CN206413223U - A kind of single I/O interface LED adjusting control circuits - Google Patents
A kind of single I/O interface LED adjusting control circuits Download PDFInfo
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- CN206413223U CN206413223U CN201621470394.8U CN201621470394U CN206413223U CN 206413223 U CN206413223 U CN 206413223U CN 201621470394 U CN201621470394 U CN 201621470394U CN 206413223 U CN206413223 U CN 206413223U
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Abstract
The utility model is related to a kind of single I/O interface LED adjusting control circuits.Including：Dim signal process circuit and breaking circuit, I/O interface connects the dim signal input of LED drive power by dim signal process circuit, AC L INPUT interfaces connect the mains electricity input end of LED drive power by breaking circuit, AC N INPUT interfaces connect the mains electricity input end of LED drive power, dim signal process circuit connection breaking circuit；Breaking circuit controls the break-make of LED drive power by gathering the dim signal that dim signal process circuit is exported, and the dim signal of dim signal process circuit output is less than preset value, then LED drive power disconnects；The dim signal of dim signal process circuit output is more than preset value, then LED drive power is connected.By implementing the utility model, it is only necessary to an I/O interface, and it is adjustable shut-off point by adjusting resistance values, simplifies production procedure, reduce cost.
Description
Technical field
The utility model is related to LED driving light modulations field, more specifically to a kind of single I/O interface LED brightness adjustment controls
Circuit.
Background technology
In LED illumination application field, some occasions are needed to use dimming function, and implementation method is carried by LED drive power
For a dim signal interface, an external light modulator is connected with the interface, and control signal is inputted on interface, is adjusted with this
The output current of LED drive power, to reach the purpose of regulation brightness of illumination.
Conventional general dim signal mode has 3 kinds：
1：Resistance light modulation (resistance adjustment scope 0-100K Ω) 0 Ω is minimum, maximum power output during 100K Ω；
2：PWM is dimmed, and is dimmed by the periodic signal of a variable duty ratio, such as Vp-p=10V, dutycycle 0%-
100%, minimum when 0%, maximum power output when 100%；
3：Analog voltage is dimmed, and usually one 0-10V analog voltage is input to dim signal end, and 0V is minimum, during 10V
Maximum power output.
Stepless dimming can be achieved in three of the above dimming mode, and dimming process brightness changes uniform naturally, not having pause and transition in rhythm or melody sense,
Euphorosia, there is now circuit can realize that three of the above dimming function is integrated, that is, share a dim signal port.
The utility model is exactly to use the third dimming mode, exports 0-10V voltage signal to driving power supply brightness adjustment control line
On, the output current of LED drive power is adjusted to dim.
In light modulation, conventional One function be light modulation brightness when reach very small, it is necessary to directly lamp is knocked out, with
Realize energy-conservation and the purpose of prolonging service lives of lamps.Existing light modulator is micro- via dimmer internal when this partial function is handled
2 I/O interfaces of processor control, export dim signal and cut-off signals respectively.When output dim signal is very weak (such as
Less than 1V), supplied by the electric main of programme-control another I/O interface control relay disconnection LED drive power, it is real
Now turn off the purpose of light source.
I/O-1 interfaces are used for the friendship that control relay turns off driving power supply in existing conventional solution below figure 1, Fig. 1
Flow supply input.
I/O-2 interfaces are exported the periodic signal of a variable duty ratio by microprocessor internal, because single-chip microcomputer can only be defeated
Go out the signal that Vp-p values are 5V, so an external operational amplifier is needed 2 times of signal amplification, it is defeated to meet standard 0-10V
The signal level standard entered, the dim signal terminal for LED drive power of being plugged into by the 0-10V signals of the output of amplifier.
