuit and one second constant-current circuit.First constant-current circuit comprises one first and decides a current element and a Zener diode, and wherein, first decides the maximum of current element in order to an electric current of restricted passage one load; Zener diode and first is decided the current element reverse parallel connection.Second constant-current circuit comprises one second and decides current element, its be connected in the same way first decide current element the downstream, in order to the maximum of the electric current of restricted passage load.
The chip package of another embodiment of the present invention comprises a bearing, certain at least electric current crystal grain, a LED crystal particle and a packaging body.Bearing comprises a plurality of interior conductive junction points and a plurality of outer conductive junction point.Decide electric current crystal grain and be arranged at bearing, and electrically connect with interior conductive junction point.Decide electric current crystal grain and comprise one first constant-current circuit and one second constant-current circuit.First constant-current circuit comprises in order to limit peaked 1 first of an electric current decides a current element and a Zener diode, itself and first decide the current element reverse parallel connection.Second constant-current circuit comprises one second and decides current element, its be connected in the same way first decide current element the downstream, in order to the restriction electric current maximum.LED crystal particle is connected in series with first constant-current circuit and second constant-current circuit.Packaging body coats is decided electric current crystal grain, LED crystal particle and interior conductive junction point.
The light fixture of further embodiment of this invention comprises a light-emitting component, a drive unit and a lamp socket.Drive unit is in order to driven light-emitting element, and comprises certain current device.Decide current device and comprise one first constant-current circuit and one second constant-current circuit.First constant-current circuit comprises one first and decides a current element and a Zener diode, and wherein, first decides current element is connected in series with light-emitting component, in order to the maximum of an electric current of restricted passage light-emitting component; Zener diode and first is decided the current element reverse parallel connection.Second constant-current circuit comprises one second and decides current element, its be connected in the same way first decide current element the downstream, in order to the maximum of the electric current of restricted passage light-emitting component.Lamp socket and drive unit electrically connect, in order to electrically connect with a power supply.
Below cooperate appended graphic explanation in detail by specific embodiment, when the effect that is easier to understand the object of the invention, technology contents, characteristics and is reached.
Description of drawings
Fig. 1 is a sketch map, shows existing light-emitting diode framework with dc powered.
Fig. 2 a is a sketch map, shows the current device of deciding of one embodiment of the invention.
Fig. 2 b is a sketch map, shows the current device of deciding of another embodiment of the present invention.
Fig. 2 c is a sketch map, shows the current element of deciding of one embodiment of the invention.
Fig. 3 a to Fig. 3 c is a sketch map, and what show one embodiment of the invention decides the application examples of current device with AC power driven for emitting lights diode.
Fig. 4 is a profile, shows the chip package of one embodiment of the invention.
Fig. 5 is a sketch map, shows the light fixture of one embodiment of the invention.
Fig. 6 is a sketch map, shows the circuit of the light fixture of one embodiment of the invention.
Drawing reference numeral:
11 rectification circuits
12 constant-current circuits
13 light-emitting diodes
2,2a, 2b decide current device
21 first constant-current circuits
211 first decide current element
212 Zener diodes
22 second constant-current circuits
30 loads
30a～30e light-emitting diode
4 chip packages
41 bearings
Conductive junction point in 411
412 outer conductive junction points
42 decide electric current crystal grain
43 LED crystal particles
44 packaging bodies
50 light fixtures
51 light-emitting components
52 drive units
53 lamp sockets
AC1, AC2 AC power
The C electric capacity of voltage regulation
The CL control circuit
The D parasitic diode
The M metal-oxide half field effect transistor
The R discharge resistance
V1, V2 node
VA, VB node
Embodiment
Please with reference to Fig. 2 a, the current device 2 of deciding of one embodiment of the invention comprises one first constant-current circuit 21 and one second constant-current circuit 22.First constant-current circuit 21 comprises one first and decides a current element 211 and a Zener diode (zener diode) 212.First decides the maximum of current element 211 in order to an electric current of restricted passage one load 30.For example, load 30 can be the light-emitting diode of a plurality of serial connections.212 of Zener diodes are decided current element 211 reverse parallel connections with first.Second constant-current circuit 22 comprises one second and decides current element, its be connected in the same way first decide current element 211 the downstream.But second decides the also maximum of the electric current of restricted passage load 30 of current element.
