CN201708991U - Single-chip bipolar constant current device for alternating current light-emitting diodes - Google Patents
Single-chip bipolar constant current device for alternating current light-emitting diodes Download PDFInfo
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- CN201708991U CN201708991U CN2010201944224U CN201020194422U CN201708991U CN 201708991 U CN201708991 U CN 201708991U CN 2010201944224 U CN2010201944224 U CN 2010201944224U CN 201020194422 U CN201020194422 U CN 201020194422U CN 201708991 U CN201708991 U CN 201708991U
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Abstract
The utility model provides a single-chip bipolar constant current device for alternating current light-emitting diodes, which comprises a first constant current circuit, a first rectifier circuit, a second constant current circuit and a second rectifier circuit. The device can generate bipolar constant current according to polarity of alternating current, and integrates the circuits into a constant current chip so as to greatly reduce volume of a package unit.
Description
Technical field
The relevant a kind of current device of deciding of the utility model, particularly relevant a kind of single-chip bipolarity that is used for alternating-current light emitting diode is decided current device.
Background technology
Light-emitting diode has that volume is little, the life-span is long and characteristic such as power saving, for having the green energy product of potentiality, in the general prior art, one AC power must be earlier is that DC power supply is again by light-emitting diode and luminous by a bridge rectifier rectification, yet realize that the required element of this circuit mode is more, make manufacturing cost higher, bulky, on considering, commerce do not have a competitive advantage.And at present industry to develop the alternating-current light emitting diode (ACLED) that can be used for civil power be to utilize resistance and alternating-current light emitting diode to be connected in series the size of controlling and driving electric current, but there are some shortcomings in this mode, in power supply process, often there is the high pressure surging may burn light-emitting diode as (1) owing to civil power, (2) if the unstable light source scintillation of easily finding of power supply, (3) alternating-current light emitting diode must bear large-scale electric current in conduction period and changes, wayward and life-span of lowering alternating-current light emitting diode of tone.
The utility model content
The purpose of this utility model provides a kind of single-chip bipolarity that is used for alternating-current light emitting diode and decides current device, can produce the ambipolar electric current of deciding according to the polarity of alternating current.
A kind of single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model is decided current device, comprises: a bearing, certain electric current chip and a packaging body.Wherein, bearing has a plurality of interior conductive junction points and a plurality of outer conductive junction point; Decide the electric current chip, it is arranged at seat surface, and electrically connect with interior conductive junction point, deciding the electric current chip comprises: one first constant-current circuit, one first rectification circuit, one second constant-current circuit and one second rectification circuit, wherein, first constant-current circuit is in order to one first electric current of positive half period that an alternating current is provided, first rectification circuit is in parallel with first constant-current circuit, first rectification circuit at the positive half period of alternating current for opening circuit, and allow one second electric current of the negative half-cycle of alternating current to pass through, second constant-current circuit is in order to second electric current of negative half-cycle that alternating current is provided, and second constant-current circuit is connected with first constant-current circuit; Second rectification circuit is in parallel with second constant-current circuit, and second rectification circuit for opening circuit, and allows first electric current of the positive half period of alternating current to pass through at the negative half-cycle of alternating current; Conductive junction point and decide the electric current chip in the packaging body coats.
Useful technique effect of the present utility model is: the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model is decided current device can produce the ambipolar electric current of deciding according to the polarity of alternating current, first constant-current circuit, first rectification circuit, second constant-current circuit and second rectification circuit are arranged in certain electric current chip, can significantly reduce the volume of packaging part, on commerce is used, have more competitive advantage.
Description of drawings
Below describe the utility model in detail by the specific embodiment conjunction with figs., so that the effect that is easier to understand the purpose of this utility model, technology contents, characteristics and is reached, wherein:
Fig. 1 decides the schematic diagram of current device for using the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model.
Fig. 2 decides the structural representation of current device for the single-chip bipolarity that is used for alternating-current light emitting diode of the utility model one embodiment.
Fig. 3 decides the schematic diagram of deciding the electric current chip of current device for the single-chip bipolarity that is used for alternating-current light emitting diode of the utility model one embodiment.
Fig. 4 is a polarity chron for alternating current, the operation chart that the single-chip bipolarity that is used for alternating-current light emitting diode of the utility model one embodiment is decided current device.
Fig. 5 is another polarity chron for alternating current, the operation chart that the single-chip bipolarity that is used for alternating-current light emitting diode of the utility model one embodiment is decided current device.
Fig. 6 decides the schematic diagram of another embodiment that decides the electric current chip of current device for the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model.