In existing conventional turn-off technique scheme, there is following defect in design and application：
1：As described above, conventional solution needs to take 2 I/O interfaces, and microprocessor also needs to connect communication data
The peripheral hardware such as line and various environmental sensors, many times merely because a multi-purpose I/O interface, causes when design
Having to from the more microprocessors of pin, (such as the chip of 8 pins can not be met, then need to draw from the 14 of bigger encapsulation
The chip more than pin encapsulated, 6 pins having more only have used 1 again, remaining 5 it is hanging without, cause the waste of resource because
Chip routinely encapsulates the product without 10 pins or 12 pins), cause design volume huge, and improve product cost (often
The chip of 8 pin packages is advised than 14 pin chip prices cheap 1/3 or so, the product price of 6 pins is lower), in practical application
In lose the market competitiveness.
2：In routinely shut-off solution, (as being less than 1V) when output dim signal is very weak, pass through program control
The electric main supply that another I/O interface control relay disconnects LED drive power is made, the purpose of shut-off light source is realized.But
It is that many different clients can individually specify shut-off point (to be turned off during such as dim signal 0.8V, perhaps another client may require that 0.5V
Shut-off, or other any electrical voltage point shut-offs).In the product volume production stage, in order to further reduce product cost, typically it can all select
It is disposable solid in batches with the microprocessor (One Time Programmable or OTP type ROM) of one-off programming memory
Change program, the later stage can not change, and need the otherness of different shut-off points to require often helpless for different clients, because
The chip of disposable burning can not be changed again causes production chains very poor, it is necessary to remodify program again with brand-new chip
Burning, the different order of correspondence has the program code of a variety of different editions, causes workload to roll up and easily go out
Mistake, in a disguised form improves production cost.
Utility model content
The technical problems to be solved in the utility model is, for two I/O interfaces of above-mentioned needs of prior art, it is impossible to
There is provided a kind of single I/O interface LED adjusting control circuits for flexible modulation shut-off point defect.
The utility model solves the technical scheme that its technical problem used：Construct a kind of single I/O interface LED light modulations control
Circuit processed, including：Dim signal process circuit and breaking circuit,
I/O interface connects the dim signal input of LED drive power, AC-L- by the dim signal process circuit
INPUT interfaces connect the mains electricity input end of LED drive power by the breaking circuit, and the connection of AC-N-INPUT interfaces is described
The mains electricity input end of LED drive power, the dim signal process circuit connects the breaking circuit；
The breaking circuit controls LED drive power by gathering the dim signal that the dim signal process circuit is exported
Civil power break-make, the dim signal of dim signal process circuit output is less than preset value, then LED drive power disconnects；Institute
The dim signal for stating the output of dim signal process circuit is more than the preset value, then LED drive power is connected.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the breaking circuit includes：Compare
Device, the first bleeder circuit, the second bleeder circuit, on-off circuit, relay,
The output end of the dim signal process circuit connects the same phase of the comparator by second bleeder circuit
Input, the comparator connects the relay by the on-off circuit；First bleeder circuit connects the comparison
The inverting input of device；First bleeder circuit and on-off circuit connection the positive source VCC；
The dim signal of the dim signal process circuit output is less than preset value, the in-phase input end of the comparator
Incoming level is less than the incoming level of inverting input, and the on-off circuit controls the relay to disconnect；
The dim signal of the dim signal process circuit output is more than preset value, the in-phase input end of the comparator
Incoming level is higher than the incoming level of inverting input, and the on-off circuit controls the relay closure.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, first bleeder circuit includes：
Resistance R6 and resistance R7,
The inverting input of the comparator by the resistance R6 connection positive sources VCC, the comparator it is anti-phase
Input is grounded by the resistance R7, the reference voltage that positive source VCC is produced after the resistance R6 and resistance R7 partial pressures
Input the inverting input of the comparator.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, second bleeder circuit includes：
