CN204377199U - Adopt constant current driver circuit for LED and the device of step-down constant current driving unit - Google Patents
Adopt constant current driver circuit for LED and the device of step-down constant current driving unit Download PDFInfo
- Publication number
- CN204377199U CN204377199U CN201520013138.5U CN201520013138U CN204377199U CN 204377199 U CN204377199 U CN 204377199U CN 201520013138 U CN201520013138 U CN 201520013138U CN 204377199 U CN204377199 U CN 204377199U
- Authority
- CN
- China
- Prior art keywords
- constant current
- power supply
- led
- unit
- driving unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The utility model relates to a kind of constant current driver circuit for LED and the device that adopt step-down constant current driving unit, the DC power supply of constant current driver circuit for LED provides distance light end power supply and dipped beam end power supply two kinds of power supplys, reverse polarity protection's unit carries out reverse polarity protection to constant current driver circuit for LED, the distance light end power supply or dipped beam end power supply that have passed through reverse polarity protection's unit are carried out step-down constant current by step-down constant current driving unit, and the distance light end power supply after step-down constant current or dipped beam end power supply are supplied to LED illumination unit, with driving LED lighting unit, the distance light end power supply that distance-light unit reception DC power supply provides or dipped beam end power supply, and control the switching that LED illumination unit carries out between distance light end and dipped beam end.Constant current driver circuit for LED of the present utility model and comprise the LED automobile illumination device of this circuit, the distance-light that can realize LED illumination module regulates, and has structure simple, the feature of stable performance.
Description
Technical field
The utility model relates to LED automobile lamp lighting field, refers more particularly to a kind of LED step-down constant-current drive circuit and comprises the LED automobile illumination device of this circuit.The utility model also comprises a kind of LED automobile lamp using this circuit.
Background technology
Along with the development of science and technology, LED is as novel green light source, and it has energy-saving and environmental protection, efficiently feature, and technology is ripe and be applied to every field, LED as automotive lighting new light sources by extensively
, also there is various LED drive circuit in general use thereupon.The connected mode that LED automobile lamp is in parallel again after adopting many great power LED series connection, this just requires that LED drive circuit has input voltage wide, the feature that drive current is large.
Current LED lamp drive circuit adopts the type of drive of constant-current driven chip and external metal-oxide-semiconductor large to ensure the electric current needed for LED automobile lamp, the characteristic that constant current is stable.Another constant-current driven chip input voltage range is narrow, need arrange decompression voltage regulator in the driving circuit.The many employings of distance-light commutation circuit two constant-current drive circuits, realize distance-light switching by controlling one of them control circuit, this circuit has circuit complexity, cost high, the shortcoming that fragile and power consumption is high.Also have minority to adopt a drive circuit to realize distance-light to switch, but be also that element is many, circuit is complicated, separately separately need connect power supply from automobile accumulator jar, and this just causes and uses inconvenience, and drive circuit is also in live line work state always, causes power consumption excessive.
Utility model content
In order to solve above-mentioned technical problem of the prior art, the utility model be to propose a kind of simple, under wide range input voltage condition also can constant current output, high efficiency, low cost step-down drive circuit.
The purpose of this utility model realizes by following technical measures: the constant current driver circuit for LED adopting step-down constant current driving unit, the constant current driver circuit for LED of described employing step-down constant current driving unit comprises DC power supply, reverse polarity protection's unit, step-down constant current driving unit and distance-light unit, described DC power supply provides distance light end power supply and dipped beam end power supply two kinds of power supplys, the input of described reverse polarity protection's unit is connected to described DC power supply, and reverse polarity protection is carried out to described constant current driver circuit for LED, the power input of described step-down constant current driving unit is connected to the output of described reverse polarity protection's unit, the distance light end power supply or dipped beam end power supply that have passed through described reverse polarity protection's unit are carried out step-down constant current, and the distance light end power supply after step-down constant current or dipped beam end power supply are supplied to LED illumination unit, to drive described LED illumination unit, described distance-light unit is connected to described DC power supply, described reverse polarity protection's unit, described step-down constant current driving unit and described LED illumination unit, receive distance light end power supply or dipped beam end power supply that described DC power supply provides, and control the switching that described LED illumination unit carries out between distance light end and dipped beam end.
