CN206575634U - A kind of dimming control switch LED constant current power supply - Google Patents
A kind of dimming control switch LED constant current power supply Download PDFInfo
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- CN206575634U CN206575634U CN201720178248.6U CN201720178248U CN206575634U CN 206575634 U CN206575634 U CN 206575634U CN 201720178248 U CN201720178248 U CN 201720178248U CN 206575634 U CN206575634 U CN 206575634U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model belongs to LED control circuit technical field, and in particular to a kind of to turn off LED dimming control switch LED constant current power supply by light modulation.A kind of dimming control switch LED constant current power supply, including：Electromagnetic compatibility module, lightning strike protection module, pulse-width modulation circuit, start-up circuit, on-off circuit, the first supply voltage module, the second supply voltage module, the first over-pressed overheat protector module, the second over-pressed overheat protector module, repid discharge module, power supply adjustment loop, main output filter module, fictitious load control module and 0 10V dimming controlling modules.The utility model increases a voltage detecting increase series of comparisons amplifier IC12 control optocoupler and paster triode at DC output end light modulation line, drags down optocoupler voltage, can turn off LED when dimmer voltage as little as certain limit.When needing to turn off LED every time, it is not necessary to the AC powered off, by directly dimming power cutoff, greatly terminal is facilitated to use.
Description
Technical field
The utility model belongs to LED control circuit technical field, and in particular to a kind of to turn off LED tune by light modulation
Photocontrol switchs LED constant current power supply.
Background technology
LED (light emitting diode) illuminations are gradually largely used to street lamp and outdoor scene illumination in the initial popularization stage, with
The raising for its cost performance and market-oriented level progresses into room lighting.LED is except light efficiency height, long lifespan and mercury-free environmental protection etc.
Beyond advantage, the characteristic of its wide scope continuously light-adjustable meets the demand of indoor energy-saving and scene illumination simultaneously.Dimming function
Realized by LED driving power supply, generally by pwm signal controlling switch transistor change to load light output current from
And change its operating power and brightness.The selectable signal transmission form of current LED indoor illumination light modulation be divided into be wirelessly transferred and
Wire transmission, wire transmission mode mainly uses wire to be transmitted.
LED can be driven by DC power-supply system, and white light LEDs have a positive unlatching operating voltage, and size is about
Significantly linear increase, therefore small forward direction electricity is presented with the increase of forward voltage in 3.2V, LED mean forward current
Pressure fluctuation will cause forward current by a relatively large margin to fluctuate.The white light LEDs ability when white light LEDs forward current is more than 100mA
Effectively light, the change of standard luminescent amount and forward current are almost linear.In numerous dimming arrangements, resistance current limliting
Method application scheme is simple and easy to apply, it is only necessary to which a current-limiting resistance can just control LED light intensity, but current-limiting resistance can be consumed greatly
The power of amount make it that the efficiency comparison of system is low, in addition resistance adjustment limited precision, and small control source change may result in
The change of white light LEDs brightness and the change of colour purity, thus this application scheme be suitable for low cost, to luminous efficiency and
The not high situation of effect requirements.Compared with resistance current limliting method, Linear Control method is greatly improved in precision.Its is basic
Principle be in circuit to LED in parallel or in series one work in linear zone power tube, adjusted by degeneration factor
The resistance size of power tube causes the electric current for flowing through LED to maintain a constant value.But it is due to that power tube is operated in linearly
Area, consumes more power, system it is inefficient.Charge pump booster circuit is also known as switching capacity boost pressure controller.It
Electric energy is sent to output end from input using discrete capacitor, whole circuit does not need any inductance, and design is simple.But
Because boosting gain is limited, twice of output voltage not over input voltage of most of charge pump booster circuit, institute
It is each to export branch in order to prevent that electric current distribution is uneven on parallel connection direct with usual by the way of in parallel when driving multiple LED
Lu Douxu connects into a current-limiting resistance, and the efficiency of such system is not high.Switching power circuit is by adjusting switching power tube
Make-to-break ratio can adjust the size of output voltage, the loss of power tube is reduced to 0V in theory.Use Buck topologys can be with
The output less than input supply voltage is realized, the output amplitude higher than input supply voltage can be realized using Boost.With electric charge
The theoretic boosting gains of Boost unlike pump circuit can be infinitely great, so can be used when connecting multiple LED modes
Series system, it is ensured that each LED luminosity is identical, and current-limiting resistance also only needs to one, effectively raises
The efficiency of whole system, it may be said that be efficiency highest in all drive circuits.But, the 0-10V that possesses on the market is adjusted at present
The power supply of light device, only exists the regulation of control LED brightness, but can not turn off LED by light modulation.