Resistance R4 and resistance R5,
The in-phase input end of the comparator passes through the resistance R4 connections dim signal process circuit, the comparison
The in-phase input end of device is grounded by the resistance R5, and the dim signal of the dim signal process circuit output is through the resistance
The in-phase input end of the comparator is inputted after R4 and resistance R5 partial pressures.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the resistance R4, resistance R5, resistance
R6, resistance R7 are adjustable resistance,
The intrinsic standoff ratio of first bleeder circuit is adjusted by adjusting the resistance R6 and resistance R7 resistance, by adjusting
The resistance R4 and resistance R5 resistance is saved to adjust the intrinsic standoff ratio of second bleeder circuit；By adjusting first partial pressure
The intrinsic standoff ratio of circuit and the second bleeder circuit adjusts the shut-off point of LED.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the on-off circuit includes：Three poles
Pipe Q2 and diode D1,
The base stage of the triode Q2 connects the output end of the comparator, the grounded emitter of the triode Q2, institute
The colelctor electrode for stating triode Q2 connects the positive pole of the diode D1, the negative pole connection positive source VCC of the diode D1.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the breaking circuit also includes：
Effect pipe Q1, resistance R8,
The grid of the FET Q1 connects the output end of the comparator, and the drain electrode of the FET Q1 passes through institute
State the inverting input of the resistance R8 connections comparator, the source ground of the FET Q1；
The dim signal of the dim signal process circuit output is more than preset value, the in-phase input end of the comparator
Incoming level is higher than the incoming level of inverting input, and the signal of the comparator output drives the FET Q1 conductings,
And then the level of the inverting input of the comparator is dragged down, produce voltage difference between the upset point for making the comparator.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the resistance R8 is adjustable resistance,
Signal difference between by adjusting the resistance regulation LED drive power disconnection of the resistance R8 and opening.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the dim signal process circuit bag
Include：Resistance R1, resistance R2, resistance R3, electric capacity C1, operational amplifier,
The in-phase input end of the operational amplifier passes through the resistance R1 connections I/O interface, the operational amplifier
In-phase input end be grounded by the electric capacity C1, the inverting input of the operational amplifier is grounded by the resistance R2,
The inverting input of the operational amplifier is put by the output end of the resistance R3 connections operational amplifier, the computing
The output end output dim signal of big device.
Preferably, single I/O interface LED adjusting control circuits described in the utility model, the resistance of the resistance R2 and resistance R3
Value is equal, and input signal is amplified 2 times by the operational amplifier.
Implement single I/O interface LED adjusting control circuits of the present utility model, have the advantages that：The circuit includes：
Dim signal process circuit and breaking circuit, I/O interface connect the tune of LED drive power by the dim signal process circuit
Optical signal input, AC-L-INPUT interfaces connect the mains electricity input end of LED drive power, AC-N- by the breaking circuit
INPUT interfaces connect the mains electricity input end of the LED drive power, the dim signal process circuit connection shut-off electricity
Road；The breaking circuit controls the logical of LED drive power by gathering the dim signal that the dim signal process circuit is exported
Disconnected, the dim signal of the dim signal process circuit output is less than preset value, then LED drive power disconnects；The light modulation letter
The dim signal of number process circuit output is more than the preset value, then LED drive power is connected.By implementing the utility model,
An I/O interface is only needed, and is adjustable shut-off point by adjusting resistance values, simplifies production procedure, reduces cost.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the structural representation of dim signal process circuit in the prior art；
Fig. 2-3 is the structural representation of the utility model list I/O interface LED adjusting control circuits；
Fig. 4 is the circuit diagram of the utility model list I/O interface LED adjusting control circuit preferred embodiments.
Embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, accompanying drawing is now compareed detailed
Illustrate this embodiment of the present utility model.
Fig. 2-3 is the structural representation of the utility model list I/O interface LED adjusting control circuits.
