CN204721668U - A kind of LED control circuit and motor vehicle light source being applied to motor vehicle light source - Google Patents
A kind of LED control circuit and motor vehicle light source being applied to motor vehicle light source Download PDFInfo
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- CN204721668U CN204721668U CN201520396847.6U CN201520396847U CN204721668U CN 204721668 U CN204721668 U CN 204721668U CN 201520396847 U CN201520396847 U CN 201520396847U CN 204721668 U CN204721668 U CN 204721668U
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Abstract
The utility model relates to a kind of LED control circuit and the motor vehicle light source that are applied to motor vehicle light source, and wherein LED control circuit comprises: connect with the positive pole of light-emitting diode D1, to the current sense resistor R that the electric current of light-emitting diode D1 detects; Connect with described current sense resistor R, receive the electric current that described current sense resistor R detects, according to the PWM chip that setting current parameters and described electric current generation current feedback signal also export; Connect with the negative pole of described PWM chip and described light-emitting diode D1 respectively, receive described current feedback signal, according to the inductance L that the electric current of described current feedback signal to described light-emitting diode D1 regulates.The utility model achieves and regulates the electric current of light-emitting diode D1, achieves and controls the luminosity of light-emitting diode D1.
Description
Technical field
The utility model relates to automotive field, is specifically related to LED (Light Emitting Diode, the light-emitting diode) control circuit and the motor vehicle light source that are applied to motor vehicle light source.
Background technology
Because LED has many advantages being better than conventional light source such as little power consumption, life-span length, current most motor vehicle light source (day portable lighter, dipped headlights etc. as on automobile, motorcycle) all adopts LED to realize.
Due to the polytropy of motor vehicle driving scene, driver often needs to carry out corresponding control according to Driving Scene to the LED light source on motor vehicle, as open, close dipped headlights, day portable lighter etc.; The control of current LED mainly contains drived control and brilliance control, driving LED can being started working luminescence, by controlling the brightness of LED, LED can be made to carry out work with different lights by output driving current to LED.
Inventor of the present utility model finds in research process, and the LED light source on current motor vehicle, by after current drives luminescence, is that luminescence is carried out in the brightness set, and luminosity also cannot regulate; But to regulate the luminosity of the LED light source on motor vehicle be a kind of current demand of driver, therefore a kind of LED control circuit being applied to motor vehicle light source how is designed, to carry out regulable control to the luminosity of the LED light source on motor vehicle, become the problem that those skilled in the art need to consider.
Utility model content
In view of this, the utility model embodiment provides a kind of LED control circuit and the motor vehicle light source that are applied to motor vehicle light source, to realize carrying out regulable control to the luminosity of the LED light source on motor vehicle.
For achieving the above object, the utility model embodiment provides following technical scheme:
Be applied to a LED control circuit for motor vehicle light source, comprise:
Connect with the positive pole of light-emitting diode D1, to the current sense resistor R that the electric current of light-emitting diode D1 detects;
Connect with described current sense resistor R, receive the electric current that described current sense resistor R detects, according to the PWM chip that setting current parameters and described electric current generation current feedback signal also export;
Connect with the negative pole of described PWM chip and described light-emitting diode D1 respectively, receive described current feedback signal, according to the inductance L that the electric current of described current feedback signal to described light-emitting diode D1 regulates.
Wherein, described LED control circuit is applied to the day portable lighter of motor vehicle, and described LED control circuit also comprises:
The first power supply connected with positive pole and the described PWM chip of described light-emitting diode D1 respectively;
Reverse protection diode D2, the positive pole of described reverse protection diode D2 connects second source, and negative pole connects with the first end of described current sense resistor R, and the first end of described current sense resistor R connects with described PWM chip;
Schottky diode D3, the plus earth of described Schottky diode D3, negative pole connects with the negative pole of described reverse protection diode D2;
The first electric capacity C1 in parallel with described Schottky diode D3, one end ground connection of described first electric capacity C1, the other end connects with the negative pole of described reverse protection diode D2;
The interface that positive pole and the described PWM chip of feedback diode D4, described feedback diode D4 export described current feedback signal connects, and the interface that negative pole receives described electric current with described PWM chip connects;
Second electric capacity C2, one end of described second electric capacity C2 connects with the first end of described inductance L, other end ground connection, and the first end of described inductance L connects with described PWM chip.