In an embodiment, the breakdown voltage of Zener diode 212 (breakdown voltage) less than first decide current element 211 maximum withstand voltage (maximum operation voltage).According to the framework shown in Fig. 2 a; When cross-over connection in the voltage of node V1 and node V2 be slightly larger than first of first constant-current circuit 21 decide current element 211, second constant-current circuit 22 decide the starting resistor summation of current element and load 30 time, electric current is flowed through from node V1 and first is decided to flow to node V2 after current element 211, second constant-current circuit 22 and the load 30.By first decide current element 211 metering function, make that the maximum through electric current is limited in a set point, therefore, can be controlled through the electric current in whole loop, the light-emitting diode of load 30 thereby be protected.When the voltage of cross-over connection in node V1 and node V2 continues to increase, surpass the voltage segment of starting resistor summation this moment and mainly decide on the current element 211 across first.
When cross-over connection in first decide current element 211 voltage during greater than the breakdown voltage of Zener diode 212, the electric current predominating path then is after node V1 flows through Zener diode 212, second constant-current circuit 22 and load 30, to flow to node V2.At this moment,, make that the maximum through electric current still is limited in a set point by the metering function of second constant-current circuit 22, therefore, still can be controlled through the electric current in whole loop, the light-emitting diode of load 30 thereby be protected.In brief, when high voltage, Zener diode 212 has been shared the consumed power of larger proportion, and protection is lived first and decided current element 211 and can not surpass its maximum withstand voltage.In addition; Because Zener diode 212 has been shared bigger cross-pressure; The voltage ratio that exceeds just can put on second constant-current circuit 22, so the ability to bear to change in voltage of integrated circuit can significantly increase, and then promotes the fail safe and the reliability of integral product.In an embodiment, in the upstream side of first constant-current circuit 21 serial connection one or more in the same way first constant-current circuit 21 can significantly improve maximum withstand voltage of deciding current device 2 of the present invention.
Please with reference to Fig. 2 b, in an embodiment, load 30 is serially connected with between first constant-current circuit 21 and second constant-current circuit 22 also can obtain same effect.For example, when cross-over connection in the voltage of first constant-current circuit 21 during less than the breakdown voltage of Zener diode 212, first decides current element 211 performance metering functions, making can be controlled through the electric current in whole loop.And during greater than the breakdown voltage of Zener diode 212, be positioned at second constant-current circuit, the 22 performance metering functions in load 30 downstreams in the voltage of first constant-current circuit 21 when cross-over connection, making still can be controlled through the electric current in whole loop.
In an embodiment, of the present inventionly to decide current device 2 and can comprise a rectification circuit (as shown in Figure 1), it is in order to convert alternating current into direct current, so that the electric current of single direction to be provided.For example, rectification circuit can be a bridge rectifier.The preferably of the present inventionly decides current device 2 and more comprises a voltage stabilizing circuit, and it is in order to stablize the output voltage of rectification circuit, to avoid producing the intermittently luminous problem of light-emitting diode.For example, voltage stabilizing circuit comprises an electric capacity of voltage regulation and a discharge resistance.
Please with reference to Fig. 2 c; In an embodiment; First decides second of the current element 211 and second constant-current circuit 22 decides current element and can comprise a metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor; MOSFET) M and a control circuit CL, wherein control circuit CL control metal-oxide half field effect transistor M conducting or disconnection.The parasitic diode D of metal-oxide half field effect transistor M is connected in parallel in source electrode and the drain electrode of metal-oxide half field effect transistor M.According to this structure; When the voltage of node VA during greater than the voltage of node VB, control circuit CL control metal-oxide half field effect transistor M conducting, and parasitic diode D is in reverse bias; It can be considered and opens circuit, so electric current flows to node VB via metal-oxide half field effect transistor M.Because the element characteristic of metal-oxide half field effect transistor M, the maximum through electric current can be restricted.
When the voltage of node VB during greater than the voltage of node VA, parasitic diode D is in forward bias voltage drop, and electric current can pass through in a large number, so electric current can flow to node VA via parasitic diode D.This characteristic can be applicable to exchange electrically driven (operated) light-emitting diode (LED) module.For example, please with reference to Fig. 3 a, the load that light-emitting diode 30a, the 30b of a plurality of reverse parallel connections formed, its both sides are connected in series one respectively and reverse decide current device 2a and 2b.When the first link AC1 of alternating current is in positive polarity; Electric current is flowed through from the first link AC1 of alternating current and decided first of current device 2a and decide second of the current element 211 and second constant-current circuit 22 and decide current element, light-emitting diode 30a, decide the parasitic diode and first that second of current device 2b decides current element and decide the parasitic diode of current element 211 or the second link AC2 of Zener diode 212 to alternating current, and is luminous with the light-emitting diode 30a that drives in the same way.At this moment, deciding first of current device 2a decides second of the current element 211 and second constant-current circuit 22 and decides current element performance metering function.