The purpose of this utility model also realizes by following technical measures:
Described reverse polarity protection's unit comprises distance light end Schottky diode and dipped beam end Schottky diode; the anode of described distance light end Schottky diode is connected to the positive pole of the distance light end power supply of described DC power supply; the anode of described dipped beam end Schottky diode is connected to the positive pole of the dipped beam end power supply of described DC power supply; the negative electrode of described distance light end Schottky diode and described dipped beam end Schottky diode connects together, and is connected to the power input of described step-down constant current driving unit.
Described step-down constant current driving unit comprises step-down current constant control chip, energy storage inductor, first electrodeless electric capacity and fly-wheel diode, the power input pin of described step-down current constant control chip is connected to the output of described reverse polarity protection's unit, the grounding pin ground connection of described step-down current constant control chip, the CS pin of described step-down current constant control chip is connected to the negative electrode of light-emitting diode in described LED illumination unit, one end of described first electrodeless electric capacity is connected to the power input pin of described step-down current constant control chip, the other end is connected to the VC pin of described step-down current constant control chip, one end of described energy storage inductor is connected to the SW pin of described step-down current constant control chip, the other end is connected to the anode of light-emitting diode in described LED illumination unit, the plus earth of described fly-wheel diode, negative electrode is connected to the SW pin of described step-down current constant control chip.
Described step-down constant current driving unit also comprises first electrode capacitance, and described first has the positive pole of electrode capacitance to be connected to the other end of described energy storage inductor, minus earth.
Described step-down constant current driving unit also comprises the second electrodeless electric capacity and second electrode capacitance; described second has the positive pole of electrode capacitance to be connected to the output of described reverse polarity protection's unit; minus earth, described second electrodeless electric capacity is parallel to positive pole and the negative pole that described second has electrode capacitance.
Described first electrodeless electric capacity and described second electrodeless electric capacity are ceramic condenser, and described first has electrode capacitance and described second to have electrode capacitance to be electrochemical capacitor.
Described distance-light unit comprises metal-oxide-semiconductor, first sampling resistor, second sampling resistor, 3rd sampling resistor, 4th sampling resistor and divider resistance, one end of described divider resistance is connected to the positive pole of the distance light end power supply of described DC power supply, the other end is connected to the pin 4 of described metal-oxide-semiconductor, the pin 1 of described metal-oxide-semiconductor, 2, 3 and after connecing, be connected to the one end of described first sampling resistor and described second sampling resistor be connected in parallel, described first sampling resistor be connected in parallel and the other end of described second sampling resistor are connected to the CS pin of described step-down current constant control chip, the pin 5 of described metal-oxide-semiconductor, 6, 7, 8 and after connecing, be connected to the one end of described 3rd sampling resistor and described 4th sampling resistor be connected in parallel, described 3rd sampling resistor be connected in parallel and the other end of described 4th sampling resistor are connected to the CS pin of described step-down current constant control chip.
Described distance-light unit also comprises bleeder resistance and voltage stabilizing didoe, and one end of described bleeder resistance is connected to the pin 4 of described metal-oxide-semiconductor, other end ground connection, and the negative electrode of described voltage stabilizing didoe is connected to the pin 4 of described metal-oxide-semiconductor, plus earth.
Described LED illumination unit comprises light emitting diode matrix, and described LED array structure is multiple branch circuit parallel connection or single spur track cascade.
The purpose of this utility model also realizes by following technical measures: a kind of LED automobile illumination device, and described LED automobile illumination device includes the constant current driver circuit for LED of above-mentioned employing step-down constant current driving unit.