Wherein, described PWM chip is T6322A chip, and described T6322A chip comprises:
Received current detects the VIN interface of the electric current that resistance R detects;
Export a LX interface of described current feedback signal;
The 2nd LX interface connected with described first power supply;
The GND interface of ground connection.
Wherein, described LED control circuit is applied to the dipped headlights of motor vehicle, and described LED control circuit also comprises:
The first power supply connected with positive pole and the described PWM chip of described light-emitting diode D1 respectively;
Reverse protection diode D2, the positive pole of described reverse protection diode D2 connects second source, and negative pole connects with the first end of described current sense resistor R, and the first end of described current sense resistor R connects with described PWM chip;
The first end of the first electric capacity C1, described first electric capacity C1 connects with the negative pole of described reverse protection diode D2, the second end ground connection;
Schottky diode D3, the plus earth of described Schottky diode D3, negative pole connects with the first end of described first electric capacity C1;
Feedback diode D4, the positive pole of described feedback diode D4 connects with the first end of described inductance L, and the interface that negative pole receives described electric current with described PWM chip connects, and the first end of described inductance L connects with described PWM chip;
Second electric capacity C2, one end of described second electric capacity C2 connects with the first end of described inductance L, other end ground connection.
Wherein, described PWM chip is T8304AD chip, and described T8304AD chip comprises:
The VIN interface connected with the first end of described current sense resistor R;
The ISENSE interface connected with second end of described current sense resistor R;
The LX interface connected with described inductance;
The 2nd LX interface connected with described inductance;
One GND interface of ground connection;
2nd GND interface of ground connection.
Wherein, described LED control circuit also comprises:
Connect with described PWM chip, input the input unit of setting current parameters for driver.
Wherein, described input unit comprises: knob, button or touch-screen.
Wherein, the minus earth of described light-emitting diode D1.
The utility model embodiment also provides a kind of motor vehicle light source, comprises the described above LED control circuit being applied to motor vehicle light source.
Wherein, described motor vehicle light source is automotive luminaire.
Based on technique scheme, the LED control circuit of what the utility model embodiment provided be applied to motor vehicle light source, comprising: connect with the positive pole of light-emitting diode D1, to the current sense resistor R that the electric current of light-emitting diode D1 detects; Connect with described current sense resistor R, receive the electric current that described current sense resistor R detects, according to the PWM chip that setting current parameters and described electric current generation current feedback signal also export; Connect with the negative pole of described PWM chip and described light-emitting diode D1 respectively, receive described current feedback signal, according to the inductance L that the electric current of described current feedback signal to described light-emitting diode D1 regulates.By PWM chip U, inductance L and current sense resistor R can form the step-down controller of self-oscillation continuous mode, thus regulate the electric current of light-emitting diode D1, realize controlling the luminosity of light-emitting diode D1.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation being applied to the LED control circuit of motor vehicle light source that Fig. 1 provides for the utility model embodiment;
Another structural representation being applied to the LED control circuit of motor vehicle light source that Fig. 2 provides for the utility model embodiment;
The structural representation being again applied to the LED control circuit of motor vehicle light source that Fig. 3 provides for utility model embodiment;
The another structural representation being applied to the LED control circuit of motor vehicle light source that Fig. 4 provides for the utility model embodiment;
Another structural representation being again applied to the LED control circuit of motor vehicle light source that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation being applied to the LED control circuit of motor vehicle light source that Fig. 1 provides for the utility model embodiment, with reference to Fig. 1, this LED control circuit can comprise: light-emitting diode D1, current sense resistor R, PWM chip U and inductance L;
Wherein, one end of current sense resistor R connects with the positive pole of light-emitting diode D1, to detect the electric current of light-emitting diode D1; The other end of current sense resistor R connects with PWM chip U, by the electric current of detected light-emitting diode D1 input PWM chip U;
PWM chip U connects with current sense resistor R and inductance L respectively, received current detects the electric current that resistance R inputs, according to the electric current generation current feedback signal that setting current parameters and current sense resistor R input, and produced current feedback signal is transported to inductance L;
Inductance L one end connects with PWM chip, receives described current feedback signal, and the other end connects with the negative pole of light-emitting diode D1, to regulate according to the electric current of described current feedback signal to described light-emitting diode D1.