The utility model solves the technical scheme that its technical problem used：Construct a kind of single I/O interface LED light modulations control
Circuit processed, including：Dim signal process circuit and breaking circuit,
I/O interface connects the dim signal input of LED drive power, AC-L-INPUT by dim signal process circuit
Interface connects the mains electricity input end of LED drive power by breaking circuit, and AC-N-INPUT interfaces connect the city of LED drive power
Electrical input, dim signal process circuit connection breaking circuit；
Breaking circuit controls the civil power of LED drive power to lead to by gathering the dim signal that dim signal process circuit is exported
Disconnected, the dim signal of dim signal process circuit output is less than preset value, then LED drive power disconnects；Dim signal processing electricity
The dim signal of road output is more than preset value, then LED drive power is connected.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, breaking circuit includes：Comparator, first point
Volt circuit, the second bleeder circuit, on-off circuit, relay,
The output end of dim signal process circuit connects the in-phase input end of comparator, comparator by the second bleeder circuit
Relay is connected by on-off circuit；First bleeder circuit connects the inverting input of comparator；First bleeder circuit and switch
Circuit connection positive source VCC；
The dim signal of dim signal process circuit output is less than preset value, the incoming level of the in-phase input end of comparator
Less than the incoming level of inverting input, on-off circuit control relay disconnects, and cuts off the Alternating Current Power Supply of LED drive power, lamp
Tool thoroughly extinguishes.
The dim signal of dim signal process circuit output is more than preset value, the incoming level of the in-phase input end of comparator
Higher than the incoming level of inverting input, on-off circuit control relay closure connects the Alternating Current Power Supply of LED drive power, and
And output current is the output current control brightness set by dim signal.
Above-mentioned preset value is flexibly set according to product demand.
Fig. 4 is the circuit diagram of the utility model list I/O interface LED adjusting control circuit preferred embodiments.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, the first bleeder circuit includes：Resistance R6 and
Resistance R7,
The inverting input of comparator passes through electricity by resistance R6 connection positive source VCC, the inverting input of comparator
Hinder R7 ground connection, the anti-phase input for the reference voltage input comparator that positive source VCC is produced after resistance R6 and resistance R7 partial pressures
End.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, the second bleeder circuit includes：Resistance R4 and
Resistance R5,
The in-phase input end of comparator is led to by resistance R4 connection dim signal process circuits, the in-phase input end of comparator
Cross resistance R5 ground connection, the dim signal that dim signal process circuit is exported input comparator after resistance R4 and resistance R5 partial pressures
In-phase input end.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, resistance R4, resistance R5, resistance R6, resistance
R7 is adjustable resistance,
The intrinsic standoff ratio of the first bleeder circuit is adjusted by adjusting resistance R6 and resistance R7 resistance, by adjusting resistance R4
The intrinsic standoff ratio of the second bleeder circuit is adjusted with resistance R5 resistance；By adjusting the first bleeder circuit and the second bleeder circuit
Intrinsic standoff ratio adjusts the shut-off point of LED.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, on-off circuit includes：Triode Q2, two poles
Pipe D1, resistance R9,
Triode Q2 base stage passes through the output end of resistance R9 connection comparators, triode Q2 grounded emitter, three poles
Pipe Q2 colelctor electrode connection diode D1 positive pole, diode D1 negative pole connection positive source VCC.Diode D1 is connected in parallel
Relay.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, breaking circuit also includes：FET Q1,
Resistance R8,
FET Q1 grid connects the output end of comparator, and FET Q1 drain electrode is compared by resistance R8 connections
The inverting input of device, FET Q1 source ground；
The dim signal of dim signal process circuit output is more than preset value, the incoming level of the in-phase input end of comparator
Higher than the incoming level of inverting input, the signal driving FET Q1 conductings of comparator output, equivalent to resistance after conducting
R7 and resistance R8 is in parallel, and then drags down the level of the inverting input of comparator, and voltage is produced between the upset point for making comparator
Difference, so plays a hysteresis, and making two of U1B to overturn point has certain return difference, it is to avoid misoperation.Upset point is referred to
The change point of comparator state.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, resistance R8 is adjustable resistance, passes through regulation
Resistance R8 resistance regulation LED drive power disconnects and the signal difference between opening.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, dim signal process circuit includes：Resistance
R1, resistance R2, resistance R3, electric capacity C1, operational amplifier,
Resistance R1 and electric capacity C1 constitutes a RC filter circuit, for changing the effective of the pwm pulse ripple that I/O interface is exported
Value, such as Vp-p is 5V, and PWM duty cycle is converted to 0-5V analog voltage letter from 0%-100% after the RC filter circuits
Number, then export to the in-phase input end of operational amplifier.The multiplication factor of amplifier depends on resistance R2 and resistance R3 ratio
Value,
Operational amplifier is in-phase amplifier, and the in-phase input end of operational amplifier passes through resistance R1 connection I/O interfaces, fortune
The in-phase input end for calculating amplifier is grounded by electric capacity C1, and the inverting input of operational amplifier is grounded by resistance R2, computing
The inverting input of amplifier passes through the output end of resistance R3 concatenation operation amplifiers, the output end output light modulation of operational amplifier
Signal.