The constant current driver circuit for LED of the employing step-down constant current driving unit in the utility model and LED automobile illumination device, even if when making the input voltage when wide-range input voltage change by control chip, metal-oxide-semiconductor, lighting module etc., the electric current flowing through LED can not be made to occur larger fluctuating, to ensure the luminosity of LED.In addition, by the connection of high-pressure side and metal-oxide-semiconductor, regulated the resistance sizes of input circuit by metal-oxide-semiconductor internal circuit, then realize the size of the electric current regulating input circuit, the distance-light finally realizing LED illumination module regulates.There is structure simple, the feature of stable performance.
Accompanying drawing explanation
Fig. 1 is a kind of module map adopting a specific embodiment of the constant current driver circuit for LED of step-down constant current driving unit of the utility model;
Fig. 2 is a kind of circuit diagram adopting a specific embodiment of the constant current driver circuit for LED of step-down constant current driving unit of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that embodiment described herein only for explaining the utility model, and do not limit the utility model.
As shown in Figure 1, Fig. 1 is the module map of a specific embodiment of the constant current driver circuit for LED of employing step-down constant current driving unit of the present utility model.This constant current driver circuit for LED comprises DC power supply A, reverse polarity protection's unit B, step-down constant current driving unit C and distance-light unit E.DC power supply A provides distance light end power supply and dipped beam end power supply two kinds of power supplys.Reverse polarity protection's unit B is connected to DC power supply A, and carries out reverse polarity protection to constant current driver circuit for LED.Step-down constant current driving unit C is connected to reverse polarity protection's unit B; and the distance light end power supply or dipped beam end power supply that have passed through reverse polarity protection's unit B are carried out step-down constant current; and the distance light end power supply after step-down constant current or dipped beam end power supply are supplied to LED illumination unit D, with driving LED lighting unit D.Distance-light unit E is connected to DC power supply A, reverse polarity protection's unit B, step-down constant current driving unit C and LED illumination unit D; the distance light end power supply that theres is provided of DC power supply A or dipped beam end power supply are provided, and control the switching that LED illumination unit D carries out between distance light end and dipped beam end.In one example, DC power supply A provides the DC power supply of 8 ~ 36V.The power output end of step-down constant current driving unit C is as the power output end of whole LED drive circuit, alternatively, the power output end of step-down constant current driving unit C is electrically connected with the power output end of whole LED drive circuit, and the power output end of whole LED drive circuit is used for providing power supply to LED illumination unit D.
As shown in Fig. 2, Fig. 2 is a kind of circuit diagram adopting a specific embodiment of the constant current driver circuit for LED of step-down constant current driving unit of the utility model.Reverse polarity protection's unit B comprises distance light end Schottky diode D1 and dipped beam end Schottky diode D2.Step-down constant current driving unit C comprises energy storage inductor L1, the first electrodeless electric capacity C1, the second electrodeless electric capacity C2, first has electrode capacitance C3, second to have electrode capacitance C4, sustained diode 3 and step-down current constant control chip U1.The anode of distance light end Schottky diode D1 is connected to the positive pole VH+ of distance light end power supply.The anode of dipped beam end Schottky diode D2 is connected to the positive pole VL+ of dipped beam end power supply.The negative electrode of distance light end Schottky diode D1 and dipped beam end Schottky diode D2 connects together, and be connected to the power input of step-down constant current driving unit C, i.e. working power input pin 5 pin (VIN) electrical connection of step-down current constant control chip U1.When power positive cathode wrong, due to the single-phase conduction of Schottky diode, reverse polarity protection is played to circuit.
