CN202026500U - Dimmable LED (light-emitting diode) power drive device and light source device - Google Patents
Dimmable LED (light-emitting diode) power drive device and light source device Download PDFInfo
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- CN202026500U CN202026500U CN2011200343003U CN201120034300U CN202026500U CN 202026500 U CN202026500 U CN 202026500U CN 2011200343003 U CN2011200343003 U CN 2011200343003U CN 201120034300 U CN201120034300 U CN 201120034300U CN 202026500 U CN202026500 U CN 202026500U
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- Prior art keywords
- circuit
- decision circuitry
- dimmable led
- drive circuit
- driving device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model offers a dimmable LED (light-emitting diode) power drive device and a light source device, wherein the dimmable LED power drive device comprises a mistaken-triggering-preventing circuit and a clock circuit which are respectively connected with a logic circuit, wherein the logic circuit receives signals from a power judging circuit through a function judging circuit and sends the processed signals to a drive circuit through a pulse width modulating circuit. With the adoption of the utility model, the functions of LED drive, dimming, flash explosion and SOS can be realized in smaller space, the structure is simple, the power consumption is low, and the service life of an LED lamp is prolonged.
Description
Technical field
The utility model relates to drive circuit, relates in particular to led drive circuit, particularly a kind of Dimmable LED drive circuit.
Background technology
The Dimmable LED drive integrated circult all needs an independent power drives integrated circuit or external discrete device and a light adjusting controller integrated circuit to realize at present, the whole system periphery needs the more discrete devices such as diode, electric capacity and resistance of configuration, it is very big to take the PCB space, and system cost is very high.On the other hand, as portable mini products such as flashlights, the space is narrow and small, causes and leans on very closely between the device, is unfavorable for distributing of heat, causes chip and product to damage easily, and device is various in addition, and is all influential to production cycle and yield.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the drive circuit that a kind of volume is little, device is few is provided, and to reduce cost, to prolong the LED lamp life-span, improves the product yield.
For achieving the above object, the utility model at first provides a kind of Dimmable LED power driving device, it comprises: the anti-error circuits for triggering and the clock circuit that are connected with logical circuit respectively, described logical circuit passes through the signal of function decision circuitry reception from the power supply decision circuitry, and will send to drive circuit by pulse-width modulation circuit after this signal processing.
In the utility model one preferred embodiment, described drive circuit can adopt low threshold value cmos circuit.
In another preferred embodiment of the utility model, at least one in described drive circuit can further comprise respectively with described logical circuit is connected undervoltage detection circuit, temperature protection circuit and the electrostatic discharge protective circuit.
The utility model provides a kind of light supply apparatus in addition, it comprises: the Dimmable LED power driving device, it comprises, the anti-error circuits for triggering and the clock circuit that are connected with logical circuit respectively, described logical circuit passes through the signal of function decision circuitry reception from the power supply decision circuitry, and will send to drive circuit by pulse-width modulation circuit after this signal processing; A key switch, an end is connected with described power supply decision circuitry, and the other end is connected with power positive end; The LED lamp is connected between described key switch and the described drive circuit; And an electric capacity, an end is connected with described power supply decision circuitry, and the other end is connected with power supply negative terminal.
In the utility model one preferred embodiment, described drive circuit can adopt low threshold value cmos circuit.
In the utility model one preferred embodiment, described supply voltage scope can be 3V ~ 5.5V, and preferably, the supply voltage scope can further be 3V ~ 5V.
In the utility model one preferred embodiment, for assurance function correctly switches, the minimum value of the capacitance of described electric capacity is 200nF.
In the utility model one preferred embodiment, at least one in described Dimmable LED power driving device also comprises respectively with described logical circuit is connected undervoltage detection circuit, temperature protection circuit and the electrostatic discharge protective circuit.
The advantage of the technical scheme that the utility model adopted is:
Circuit structure of the present utility model makes light modulation and drives can be incorporate single integrated circuit (IC) design, so system only needs few peripheral components, just can realize the LED power drive of tunable optical;
The utility model drive circuit adopts low threshold value CMOS technology, and driving force is strong;
The utility model adopts a key switch to realize that power supply is with turn-offing between drive circuit and the LED lamp, by the switching between electric capacity and the IC interior decision circuitry realization function; Owing to only use single integrated circuit and an electric capacity, make the heat radiation of product fine, reach the purpose of protection entire product.