Embodiment
Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 1 decides the schematic diagram of current device 1 for using the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model; Fig. 2 decides the structural representation of current device 1 for the single-chip bipolarity that is used for alternating-current light emitting diode of an embodiment of the present utility model; Fig. 3 decides the schematic diagram of deciding electric current chip 50 of current device 1 for the single-chip bipolarity that is used for alternating-current light emitting diode of embodiment of the present utility model.The one alternating current AC serial connection single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model is decided current device 1, and the single-chip bipolarity that is used for alternating-current light emitting diode is decided the L shaped one-tenth of current device 1 serial connection one load one loop, wherein load L can be an alternating-current light emitting diode (AC LED), and the single-chip bipolarity that is used for alternating-current light emitting diode is decided current device 1 can produce the ambipolar electric current of deciding according to the polarity of alternating current AC.
The single-chip bipolarity that is used for alternating-current light emitting diode is decided current device 1 and is comprised: a bearing 10, certain electric current chip 50 and a packaging body 40.Wherein, bearing 10 has a plurality of interior conductive junction point A, C and a plurality of outer conductive junction point A ', B ', and when using, outer conductive junction point A ', the B ' of bearing 10 connect alternating current AC respectively in load L, as shown in Figure 1.Outer conductive junction point A ', B ' can be soldered ball, but not as limit.Decide electric current chip 50 and be arranged at bearing 10 surfaces, and electrically connect with interior conductive junction point A, C.Deciding electric current chip 50 comprises: one first constant-current circuit 201, one first rectification circuit 202, one second constant-current circuit 301 and one second rectification circuit 302, wherein, first constant-current circuit 201 is in order to one first electric current I of positive half period that alternating current AC is provided
1First rectification circuit 202 is in parallel with first constant-current circuit 201, and first rectification circuit 202 for opening circuit, and allows one second electric current I of the negative half-cycle of alternating current AC at the positive half period of alternating current AC
2By.Second constant-current circuit 301 is in order to second electric current I of negative half-cycle that alternating current AC is provided
2, second rectification circuit 302 is in parallel with second constant-current circuit 301, and second rectification circuit 302 for opening circuit, and allows first electric current of the positive half period of alternating current AC to pass through I at the negative half-cycle of alternating current AC
1Packaging body 40 coats interior conductive junction point A, C and decides electric current chip 50.
In an embodiment, as shown in Figure 3, first rectification circuit 202 and second rectification circuit 302 can be a diode and respectively with first constant-current circuit 201 and second constant-current circuit, 301 reverse parallel connections.For instance, as shown in Figure 4, as alternating current AC that the external world provided during in positive half period, the outer conductive junction point A ' of bearing 10 is that the outer conductive junction point B ' of high-pressure side, bearing 10 is a low-pressure end, and first constant-current circuit 201 is exported first electric current I because of forward bias voltage drop
1Be alternating current AC when positive half period first constant-current circuit 201 because of the forward bias voltage drop conducting, first rectification circuit 202 then for reverse bias for opening circuit, and second constant-current circuit 301 is closed because of reverse bias, and second rectification circuit 302 allows first electric current I because of forward bias voltage drop
1By.
As shown in Figure 5, alternating current AC is when negative half-cycle, and the outer conductive junction point A ' of bearing 10 is that the outer conductive junction point B ' of low-pressure end, bearing 10 is a high-pressure side, and second constant-current circuit 301 is exported second electric current I because of forward bias voltage drop
2, second rectification circuit 302 then for reverse bias for opening circuit, and first constant-current circuit 201 is closed because of reverse bias, first rectification circuit 202 allows second electric current I because of forward bias voltage drop
2By.
Be understandable that decide in the electric current chip 50 that all first constant-current circuits 201 oppositely are connected in series with second constant-current circuit 301 and respectively with first rectification circuit 202 and second rectification circuit, 302 reverse parallel connection persons, be all spirit of the present utility model, be illustrated in figure 6 as another embodiment schematic diagram of deciding electric current chip 50 that the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model is decided current device.As alternating current AC that the external world provided during in positive half period, the outer conductive junction point A ' of bearing 10 is that the outer conductive junction point B ' of high-pressure side, bearing 10 is a low-pressure end, second rectification circuit 302 is because of the forward bias voltage drop conducting, second constant-current circuit 301 is closed because of reverse bias, and first constant-current circuit 201 is exported first electric current I because of forward bias voltage drop
1, first rectification circuit 202 then for reverse bias for opening circuit, therefore second rectification circuit 302 allows first electric current I
1By.Alternating current AC is when negative half-cycle, and the outer conductive junction point A ' of bearing 10 is that the outer conductive junction point B ' of low-pressure end, bearing 10 is a high-pressure side, second rectification circuit 302 because of reverse bias for opening circuit, second constant-current circuit 301 is exported second electric current I because of forward bias voltage drop
2, first constant-current circuit 201 is closed because of reverse bias output, and first rectification circuit 202 then is the forward bias voltage drop conducting, and promptly first rectification circuit 202 allows second electric current I
2By.