Can find out, PWM chip U, inductance L and current sense resistor R can form the step-down controller of a self-oscillation continuous mode, thus regulate the electric current of light-emitting diode D1, control the luminescence of light-emitting diode D1;
Optionally, the setting current parameters in PWM chip U can be inputted according to actual needs by user; Optionally, the utility model embodiment can arrange and connect with PWM chip U, inputs the input unit (as knob, button or touch-screen etc.) of setting current parameters for driver; Driver can input setting current parameters by input device, setting current parameters in PWM chip U is adjusted, thus in PWM chip U, realize the input of setting current parameters corresponding to different brightness, and then the setting current parameters making PWM chip U corresponding according to different brightness, the electric current detected with current sense resistor R realizes the generation of current feedback signal corresponding to different brightness, and the current feedback signal making light-emitting diode D1 corresponding according to different brightness realizes light adjustment; Optionally, for ease of user's input, the parameter of the light correspondence of the light-emitting diode D1 that setting current parameters adjusts can be set on the input device, make user realize setting the input of current parameters more intuitively by input unit.
Optionally, the negative pole of light-emitting diode D1 can ground connection.
The LED control circuit of what the utility model embodiment provided be applied to motor vehicle light source, comprising: connect with the positive pole of light-emitting diode D1, to the current sense resistor R that the electric current of light-emitting diode D1 detects; Connect with described current sense resistor R, receive the electric current that described current sense resistor R detects, according to the PWM chip that setting current parameters and described electric current generation current feedback signal also export; Connect with the negative pole of described PWM chip and described light-emitting diode D1 respectively, receive described current feedback signal, according to the inductance L that the electric current of described current feedback signal to described light-emitting diode D1 regulates.By PWM chip U, inductance L and current sense resistor R can form the step-down controller of self-oscillation continuous mode, thus regulate the electric current of light-emitting diode D1, realize controlling the luminosity of light-emitting diode D1.
Optionally, the LED control circuit that the utility model embodiment provides can be applicable to the day portable lighter of motor vehicle, Fig. 2 shows another structural representation being applied to the LED control circuit of motor vehicle light source that the utility model embodiment provides, and shown in composition graphs 1 and Fig. 2, this LED control circuit can also comprise: the first power supply VCC1, second source VCC2, reverse protection diode D2, Schottky diode D3, the first electric capacity C1, feedback diode D4, the second electric capacity C2;
Wherein, the first power supply VCC1 connects with the positive pole of light-emitting diode D1 and PWM chip U respectively, thinks that light-emitting diode D1 and PWM chip U powers;
The positive pole of reverse protection diode D2 meets second source VCC2, negative pole connects with the first end of current sense resistor R, concrete, the first end of the current sense resistor R that reverse protection diode D2 connects, for current sense resistor R connects with PWM chip U, export the one end of the electric current detected to PWM chip U;
The plus earth of Schottky diode D3, negative pole connects with the negative pole of reverse protection diode D2;
One end ground connection of the first electric capacity C1, the other end connects with the negative pole of reverse protection diode D2;
The positive pole of feedback diode D4 connects with the interface of PWM chip U output current feedback signal, and the interface that negative pole detects with PWM chip U received current the electric current that resistance R detects connects;
One end of second electric capacity C2 connects with the first end of inductance L, other end ground connection; The first end of inductance L connects with PWM chip U, for receiving the one end of the current feedback signal that PWM chip U exports.
By LED control circuit shown in Fig. 2 can to motor vehicle day portable lighter light regulate.
Optionally, in LED control circuit shown in Fig. 2, PWM chip U is chosen as T6322A chip; Corresponding, Fig. 3 shows the structural representation being again applied to the LED control circuit of motor vehicle light source that the utility model embodiment provides, shown in composition graphs 2 and Fig. 3, in shown in Fig. 3, PWM chip U is specially T6322A chip U1, with reference to Fig. 3, T6322A chip U1 can comprise: VIN interface, a LX interface, the 2nd LX interface and GND interface;
Wherein, VIN interface connects with current sense resistor R, can detect the electric current that resistance R detects by received current;
One LX interface connects with inductance L, exportable described current feedback signal;
2nd LX interface connects with the first power supply VCC1;
GND interfacing ground.