Utility model content
The purpose of this utility model is that offer is a kind of can turn off LED dimming control switch LED constant current by light modulation
Power supply.
What the purpose of this utility model was realized in：
A kind of dimming control switch LED constant current power supply, including：Electromagnetic compatibility module 1, lightning strike protection module 2, pulsewidth modulation
Circuit 3, start-up circuit 4, the supply supply of voltage module 6, second the 7, the first over-pressed excess temperature of voltage module of on-off circuit 5, first are protected
Protect the over-pressed overheat protector module 9 of module 8, second, repid discharge module 10, power supply adjustment loop 11, main output filter module 12,
Fictitious load control module 13 and 0-10V dimming controlling modules 14, power of alterating and direct current will be suppressed by described electromagnetic compatibility module
Electric current after electromagnetic interference is delivered to after pulse-width modulation circuit is modulated and sends start-up circuit and on-off circuit to；Start-up circuit and
After on-off circuit is opened and closed, electric current passes through the first supply voltage module and the second supply voltage module partial pressure, partial pressure respectively
Electric current afterwards is adjusted by 0-10V dimming controlling modules is supplied to main output filter module to filter and by after filtering after size of current
Electric current be sent to output end and be supplied to LED element；The first described supply voltage module is powered to pulse-width modulation circuit, and second
Supply voltage module adjusts loop, 0-10V dimming controlling modules to power supply and powered；Wherein power supply adjustment loop is opened for brightness adjustment control
Close LED constant current power supply and control loop is provided.
Described 0-10V dimming controlling modules include：First paster MINISO-8 operational amplifiers IC12A and the second paster
MINISO-8 operational amplifiers IC12：B, the ends in the same direction of the first paster MINISO-8 operational amplifiers by divider resistance R217 with
Input voltage positive pole P6 connections, the backward end of the first paster MINISO-8 operational amplifiers is pasted by two component piezoresistances and second
Piece MINISO-8 operational amplifiers IC12：B end in the same direction connection, the positive power source terminal of the first paster MINISO-8 operational amplifiers and
Negative power end is connected to form loop with the second over-pressed overheat protector module respectively, the first paster MINISO-8 operational amplifiers it is defeated
Go out end connection SOT323 paster triodes Q36 base stage, the colelctor electrode of SOT323 paster triodes passes through two voltage stabilizings two respectively
Pole pipe is connected with the end in the same direction of the first paster MINISO-8 operational amplifiers and the photoelectrical coupler IC2 of pulse-width modulation circuit,
The transmitting collection of SOT323 paster triodes is connected with the negative power end of the first paster MINISO-8 operational amplifiers, the second paster
MINISO-8 operational amplifiers IC12：The input of B output end and end in the same direction respectively with main output filter module is connected, and second
Paster MINISO-8 operational amplifiers IC12：B backward end and in the same direction end are connected shape with the second over-pressed overheat protector module respectively
Into loop.