Opposite; When the first link AC1 of alternating current is in negative polarity; Electric current is flowed through from the second link AC2 of alternating current and decided first of current device 2b and decide second of the current element 211 and second constant-current circuit 22 and decide current element, light-emitting diode 30b, decide the parasitic diode and first that second of current device 2a decides current element and decide the parasitic diode of current element 211 or the first link AC1 of Zener diode 212 to alternating current, and is luminous with the light-emitting diode 30b that drives in the same way.At this moment, deciding first of current device 2b decides second of the current element 211 and second constant-current circuit 22 and decides current element performance metering function.According to the framework shown in Fig. 3 a, light- emitting diode 30a, 30b can directly drive with AC power.
In an embodiment, first decides second of the current element 211 and second constant-current circuit 22 decides current element and also can be the current limliting diode, the semiconductor element that for example utilizes manufacture of semiconductor to produce, and obtain the same effect of current limliting.
Please with reference to Fig. 4, the chip package 4 of one embodiment of the invention comprises a bearing 41, certain at least electric current crystal grain 42, a LED crystal particle 43 and a packaging body 44.Bearing 41 has a plurality of interior conductive junction points 411 and a plurality of outer conductive junction point 412.For example, bearing 41 can be a lead frame, base plate for packaging, base of ceramic or metal substrate etc.Decide electric current crystal grain 42 and be arranged at bearing 41, and electrically connect with the interior conductive junction point of bearing 41 411, make decide electric current crystal grain 42 can be via corresponding outer conductive junction point 412 and outside electric connection.Decide electric current crystal grain 42 and can comprise the aforesaid current device of deciding, with the maximum of the electric current of restricted passage load.The person of noting decides the element in the current device, and for example first constant-current circuit, second constant-current circuit and Zener diode can be made in single crystal grain or a plurality of crystal grain.LED crystal particle 43 is connected in series with first constant-current circuit 21 and second constant-current circuit 22.44 of packaging bodies coat decides the interior conductive junction point 411 of electric current crystal grain 42, LED crystal particle 43 and bearing 41.The person of noting decides electric current crystal grain 42 and LED crystal particle 43 can be arranged at single substrate, perhaps is arranged at a plurality of substrates neither disengaging spirit of the present invention that is electrically connected to each other again respectively.
In an embodiment, LED crystal particle 43 comprises a plurality of light-emitting diode 30a～30d, and it is bridge-type and connects, and shown in Fig. 3 b, and can directly drive with AC power.For example; When the first link AC1 of alternating current is in positive polarity; Electric current is in regular turn through light-emitting diode 30a, first constant-current circuit 21, second constant-current circuit 22 and the light-emitting diode 30d second link AC2 to alternating current; Luminous with driven for emitting lights diode 30a, 30d, and by first constant-current circuit 21 or second constant-current circuit, 22 restriction maximum currents, with protection light-emitting diode 30a, 30d.When the first link AC1 of alternating current was in negative polarity, electric current was in regular turn through light-emitting diode 30b, first constant-current circuit 21, second constant-current circuit 22 and light-emitting diode 30c, and is luminous with driven for emitting lights diode 30b, 30c.At this moment, first constant-current circuit 21 or second constant-current circuit 22 still can be brought into play metering function with protection light-emitting diode 30b, 30c.The preferably, please with reference to Fig. 3 c, in the upstream extremity of deciding current device 2 and downstream at least wherein one can be connected in series light-emitting diode 30e again, to promote whole luminous efficiency.Via suitable circuit design, LED crystal particle 43 can be serially connected with between first constant-current circuit and second constant-current circuit or the downstream of second constant-current circuit.Specify as previously mentioned, repeat no more at this.The person of noting can comprise the light-emitting diode that a light-emitting diode or a plurality of serial connection or bridge-type connect in the single LED crystal particle.