Optionally, the LED control circuit that the utility model embodiment provides can be applicable to the dipped headlights of motor vehicle, Fig. 4 shows the another structural representation being applied to the LED control circuit of motor vehicle light source that the utility model embodiment provides, and shown in composition graphs 1 and Fig. 4, this LED control circuit can also comprise: the first power supply VCC1, second source VCC2, reverse protection diode D2, the first electric capacity C1, Schottky diode D3, feedback diode D4, the second electric capacity C2;
Wherein, the first power supply VCC1 connects with the positive pole of light-emitting diode D1 and PWM chip U respectively, thinks that light-emitting diode D1 and PWM chip U powers;
The positive pole of reverse protection diode D2 connects with second source VCC2, and negative pole connects with the first end of current sense resistor R; The first end of current sense resistor R connects with PWM chip U, is specially current sense resistor R exports one end from the electric current detected to PWM chip U;
The first end of the first electric capacity C1 connects with the negative pole of reverse protection diode D2, the second end ground connection;
The plus earth of Schottky diode D3, negative pole connects with the first end of the first electric capacity C1;
The positive pole of feedback diode D4 connects with the first end of inductance L, and the interface that negative pole detects with PWM chip U received current the electric current that resistance R detects connects; The first end of inductance L connects with PWM chip U, is specially one end that inductance L receives the current feedback signal that PWM chip U exports;
One end of second electric capacity C2 connects with the first end of inductance L, other end ground connection.
Can be regulated the light of the dipped headlights of motor vehicle by LED control circuit shown in Fig. 4.
Optionally, in LED control circuit shown in Fig. 4, PWM chip U is chosen as T8304AD chip; Corresponding, Fig. 5 shows another structural representation being again applied to the LED control circuit of motor vehicle light source that the utility model embodiment provides, shown in composition graphs 4 and Fig. 5, in shown in Fig. 5, PWM chip U is specially T8304AD chip U2, can comprise: VIN interface with reference to Fig. 5, T8304AD chip U2, ISENSE interface, one LX interface, the 2nd LX interface, a GND interface and the 2nd GND interface;
Wherein, VIN interface connects with the first end of current sense resistor R, can detect the electric current that resistance R detects by received current;
Second end and the first power supply VCC1 of ISENSE interface and current detecting electricity R connect;
One LX interface and the 2nd LX interface connect with inductance L respectively;
One GND interface and the 2nd GND interface ground connection respectively.
Optionally, in the utility model embodiment, the visual actual needs of resistance of current sense resistor R is selected.
The LED control circuit of what the utility model embodiment provided be applied to motor vehicle light source, can regulate the electric current of light-emitting diode D1, realize controlling the luminosity of light-emitting diode D1.
The utility model embodiment also provides a kind of motor vehicle light source, and this motor vehicle light source comprises the described above LED control circuit being applied to motor vehicle light source.
Optionally, this motor vehicle light source can be automotive luminaire, as the day portable lighter of automobile, and dipped headlights etc.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. be applied to a LED control circuit for motor vehicle light source, it is characterized in that, comprising:
Connect with the positive pole of light-emitting diode D1, to the current sense resistor R that the electric current of light-emitting diode D1 detects;
Connect with described current sense resistor R, receive the electric current that described current sense resistor R detects, according to the PWM chip that setting current parameters and described electric current generation current feedback signal also export;
Connect with the negative pole of described PWM chip and described light-emitting diode D1 respectively, receive described current feedback signal, according to the inductance L that the electric current of described current feedback signal to described light-emitting diode D1 regulates.