Described main output filter circuit includes：In input, three polar capacitor C55, C56 in parallel in the same direction, C60's
Negative pole and three the resistance R27, R27A, R44 and the 7th diode D7 negative electrode that are connected in parallel are connected；The sun of 7th diode
Pole link enhancement type P ditch MOS field-effect transistors Q35 source electrode, the drain electrode connection of enhanced P ditches MOS field-effect transistors is touched
Point L3A, grid connects the output end of the second paster MINISO-8 operational amplifiers；61st polar capacitor C61 positive poles and
Three Same Name of Ends two-winding transformer L3 the first Same Name of Ends connection, negative pole and second with the 3rd Same Name of Ends two-winding transformer L3
Same Name of Ends connect, two output ends of the 3rd Same Name of Ends two-winding transformer i.e., the output end of main output filter circuit, second is same
The corresponding output head grounding in name end, the source electrode of enhanced P ditches MOS field-effect transistors passes through divider resistance and field-discharge resistance and the
The output end connection of two supply voltage modules.
WHT DC sources P2 connect respectively 1206 Chip-R R160 of described electromagnetic compatibility module one end and the 4th pair
Winding transformer L4 the first Same Name of Ends, the other end connection second of coil where the first Same Name of Ends of the 4th two-winding transformer
Two-winding transformer L2 the first Same Name of Ends, the other end of coil connects respectively where the first Same Name of Ends of the second two-winding transformer
Meet the one of the 3rd variable resistor RT3 and the first piezo-resistance MV1 of the 4th breaker W4, the 6th resistance R6 and lightning strike protection module
The other end of end, the 6th resistance and the 4th breaker connects the second electric capacity C2 jointly, and the other end of the second electric capacity connects second pair
The other end of coil where second Same Name of Ends of winding transformer, the second Same Name of Ends of the second two-winding transformer connects the 4th pair
The other end of coil where second Same Name of Ends of winding transformer, the second Same Name of Ends of the 4th two-winding transformer connects electricity respectively
The other end and BLK AC powers P1 of 1206 Chip-Rs of magnetic compatible modules.
The 3rd variable resistor RT3 and the first piezo-resistance MV1 of described lightning strike protection the module other end are connected respectively
Two inputs of Transient Suppression Diode a, output end of Transient Suppression Diode connects lightning strike protection module respectively
1206 Chip-R R186 and start-up circuit 1206 Chip-R R127,1206 Chip-Rs of lightning strike protection module it is another
End connects the 10th operational amplifier IC10 end in the same direction, two 0603 Chip-R R187, R188 and the 92nd electric capacity C92 respectively,
0603 Chip-R R188 and the 92nd electric capacity the C92 other end connect the positive power source terminal of the 10th operational amplifier, respectively
48SOD323 diodes D48 negative pole and the colelctor electrode of 32SOT23 triodes.
Described fictitious load control module is connected with main output filter module and 0-10V dimming controlling modules respectively, is electricity
Source test provides fictitious load.
Described repid discharge module is connected between main output filter module and the second supply voltage module, protects power supply
Circuit safety after power down.
The beneficial effects of the utility model are：Lamp switch is not arranged on a place, this practicality generally with light modulator
It is new to increase a voltage detecting increase series of comparisons amplifier IC12 control optocoupler and paster at DC output end light modulation line
Triode, drags down optocoupler voltage, can turn off LED when dimmer voltage as little as certain limit.When needing to turn off LED, it is not necessary to
The AC powered off every time, by directly dimming power cutoff, greatly facilitates terminal to use.
Brief description of the drawings
Fig. 1 is the utility model overall construction drawing.
Fig. 2 is the utility model 0-10V dimming controlling module circuit diagrams.
Fig. 3 is the main output filter circuit figure of the utility model.
Fig. 4 is electromagnetic compatibility module circuit diagram.
Fig. 5 is lightning protection circuit figure.
Fig. 6 is on-off circuit figure.
Fig. 7 is start-up circuit.
Fig. 8 is pulse-width modulation circuit.
Fig. 9 is the first over-pressed overheat protector module.
Figure 10 is current regulation loops.
Figure 11 is the second supply potential circuit.
Figure 12 is quick discharging circuit.
Figure 13 is that fictitious load controls circuit.
Figure 14 is the second over-pressed overheat protector module.
Figure 15 is the first supply potential circuit.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
As Figure 1-3, a kind of dimming control switch LED constant current power supply, including：Electromagnetic compatibility module 1, lightning strike protection mould
Block 2, pulse-width modulation circuit 3, start-up circuit 4, the supply supply of voltage module 6, second of on-off circuit 5, first voltage module 7, the
The one over-pressed over-pressed overheat protector module 9 of overheat protector module 8, second, repid discharge module 10, power supply adjustment loop 11, master are defeated
Go out filtration module 12, fictitious load control module 13 and 0-10V dimming controlling modules 14, power of alterating and direct current is simultaneous by described electromagnetism
Molar block, which delivers to the electric current after suppression electromagnetic interference, sends start-up circuit and switch electricity to after pulse-width modulation circuit is modulated
Road；After start-up circuit and on-off circuit are opened and closed, electric current passes through the first supply voltage module and the second supply voltage respectively
Electric current after module partial pressure, partial pressure is supplied to main output filter module after adjusting size of current by 0-10V dimming controlling modules
Filter and filtered electric current is sent to output end and be supplied to LED element；The first described supply voltage module is adjusted to pulsewidth
Circuit processed is powered, and the second supply voltage module adjusts loop, 0-10V dimming controlling modules to power supply and powered；Wherein power supply is adjusted
Loop provides control loop for dimming control switch LED constant current power supply.Input voltage is simultaneous by input electromagnetism in its course of work
After capacitive circuit, into pulse-width modulation circuit, to improve power factor and reduce harmonic content, then through becoming rectification circuit high voltage
Low-voltage is converted into, LED/light source is entered after mu balanced circuit, mu balanced circuit is that dimming controlling module circuit is powered, and power supply is adjusted
Whole circuit feedback voltage and current signal is to pulse-width modulation circuit, and to keep the voltage that power supply is exported, electric current is constant.
Described 0-10V dimming controlling modules include：First paster MINISO-8 operational amplifiers IC12A and the second paster
MINISO-8 operational amplifiers IC12：B, the ends in the same direction of the first paster MINISO-8 operational amplifiers by divider resistance R217 with
Input voltage positive pole P6 connections, the backward end of the first paster MINISO-8 operational amplifiers is pasted by two component piezoresistances and second
Piece MINISO-8 operational amplifiers IC12：B end in the same direction connection, the positive power source terminal of the first paster MINISO-8 operational amplifiers and
Negative power end is connected to form loop with the second over-pressed overheat protector module respectively, the first paster MINISO-8 operational amplifiers it is defeated
Go out end connection SOT323 paster triodes Q36 base stage, the colelctor electrode of SOT323 paster triodes passes through two voltage stabilizings two respectively
Pole pipe is connected with the end in the same direction of the first paster MINISO-8 operational amplifiers and the photoelectrical coupler IC2 of pulse-width modulation circuit,
The transmitting collection of SOT323 paster triodes is connected with the negative power end of the first paster MINISO-8 operational amplifiers, the second paster
MINISO-8 operational amplifiers IC12：The input of B output end and end in the same direction respectively with main output filter module is connected, and second
Paster MINISO-8 operational amplifiers IC12：B backward end and in the same direction end are connected shape with the second over-pressed overheat protector module respectively
Into loop.Said structure in LED switch power supply using the multi-mode for including dimming controlling module and Voltage stabilizing module by being dimmed
Circuit, the dim signal that control that can be adaptively to LED switch power supply is exported carries out partial pressure and decompression processing, and accordingly
Ground output resistance dimming control signal, voltage ladder dimming control signal or PWM dimming control signals, and then enter corresponding tune
Light mode of operation simultaneously controls to drive other modules to export corresponding drive signal so that LED drive circuit is according to corresponding light modulation work
Operation mode driving LED load work, can turn off LED when dimmer voltage as little as certain limit.
As shown in Fig. 4-Figure 15, because the utility model is redesigned only on the basis of original known circuit have modified tune
Optical circuit, therefore other circuit structures are not repeated herein, other modules are all the circuits of comparative maturity known in the art
Module, as long as the function of these known modules can be reached, can do appropriate replacement.
Described main output filter circuit includes：In input, three polar capacitor C55, C56 in parallel in the same direction, C60's
Negative pole and three the resistance R27, R27A, R44 and the 7th diode D7 negative electrode that are connected in parallel are connected；The sun of 7th diode
Pole link enhancement type P ditch MOS field-effect transistors Q35 source electrode, the drain electrode connection of enhanced P ditches MOS field-effect transistors is touched
Point L3A, grid connects the output end of the second paster MINISO-8 operational amplifiers；61st polar capacitor C61 positive poles and
Three Same Name of Ends two-winding transformer L3 the first Same Name of Ends connection, negative pole and second with the 3rd Same Name of Ends two-winding transformer L3
Same Name of Ends connect, two output ends of the 3rd Same Name of Ends two-winding transformer i.e., the output end of main output filter circuit, second is same
The corresponding output head grounding in name end, the source electrode of enhanced P ditches MOS field-effect transistors passes through divider resistance and field-discharge resistance and the
The output end connection of two supply voltage modules.
As shown in figure 3, WHT DC sources P2 connects the one of 1206 Chip-R R160 of described electromagnetic compatibility module respectively
End and the 4th two-winding transformer L4 the first Same Name of Ends, coil is another where the first Same Name of Ends of the 4th two-winding transformer
The second two-winding transformer L2 of end connection the first Same Name of Ends, coil is another where the first Same Name of Ends of the second two-winding transformer
It is pressure-sensitive that one end connects the 4th breaker W4, the 6th resistance R6 and the 3rd variable resistor RT3 of lightning strike protection module and first respectively
The other end of resistance MV1 one end, the 6th resistance and the 4th breaker connects the second electric capacity C2, the other end of the second electric capacity jointly
The other end of coil, the second Same Name of Ends of the second two-winding transformer where connecting the second Same Name of Ends of the second two-winding transformer
The other end of coil, the second Same Name of Ends of the 4th two-winding transformer where connecting the second Same Name of Ends of the 4th two-winding transformer
The other end and BLK AC powers P1 of 1206 Chip-Rs of electromagnetic compatibility module are connected respectively.
As shown in figure 4, the 3rd variable resistor RT3's and the first piezo-resistance MV1 of described lightning strike protection module is another
End connects two inputs of Transient Suppression Diode respectively, and an output end of Transient Suppression Diode connects thunderbolt and protected respectively
Protect 1206 Chip-R R186 of module and 1206 Chip-R R127 of start-up circuit, the 1206 pasters electricity of lightning strike protection module
The other end of resistance connects the 10th operational amplifier IC10 end in the same direction, two 0603 Chip-R R187, R188 and the 92nd respectively
Electric capacity C92,0603 Chip-R R188 and the 92nd electric capacity the C92 other end connect the positive supply of the 10th operational amplifier respectively
The colelctor electrode at end, 48SOD323 diodes D48 negative pole and 32SOT23 triodes.
Power circuit of the present utility model uses pulse width modulation, and its switching frequency is definite value, is led by regulation
The width of punching of promoting blood circulation changes dutycycle, thus realize to control from energy to load transmission.The modulation system is on-off circuit
In be commonly used form, be compared by the ripple inside the feedback of feedback circuit and the difference of benchmark and circuit, it is then defeated
Go out the square-wave signal that constant frequency all the way broadens to be controlled power switch pipe, during conducting according to load quick regulation switching tube
Between, so that regulated output voltage.PWM mode voltage regulation factor is high, and the linearity is high, and output ripple is small, it is adaptable to voltage and
Current control mode.
Bias current is zero when electric on the tandem circuit of this practicality, and all branch roads continue to zero current, this meeting
Indefinite duration maintained switch is caused to be closed, it is impossible to obtain output voltage.Therefore, need to break away from the stable state that zero current is biased for this
Starting problem.The basic ideas for solving starting problem are just to provide and avoid reference circuit from maintaining zero offset electric current when upper electric
Hole in the ground circuit, realizes following function：Reference circuit is given to provide a path from power supply to ground when upper electric, so that biasing
Electric current is not zero, and after reference circuit formation bias current, start-up circuit will not have any impact to bias current again.
After upper electricity, the electric current flowed through on resistance is zero, therefore the grid and source electrode of FET are ground potential, the conducting of front end FET
Afterwards, rear end FET is then turned on, and conducting causes switched field effect pipe grid voltage to be turned on after dragging down, and then reference circuit is broken away from
Zero current stable state, has bias current in each branch road.Now transistor is also switched on, and has reached the effect of cut-in voltage.
While concrete function is realized, in order that chip works no more than its nominal parameter, to ensure its reliability, keep away
Exempt to damage because of overheat, additional certain protection circuit is needed in circuit.In general, protection circuit has two kinds of forms：It is a kind of
It is overcurrent protection, it is, when the peak point current for flowing through switching tube exceedes its load current value, to try the peak value of limit switch pipe
Electric current, it is ensured that the average current of switching tube makes switching tube not burnt out because of excessively stream not over its rated value；It is another just
It is overtemperature protection, a thermally sensitive linear unit is designed in circuit, this usual device is arranged at the week of switching tube
Enclose, to the temperature of detection switch pipe, when switching tube is because power consumption is excessive and temperature is increased and exceedes operating temperature ratings model
When enclosing, temperature measuring device will starting protection circuit decline the operating current of switching tube, which limits the power consumption of switching tube, from
And temperature is gradually reduced, when less than some value of operating temperature ratings, protection circuit failure, circuit recovers again
Normal working condition.Usual temperature measuring device abuts switching tube in layout design, so can directly quick aware switch
The temperature of pipe because when switching tube is chip operation power consumption major sources, the size for limiting its power consumption just can be effective
Ensure whole chip operation in rated temperature range.
The effective measures of overcurrent protection are exactly current limliting.In LED driver during work, when output loading
Greatly, when partial short-circuit occurs for device inside element or external circuit, current foldback circuit can limit the electricity for flowing through switching tube
Stream, make its be controlled in it is specified within the scope of.Traditional protected mode is that the electric current of switching tube is flowed through in detection, typically by with
Switching tube one small resistor of series connection is detected using the gate source voltage of switching tube, by the pressure drop or the switch that detect resistance
The gate source voltage of pipe, then compared with reference voltage source, if pressure drop is higher than reference voltage source, the output voltage of comparator
Switching tube is closed, prevents electric current further up, it is ensured that electric current only overrate.
Prolonged periods work in close to carrying current in the case of when, internal power consumption is very big, and the temperature of chip can be anxious
Play rises.In addition, heat abstractor effect is not good, or environment temperature is higher, is all possible to cause the temperature of chip to rise to
The Limit temperature value of normal work.When the temperature of chip rises to predetermined limiting temperature, switching tube shut-off, the electric current of system
With power consumption vanishing, the chip of overheat starts cooling.When chip temperature falls below a certain temperature value of limiting temperature, open
Close pipe to turn on again, circuit recovers normal work.If cause above the too high situation of temperature be not changed, then
The temperature of chip can be once again drastically rise, ultimately result in the shut-off again of switching tube.Said process is persistently carried out, Zhi Daoxin
The working environment of piece is improved.In view of in actual application driver may operate in the boundary of Thermal shutdown, be
Avoid causing the comparator in frequently State Transferring, thermal-shutdown circuit from using hysteresis comparator.
The realization of overtemperature protection is completed by the temperature characterisitic of resistance.It is understood that the resistance of thermistor be with
The change of temperature and change, the resistance of resistance can also make with rise, because resistance connects with constant-current source when the temperature increases
The voltage at resistance two ends is obtained also in rise, when this voltage is higher than bandgap voltage reference, temperature detector comparator is acted from " 0 "
Become " 1 ", NOR-logic force switch pipe is closed.After temperature is reduced, the voltage at thermistor two ends also and then declines, and works as voltage
When being brought down below reference voltage value, temperature detector comparator output switching activity is exported from " 0 " change " 1 ", the dominant right of driving switch pipe is again
Grasped by pwm control logic, circuit starts to launch into normal working condition.
It is described above, only the utility model preferably embodiment, but protection domain of the present utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model is disclosed
Change should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with right
It is required that protection domain be defined.
Claims (5)
1. a kind of dimming control switch LED constant current power supply, including：Electromagnetic compatibility module (1), lightning strike protection module (2), pulsewidth are adjusted
Circuit (3) processed, start-up circuit (4), on-off circuit (5), the first supply voltage module (6), the second supply voltage module (7), the
One over-pressed overheat protector module (8), the second over-pressed overheat protector module (9), repid discharge module (10), power supply adjustment loop
(11), main output filter module (12), fictitious load control module (13) and 0-10V dimming controlling modules (14), it is characterised in that：
Electric current after suppression electromagnetic interference is delivered to pulse-width modulation circuit by described electromagnetic compatibility module and adjusted by power of alterating and direct current
Send start-up circuit and on-off circuit after system to；After start-up circuit and on-off circuit are opened and closed, electric current passes through first respectively
The electric current supplied after voltage module and the second supply voltage module partial pressure, partial pressure adjusts electric current by 0-10V dimming controlling modules
It is supplied to main output filter module to filter and filtered electric current is sent into output end after size and is supplied to LED element；It is described
First supply voltage module powered to pulse-width modulation circuit, second supply voltage module to power supply adjust loop, 0-10V dim
Control module is powered；Wherein power supply adjustment loop provides control loop for dimming control switch LED constant current power supply.
2. a kind of dimming control switch LED constant current power supply according to claim 1, it is characterised in that described 0-10V is adjusted
Photocontrol module includes：First paster MINISO-8 operational amplifiers (IC12A) and the second paster MINISO-8 operational amplifiers
(IC12：B), the end in the same direction of the first paster MINISO-8 operational amplifiers passes through divider resistance (R217) and input voltage positive pole
(P6) connect, the backward end of the first paster MINISO-8 operational amplifiers passes through two component piezoresistances and the second paster MINISO-8
Operational amplifier (IC12：B end in the same direction connection), the positive power source terminal and negative power end of the first paster MINISO-8 operational amplifiers
It is connected to form loop with the second over-pressed overheat protector module respectively, the output end connection of the first paster MINISO-8 operational amplifiers
The base stage of SOT323 pasters triode (Q36), the colelctor electrodes of SOT323 paster triodes respectively by two voltage-regulator diodes with
The end in the same direction of first paster MINISO-8 operational amplifiers and photoelectrical coupler (IC2) connection of pulse-width modulation circuit, SOT323
The transmitting collection of paster triode is connected with the negative power end of the first paster MINISO-8 operational amplifiers, the second paster MINISO-8
Operational amplifier (IC12：B the input of output end and end in the same direction respectively with main output filter module) is connected, the second paster
MINISO-8 operational amplifiers (IC12：B backward end and end in the same direction) is connected to be formed with the second over-pressed overheat protector module respectively
Loop.
3. a kind of dimming control switch LED constant current power supply according to claim 1, it is characterised in that：Described main output
Filter circuit includes：In input, three the negative pole of polar capacitor (C55, C56, C60) in parallel and are connected in parallel in the same direction
The negative electrode connection of three resistance (R27, R27A, R44) and the 7th diode (D7)；The anode link enhancement type P of 7th diode
The source electrode of ditch MOS field-effect transistors (Q35), the drain electrode connecting terminal (L3A) of enhanced P ditches MOS field-effect transistors, grid
Connect the output end of the second paster MINISO-8 operational amplifiers；61st polar capacitor (C61) positive pole and the 3rd Same Name of Ends
Second Same Name of Ends of the first Same Name of Ends connection of two-winding transformer (L3), negative pole and the 3rd Same Name of Ends two-winding transformer (L3)
Connection, two output ends of the 3rd Same Name of Ends two-winding transformer i.e., the output end of main output filter circuit, the second Same Name of Ends pair
The output head grounding answered, the source electrode of enhanced P ditches MOS field-effect transistors is supplied by divider resistance and field-discharge resistance and second
The output end connection of voltage module.
