CN204191007U - Led drive device - Google Patents
Led drive device Download PDFInfo
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- CN204191007U CN204191007U CN201420696110.1U CN201420696110U CN204191007U CN 204191007 U CN204191007 U CN 204191007U CN 201420696110 U CN201420696110 U CN 201420696110U CN 204191007 U CN204191007 U CN 204191007U
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- optical driver
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Abstract
The utility model discloses a kind of LED drive device, comprise the input filter module (1), bridge rectifier module (2), DC modular converter (3), tunable optical driver module (4) and the LED light source module (5) that connect successively, also comprise wireless communication module (6), described wireless communication module (6) exports the Enable Pin of different PWM ripples to described tunable optical driver module (4), and described tunable optical driver module (4) regulates the electric current flowing through described LED light source module (5) according to described PWM ripple.LED drive device efficiency of the present utility model is high, and cost is low.
Description
Technical field
The utility model relates to a kind of drive unit, particularly a kind of LED drive device.
Background technology
In prior art, LED illumination adopts constant current drive mode substantially.In order to play the energy-conservation advantage of LED illumination better, in LED driver, add dimming function is trend of the times.Usually, the dimming mode of LED driver has 3 kinds: controllable silicon light modulation, simulation light modulation, PWM light modulation.Often kind of dimming mode has its advantage and limitation.PWM light modulation makes switching circuit with sufficiently high frequency operation relative to eye recognition ability, and by arranging the cycle and duty ratio changes output current mean value, its output current only has two states: maximum rated operating current and zero current.Simulation light modulation is that the amplitude by changing output current realizes dimming function, and thyristor regulating is only by regulating the power output of power supply to realize dimming function.PWM light modulation can ensure the color temperature constant of LED, and the efficiency of driver is higher, and can accurately control, but its shortcoming needs MCU controller, with high costs.The relative PWM light adjusting circuit of simulation light modulation simply, easily realizes, but LED colour temperature can be made to change, and efficiency is low simultaneously, output current precision not easily regulates, dimming scope is limited.Thyristor regulating only utilizes existing controllable silicon dimmer, by changing the silicon controlled angle of flow, regulation output power realizes light modulation, its advantage to change original fluorescent lamp lighting network control, but shortcoming is more serious: it seriously can reduce drive efficiency and power factor, and LED also can be made to produce flicker simultaneously.
Utility model content
For the defect of prior art, the utility model provides a kind of LED drive device.
A kind of LED drive device, comprise the input filter module 1, bridge rectifier module 2, DC modular converter 3, tunable optical driver module 4 and the LED light source module 5 that connect successively, also comprise wireless communication module 6, described wireless communication module 6 exports the Enable Pin of different PWM ripples to described tunable optical driver module 4, and described tunable optical driver module 4 regulates the electric current flowing through described LED light source module 5 according to described PWM ripple.
Optionally, also wrap for detecting the detection module flowing through described LED light source module 5 electric current, described detection module is connected with LED light source detection module 5, the electric current that described tunable optical driver module 4 detects according to described PWM ripple and described detection module, regulates the electric current flowing through described LED light source module 5.
Optionally, described wireless communication module 6 is connected by ZigBee radio communication with far-end host computer, receives the control command of host computer, regulates the electric current flowing through described LED light source module 5 according to this instruction.
Optionally, described input filter module 1 is made up of the inductance L 1 be connected in electric power incoming line, electric capacity C1, inductance L 2 and electric capacity C2, and electric capacity C1, C2 are connected across on electric power incoming line, and inductance L 1, L2 are connected between electric capacity C1, C2, forms П shape filtration module 1.
Optionally, the input of described DC modular converter 3 forms resitstance voltage divider by resistance R9 and R10 and samples to input voltage, the output of DC modular converter 3 forms resitstance voltage divider by resistance R7 and R8 and samples to output voltage, input voltage and output voltage that DC conversion chip obtains according to sampling, regulate the output of DC modular converter 3.
Optionally, described DC modular converter 3 comprises APFC circuit, and described APFC circuit comprises and is connected to switching tube between DC bus and output capacitance, and booster diode is serially connected with on the DC bus between switching tube and boost capacitor.