Preferably, single I/O interface LED adjusting control circuits of the present utility model, resistance R2 and resistance R3 resistance are equal,
Input signal is amplified 2 times by operational amplifier.For example, the 0-5V signals of operational amplifier input are converted to 0-10V after amplifying 2 times
Dim signal, the signal connects the dim signal terminal of LED drive power, for adjust the output current of LED drive power from
0%-100% ranges.
By implementing the utility model, it is only necessary to an I/O interface, and it is adjustable shut-off point by adjusting resistance values, with
Demand of the different clients to product differentiation is met, and the control program of microprocessor need not be changed repeatedly, can in high volume be made
With the high performance-price ratio chip production of OTP techniques, simplify production procedure, reduce cost.
Above example is only to illustrate technical concepts and features of the present utility model, and its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement accordingly, protection domain of the present utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model right is done, all should belong to the utility model claim covers model
Enclose.
Claims (10)
1. a kind of single I/O interface LED adjusting control circuits, it is characterised in that including：Dim signal process circuit and breaking circuit,
I/O interface connects the dim signal input of LED drive power, AC-L-INPUT by the dim signal process circuit
Interface connects the mains electricity input end of LED drive power by the breaking circuit, and AC-N-INPUT interfaces connect the LED drivings
The mains electricity input end of power supply, the dim signal process circuit connects the breaking circuit；
The breaking circuit controls the city of LED drive power by gathering the dim signal that the dim signal process circuit is exported
Electric break-make, the dim signal of the dim signal process circuit output is less than preset value, then LED drive power disconnects；It is described to adjust
The dim signal of optical signal processing circuit output is more than the preset value, then LED drive power is connected.
2. single I/O interface LED adjusting control circuits according to claim 1, it is characterised in that the breaking circuit includes：
Comparator, the first bleeder circuit, the second bleeder circuit, on-off circuit, relay,
The output end of the dim signal process circuit connects the homophase input of the comparator by second bleeder circuit
End, the comparator connects the relay by the on-off circuit；First bleeder circuit connects the comparator
Inverting input；First bleeder circuit and on-off circuit connection the positive source VCC；
The dim signal of the dim signal process circuit output is less than preset value, the input of the in-phase input end of the comparator
Level is less than the incoming level of inverting input, and the on-off circuit controls the relay to disconnect；
The dim signal of the dim signal process circuit output is more than preset value, the input of the in-phase input end of the comparator
Level is higher than the incoming level of inverting input, and the on-off circuit controls the relay closure.
3. single I/O interface LED adjusting control circuits according to claim 2, it is characterised in that first bleeder circuit
Including：Resistance R6 and resistance R7,
The inverting input of the comparator passes through the resistance R6 connection positive sources VCC, the anti-phase input of the comparator
End is by resistance R7 ground connection, the reference voltage input that positive source VCC is produced after the resistance R6 and resistance R7 partial pressures
The inverting input of the comparator.
4. single I/O interface LED adjusting control circuits according to claim 3, it is characterised in that second bleeder circuit
Including：Resistance R4 and resistance R5,
The in-phase input end of the comparator by the resistance R4 connections dim signal process circuit, the comparator
In-phase input end is grounded by the resistance R5, the dim signal of dim signal process circuit output through the resistance R4 and
The in-phase input end of the comparator is inputted after resistance R5 partial pressures.