Please with reference to Fig. 5, the light fixture 50 of one embodiment of the invention comprises a light-emitting component 51, a drive unit 52 and a lamp socket 53.Light-emitting component 51 can be the light-emitting diode that at least one light-emitting diode or a plurality of reverse parallel connection or bridge-type connect.Drive unit 52 is in order to driven light-emitting element 51, and comprises certain current device.The detailed description of deciding current device is repeated no more at this as aforementioned said.Lamp socket 53 electrically connects with drive unit 52, in order to electrically connect with a power supply.The person of noting, the pattern of lamp socket 53 can change according to the type of light fixture.For example, lamp socket 53 can be a plug, spiral joint or stitch joint etc.
In an embodiment, light fixture 50 of the present invention can be realized with the embodiment shown in Fig. 3 a to Fig. 3 c, and the light-emitting diode in the light fixture 50 is directly driven with AC power.Perhaps, please with reference to Fig. 6, drive unit 52 more comprises rectification circuit 11, electric capacity of voltage regulation C and discharge resistance R etc., AC power is converted into the light-emitting diode 13 of a plurality of serial connections of DC power supply rear drive.
Comprehensively above-mentioned; Of the present inventionly decide in current device, chip package and the light fixture thereof the plural constant-current circuit of serial connection; And be provided with and receive the constant-current circuit at the diode and the upper reaches at least simultaneously and be connected in parallel; So that voltage is when surpassing the breakdown voltage of Zener diode, electric current can flow to the constant-current circuit in downstream via Zener diode, with the maximum of restriction electric current.Share the consumed power of larger proportion by Zener diode, make of the present invention decide current device, chip package with and light fixture can bear higher voltage, and then promote security of products and reliability.
Above-described embodiment only is for technological thought of the present invention and characteristics are described; Its purpose is to make those skilled in the art of the present technique can understand content of the present invention and implements according to this; When can not with qualification claim of the present invention; The equalization of promptly doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim of the present invention.
Claims (21)
1. decide current device for one kind, it is characterized in that, describedly decide current device and comprise:
One first constant-current circuit comprises:
One first decides current element, in order to the maximum of an electric current of restricted passage one load; And
One Zener diode and said first is decided the current element reverse parallel connection; And
One second constant-current circuit comprises one second and decides current element, be connected in the same way said first decide current element the downstream, in order to the maximum of the said electric current of the said load of restricted passage.
2. as claimed in claim 1ly decide current device, it is characterized in that, the breakdown voltage of said Zener diode less than said first decide current element maximum withstand voltage.
3. as claimed in claim 1ly decide current device, it is characterized in that said first decides current element comprises a metal-oxide half field effect transistor and a control circuit, wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
4. as claimed in claim 1ly decide current device, it is characterized in that said second decides current element comprises a metal-oxide half field effect transistor and a control circuit, wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
5. as claimed in claim 1ly decide current device, it is characterized in that, describedly decide current device and more comprise:
One rectification circuit is in order to provide said electric current.
6. as claimed in claim 5ly decide current device, it is characterized in that, describedly decide current device and more comprise:
One voltage stabilizing circuit, it is in order to stablize an output voltage of said rectification circuit.
7. as claimed in claim 1ly decide current device, it is characterized in that, describedly decide current device and comprise a plurality of said first constant-current circuits of serial connection in the same way.
8. as claimed in claim 1ly decide current device, it is characterized in that said load strings is connected between said first constant-current circuit and said second constant-current circuit or the downstream of said second constant-current circuit.
9. a chip package is characterized in that, described chip package comprises:
One bearing, it comprises a plurality of interior conductive junction points and a plurality of outer conductive junction point;
At least certain electric current crystal grain, it is arranged at said bearing, and with said in conductive junction point electrically connect, saidly decide electric current crystal grain and comprise:
One first constant-current circuit, it comprises in order to limit peaked 1 first of an electric current decides a current element and a Zener diode, itself and said first decide the current element reverse parallel connection; And
One second constant-current circuit, it comprises one second and decides current element, its be connected in the same way said first decide current element the downstream, in order to limit the maximum of said electric current;
One LED crystal particle is connected in series with said first constant-current circuit and said second constant-current circuit; And
One packaging body coats said decide electric current crystal grain, said LED crystal particle and said interior conductive junction point.
10. chip package as claimed in claim 9 is characterized in that, the breakdown voltage of said Zener diode less than said first decide current element maximum withstand voltage.