Below in conjunction with accompanying drawing enforcement of the present utility model and advantage are further explained.
Description of drawings
Accompanying drawing 1 shows according to a kind of light supply apparatus of the present utility model.
The structural representation that accompanying drawing 2 shows according to a kind of Dimmable LED power driving device of the present utility model.
Accompanying drawing 3 shows the course of work of light supply apparatus of the present utility model.
Embodiment
The explanation of relevant embodiment of the present utility model is graphic with reference to what add, can be in order to the specific embodiment of implementing in order to illustration the utility model.In following examples, in different figure, same section is to represent with same numeral.
With reference to figure 1.Comprise Dimmable LED power driving device 14, LED lamp 13, key switch 12, an electric capacity 15 and a power supply 11 according to a kind of light supply apparatus of the present utility model.
With reference to figure 2.Described Dimmable LED power driving device 14 comprises, anti-error circuits for triggering 144 that are connected with logical circuit 143 and clock circuit 145 respectively, the signal that described logical circuit 143 receives from power supply decision circuitry 141 by function decision circuitry 142, and will send to drive circuit 147 by pulse-width modulation circuit 146 after this signal processing.
With reference to figure 1 and Fig. 2.Described key switch 12 1 ends are connected with described power supply decision circuitry 141, and the other end is connected with power supply 11 anodes; LED lamp 13 is connected between described key switch 12 and the described drive circuit 147; Electric capacity 15 1 ends are connected with described power supply decision circuitry 141, and the other end is connected with power supply 11 negative terminals.
Refer again to Fig. 2.In the utility model one preferred embodiment, preferably, described drive circuit 147 can adopt low threshold value cmos circuit, this can so that the current capacity of drive circuit much larger than common CMOS technology.According to formula PLED=ILED*ULED, the electric current that we set drive circuit equals to flow through the electric current of LED, so the current capacity of drive circuit is strong, illustrates that the power of driving LED is big more; And according to the current formula of metal-oxide-semiconductor
No matter be metal-oxide-semiconductor linear zone current formula (1) or metal-oxide-semiconductor saturation region current formula (2), reduce the threshold value VTH of metal-oxide-semiconductor, the electric current of metal-oxide-semiconductor all increases.
Continuation is with reference to figure 2.In order to guarantee the safety of LED lamp 13, the voltage of power supply 141 can not be higher than 5.5V, and promptly the voltage range of power supply 141 can be 3V ~ 5.5V, and the voltage range of this power supply 141 is 3V ~ 5V usually.In the another preferred embodiment of the utility model, for assurance function correctly switches, the minimum value of the capacitance of described electric capacity 15 is 200nF, and promptly capacitance can not be less than 200nF.For guaranteeing IC reliability; in the utility model one preferred embodiment, at least one in described Dimmable LED power driving device can also further comprise respectively with described logical circuit 143 is connected undervoltage detection circuit 148, temperature protection circuit 149 and the electrostatic discharge protective circuit 140.
With reference to figure 3, simultaneously with reference to figure 1 and Fig. 2.During the utility model work, power supply decision circuitry 141 is judged the shutoff of key switch 12 among Fig. 1 among Fig. 2, provide power supply 11 upper and lower electricity signal once and judge 142 to function, come the request of processing capacity decision circuitry by logical circuit 143, by anti-error circuits for triggering 144 and the clock circuit 145 final pulse-width modulation circuits 146 of giving, give the signal of 147 1 distinct pulse widths of drive circuit by pulse-width modulation circuit 146, the LED lamp 13 that drive circuit 147 drives among Fig. 1.
With reference to figure 3.Key switch 12 is pressed for the first time, battery supply 11 enters integrated circuit 14 by switch 12, and integrated circuit 14 begins to start, and lights the LED lamp, when key switch 12 is pressed for the second time, battery supply 11 is with disconnecting between the integrated circuit 14, and at this moment integrated circuit 14 is kept system mode by charge stored on the external electric capacity 15, because circuit has carried out low power dissipation design, when entire chip was powered at 5V, the power consumption of integrated circuit 14 only was 30uA, and the system held time can be up to more than 24 hours.The switch 12 that pushes button for the third time, battery supply 11 enters integrated circuit 14 by switch 12, and integrated circuit 14 enters following a kind of state that integrated circuit sets in advance.After the state that integrated circuit 14 sets in advance was all finished, system can circulate again as accompanying drawing 3.