As shown in Fig. 2, in step-down constant current driving unit C, working power input pin 5 pin (VIN) of step-down current constant control chip U1 and the power output end of reverse polarity protection's unit B, namely the cathodic electricity of D1, D2 connects; Closed the sampling resistor electrical connection in unit B by distance as shown in Figure 1 between grounding leg 1 pin (GND) of step-down current constant control chip U1 and current detecting pin 2 pin (CS); Second has electrode capacitance C4 to be connected in parallel between the power output end of described reversed polarity unit B and the grounding leg of described step-down current constant control chip U1, in order to prevent large transient voltage, stress release treatment.Second electrodeless electric capacity C2 is connected in parallel on second has electrode capacitance C4 two ends, in order to carry out high frequency decoupling.First has electrode capacitance C3 to be connected in parallel between the diode anode of LED illumination unit D and ground, to reduce output ripple voltage.First electrodeless electric capacity C1 is connected in parallel between U1 chip 5 pin and 4 pin, as chip internal voltage regulator shunt capacitance.
In one embodiment, the first electrodeless electric capacity C1 and the second electrodeless electric capacity C2 is ceramic condenser.First has electrode capacitance C3 and second to have electrode capacitance C4 to be electrochemical capacitor.
As shown in Fig. 2, described step-down constant current driving unit C also comprises sustained diode 3, the plus earth of this sustained diode 3.The negative electrode of sustained diode 3 is electrically connected with driving pin 3 pin (SW) of step-down current constant control chip U1.When U1 built-in power MOS pipe disconnects, the sampling resistor in energy storage inductor L1, LED illumination unit D distance-light unit E and sustained diode 3 form a current circuit, in order to the illumination of lighting unit D.
One end of energy storage inductor L1 is connected to the negative electrode of sustained diode 3, and the other end is connected to the input of LED illumination unit D.
The operation principle of step-down current constant control chip U1 be according to sampling resistor RCS above pressure drop, 3 pin (SW) of automatic adjustment constant current integrated chip U1 export the duty cycle of switching of pulse, in one-period, the built-in metal-oxide-semiconductor of U1 disconnects, 3 pin (SW) export high level, current circuit forms current circuit, for LED provides electric current and energy storage inductor L1 storage power through energy storage inductor L1, LED, sampling resistor RCS, MOS pipe U2 to the negative pole of DC power supply A; When the conducting of constant current integrated chip U1 built-in power MOS pipe, the 3 pin output low levels of U1, electric power loop is closed, according to the operating characteristic of inductance component, energy storage inductor L1 stores electric energy, forms loop, for LED provides operating current through energy storage inductor L1, LED, sustained diode 3, sampling resistor RCS, MOS pipe U2, until the built-in metal-oxide-semiconductor conducting of next cycle U1, thus reach the object of constant current.
Therefore, as long as the resistance of the sampling resistor in distance-light unit E is determined, so export constant current and namely determine.The 2 pin sampling pin of constant current integrated chip U1 and the reference voltage source of constant current integrated chip U1 inside form a comparator, sampling pin 2 heel according to the employing voltage of sampling resistor and reference voltage relatively after, the inner adjustment automatically of constant current integrated chip U1 controls the duty ratio that pulse was opened, closed to built-in metal-oxide-semiconductor; If sampled voltage is greater than reference voltage, illustrate that output current is greater than set point, so the duty ratio of pulse just reduces, reduce output current to set point, if sampled voltage is less than reference voltage, illustrate that output current is less than set point, the duty ratio of so pulse just increases, and increases output current to set point.
Distance-light unit E, it comprises metal-oxide-semiconductor U2, the first sampling resistor RS1, the second sampling resistor RS2, the 3rd sampling resistor RS3, the 4th sampling resistor RS4, divider resistance R1, bleeder resistance R2 and voltage stabilizing didoe W1.
The pin 4 of described metal-oxide-semiconductor U2 is connected with distance light end VH+ by divider resistance R1, and described pin 4 is connected with the negative electrode of voltage stabilizing didoe W1 simultaneously, the plus earth of described voltage stabilizing didoe W1, and described pin 4 is by bleeder resistance R2 ground connection; The pin 1,2,3 of described metal-oxide-semiconductor U2 is also connected with the CS pin of chip U1 by resistance RS1, RS2 after connecing, the pin 5,6,7,8 of metal-oxide-semiconductor is also connected with the CS pin of chip U1 by resistance RS3, RS4 after connecing, and is connected while described resistance RS1, RS2, RS3, RS4 are connected with the CS pin of chip U1 with the negative electrode of the light-emitting diode in described LED illumination module.