11. chip package as claimed in claim 9 is characterized in that, said first decides current element comprises a metal-oxide half field effect transistor and a control circuit, and wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
12. chip package as claimed in claim 9 is characterized in that, said second decides current element comprises a metal-oxide half field effect transistor and a control circuit, and wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
13. chip package as claimed in claim 9 is characterized in that, said decide electric current crystal grain comprise a plurality of in the same way the serial connection said first constant-current circuits.
14. a light fixture is characterized in that, described light fixture comprises:
One light-emitting component;
One drive unit, it is in order to drive said light-emitting component, and said drive unit comprises certain current device, describedly decides current device and comprises:
One first constant-current circuit, it comprises one first and decides a current element and a Zener diode, and wherein, said first decides current element is connected in series with said light-emitting component, in order to the maximum of an electric current of the said light-emitting component of restricted passage; Said Zener diode and said first is decided the current element reverse parallel connection; And
One second constant-current circuit comprises one second and decides current element, its be connected in the same way said first decide current element the downstream, in order to the maximum of the said electric current of the said light-emitting component of restricted passage; And
One lamp socket electrically connects with said drive unit, in order to electrically connect with a power supply.
15. light fixture as claimed in claim 14 is characterized in that, the breakdown voltage of said Zener diode less than said first decide current element maximum withstand voltage.
16. light fixture as claimed in claim 14 is characterized in that, said first decides current element comprises a metal-oxide half field effect transistor and a control circuit, and wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
17. light fixture as claimed in claim 14 is characterized in that, said second decides current element comprises a metal-oxide half field effect transistor and a control circuit, and wherein said control circuit is controlled said metal-oxide half field effect transistor conducting or disconnection.
18. light fixture as claimed in claim 14 is characterized in that, said drive unit more comprises:
One rectification circuit, it is in order to provide said electric current.
19. light fixture as claimed in claim 18 is characterized in that, said drive unit more comprises:
One voltage stabilizing circuit, it is in order to stablize an output voltage of said rectification circuit.
20. light fixture as claimed in claim 14 is characterized in that, said decide current device comprise a plurality of in the same way the serial connection said first constant-current circuits.
21. light fixture as claimed in claim 14 is characterized in that, said light-emitting component comprises the light-emitting diode that at least one light-emitting diode or a plurality of reverse parallel connection or bridge-type connect.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99144177A TW201227208A (en) | 2010-12-16 | 2010-12-16 | Constant-current device, chip package and lamp thereof |
| TW099144177 | 2010-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102548116A true CN102548116A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100605301A Pending CN102548116A (en) | 2010-12-16 | 2011-03-14 | Constant current device, chip packaging piece and lamp thereof |
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|---|---|
| CN (1) | CN102548116A (en) |
| TW (1) | TW201227208A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI678944B (en) * | 2015-10-23 | 2019-12-01 | 晶元光電股份有限公司 | Led driver and illumination system related to the same |
| USRE48798E1 (en) | 2015-03-02 | 2021-10-26 | Epistar Corporation | LED driver and illumination system related to the same |
| TWI663893B (en) * | 2015-03-02 | 2019-06-21 | 晶元光電股份有限公司 | Led driver and illumination system related to the same |
| TWI678946B (en) * | 2015-03-26 | 2019-12-01 | 晶元光電股份有限公司 | Led driver and illumination system related to the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479422U (en) * | 2009-08-07 | 2010-05-19 | 数能科技股份有限公司 | Light emitting diode constant current driving element structure |
| CN201561397U (en) * | 2009-12-10 | 2010-08-25 | 陈盈佳 | LED lamp line device |
| CN201657388U (en) * | 2010-01-08 | 2010-11-24 | 陈盈佳 | Constant-current chip packaging body and luminous diode lamp driven by alternating current |
-
2010
- 2010-12-16 TW TW99144177A patent/TW201227208A/en unknown
-
2011
- 2011-03-14 CN CN2011100605301A patent/CN102548116A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479422U (en) * | 2009-08-07 | 2010-05-19 | 数能科技股份有限公司 | Light emitting diode constant current driving element structure |
| CN201561397U (en) * | 2009-12-10 | 2010-08-25 | 陈盈佳 | LED lamp line device |
| CN201657388U (en) * | 2010-01-08 | 2010-11-24 | 陈盈佳 | Constant-current chip packaging body and luminous diode lamp driven by alternating current |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201227208A (en) | 2012-07-01 |
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Application publication date: 20120704 |