Optionally, described tunable optical driver module 4 comprises driving chip, drives half-bridge and filter circuit, and the output of driving chip connects driving half-bridge, drives half-bridge to connect described LED light source module 5 through filter circuit.
Optionally, described tunable optical driver module 4 comprises driving chip, the two ends of described LED light source module 5 are parallel with the bleeder circuit be composed in series by resistance Rov1 and resistance Rov2, resistance Rov1 is connected with the enable pin of driving chip by electric capacity CEN and voltage stabilizing didoe Dov with the tie point of resistance Rov2, and the PWM output of described wireless communication module 6 is also connected to the enable pin of driving chip.
Optionally, described tunable optical driver module 4 has upper limit threshold voltage and lower limit threshold voltage, when the input voltage of tunable optical driver module 4 is greater than upper limit threshold voltage, described tunable optical driver module 4 enters disabled state, stops providing electric current to LED light source module 5; When tunable optical driver module 4 input voltage is less than lower limit threshold voltage, described tunable optical driver module 4 enters normal mode of operation.
The beneficial effects of the utility model are: the non-pole light regulating adopting PWM mode to realize light fixture controls, and has that power factor is high, efficiency is high, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model drive unit;
Fig. 2 is the circuit structure diagram of the utility model part of module;
Fig. 3 is the circuit structure diagram of the utility model tunable optical driver module;
Fig. 4 is the circuit structure diagram of the utility model wireless communication module.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing, make above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing in proportion, focus on purport of the present utility model is shown.
Refer to Fig. 1, LED drive device of the present utility model comprises input filter module 1, bridge rectifier module 2, DC modular converter 3, tunable optical driver module 4, LED light source module 5 and wireless communication module 6, and input filter module 1 adopts electromagnetic interface filter.The civil power of LED lamp power supply input 220Vac/50Hz, by electromagnetic interface filter suppression module to after the radiated interference of electrical network, through bridge rectifier module 2, AC is transformed to DC, DC after conversion exports two-way direct current through DC modular converter 3, wherein a road powers to wireless communication module 6, and another road powers to tunable optical driver module 4; Wireless communication module 6 take CC2530 as core, all LED lamp can be formed a wireless control network by wireless communication module 6, and each LED is a node in network, has independent and unique network ID.Light fixture regulates the output current of tunable optical driver module 4 after accepting brightness adjustment control order by CC2530 wireless module by exporting different PWM, thus realizes the brightness adjustment control to LED light source module 5.
The particular circuit configurations of input filter module 1, bridge rectifier module 2, DC modular converter 3 as shown in Figure 2, civil power is by input filter module 1 and bridge rectifier module 2 output ripple voltage, input filter module 1 is made up of the inductance L 1 be connected in electric power incoming line, electric capacity C1, inductance L 2 and electric capacity C2, electric capacity C1, C2 are connected across on electric power incoming line, inductance L 1, L2 are connected between electric capacity C1, C2, thus form П shape EMI filtration module, can be suppressed the radiated interference of electrical network by this filtration module.The output of filtration module 1 connects the input of rectification module 2, rectification module adopts H bridge rectification circuit, adopt controlled or uncontrollable rectification circuit, in embodiment of the present utility model, form uncontrollable H bridge rectification module by 4 uncontrollable diodes, by rectification module 2, AC rectification is become direct current.Between the positive and negative busbar that rectification module exports, be connected with smoothing capacity C3, the direct current that can be exported rectification by electric capacity is smoothing.It is core with L6561 that the output of rectification module 2 connects DC modular converter 3, DC modular converter 3.The input of DC modular converter 3 forms resitstance voltage divider by resistance R9 and R10 and samples, resistance R9 and R10 is series between positive and negative DC bus, 3 pin of IC1 are connected with the tie point of R9, R10, and resitstance voltage divider is detected by its internal multiplier through 3 pin of IC1 after sampling; The output of DC modular converter 3 forms resitstance voltage divider by resistance R7 and R8 and samples, resistance R7 and R8 is series between positive and negative DC bus, 1 pin of IC1 is connected with the tie point