Utility model content
Technical problem to be solved in the utility model is to provide a kind of brightness energy-saving industrial LED illumination rod, has
Simple and reasonable, energy-efficient, safe and reliable, constant current is stable, flicker free, caloric value are low technical characterstic.
A kind of brightness energy-saving industrial LED illumination rod, including fluorescent tube, is provided with lightshade cover in described fluorescent tube, keeps away described
Being provided with drive circuit board in light shield, described drive circuit board being provided with drive circuit, described drive circuit board is connected with LED
Lamp bead circuit board, is provided with LED lamp bead on described LED lamp bead circuit board, and described fluorescent tube front end is provided with front plug, described lamp
Pipe rear end is provided with rear plug, is provided with water joint on rear plug, and described drive circuit board one end is connected with line, described
Line one end passes through water joint and extends to outside fluorescent tube.
Being provided with heat sink strip on described LED lamp bead circuit board, described heat sink strip having lamp bead hole, described lamp bead hole passes through
Heat sink strip is fitted on LED lamp bead circuit board by LED lamp bead, for dispelling the heat LED lamp bead.
Described lightshade cover top is provided with press strip, for being fixed lightshade cover, prevents it from rocking in fluorescent tube.
It is all arranged at intervals with lightening hole on described lightshade cover and press strip.
Described drive circuit include protective tube F1, the first resistance R1, the second resistance R2, the first electric capacity C1, the 3rd resistance R3,
4th resistance R4, the first diode D1, the second diode D2, the 5th resistance R5, the 3rd diode D3, the second electric capacity C2, the 3rd
Electric capacity C3, the first inductance L1, LED drive chip U1, the 6th resistance R6, the first voltage-stabiliser tube DZ1, the 7th resistance R7, the 4th electric capacity
C4, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, FET Q1, the 4th diode D4, the second inductance L2, the 3rd
Inductance L3, the 4th inductance L4, the 5th electric capacity C5, the 6th electric capacity C6 and LED string;
Wherein AC220V Alternating Current Power Supply carries out short-circuit protection through protective tube F1 to whole circuit, described first resistance R1 and
First electric capacity C1 is connected in parallel on AC220V Alternating Current Power Supply input, and described second resistance R2 is connected on the input of AC220V Alternating Current Power Supply
End, is connected in parallel on AC220V Alternating Current Power Supply input after described 3rd resistance R3 and the 4th resistance R4 series connection;
Described first resistance R1 protects product or element to be produced from switch or thunderbolt induction by 10N431K piezo-resistance
The impact of raw surging carries out overvoltage protection, and the second resistance R2 of concatenation AC220V current supply circuit is NTC33 thermistor, and effect is just
Being the surge current of suppression booting moment, the C1 electric capacity of AC220V Alternating Current Power Supply in parallel mainly improves power factor, parallel resistance
High voltage in rapid release circuit during R3, R4 then power-off, safety when making down circuitry.
Wherein AC220V alternating supply voltage is divided into two-way, and road second diode, the 5th resistance are connected to LED and drive core
The VIN pin of piece U1, described 3rd resistance one end is connected to the vdd terminal of LED drive chip U1, and the other end is grounded, and is that U1 chip is steady
Fixed power supply;Another road supply voltage is connected to the AC input of the first diode D1, and the positive terminal of the first diode D1 is through the first electricity
Sense L1 is respectively connected to second electric capacity C2 one end and the 3rd diode D3 one end, the other end of the second electric capacity C2 and the 3rd triode D3
It is all connected to the negative pole end of the first diode D1;
Second inductance L2, the 3rd inductance L3 and the 4th inductance L4 through being serially connected for the power cathode of described LED string
It is connected in the drain electrode of external power field effect pipe Q1, then through being just connected to the power supply of LED string through the 4th diode D4 again
Pole, forms an afterflow loop;
The RT pin of described LED drive chip U1 is connected to the grid of FET Q1 through the 6th R6 resistance and voltage-stabiliser tube DZ1,
PWM frequency is driven to set for LED string constant current;DZ1 is Q1 fet gate protection voltage-stabiliser tube, described LED drive chip U1
GATE pin output current controling signal be connected to the grid of FET Q1, for driving the grid of outside FET Q1;
It is serially connected on the source electrode of FET Q1 after described 8th resistance R8, the 9th resistance R9 and the tenth resistance R10 parallel connection,
8th resistance R8, the 9th resistance R9 and the tenth resistance R10 are LED string current sampling resistor, through the 4th C4 capacitance current sampling
Filtering, enters the LED string current sample CS input of LED drive chip U1, with LED after the 7th resistance R7 resistance current limliting
String, the GATE output signal of external FET, LED drive chip U1 form constant current close loop control circuit.