2. the LED control circuit being applied to motor vehicle light source according to claim 1, is characterized in that, described LED control circuit is applied to the day portable lighter of motor vehicle, and described LED control circuit also comprises:
The first power supply connected with positive pole and the described PWM chip of described light-emitting diode D1 respectively;
Reverse protection diode D2, the positive pole of described reverse protection diode D2 connects second source, and negative pole connects with the first end of described current sense resistor R, and the first end of described current sense resistor R connects with described PWM chip;
Schottky diode D3, the plus earth of described Schottky diode D3, negative pole connects with the negative pole of described reverse protection diode D2;
The first electric capacity C1 in parallel with described Schottky diode D3, one end ground connection of described first electric capacity C1, the other end connects with the negative pole of described reverse protection diode D2;
The interface that positive pole and the described PWM chip of feedback diode D4, described feedback diode D4 export described current feedback signal connects, and the interface that negative pole receives described electric current with described PWM chip connects;
Second electric capacity C2, one end of described second electric capacity C2 connects with the first end of described inductance L, other end ground connection, and the first end of described inductance L connects with described PWM chip.
3. the LED control circuit being applied to motor vehicle light source according to claim 2, is characterized in that, described PWM chip is T6322A chip, and described T6322A chip comprises:
Received current detects the VIN interface of the electric current that resistance R detects;
Export a LX interface of described current feedback signal;
The 2nd LX interface connected with described first power supply;
The GND interface of ground connection.
4. the LED control circuit being applied to motor vehicle light source according to claim 1, is characterized in that, described LED control circuit is applied to the dipped headlights of motor vehicle, and described LED control circuit also comprises:
The first power supply connected with positive pole and the described PWM chip of described light-emitting diode D1 respectively;
Reverse protection diode D2, the positive pole of described reverse protection diode D2 connects second source, and negative pole connects with the first end of described current sense resistor R, and the first end of described current sense resistor R connects with described PWM chip;
The first end of the first electric capacity C1, described first electric capacity C1 connects with the negative pole of described reverse protection diode D2, the second end ground connection;
Schottky diode D3, the plus earth of described Schottky diode D3, negative pole connects with the first end of described first electric capacity C1;
Feedback diode D4, the positive pole of described feedback diode D4 connects with the first end of described inductance L, and the interface that negative pole receives described electric current with described PWM chip connects, and the first end of described inductance L connects with described PWM chip;
Second electric capacity C2, one end of described second electric capacity C2 connects with the first end of described inductance L, other end ground connection.
5. the LED control circuit being applied to motor vehicle light source according to claim 4, is characterized in that, described PWM chip is T8304AD chip, and described T8304AD chip comprises:
The VIN interface connected with the first end of described current sense resistor R;
The ISENSE interface connected with second end of described current sense resistor R;
The LX interface connected with described inductance;
The 2nd LX interface connected with described inductance;
One GND interface of ground connection;
2nd GND interface of ground connection.
6. the LED control circuit being applied to motor vehicle light source according to any one of claim 1-5, is characterized in that, also comprise:
Connect with described PWM chip, input the input unit of setting current parameters for driver.
7. the LED control circuit being applied to motor vehicle light source according to claim 6, is characterized in that, described input unit comprises: knob, button or touch-screen.
8. the LED control circuit being applied to motor vehicle light source according to claim 1, is characterized in that, the minus earth of described light-emitting diode D1.
9. a motor vehicle light source, is characterized in that, comprises the LED control circuit being applied to motor vehicle light source described in any one of claim 1-8.
10. motor vehicle light source according to claim 9, is characterized in that, described motor vehicle light source is automotive luminaire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520396847.6U CN204721668U (en) | 2015-06-10 | 2015-06-10 | A kind of LED control circuit and motor vehicle light source being applied to motor vehicle light source |
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| CN201520396847.6U CN204721668U (en) | 2015-06-10 | 2015-06-10 | A kind of LED control circuit and motor vehicle light source being applied to motor vehicle light source |
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| CN204721668U true CN204721668U (en) | 2015-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922478A (en) * | 2021-10-19 | 2022-01-11 | 探骊动力科技(重庆)有限公司 | Control method of voltage-reducing flash integrated controller |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922478A (en) * | 2021-10-19 | 2022-01-11 | 探骊动力科技(重庆)有限公司 | Control method of voltage-reducing flash integrated controller |
| CN113922478B (en) * | 2021-10-19 | 2024-07-26 | 探骊动力科技(重庆)有限公司 | Control method of voltage-reducing and flashing integrated controller |
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