5. single I/O interface LED adjusting control circuits according to claim 4, it is characterised in that the resistance R4, resistance
R5, resistance R6, resistance R7 are adjustable resistance,
The intrinsic standoff ratio of first bleeder circuit is adjusted by adjusting the resistance R6 and resistance R7 resistance, by adjusting
Resistance R4 and resistance R5 resistance is stated to adjust the intrinsic standoff ratio of second bleeder circuit；By adjusting first bleeder circuit
The shut-off point of LED is adjusted with the intrinsic standoff ratio of the second bleeder circuit.
6. single I/O interface LED adjusting control circuits according to claim 5, it is characterised in that the on-off circuit includes：
Triode Q2 and diode D1,
The base stage of the triode Q2 connects the output end of the comparator, the grounded emitter of the triode Q2, described three
Pole pipe Q2 colelctor electrode connects the positive pole of the diode D1, the negative pole connection positive source VCC of the diode D1.
7. single I/O interface LED adjusting control circuits according to claim 6, it is characterised in that the breaking circuit is also wrapped
Include：FET Q1, resistance R8,
The grid of the FET Q1 connects the output end of the comparator, and the drain electrode of the FET Q1 passes through the electricity
Hinder the inverting input of the R8 connections comparator, the source ground of the FET Q1；
The dim signal of the dim signal process circuit output is more than preset value, the input of the in-phase input end of the comparator
Level is higher than the incoming level of inverting input, and the signal of the comparator output drives the FET Q1 conductings, and then
The level of the inverting input of the comparator is dragged down, voltage difference is produced between the upset point for making the comparator.
8. single I/O interface LED adjusting control circuits according to claim 7, it is characterised in that the resistance R8 is adjustable
Resistance, adjusts LED drive power by adjusting the resistance of the resistance R8 and disconnects and signal difference between opening.
9. according to any described single I/O interface LED adjusting control circuits of claim 1-8, it is characterised in that the light modulation letter
Number process circuit includes：Resistance R1, resistance R2, resistance R3, electric capacity C1, operational amplifier,
The in-phase input end of the operational amplifier by the resistance R1 connections I/O interface, the operational amplifier it is same
Phase input is grounded by the electric capacity C1, and the inverting input of the operational amplifier is grounded by the resistance R2, described
The inverting input of operational amplifier passes through the output end of the resistance R3 connections operational amplifier, the operational amplifier
Output end output dim signal.
10. single I/O interface LED adjusting control circuits according to claim 9, it is characterised in that the resistance R2 and resistance
R3 resistance is equal, and input signal is amplified 2 times by the operational amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621470394.8U CN206413223U (en) | 2016-12-29 | 2016-12-29 | A kind of single I/O interface LED adjusting control circuits |
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| CN201621470394.8U CN206413223U (en) | 2016-12-29 | 2016-12-29 | A kind of single I/O interface LED adjusting control circuits |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108093523A (en) * | 2017-12-26 | 2018-05-29 | 深圳市崧盛电子股份有限公司 | AC dump and the control circuit and power supply of light modulation shut-off |
| CN111654276A (en) * | 2020-06-18 | 2020-09-11 | 湖南中科电气股份有限公司 | Switching value signal control circuit and control method |
| CN111654276B (en) * | 2020-06-18 | 2024-05-14 | 湖南中科电气股份有限公司 | Switching value signal control circuit and control method |
-
2016
- 2016-12-29 CN CN201621470394.8U patent/CN206413223U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108093523A (en) * | 2017-12-26 | 2018-05-29 | 深圳市崧盛电子股份有限公司 | AC dump and the control circuit and power supply of light modulation shut-off |
| CN111654276A (en) * | 2020-06-18 | 2020-09-11 | 湖南中科电气股份有限公司 | Switching value signal control circuit and control method |
| CN111654276B (en) * | 2020-06-18 | 2024-05-14 | 湖南中科电气股份有限公司 | Switching value signal control circuit and control method |
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