of R7, R8, and resitstance voltage divider is detected by its inner indifference amplifier through 1 pin of IC1 after sampling.The utility model takes single-stage inverse-excitation type APFC circuit, the APFC circuit working of this mode is in electric current critical conduction mode of operation, the capacity of the input capacitance of APFC circuit is very little (namely exchanging input commercial power rectification output filter capacitor capacity very little), and therefore the input voltage maximum of APFC circuit is very close to the peak value of output voltage after the rectification of interchange input line voltage.The power factor of this circuit is generally greater than 0.92, can meet the technical requirement about EMC and THD well.In the heavy duty application scenario of output, this circuit can obtain higher operating efficiency, general work efficiency, close to 90%, works in electric current critical conduction mode of operation and the conduction loss of APFC power switch pipe MOSFET can be made smaller, is conducive to the volume reducing radiator.APFC circuit comprises MOS1, diode D1 and electric capacity C7, VD is obtained at C7 two ends, in DC modular converter 3, boost inductance winding T1 is series on positive direct-current bus, by the electric current of boost inductance winding T1, sensed by its auxiliary winding, 5 pin through IC1 are input to inner zero current detector.Switching tube MOS1 and resistance R6 is connected in series between positive and negative DC bus, and the electric current flowing through switching tube MOS1 is converted to voltage signal on R6, and 4 pin through IC1 are input to inner current sensor.The output of IC1 internal multiplier, determines the thresholding of IC14 pin.When PWM on 7 pin of IC1 exports driven MOS 1 conducting, booster diode D1 ends, and all flows through MOS1 by the electric current of T1.When MOS ends, D1 conducting.The result that IC1 controls, makes the rectifier diode angle of flow be almost 180 °, AC input current continuous flow, and moment tracking AC-input voltage transient change track, and keep same-phase with AC-input voltage, in sinusoidal waveform, line power factor is brought up to more than 0.99.Meanwhile, PFC boost converter serves as high power factor switching.AC-input voltage is when 175 ~ 265V range, and total energy exports the burning voltage of 400V.
Fig. 3 is the circuit structure diagram of tunable optical driver module 4, the output of DC modular converter 3 connects the input of tunable optical driver module 4, tunable optical driver module 4 with IRS2541 (IC2) for core, electric capacity Cvcc1 is connected with between 1 pin of IRS2541 and 2 pin, be connected with positive direct-current bus after Cvcc1 and starting resistance Rs1 connect, output pin LO and the HO connecting valve M2 respectively of tunable optical driver module 4, M1, M1 and M2 can adopt MOS switching tube, M1 and M2 is series between positive and negative DC bus, be made up of M1 and M2 and drive half-bridge, the output of half-bridge drive circuit is connected with LED light source module 5, the tie point of M1 and M2 is the output of half-bridge in figure 3, its filter circuit consisted of with electric capacity inductance (inductance L 1 and electric capacity Cout) is connected with LED light source module 5.Circuit is charged to the electric capacity Cvcc1 on IC2 pin VCC by starting resistance Rs1.When voltage on Cvcc1 is more than VCC turn-on threshold, IC2 starts, LO (5 pin) sets high, HO (7 pin) sets low, and in one period of scheduled time of maintenance, drive half-bridge low-end switch M2 conducting, VCC voltage is then charged to electric capacity CBooT by bootstrap diode DBooT, set up VBS suspended voltage to power to high-pressure side, when CBooT fill with voltage reach IC2 inner high-side driver turn-on threshold level time, IC2 starts the requirement triggered according to regulation output current constant, feeds back control HO and LO height state by output electric current measure.Being biased on IC2 pin VCC is then provided by resistance Rs2 by output voltage Vout.LED light source module 5 detects resistance RC5 ground connection by feedback voltage, the other end of resistance RC5 is connected on the pin IFB of IC2 by resistance Rf, when the thresholding of the feedback voltage V IFB on IC2 pin IFB lower than 0.5V, HO sets high, LO sets low, then M1 conducting, half bridge output current passes through LED, load is from Absorption Current direct current line ball, outputting inductance L1 and electric capacity Cout stored energy, VIFB starts to increase, once VIFB is elevated to more than 0.5V, control ring is after delay THO OFF, turn off HO, then M1 cut-off, again after DT (Dead Time), LO opens, M2 is conducting then, energy storage in outputting inductance L1 and electric capacity Cout then discharges, electric current is still had to pass through in LED, and VIFB starts to reduce.And when VIFB is reduced to below 0.5V again, control ring, after delay THO ON, opens HO, then M1 conducting, then after DT (Dead Time), LO turns off, and M2 then ends, thus reaches the object of stable average current.