The application's design is: consider that power drives integrated circuit that the needs of present Dimmable LED drive integrated circult are independent or external discrete device and a light adjusting controller integrated circuit realize, system's circumferential arrangement device is more, it is very big to take the PCB space, the cost height; And to less products such as picture flashlights, device just leans on very closely, causes heat to distribute difficulty, and chip and product are bad easily; Device is various in addition, and is all influential to production cycle and yield.The utility model provides a kind of system-on-a-chip solution of built-in power device, light modulation and the incorporate single integrated circuit (IC) design of driving, and whole system only needs few peripheral components, just can realize the LED power drive of tunable optical.The utility model drive circuit adopts low threshold value CMOS technology, integrated diode and resistance, IC interior is realized LED driving, dimming function and the quick-fried sudden strain of a muscle of 8hz, SOS function through signal processing, occupies little space, simple in structure, low in energy consumption, prolongs the LED lamp life-span.
Certainly, more than only be concrete exemplary applications of the present utility model, protection range of the present utility model is not constituted any limitation.In addition to the implementation, the utility model can also have other execution mode, for example the pulse-width modulation circuit in this facility example is changed into constant-current source, is the constant-current source driving thereby drive; Another embodiment is for to place chip internal to electric capacity.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the utility model scope required for protection.
Claims (9)
1. Dimmable LED power driving device, it is characterized in that, comprise: the anti-error circuits for triggering and the clock circuit that are connected with logical circuit respectively, described logical circuit passes through the signal of function decision circuitry reception from the power supply decision circuitry, and will send to drive circuit by pulse-width modulation circuit after this signal processing.
2. Dimmable LED power driving device according to claim 1 is characterized in that, described drive circuit adopts low threshold value cmos circuit.
3. Dimmable LED power driving device according to claim 2 is characterized in that, at least one in described drive circuit further comprises respectively with described logical circuit is connected undervoltage detection circuit, temperature protection circuit and the electrostatic discharge protective circuit.
4. a light supply apparatus is characterized in that, comprising:
The Dimmable LED power driving device, it comprises, the anti-error circuits for triggering and the clock circuit that are connected with logical circuit respectively, described logical circuit pass through the signal of function decision circuitry reception from the power supply decision circuitry, and will send to drive circuit by pulse-width modulation circuit after this signal processing;
A key switch, an end is connected with described power supply decision circuitry, and the other end is connected with power positive end;
The LED lamp is connected between described key switch and the described drive circuit; And
An electric capacity, an end is connected with described power supply decision circuitry, and the other end is connected with power supply negative terminal.
5. light supply apparatus according to claim 4 is characterized in that, described drive circuit adopts low threshold value cmos circuit.
6. light supply apparatus according to claim 4 is characterized in that, described supply voltage scope is 3V ~ 5.5V.
7. light supply apparatus according to claim 6 is characterized in that, described supply voltage scope is 3V ~ 5V.
8. light supply apparatus according to claim 4 is characterized in that, the minimum value of the capacitance of described electric capacity is 200nF.
9. light supply apparatus according to claim 4 is characterized in that, at least one in described Dimmable LED power driving device also comprises respectively with described logical circuit is connected undervoltage detection circuit, temperature protection circuit and the electrostatic discharge protective circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343003U CN202026500U (en) | 2011-02-01 | 2011-02-01 | Dimmable LED (light-emitting diode) power drive device and light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343003U CN202026500U (en) | 2011-02-01 | 2011-02-01 | Dimmable LED (light-emitting diode) power drive device and light source device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202026500U true CN202026500U (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200343003U Expired - Lifetime CN202026500U (en) | 2011-02-01 | 2011-02-01 | Dimmable LED (light-emitting diode) power drive device and light source device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202026500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196629A (en) * | 2011-02-01 | 2011-09-21 | 上海矽诺微电子有限公司 | Dimmable LED power driving device and light source device |
-
2011
- 2011-02-01 CN CN2011200343003U patent/CN202026500U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196629A (en) * | 2011-02-01 | 2011-09-21 | 上海矽诺微电子有限公司 | Dimmable LED power driving device and light source device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Haimen microelectronics Co Ltd Assignor: Shanghai Mixinno Microelectronic, Inc. Contract record no.: 2017310000028 Denomination of utility model: Dimmable LED power driving device and light source device Granted publication date: 20111102 License type: Exclusive License Record date: 20170614 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |
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| CX01 | Expiry of patent term |