CN109640446A - A kind of IC chip, driving circuit and lamp control system - Google Patents
A kind of IC chip, driving circuit and lamp control system Download PDFInfo
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- CN109640446A CN109640446A CN201811584653.3A CN201811584653A CN109640446A CN 109640446 A CN109640446 A CN 109640446A CN 201811584653 A CN201811584653 A CN 201811584653A CN 109640446 A CN109640446 A CN 109640446A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The present invention provides a kind of IC chip, driving circuit and lamp control system, IC chip includes control module, I2C communication protocol module, at least one linear constant current circuit, wherein I2C communication protocol module receives exterior I2The I that C communication protocol controller is sent2C protocol communication signal, according to I2C protocol communication signal generates the control command for controlling at least one linear constant current circuit output size of current and is sent to control module；Control module is generated corresponding control signal according to control command, the output size of current of at least one linear constant current circuit is controlled using control signal, controls the LED load size of current connected with corresponding output pin by least one linear constant current circuit.By by I2C communication protocol module and linear constant current circuit are integrated in an IC chip, can pass through external I2The more convenient LED load to the connection of IC chip output pin of C communication protocol controller realizes corresponding control.
Description
Technical field
The present invention relates to lighting technical fields, more particularly to a kind of IC chip, driving circuit and lamp control system.
Background technique
With the continuous development of lighting engineering, requirement of the people to illumination is also higher and higher.Many lamps in the prior art
Have the function of color temperature and light modulation, and if how to guarantee when in a lamps and lanterns including more lamp units in each lamps and lanterns
Under the premise of unit is mutually indepedent, effectively lamp unit each in lamps and lanterns is individually controlled, i.e., by individually to each lamps and lanterns
Unit light modulation and toning are the current technical issues that need to address to realize the light modulation to whole lamp unit, toning.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State a kind of IC chip, driving circuit and the lamp control system of problem.
According to the present invention on the one hand, a kind of IC chip is provided, which is characterized in that including control module and the control
The I that module is separately connected2C communication protocol module, at least one linear constant current circuit, wherein the IC chip have with it is described
I2The DIM pin of C communication protocol module connection, the output pin connecting with the linear constant current circuit, the output pin are used
In connection LED load；
The I2C communication protocol module is configured to receive exterior I using the DIM pin2C communication protocol controller is sent
I2C protocol communication signal, according to the I2C protocol communication signal is generated for controlling the output of at least one linear constant current circuit
The control command of size of current, and it is sent to the control module；
The control module is configured to generate corresponding control signal according to the control command, be believed using the control
Number the output size of current of at least one linear constant current circuit is controlled, and then passes through at least one described linear constant current circuit
Control the LED load size of current connected with corresponding output pin.
Optionally, the linear constant current circuit includes the constant-current driven module connecting with the control module,
For a linear constant current circuit, the control module controls the perseverance in the linear constant current circuit using control signal
The reference voltage size of drive module is flowed, and then controls the output size of current and corresponding LED load of the linear constant current circuit
Size of current；
Wherein, if the reference voltage of the constant-current driven module reduces, the output electric current of the linear constant current circuit and right
The LED load electric current answered reduces.
Optionally, the linear constant current circuit further includes output voltage sampling module and active component connected to it,
In,
The output voltage sampling module is also connect with the control module, and the active component also drives with the constant current
Module connection；
For a linear constant current circuit, the output voltage sampling module is configured to sample the linear constant current circuit
The output voltage sampled is supplied to control module by output voltage, wherein if the output voltage sampling module is supplied to institute
Minimum output voltage value of the output voltage of control module in predetermined period is stated less than setting value, the control module control should
The reference voltage of constant-current driven module in linear constant current circuit reduces, and the constant-current driven module controls the active component and is
The output electric current of magnifying state, the linear constant current circuit reduces, until the minimum output voltage of the linear constant current circuit sampled
Value is greater than the setting value.
Optionally, for a linear constant current circuit, the output voltage sampling module, be additionally configured to sample is somebody's turn to do
The output voltage of linear constant current circuit is supplied to the control module, if the output voltage for being provided to the control module is greater than the
One preset voltage value, the reference voltage that the control module controls the constant-current driven module in the linear constant current circuit reduce, should
Constant-current driven module controls the active component work in off state, and the output voltage of the linear constant current circuit increases, institute
State the reduction of LED load voltage.
Optionally, the linear constant current circuit includes output current sampling module, and the IC chip makes at least one
Energy pin, and an enabled pin connects an output current sampling module；
The constant current for a linear constant current circuit, in the output current sampling module and the linear constant current circuit
Drive module, the control module, the active component, the enabled pin are separately connected；
The output current sampling module is configured to the voltage value sampled at enabled pin connected to it and is provided to institute
Constant-current driven module in linear constant current circuit, the constant-current driven module is according to the voltage value received and its reference voltage fortune
Calculation obtains output signal, is corresponding LED load when using the output signal, to control corresponding active component be magnifying state
Constant current is provided；
The output current sampling module is additionally configured to sample the voltage value at enabled pin connected to it, if sampling
The voltage value arrived is greater than the second preset voltage value, then controls the benchmark electricity that the control module reduces corresponding constant-current driven module
Pressure, the constant-current driven module control corresponding active component work in off state, the output electricity of corresponding linear constant current circuit
Stream is decreased to zero.