Refer to Fig. 4, wireless communication module 6 one aspect has the ZigBee radio communication function with host computer, can control driver module 4 by exporting PWM ripple thus realize driving the PWM of LED light source on the other hand.Wireless communication module 6 take CC2530 as core, and CC2530 is for one of IEEE 802.15.4, ZigBee and RF4CE application real SOC (system on a chip) (SoO) solution.It can set up powerful network node with low-down total material cost.CC2530 combines the premium properties of leading RF transceiver, the enhancement mode 8051CPU of industrywide standard, In-System Programmable flash memory, 8-KB RAM and other powerful functions many.CC2530 has four kinds of different flash versions: CC2530F32/64/128/256, has the flash memory of 32/64/128/256KB respectively.CC2530 has different operational modes, makes it especially adapt to the system of super low-power consumption requirement.Change-over time between operational mode is short further ensure that low energy expenditure.CC2530F256 combines the leading golden unit Zigbee protocol stack (Z-Stack of Texas Instrument
tM), provide a powerful and complete ZigBee solution.
The PWM output of wireless communication module 6 is connected with the control pin (enable pin) of tunable optical driver module, in Fig. 3, the threshold voltage upper limit of IRS2541 chip (driving chip) enable pin ENN is VENNTH+, when ENN pin input voltage is more than VENNTH+, chip enters disabled state, and circuit stops providing electric current to load.When on pin ENN, input voltage is less than lower voltage limit VENNTH-, chip reenters normal mode of operation.Therefore circuit inputs not Frequency and the pulse signal changing duty ratio on ENN pin, then the brightness PWM that can realize LED regulates.Specifically, the bleeder circuit be composed in series by resistance Rov1 and Rov2 is parallel with at the two ends of LED light source module 5, the tie point of Rov1 and Rov2 is connected with the enable pin of voltage stabilizing didoe Dov driving chip by electric capacity CEN, and the PWM output of wireless communication module 6 is also connected to the enable pin of driving chip.Flow through between LED average current and PWM duty ratio and there is linear relationship, PWM duty ratio is larger, and light output is then less, and brightness is also darker.If duty ratio is 20%, it is then 80% of maximum that LED light exports.The threshold voltage of the chip enable pin ENN of IRS2541 chip is about 2.5V, avoids threshold voltage too low on the one hand, makes external noise signals cause chip forbidden energy; The output pwm signal being applicable to microcontroller on the other hand carries out enable control to chip.Outside PWM enable control signal frequency is generally at several KHz, and frequency is too low will cause LED scintillation.The enable control signal of ENN of this circuit is provided by CC2530 wireless module.CC2530 module receiving system dim signal, produces corresponding pwm pulse signal and is input to ENN pin, realizes the enable control to drive circuit, and then realizes regulating LED array electric current, thus the non-pole light regulating realizing light fixture controls.
Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.
Claims (9)
1. a LED drive device, comprise the input filter module (1), bridge rectifier module (2), DC modular converter (3), tunable optical driver module (4) and the LED light source module (5) that connect successively, characterized by further comprising wireless communication module (6), described wireless communication module (6) exports the Enable Pin of different PWM ripples to described tunable optical driver module (4), and described tunable optical driver module (4) regulates the electric current flowing through described LED light source module (5) according to described PWM ripple.
2. LED drive device according to claim 1, it is characterized in that, also bag is used for the detection module that detection flows through described LED light source module (5) electric current, described detection module is connected with LED light source detection module (5), the electric current that described tunable optical driver module (4) detects according to described PWM ripple and described detection module, regulates the electric current flowing through described LED light source module (5).