Described 5th electric capacity C5 and the 6th electric capacity C6 is connected in parallel between the both positive and negative polarity of LED string, as load filter capacitor.
Described LED drive chip U1 uses HV9910 control chip, is being depressured of a low cost, boosting, buck
Control chip.
LED lighting apparatus is characterised by: use HV9910 to be being depressured of a low cost, boosting, the control of buck
Coremaking piece, is particularly suitable for design driven multi-string LED or LED array.This chip is not only suitable for the AC exchange input of global general-use, also
It is applicable to the direct current input of 8-450V, during exchange input, for improving power factor (PF), EN 61000-3-2 Class C defined
The restriction of the AC harmonic of lighting apparatus, is less than 25W in input power, can add Passive Power factor easily in the line
Correcting circuit is achieved.HV9910 can drive the LED strip connection of up to a hundred high brightness or the LED of number string high brightness, these LED energy
Being designed to the mode that a string or connection in series-parallel combines, HV9910 be can ensure that LED luminance and spectrum by regulating constant current value and extends
Life-span.The characteristic of HV9910 is to enable the method regulation LED luminance that pin PWM_D can use pulsewidth modulation (PWM), doubles as making simultaneously
Energy end, when this end is unsettled, chip is without output control.HV9910 also can continuously adjust the defeated of LED by way of the linear pressure regulation of LD
Go out electric current thus control brightness (being also linearity light adjusting).For the employing of this chip, make whole circuit structure simple, reliable, high
The feature of effect, makes its driving force strong through external power field effect pipe, and power headroom is big, and the little advantage of caloric value carries for user
For efficient, reliable, energy-saving and environmental protection, the product of safety.Realize the outstanding output characteristics of LED illumination lamp: low heating, low consumption, height
Imitate energy-conservation characteristic, be especially used in work long hours, under the occasion of bad environments, efficient energy-saving sure effect is obvious.Its
Body technology has certain advance, simple in construction, cost relatively low, and output is stable, and heat dissipation capacity is little, promotes LED drive circuit very
Greatly, this allows for us and obtains the output of one group of comparatively ideal high-efficiency and energy-saving type power, it is achieved the purpose of utility model, shines for industry
Bright provide a kind of rational in infrastructure, export utility model stable, energy-efficient, that security reliability is high a LED drive
Lighting apparatus.
The appearance of this brightness energy-saving industrial LED illumination rod, will provide one efficient, highlighted, energy-conservation, just for industrial production
The superior illumination utensil taken.
The beneficial effects of the utility model are:
First, circuit design is novel.
2nd, making light emitting source with LED (row or array), caloric value is little, and (10W i.e. can reach incandescent lamp 100W's to brightness energy-saving
Illumination).
3rd, use components and parts less, safe and reliable.
4th, constant current is stable, flicker free, and colour temperature is stable, and brightness decay is slow.
5th, Φ 40 cylindrical outer shape, can fix use, it is possible to hand-held mobile use.