Be noted that, bearing 10 can be a lead frame or a base plate for packaging, and will decide electric current chip 50 and be arranged on the bearing 10, first constant-current circuit 201 and/or second constant-current circuit 301 can be a current mirroring circuit, for instance, can be a Wilson current mirror (Wilson current mirror).In addition, first rectification circuit 202 can be a parasitic diode of first constant-current circuit 201; Same, second rectification circuit 302 can be a parasitic diode of second constant-current circuit 301.Decide the circuit arrangement that electric current chip 50 will utilize semiconductor technology to finish first constant-current circuit 201, first rectification circuit 202, second constant-current circuit 301 and second rectification circuit 302 and be made on the one chip, can significantly dwindle chip volume.
Comprehensively above-mentioned, the single-chip bipolarity that is used for alternating-current light emitting diode of the present utility model is decided current device can produce the ambipolar electric current of deciding according to the polarity of alternating current, first constant-current circuit, first rectification circuit, second constant-current circuit and second rectification circuit are arranged in certain electric current chip, significantly reduce the volume of packaging part, on commerce is used, have more competitive advantage.
Above-described embodiment only is for technological thought of the present utility model and characteristics are described, its purpose makes the personage who is familiar with this technology can understand content of the present utility model and is implementing according to this, limit claim of the present utility model when not being confined to these embodiment, be that every equalization of doing according to the spirit that the utility model disclosed changes or modification, must be encompassed in the claim of the present utility model.
Claims (6)
1. a single-chip bipolarity that is used for alternating-current light emitting diode is decided current device, it is characterized in that, comprises:
One bearing, it has a plurality of interior conductive junction points and a plurality of outer conductive junction point;
Certain electric current chip, it is arranged at this seat surface, and with this in conductive junction point electrically connect, this is decided the electric current chip and comprises:
One first constant-current circuit, it is in order to one first electric current of positive half period that an alternating current is provided;
One first rectification circuit, it is in parallel with this first constant-current circuit, and this first rectification circuit for opening circuit, and allows one second electric current of the negative half-cycle of this alternating current to pass through at the positive half period of this alternating current;
One second constant-current circuit, it is in order to this second electric current of negative half-cycle that this alternating current is provided, and this second constant-current circuit is connected with this first constant-current circuit; And
One second rectification circuit, it is in parallel with this second constant-current circuit, and this second rectification circuit for opening circuit, and allows this first electric current of the positive half period of this alternating current to pass through at the negative half-cycle of this alternating current; And
One packaging body, it coats and is somebody's turn to do interior conductive junction point and should decides the electric current chip.
2. the single-chip bipolarity that is used for alternating-current light emitting diode according to claim 1 is decided current device, it is characterized in that, this first constant-current circuit comprises a current mirroring circuit.
3. the single-chip bipolarity that is used for alternating-current light emitting diode according to claim 1 is decided current device, it is characterized in that, this second constant-current circuit comprises a current mirroring circuit.
4. the single-chip bipolarity that is used for alternating-current light emitting diode according to claim 1 is decided current device, it is characterized in that, this first rectification circuit is a parasitic diode of this first constant-current circuit.
5. the single-chip bipolarity that is used for alternating-current light emitting diode according to claim 1 is decided current device, it is characterized in that, this second rectification circuit is a parasitic diode of this second constant-current circuit.
6. the single-chip bipolarity that is used for alternating-current light emitting diode according to claim 1 is decided current device, it is characterized in that this bearing comprises lead frame or base plate for packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201944224U CN201708991U (en) | 2010-05-07 | 2010-05-07 | Single-chip bipolar constant current device for alternating current light-emitting diodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201944224U CN201708991U (en) | 2010-05-07 | 2010-05-07 | Single-chip bipolar constant current device for alternating current light-emitting diodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201708991U true CN201708991U (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201944224U Expired - Fee Related CN201708991U (en) | 2010-05-07 | 2010-05-07 | Single-chip bipolar constant current device for alternating current light-emitting diodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201708991U (en) |
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2010
- 2010-05-07 CN CN2010201944224U patent/CN201708991U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20180507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |