CN206743605U - A kind of LED colour temperature adjusts circui under FET shunting action - Google Patents
A kind of LED colour temperature adjusts circui under FET shunting action Download PDFInfo
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- CN206743605U CN206743605U CN201720519359.9U CN201720519359U CN206743605U CN 206743605 U CN206743605 U CN 206743605U CN 201720519359 U CN201720519359 U CN 201720519359U CN 206743605 U CN206743605 U CN 206743605U
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 36
- 230000002459 sustained effect Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000005669 field effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
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Abstract
The utility model discloses the LED colour temperature adjusts circui under a kind of FET shunting action, overcome in the prior art, in high-power LED driving power source, the problem of colour temperature is overlapped regulation by multichannel driving power.The utility model contains electricity-fetching module, luminance adjustment module, LED power supply module, electric energy is supplied luminance adjustment module by electricity-fetching module by wire, regulation controls the size by LED power supply module electric current by the electric current of luminance adjustment module, and the luminance adjustment module contains pwm chip power supply module, current regulating module, pwm chip.The technology can single channel drive in the case of, while it is continual continuously adjust two groups of LED bulbs, make colour temperature from the minimum of single group to the peak of single group.Than saving half volume with two-way driving.This technology replaces powerful adjustable resistance to complete this function using FET.
Description
Technical field
The utility model is related to a kind of high-power LED driving power source, more particularly under a kind of FET shunting action
LED colour temperature adjusts circui.
Background technology
In the prior art, the method for in the market specialty video display LED regulation colour temperature is：There is the LED bulb of several colour temperatures, just
There are corresponding independent a few road power drives, that is to say, that each colour temperature needs a single power supply, and this power supply can be with
It is single, also has plenty of and several individually power supplys are made in one piece, then centralized Control；Single power supply is in regulation colour temperature
During, the electric power outputting current of corresponding colour temperature is adjusted to change the brightness of this colour temperature bulb, to realize various colour temperatures
Regulation.Such as two kinds of colour temperatures, two-way driving power is just done, per a kind of colour temperature of power supply all the way, regulation is defeated per power supply all the way
Go out electric current, change the brightness of high and low colour temperature LED lamp bead, the bulb of two kinds of colour temperatures is mixed, reaches and continuously may be used from high to low
The colour temperature effect of change；With the mode of this regulation colour temperature, two-way driving power is at least done, if every will reach very all the way
High power, such as 300 watts, very big space will be like this taken, and can also be multiplied in material cost.Also
Supporting regulative mode, ineffective PWM regulations still all can make spatial volume continue to increase with potentiometer regulation, very not convenient
Take, cost can also increase.
Utility model content
The utility model is overcome in the prior art, and in high-power LED driving power source, colour temperature is carried out by multichannel driving power
A kind of the problem of superposition regulation, there is provided the LED colour temperature regulation electricity under FET shunting action simple in construction, easy to use
Road.
Technical solution of the present utility model is to provide under a kind of FET shunting action with following structure
LED colour temperature adjusts circui：Containing electricity-fetching module, luminance adjustment module, LED power supply module, electricity-fetching module will by wire
Electric energy supplies luminance adjustment module, adjusts by the electric current of luminance adjustment module to control by LED power supply module electric current
Size, the luminance adjustment module contain pwm chip power supply module, current regulating module, pwm chip, wherein PWM
Control chip power supply module contains resistance R1, voltage-regulator diode Z1, wherein resistance R1 one end connection electricity-fetching module positive pole, resistance
The R1 other ends are connected in series voltage-regulator diode Z1 positive pole, the negative pole of voltage-regulator diode Z1 negative pole connection electricity-fetching module；Electric current
Adjustment module contains FET Q1, FET Q2 and adjustable potentiometer RW1, FET Q1 D poles series connection afterflow two pole
After pipe D1 positive pole, the positive pole of the negative pole connection electricity-fetching module of sustained diode 1, FET Q1 S poles connection FET
Q2 D poles, FET Q2 S poles connect the negative pole of electricity-fetching module by wire, and adjustable potentiometer RW1 two stationary contacts are simultaneously
Voltage-regulator diode Z1 both ends are associated in, movable contact is connected to FET Q2 G poles by wire；The power supply of pwm chip
Pin VCC connects voltage-regulator diode Z1 positive pole by wire, and driving pin DRV connects FET Q1 G poles by wire,
The S poles that pin CS connects FET Q1 by wire are sampled, are connected again after set of frequency pin BOS series connection FREQUENCY CONTROL electric capacity C5
The negative pole of electricity-fetching module is connect, standby pin VS and ground pin GND are all connected with the negative pole of electricity-fetching module；The LED power supply mould
Block contains the lead-out terminal J2 and J3 of connection LED component, colour temperature adjusts FET Q23 and Q24, colour temperature adjusts FET
Driving divider resistance R2 and R3, duplex resistor RW2 and filter capacitor C3, filter capacitor C3 positive pole are connected in parallel on fly-wheel diode
The positive pole of electricity-fetching module is accessed on D1 negative pole, filter capacitor C3 negative pole is connected in parallel on the positive pole of sustained diode 1, wherein
Lead-out terminal J2 and J3 a terminal are both connected to filter capacitor C3 positive pole, lead-out terminal J2 and J3 another terminal point
Colour temperature regulation FET Q23 and Q24 D poles are not connected to by wire, colour temperature regulation FET Q23 and Q24 S are extremely equal
Connect filter capacitor C3 negative pole by wire, the driving divider resistance R2 of colour temperature regulation FET, duplex resistor RW2
After two static contacts and driving divider resistance R3 are sequentially connected in series, filter capacitor C3 both ends are connected in parallel on, duplex resistor RW2's is dynamic
Contact connects colour temperature regulation FET Q23 and Q24 G poles by wire respectively.
The electricity-fetching module is exchange electricity-fetching module, wherein exchange electricity-fetching module contains exchange power taking interface J1, temperature-sensitive electricity
Hinder RT1, fuse F1, filter inductance L1, filter capacitor C1, rectifier bridge BD1 and DC filter capacitor C2, exchange power taking interface J1
It is sequentially connected in series thermistor RT1, fuse F1, filter inductance L1 primary coil and forms loop, filter inductance L1 secondary wire
Loop is formed after the series connection of circle and rectifier bridge BD1 ac input end, wherein filter capacitor C1 is connected in parallel on filter inductance L1 exchange
Input, DC filter capacitor C2 are connected in parallel on rectifier bridge BD1 DC output end.
The both ends of the voltage-regulator diode Z1 are parallel with pwm chip filter capacitor C4, wherein C4 positive pole and Z1
Positive pole is connected.
The filter capacitor C3 polarities are connected in parallel on the both positive and negative polarity of LED power supply module.
Compared with prior art, the LED colour temperature adjusts circui under the utility model FET shunting action have with
Lower advantage：The existing colour temperature regulative mode of in the market is：One kind is using two-way identical circuit while drives two paths of LED lamp,
Regulation driving LED electric current realizes that the volume and quantity of so whole power supply will increase is twice；One kind is adjusted with potentiometer
The driving current of single channel is saved, so selected potentiometer power can be very big, while volume is big and price can be very high.
The advantages of this patent, is：LED colour temperature is adjusted by this patent method, can be in the case where single channel drives, together
When it is continual continuously adjust two groups of LED bulbs, make colour temperature from the minimum of single group to the peak of single group.So ratio two-way
Drive and save half volume, material, meanwhile, adjusted without high-power potential device；Both space has been saved, also very economical,
Reliably.This patent replaces powerful adjustable resistance to complete this function using FET.
Brief description of the drawings
Fig. 1 is the structural representation of the LED colour temperature adjusts circui under the utility model FET shunting action.
Embodiment
The LED colour temperature under the utility model FET shunting action is adjusted with reference to the accompanying drawings and detailed description
Economize on electricity road is described further：MP4000 recommend dimming mode be：MP4000 can be adjusted using the pwm signal of outside conversion
It is whole, LED brightness can also be adjusted with the DC voltage of a change.The pwm signal that recommendation is 200Hz ~ 2MH with frequency connects
It is connected on MP4000 PWM pins and realizes, the resistance that a 300K is met on 4000 BOS pins is connected on GND, sets one
1.2 volts of PWM reference voltage signals, PWM high level chip operations, low level chip are closed.
In DC voltage adjustment modes, a control source from 0-2.4V to DIM pin, more than 2.4 volts of poles 100% is bright,
120 millivolts bright to be issued to 5%, sets pulse frequency not dim if being connected to BOS pins and GND pin with an electric capacity, hangs
Empty DIM pin are simultaneously connected to BOS pin on GND.
What this patent provided is the sampled voltage by adjusting MP4000, that is, adjusts sampling resistor to adjust illumination.Figure
Middle Q2 is the sampling resistor of replacement；After high current leads to Q2, there is pressure drop U on Q2, the CS of this Voltage Feedback to MP4000 is drawn
Pin, MP4000 change the brightness of the current control lamp of output by detecting this voltage.
As shown in figure 1, contain electricity-fetching module, luminance adjustment module, LED power supply module, electricity-fetching module in the present embodiment
Electric energy is supplied by luminance adjustment module by wire, adjusts and is powered by the electric current of luminance adjustment module to control by LED
The size of blocks current, the luminance adjustment module contain pwm chip power supply module, current regulating module, PWM control cores
Piece, wherein pwm chip power supply module contain resistance R1, voltage-regulator diode Z1, wherein resistance R1 one end connection electricity-fetching module
Positive pole, the resistance R1 other ends be connected in series voltage-regulator diode Z1 positive pole, voltage-regulator diode Z1 negative pole connection electricity-fetching module
Negative pole；Current regulating module contains FET Q1, FET Q2 and adjustable potentiometer RW1, FET Q1 D poles string
After the positive pole for joining sustained diode 1, the positive pole of the negative pole connection electricity-fetching module of sustained diode 1, FET Q1 S poles connect
Connecing FET Q2 D poles, FET Q2 S poles connect the negative pole of electricity-fetching module by wire, and the two of adjustable potentiometer RW1
Individual stationary contact is connected in parallel on voltage-regulator diode Z1 both ends, and movable contact is connected to FET Q2 G poles by wire；PWM is controlled
The power pin VCC of chip connects voltage-regulator diode Z1 positive pole by wire, and driving pin DRV connects field-effect by wire
Pipe Q1 G poles, sampling pin CS connect FET Q1 S poles, set of frequency pin BOS series connection FREQUENCY CONTROL electricity by wire
The negative pole of electricity-fetching module is reconnected after appearance C5, standby pin VS and ground pin GND are all connected with the negative pole of electricity-fetching module；It is described
LED power supply module contains the lead-out terminal J2 and J3 of connection LED component, colour temperature regulation FET Q23 and Q24, colour temperature tune
The positive pole for saving driving the divider resistance R2 and R3 of FET, duplex resistor RW2 and filter capacitor C3, filter capacitor C3 is in parallel
The positive pole of electricity-fetching module is accessed on the negative pole of sustained diode 1, filter capacitor C3 negative pole is connected in parallel on sustained diode 1
On positive pole, a wherein lead-out terminal J2 and J3 terminal is both connected to filter capacitor C3 positive pole, lead-out terminal J2's and J3
Another terminal is connected to colour temperature regulation FET Q23 and Q24 D poles, colour temperature regulation FET Q23 by wire respectively
Filter capacitor C3 negative pole is extremely connected by wire with Q24 S, it is the driving divider resistance R2 of colour temperature regulation FET, double
After connection resistor RW2 two static contacts and driving divider resistance R3 are sequentially connected in series, filter capacitor C3 both ends, duplex are connected in parallel on
Resistor RW2 moving contact connects colour temperature regulation FET Q23 and Q24 G poles by wire respectively.
The electricity-fetching module is exchange electricity-fetching module, wherein exchange electricity-fetching module contains exchange power taking interface J1, temperature-sensitive electricity
Hinder RT1, fuse F1, filter inductance L1, filter capacitor C1, rectifier bridge BD1 and DC filter capacitor C2, exchange power taking interface J1
It is sequentially connected in series thermistor RT1, fuse F1, filter inductance L1 primary coil and forms loop, filter inductance L1 secondary wire
Loop is formed after the series connection of circle and rectifier bridge BD1 ac input end, wherein filter capacitor C1 is connected in parallel on filter inductance L1 exchange
Input, DC filter capacitor C2 are connected in parallel on rectifier bridge BD1 DC output end.
The both ends of the voltage-regulator diode Z1 are parallel with pwm chip filter capacitor C4, wherein C4 positive pole and Z1
Positive pole is connected.
After filter capacitor C3 and energy storage inductor the L2 series connection, it can prevent LED light group from starting the damage probability of moment,
It is connected in parallel on the positive pole of sustained diode 1 again, and wherein filter capacitor C3 polarities are connected in parallel on the positive and negative of LED power supply module
On extremely.
This patent drives two N-channel FET Q23, FET Q24 come real using a duplex potentiometer RW2
It is existing；Principle is：In alternating current circuit, a duplex potentiometer RW2 is added to determine two with two driving divider resistances R2 and R3
The driving voltage of individual FET, wherein FET Q23, FET Q24 driving voltage in 1V to 8V consecutive variations,
Equivalent resistance between DS can change at more than ten megaohms between tens milliohms.
Adjust duplex potentiometer RW2 to it is middle when, the tapped voltage of potentiometer can make FET fully on, this
Sample is the same by the electric current of two groups of LEDs；Adjust duplex potentiometer RW2 from centre when to one end when, a FET is complete
Conducting, a FET is completely switched off, is all the way maximum so by the electric current of two groups of LEDs, is all the way minimum；Regulation is double
Join potentiometer RW2 from centre when to the other end when, just in turn；It is equivalent between on FET Q23, FET Q24 DS
Resistance sizes also change therewith with the change of driving voltage, pressure drop, the electric currents of such two groups of LED bulbs also with change,
Can adjusts corresponding colour temperature and is continuously adjustabe.Realize on two output interfaces of duplex potentiometer RW2, output current
All the way from big to small, all the way from small to large, the colour temperature that LED is uninterruptedly adjusted with a conventional small-power potentiometer is reached.
Claims (4)
1. the LED colour temperature adjusts circui under a kind of FET shunting action, contains electricity-fetching module, luminance adjustment module, LED
Electric energy is supplied luminance adjustment module by lamp power supply module, electricity-fetching module by wire, adjusts the electric current by luminance adjustment module
To control the size by LED power supply module electric current, it is characterised in that：The luminance adjustment module contains pwm chip
Power supply module, current regulating module, pwm chip, wherein pwm chip power supply module contain resistance R1, the pole of voltage stabilizing two
Positive pole, the resistance R1 other ends of pipe Z1, wherein resistance R1 one end connection electricity-fetching module are connected in series voltage-regulator diode Z1 positive pole,
The negative pole of voltage-regulator diode Z1 negative pole connection electricity-fetching module；Current regulating module contain FET Q1, FET Q2, can
After the positive pole of tune potentiometer RW1 and energy storage inductor L2, FET Q1 D poles series connection sustained diode 1, sustained diode 1
Negative pole connection electricity-fetching module positive pole, be in series between FET Q1 D poles and the negative pole of LED power supply module energy storage electricity
Feel L2, FET Q1 S poles connection FET Q2 D poles, FET Q2 S poles connect electricity-fetching module by wire
Negative pole, adjustable potentiometer RW1 two stationary contacts are connected in parallel on voltage-regulator diode Z1 both ends, and movable contact is connected on the scene by wire
Effect pipe Q2 G poles；The power pin VCC of pwm chip connects voltage-regulator diode Z1 positive pole by wire, drives pin
DRV connects FET Q1 G poles by wire, and sampling pin CS connects FET Q1 S poles, set of frequency by wire
The negative pole of electricity-fetching module is reconnected after pin BOS series connection FREQUENCY CONTROL electric capacity C5, standby pin VS and ground pin GND are all connected with
The negative pole of electricity-fetching module；The LED power supply module contains the lead-out terminal J2 and J3 of connection LED component, colour temperature regulation field effect
Should pipe Q23 and Q24, colour temperature regulation driving the divider resistance R2 and R3 of FET, duplex resistor RW2 and filter capacitor C3,
Filter capacitor C3 positive pole is connected in parallel on the positive pole that electricity-fetching module is accessed on the negative pole of sustained diode 1, filter capacitor C3 negative pole
It is connected in parallel on the positive pole of sustained diode 1, wherein lead-out terminal J2 and J3 a terminal is being both connected to filter capacitor C3 just
Pole, lead-out terminal J2 and J3 another terminal are connected to colour temperature regulation FET Q23 and Q24 D poles by wire respectively,
Colour temperature regulation FET Q23 extremely connects filter capacitor C3 negative pole, colour temperature regulation FET with Q24 S by wire
Driving divider resistance R2, duplex resistor RW2 two static contacts and driving divider resistance R3 be sequentially connected in series after, be connected in parallel on filter
Ripple electric capacity C3 both ends, duplex resistor RW2 moving contact connect colour temperature regulation FET Q23 and Q24 by wire respectively
G poles.
2. the LED colour temperature adjusts circui under FET shunting action according to claim 1, it is characterised in that：Institute
Electricity-fetching module is stated as exchange electricity-fetching module, wherein exchange electricity-fetching module contains exchange power taking interface J1, thermistor RT1, fusing
Device F1, filter inductance L1, filter capacitor C1, rectifier bridge BD1 and DC filter capacitor C2, exchange power taking interface J1 are sequentially connected in series heat
Quick resistance RT1, fuse F1, filter inductance L1 primary coil form loop, filter inductance L1 secondary coil and rectifier bridge
Loop is formed after BD1 ac input end series connection, wherein filter capacitor C1 is connected in parallel on filter inductance L1 ac input end, direct current
Filter capacitor C2 is connected in parallel on rectifier bridge BD1 DC output end.
3. the LED colour temperature adjusts circui under FET shunting action according to claim 1, it is characterised in that：Institute
The both ends for stating voltage-regulator diode Z1 are parallel with pwm chip filter capacitor C4, and wherein C4 positive pole is connected with Z1 positive pole.
4. the LED colour temperature adjusts circui under FET shunting action according to claim 1, it is characterised in that：Institute
Filter capacitor C3 polarities are stated to be connected in parallel on the both positive and negative polarity of LED power supply module.
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| CN201720519359.9U CN206743605U (en) | 2017-05-11 | 2017-05-11 | A kind of LED colour temperature adjusts circui under FET shunting action |
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| CN201720519359.9U CN206743605U (en) | 2017-05-11 | 2017-05-11 | A kind of LED colour temperature adjusts circui under FET shunting action |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913525A (en) * | 2019-12-11 | 2020-03-24 | 国网北京市电力公司 | Double-bus adjustable color temperature lighting circuit |
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2017
- 2017-05-11 CN CN201720519359.9U patent/CN206743605U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913525A (en) * | 2019-12-11 | 2020-03-24 | 国网北京市电力公司 | Double-bus adjustable color temperature lighting circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 |