When power supply is added between distance light end VH+ and GND, DC voltage electrode is electrically connected with metal-oxide-semiconductor U2 by divider resistance R1, at this moment the voltage be added on metal-oxide-semiconductor U2 pin 4 makes metal-oxide-semiconductor U2 conducting, and now sampling resistor resistance is the parallel resistance resistance of RS1, RS2, RS3 and RS4; When power supply is added between dipped beam end VL+ and GND, the voltage be at this moment added on metal-oxide-semiconductor U2 pin 4 is 0, metal-oxide-semiconductor U2 to turn off, and now sampling resistor resistance is the parallel resistance resistance of RS1 and RS2; By conducting and the shutoff of metal-oxide-semiconductor U2, thus change the size of sampling resistor, then change the size of output current, reach the object that distance-light switches.A voltage stabilizing didoe W1 and bleeder resistance R2 in parallel at power MOS pipe two ends, plays protection to metal-oxide-semiconductor U2 and turns off fast.
In one embodiment, U1 inside has voltage-releasing voltage stabilizer, when DC power supply occur in change between 9-30V time, also can ensure the output of driving LED constant current.
In one embodiment, U1 internal temperature compensation circuit can compensate the outside line loss of PCB and system application.When junction temperature or power output rise, CS voltage can be compensated.U1 inside is provided with overheat protector function, to ensure that system stability works reliably.When IC chip temperature exceeds 150 DEG C, namely IC can enter guard mode and stop electric current exporting, and when temperature lower than 125 time, namely IC can return to operating state again.
In one embodiment, the light emitting diode array structure in LED illumination unit D is multiple branch circuit parallel connection or single spur track cascade.
In one embodiment, step-down current constant control chip U1 is XL3003 cake core, and metal-oxide-semiconductor U2 is F7821 cake core.
The utility model has only used a drive circuit, has saved cost; It is the brightness of all LED that distance-light switches what change, and control effects is good, peripheral circuit is simple, power consumption is little; The built-in metal-oxide-semiconductor of driving chip, has saved cost; Adopt step-down constant current chip, be applicable to the occasion of output voltage lower than input voltage.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims; Further, each technical characteristic listed above, it mutually combines and can form each embodiment, should be regarded as the scope belonging to the record of the utility model specification.For the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. adopt the constant current driver circuit for LED of step-down constant current driving unit, it is characterized in that, the constant current driver circuit for LED of described employing step-down constant current driving unit comprises DC power supply, reverse polarity protection's unit, step-down constant current driving unit and distance-light unit, described DC power supply provides distance light end power supply and dipped beam end power supply two kinds of power supplys, the input of described reverse polarity protection's unit is connected to described DC power supply, and reverse polarity protection is carried out to described constant current driver circuit for LED, the power input of described step-down constant current driving unit is connected to the output of described reverse polarity protection's unit, the distance light end power supply or dipped beam end power supply that have passed through described reverse polarity protection's unit are carried out step-down constant current, and the distance light end power supply after step-down constant current or dipped beam end power supply are supplied to LED illumination unit, to drive described LED illumination unit, described distance-light unit is connected to described DC power supply, described reverse polarity protection's unit, described step-down constant current driving unit and described LED illumination unit, receive distance light end power supply or dipped beam end power supply that described DC power supply provides, and control the switching that described LED illumination unit carries out between distance light end and dipped beam end.
2. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 1, it is characterized in that, described reverse polarity protection's unit comprises distance light end Schottky diode and dipped beam end Schottky diode, the anode of described distance light end Schottky diode is connected to the positive pole of the distance light end power supply of described DC power supply, the anode of described dipped beam end Schottky diode is connected to the positive pole of the dipped beam end power supply of described DC power supply, the negative electrode of described distance light end Schottky diode and described dipped beam end Schottky diode connects together, and be connected to the power input of described step-down constant current driving unit.
3. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 2, it is characterized in that, described step-down constant current driving unit comprises step-down current constant control chip, energy storage inductor, first electrodeless electric capacity and fly-wheel diode, the power input pin of described step-down current constant control chip is connected to the output of described reverse polarity protection's unit, the grounding pin ground connection of described step-down current constant control chip, the CS pin of described step-down current constant control chip is connected to the negative electrode of light-emitting diode in described LED illumination unit, one end of described first electrodeless electric capacity is connected to the power input pin of described step-down current constant control chip, the other end is connected to the VC pin of described step-down current constant control chip, one end of described energy storage inductor is connected to the SW pin of described step-down current constant control chip, the other end is connected to the anode of light-emitting diode in described LED illumination unit, the plus earth of described fly-wheel diode, negative electrode is connected to the SW pin of described step-down current constant control chip.
4. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 3, it is characterized in that, described step-down constant current driving unit also comprises first electrode capacitance, and described first has the positive pole of electrode capacitance to be connected to the other end of described energy storage inductor, minus earth.
5. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 4; it is characterized in that; described step-down constant current driving unit also comprises the second electrodeless electric capacity and second electrode capacitance; described second has the positive pole of electrode capacitance to be connected to the output of described reverse polarity protection's unit; minus earth, described second electrodeless electric capacity is parallel to positive pole and the negative pole that described second has electrode capacitance.
6. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 5, it is characterized in that, described first electrodeless electric capacity and described second electrodeless electric capacity are ceramic condenser, and described first has electrode capacitance and described second to have electrode capacitance to be electrochemical capacitor.
7. the constant current driver circuit for LED of the employing step-down constant current driving unit as described in Claims 2 or 3 or 5, it is characterized in that, described distance-light unit comprises metal-oxide-semiconductor, first sampling resistor, second sampling resistor, 3rd sampling resistor, 4th sampling resistor and divider resistance, one end of described divider resistance is connected to the positive pole of the distance light end power supply of described DC power supply, the other end is connected to the pin 4 of described metal-oxide-semiconductor, the pin 1 of described metal-oxide-semiconductor, 2, 3 and after connecing, be connected to the one end of described first sampling resistor and described second sampling resistor be connected in parallel, described first sampling resistor be connected in parallel and the other end of described second sampling resistor are connected to the CS pin of described step-down current constant control chip, the pin 5 of described metal-oxide-semiconductor, 6, 7, 8 and after connecing, be connected to the one end of described 3rd sampling resistor and described 4th sampling resistor be connected in parallel, described 3rd sampling resistor be connected in parallel and the other end of described 4th sampling resistor are connected to the CS pin of described step-down current constant control chip.
8. the constant current driver circuit for LED adopting step-down constant current driving unit as claimed in claim 7, it is characterized in that, described distance-light unit also comprises bleeder resistance and voltage stabilizing didoe, one end of described bleeder resistance is connected to the pin 4 of described metal-oxide-semiconductor, other end ground connection, the negative electrode of described voltage stabilizing didoe is connected to the pin 4 of described metal-oxide-semiconductor, plus earth.
9. the constant current driver circuit for LED of the employing step-down constant current driving unit as described in claim 1 or 3, it is characterized in that, described LED illumination unit comprises light emitting diode matrix, and described LED array structure is multiple branch circuit parallel connection or single spur track cascade.