4. a kind of dimming control switch LED constant current power supply according to claim 1, it is characterised in that：WHT DC sources (P2)
One end and the 4th two-winding transformer (L4) of 1206 Chip-Rs (R160) of described electromagnetic compatibility module are connected respectively
First Same Name of Ends, the other end of coil connects the second two-winding transformer where the first Same Name of Ends of the 4th two-winding transformer
(L2) the first Same Name of Ends, the other end of coil where the first Same Name of Ends of the second two-winding transformer connects the 4th open circuit respectively
The one of device (W4), the 3rd variable resistor (RT3) of the 6th resistance (R6) and lightning strike protection module and the first piezo-resistance (MV1)
The other end of end, the 6th resistance and the 4th breaker connects the second electric capacity (C2), the other end connection second of the second electric capacity jointly
The other end of coil where second Same Name of Ends of two-winding transformer, the second Same Name of Ends connection the 4th of the second two-winding transformer
The other end of coil where second Same Name of Ends of two-winding transformer, the second Same Name of Ends of the 4th two-winding transformer is connected respectively
The other end and BLK AC powers (P1) of 1206 Chip-Rs of electromagnetic compatibility module.
5. a kind of dimming control switch LED constant current power supply according to claim 1, it is characterised in that：Described thunderbolt is protected
Protect the 3rd variable resistor (RT3) of module and the other end of the first piezo-resistance (MV1) connects Transient Suppression Diode respectively
Two inputs a, output end of Transient Suppression Diode connects 1206 Chip-Rs (R186) of lightning strike protection module respectively
With 1206 Chip-Rs (R127) of start-up circuit, the other end of 1206 Chip-Rs of lightning strike protection module connects the 10th respectively
The end in the same direction of operational amplifier (IC10), two 0603 Chip-Rs (R187, R188) and the 92nd electric capacity (C92), 0603 paster
The other end of resistance (R188) and the 92nd electric capacity (C92) connects positive power source terminal, the 48SOD323 of the 10th operational amplifier respectively
The negative pole of diode (D48) and the colelctor electrode of 32SOT23 triodes.
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| CN201720178248.6U CN206575634U (en) | 2017-02-27 | 2017-02-27 | A kind of dimming control switch LED constant current power supply |
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| CN201720178248.6U CN206575634U (en) | 2017-02-27 | 2017-02-27 | A kind of dimming control switch LED constant current power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
| CN109757010A (en) * | 2019-03-14 | 2019-05-14 | 深圳市健森实业有限公司 | Power circuit system drops in a kind of LED power timing drop power and excess temperature automatically |
| CN110113845A (en) * | 2019-06-06 | 2019-08-09 | 湖南凯上电子科技有限公司 | A kind of LED illumination power supply eyeshield SS (soft start) control circuit |
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2017
- 2017-02-27 CN CN201720178248.6U patent/CN206575634U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
| CN109296995B (en) * | 2018-11-02 | 2024-02-06 | 华域视觉科技(上海)有限公司 | LED lamp module and LED light source driving circuit |
| CN109757010A (en) * | 2019-03-14 | 2019-05-14 | 深圳市健森实业有限公司 | Power circuit system drops in a kind of LED power timing drop power and excess temperature automatically |
| CN110113845A (en) * | 2019-06-06 | 2019-08-09 | 湖南凯上电子科技有限公司 | A kind of LED illumination power supply eyeshield SS (soft start) control circuit |
| CN110113845B (en) * | 2019-06-06 | 2024-03-22 | 湖南凯上电子科技有限公司 | Eye protection soft start control circuit of LED illumination power supply |
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