Detailed description of the invention
In order to make the utility model realize technological means, creation characteristic, reach purpose and be easy to understand with effect, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
As shown in figures 1 to 6, a kind of brightness energy-saving industrial LED illumination rod, including fluorescent tube 1, is provided with in described fluorescent tube 1 and keeps away
Light shield 2, is provided with drive circuit board 3 in described lightshade cover 2, and described drive circuit board 3 is provided with drive circuit, described drives
Dynamic circuit board 3 is connected with LED lamp bead circuit board 4, is provided with LED lamp bead 5, described fluorescent tube 1 on described LED lamp bead circuit board 4
Front end is provided with front plug 6, and described fluorescent tube 1 rear end is provided with rear plug 7, is provided with water joint 8 on rear plug 7, described
Drive circuit board 3 one end is connected with line 9, and described line 9 one end passes through water joint 8 and extends to outside fluorescent tube 1.Described LED
Being provided with heat sink strip 10 on lamp bead circuit board 4, described heat sink strip 10 having lamp bead hole 11, described lamp bead hole 11 passes through LED
Heat sink strip 10 is fitted on LED lamp bead circuit board 4 by pearl 5, for dispelling the heat LED lamp bead 5.On described lightshade cover, 2 set
It is equipped with press strip 12, for being fixed lightshade cover 2, prevent it from rocking in fluorescent tube 1.On described lightshade cover 2 and press strip 12 all
It is arranged at intervals with lightening hole.
Drive circuit as shown in Figure 7, AC220V Alternating Current Power Supply carries out short-circuit protection through F1 protective tube to whole circuit, and
The 10N431K piezo-resistance of connection AC220V Alternating Current Power Supply protects product or element from switch or the produced surging of thunderbolt induction
Impact carry out overvoltage protection, the effect of the NTC33 thermistor of concatenation AC220V current supply circuit suppresses booting moment
Surge current, the C1 electric capacity of AC220V Alternating Current Power Supply in parallel mainly improves power factor, rapid during parallel resistance R3, R4 then power-off
High voltage in release circuit, safety when making down circuitry.AC220V Alternating Current Power Supply one tunnel now is through diode D2 rectification, R5
Resistance is depressured current limliting, provides operating voltage to LED drive chip U1 (HV9910) chip VIN pin, because D2 is that halfwave rectifier needs
At U1 chip vdd terminal, meet a sufficiently large energy storage capacitor C3 over the ground, be U1 chip stable power-supplying.Another road is whole through D1 full-bridge
Stream, the LC filtering forming through L1 inductance, C2 electric capacity, driving for LED string provides power supply.Positive source passes through LED string, concatenation
L2, L3, L4 accumulation of energy inductance connection is in the drain electrode of external power field effect pipe Q1, then is connected to power supply through sustained diode 4
Positive pole, forms an afterflow loop.The external R6 resistance of U1 chip RT pin, is that LED string constant current drives PWM frequency to set.Logical
Cross U1 chip GATE pin output current controling signal, drive outside Q1 FET IRF840S grid.R8, R9, R10 tri-is electric
Resistance parallel connection be serially connected between Q1 FET source electrode and power cathode, R8, R9, R10 tri-resistance be LED string current sampling electricity
Resistance, through the sampling filtering of C4 capacitance current, enters the LED string current sample CS input of U1 chip, with LED after R7 resistance current limliting
Lamp string, external FET, U1 chip GATE output signal form constant current close loop control circuit.DZ1 is Q1 fet gate
Protection voltage-stabiliser tube, C5, C6 are LED load filter capacitor.
Important technological parameters:
Power supply inputs: AC75V~260V 50-60Hz
Drive electric current: 320mA
Power output: 10W
Ripple voltage: < 100mV
Operating ambient temperature :-10~70 DEG C.
Of the present utility model general principle and principal character and of the present utility model advantage have more than been shown and described.One's own profession
Skilled person will appreciate that of industry, the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Principle of the present utility model is simply described, on the premise of without departing from the utility model spirit and scope, the utility model is also
Have various changes and modifications, in the range of these changes and improvements both fall within claimed the utility model.The utility model
Claimed scope is defined by appending claims and equivalent thereof.