10.LED car headlight device, is characterized in that, described LED automobile illumination device comprises the constant current driver circuit for LED of the employing step-down constant current driving unit according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520013138.5U CN204377199U (en) | 2015-01-09 | 2015-01-09 | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520013138.5U CN204377199U (en) | 2015-01-09 | 2015-01-09 | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204377199U true CN204377199U (en) | 2015-06-03 |
Family
ID=53333372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520013138.5U Withdrawn - After Issue CN204377199U (en) | 2015-01-09 | 2015-01-09 | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204377199U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582183A (en) * | 2015-01-09 | 2015-04-29 | 嘉兴市光泰照明有限公司 | LED constant-current drive circuit with voltage-drop constant-current drive unit and device |
| CN107135581A (en) * | 2017-07-02 | 2017-09-05 | 深圳市青蓝半导体有限公司 | A kind of distance-light lamp lighting control circuit based on linear constant current |
| CN108093506A (en) * | 2016-11-23 | 2018-05-29 | 常州星宇车灯股份有限公司 | A kind of daytime running lights and the LED drive circuit of position lamp multiplexing |
-
2015
- 2015-01-09 CN CN201520013138.5U patent/CN204377199U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582183A (en) * | 2015-01-09 | 2015-04-29 | 嘉兴市光泰照明有限公司 | LED constant-current drive circuit with voltage-drop constant-current drive unit and device |
| CN104582183B (en) * | 2015-01-09 | 2017-07-11 | 嘉兴市光泰照明有限公司 | A kind of constant current driver circuit for LED and device using step-down constant current driving unit |
| CN108093506A (en) * | 2016-11-23 | 2018-05-29 | 常州星宇车灯股份有限公司 | A kind of daytime running lights and the LED drive circuit of position lamp multiplexing |
| CN108093506B (en) * | 2016-11-23 | 2024-04-19 | 常州星宇车灯股份有限公司 | LED drive circuit for multiplexing daytime running light and position light |
| CN107135581A (en) * | 2017-07-02 | 2017-09-05 | 深圳市青蓝半导体有限公司 | A kind of distance-light lamp lighting control circuit based on linear constant current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101389168B (en) | High-voltage large power LCD constant current driving device | |
| CN102711307B (en) | Dimmable light-emitting diode (LED) drive circuit and lamp | |
| CN102105007B (en) | LED constant-current driver with boosting function | |
| CN202818699U (en) | LED automotive headlamp drive circuit | |
| CN101711071B (en) | LED control circuit and LED device | |
| CN101212850B (en) | Pulsed driven LED lighting circuit | |
| CN104768265A (en) | High-power LED constant-current driving circuit | |
| CN102612197B (en) | LED (light emitting diode) driving circuit and LED lamp using same | |
| CN104582183A (en) | LED constant-current drive circuit with voltage-drop constant-current drive unit and device | |
| CN204377199U (en) | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit | |
| CN104582182B (en) | LED constant-current drive circuit with double-drive unit and lighting device | |
| CN104470099B (en) | Light emitting diode driving circuit | |
| CN203675400U (en) | LED drive device, battery charger and drive control circuit thereof | |
| CN204377198U (en) | Adopt constant current driver circuit for LED and the device of Dual Drive unit | |
| CN201937925U (en) | LED constant current driver with function of voltage reduction | |
| CN1725927A (en) | LED chip drive circuit | |
| CN202455626U (en) | LED (light emitting diode) spotlight driving power supply | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN104955216B (en) | The constant current driver circuit for LED and device of a kind of use voltage increase and current constant driver element | |
| CN204377200U (en) | Adopt constant current driver circuit for LED and the device of voltage increase and current constant driver element | |
| CN102791063A (en) | Intelligent LED module with function of automatic voltage regulation | |
| US20190166663A1 (en) | Currnet holding circuit for bidirectional triode thyristor dimmer and linear dimming driving circuit using the same | |
| CN205071365U (en) | Emitting diode lighting drive circuit and lamps and lanterns | |
| CN208707993U (en) | A kind of driving circuit for automobile lamp list lamp | |
| CN203596940U (en) | LED constant current source driver having power factor correction function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Dai Xuefeng Inventor after: Chen Jia Inventor after: Gao Mingyu Inventor after: Zhu Dongliang Inventor before: Dai Xuefeng Inventor before: Chen Jia Inventor before: Zhu Dongliang |
|
| COR | Change of bibliographic data | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150603 Effective date of abandoning: 20170711 |