3. LED drive device according to claim 1, it is characterized in that, described wireless communication module (6) is connected by ZigBee radio communication with far-end host computer, receive the control command of host computer, regulate the electric current flowing through described LED light source module (5) according to this instruction.
4. LED drive device according to claim 1, it is characterized in that, described input filter module (1) is made up of the inductance L 1 be connected in electric power incoming line, electric capacity C1, inductance L 2 and electric capacity C2, electric capacity C1, C2 are connected across on electric power incoming line, inductance L 1, L2 are connected between electric capacity C1, C2, form ∏ shape filtration module (1).
5. LED drive device according to claim 1, it is characterized in that, the input of described DC modular converter (3) forms resitstance voltage divider by resistance R9 and R10 and samples to input voltage, the output of DC modular converter (3) forms resitstance voltage divider by resistance R7 and R8 and samples to output voltage, input voltage and output voltage that DC conversion chip obtains according to sampling, regulate the output of DC modular converter (3).
6. LED drive device according to claim 1, it is characterized in that, described DC modular converter (3) comprises APFC circuit, described APFC circuit comprises and is connected to switching tube between DC bus and output capacitance, and booster diode is serially connected with on the DC bus between switching tube and boost capacitor.
7. LED drive device according to claim 1, it is characterized in that, described tunable optical driver module (4) comprises driving chip, drives half-bridge and filter circuit, the output of driving chip connects driving half-bridge, drives half-bridge to connect described LED light source module (5) through filter circuit.
8. LED drive device according to claim 1, it is characterized in that, described tunable optical driver module (4) comprises driving chip, the two ends of described LED light source module (5) are parallel with the bleeder circuit be composed in series by resistance Rov1 and resistance Rov2, resistance Rov1 is connected with the enable pin of driving chip by electric capacity CEN and voltage stabilizing didoe Dov with the tie point of resistance Rov2, and the PWM output of described wireless communication module (6) is also connected to the enable pin of driving chip.
9. LED drive device according to claim 1, it is characterized in that, described tunable optical driver module (4) has upper limit threshold voltage and lower limit threshold voltage, when the input voltage of tunable optical driver module (4) is greater than upper limit threshold voltage, described tunable optical driver module (4) enters disabled state, and stopping provides electric current to LED light source module (5); When tunable optical driver module (4) input voltage is less than lower limit threshold voltage, described tunable optical driver module (4) enters normal mode of operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420696110.1U CN204191007U (en) | 2014-11-19 | 2014-11-19 | Led drive device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420696110.1U CN204191007U (en) | 2014-11-19 | 2014-11-19 | Led drive device |
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| CN204191007U true CN204191007U (en) | 2015-03-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104411042A (en) * | 2014-11-19 | 2015-03-11 | 西安重装渭南光电科技有限公司 | LED (light emitting diode) drive device |
| CN105554956A (en) * | 2016-01-26 | 2016-05-04 | 安徽工程大学 | Light emitting diode (LED) lamp lighting system based on pulse width modulation (PWM) dimming |
| CN106163014A (en) * | 2016-08-31 | 2016-11-23 | 周鸿德 | LED with inductance step-down |
| CN107538484A (en) * | 2016-06-28 | 2018-01-05 | 沈阳新松机器人自动化股份有限公司 | A kind of host computer debugging apparatus applied to robot motor |
-
2014
- 2014-11-19 CN CN201420696110.1U patent/CN204191007U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104411042A (en) * | 2014-11-19 | 2015-03-11 | 西安重装渭南光电科技有限公司 | LED (light emitting diode) drive device |
| CN104411042B (en) * | 2014-11-19 | 2017-07-14 | 金华知产婺源信息技术有限公司 | Led drive device |
| CN105554956A (en) * | 2016-01-26 | 2016-05-04 | 安徽工程大学 | Light emitting diode (LED) lamp lighting system based on pulse width modulation (PWM) dimming |
| CN107538484A (en) * | 2016-06-28 | 2018-01-05 | 沈阳新松机器人自动化股份有限公司 | A kind of host computer debugging apparatus applied to robot motor |
| CN106163014A (en) * | 2016-08-31 | 2016-11-23 | 周鸿德 | LED with inductance step-down |
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