Optionally, IC chip further include:
Thermal-shutdown circuit is connect with the control module, is configured to detect the temperature of the IC chip；
If the thermal-shutdown circuit detects that the temperature of IC chip is higher than preset temperature range, the control module is controlled
Reduce the reference voltage of the constant-current driven module at least one described linear constant current circuit, at least one linear constant current electricity
The output electric current on road reduces, until the temperature of the IC chip is in the preset temperature range；
If the thermal-shutdown circuit detects that the temperature of IC chip lower than the preset temperature range, controls the control
Module increases the reference voltage of the constant-current driven module at least one described linear constant current circuit, at least one described linear perseverance
The output electric current of current circuit increases, and until the output electric current of the linear constant current circuit increases to default maximum current, makes described
The temperature of IC chip is in the preset temperature range.
Optionally, the active component includes triode or field-effect tube；
Wherein, if the active component uses field-effect tube, the grid of the field-effect tube connects linear constant current where it
Constant-current driven module in circuit, the output current sampling module where source electrode connects it in linear constant current circuit, drain electrode connection
Output voltage sampling module where it in linear constant current circuit.
It optionally, further include power pins Vin, energization pins VCC and inside electricity in IC chip described in the IC chip
Source circuit,
The power pins Vin, connect with the interior power supply circuit；
The interior power supply circuit is connect with the energization pins VCC and the control module, is configured to as the control
Module for power supply.
Optionally, the IC chip includes two linear constant current circuits, two output pins, two enabled pins, wherein
Output voltage sampling module that one linear constant current circuit includes connect an output pin and it includes output
Current sampling module connects an enabled pin；
The output voltage sampling module that another linear constant current circuit includes connect another output pin and it includes
Output current sampling module connects another enabled pin；
Constant-current driven module, output voltage sampling module and the output current sample mould of described two linear constant current circuits
Block is also connect with the control module respectively.
Another aspect according to the present invention additionally provides a kind of driving circuit, comprising: switch element, rectification module, capacitor
Element C, at least one sampling resistor, I2C communication protocol interface, the IC chip as described in any embodiment above, wherein
The rectification module is separately connected with the switch element and the capacity cell C；
One end of one sampling resistor connects an enabled pin, other end ground connection, and the sampling resistor is configured to institute
The output electric current for stating linear constant current circuit is converted to voltage value, and is provided to the output current sampling module；
The I2C communication protocol interface is separately connected with the DIM pin and grounding pin of the IC chip, is configured to connect
Receive exterior I2The I that C communication protocol controller is sent2C protocol communication signal, and the I that will be received2C protocol communication signal is sent to
I in the IC chip2C communication protocol module.
Optionally, driving circuit further includes capacity cell C2, the capacity cell C2, and one end connects the energization pins
VCC, other end ground connection.
According to the present invention in another aspect, additionally providing a kind of lamp control system, comprising: I2C communication protocol controller
With multiple lamps and lanterns for being provided with driving circuit in any embodiment above connected to it, wherein the driving circuit of each lamps and lanterns
The I for being included2Be provided with unique I in C communication protocol module in advance2C protocol communication address code；
The lamps and lanterns are configured to through the I in own drive circuit2C communication protocol module is to the I2C communication protocol control
Device processed sends preconfigured I2C protocol communication address code；
The I2C communication protocol controller is configured to receive the I that each lamps and lanterns are sent2C protocol communication address code simultaneously stores, with
And the control instruction that user issues is received, I is generated according to the control instruction2C protocol communication signal, by I2C protocol communication signal
It is sent to corresponding I2In the corresponding lamps and lanterns of C protocol communication address code；
Any lamps and lanterns include LED load, and the output pin of the LED load and the IC chip where it in lamps and lanterns connects
It connects, the lamps and lanterns, is additionally configured to utilize the I received2C protocol communication signal controls the size of current of the LED load of itself.
In embodiments of the present invention, by by control module, I2C communication protocol module and linear constant current circuit are integrated in one
In a IC chip, the peripheral cell of driving can be not only reduced, the production cost of element cost and lamps and lanterns is saved, can also pass through
External I2The more convenient LED load to the connection of IC chip output pin of C communication protocol controller realizes corresponding control.
Further, multiple IC chips are separately positioned in different lamps unit, can be effectively realized to different lamps unit
Individually control.Moreover, forming combination lamp by the way that each lamp unit to be optionally combined, being produced into for lamps and lanterns can be not only saved
This, can save the packing cost of lamps and lanterns.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows the schematic diagram of internal structure of IC chip according to an embodiment of the invention；
Fig. 2 a shows a kind of electrical block diagram that the output voltage sampling module in IC chip includes；
Fig. 2 b shows another electrical block diagram that the output voltage sampling module in IC chip includes；
Fig. 3 shows the schematic diagram of internal structure of IC chip in accordance with another embodiment of the present invention；
Fig. 4 shows the structural schematic diagram of driving circuit according to an embodiment of the invention；
Fig. 5 shows the structural schematic diagram of lamp control system according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
In order to solve the above technical problems, the embodiment of the invention provides a kind of IC chips.Referring to Fig. 1, IC chip includes control
Molding block 1, the I being separately connected with control module 12C communication protocol module 2, at least one linear constant current circuit.Fig. 1 is shown
IC chip includes a linear constant current circuit 10, this is only schematical certainly, actually may include other in IC chip
The linear constant current circuit of quantity does not do specific restriction herein.
IC chip has and I2The DIM pin of the connection of C communication protocol module 2, the output being connect with linear constant current circuit 10
Pin OUT1, output pin OUT1 are for connecting LED load.
I2C communication protocol module 2 is configured to receive exterior I using DIM pin2C communication protocol controller (does not show in Fig. 1
The I sent out)2C protocol communication signal, according to I2C protocol communication signal is generated for controlling at least one linear constant current circuit 10
The control command of size of current is exported, and is sent to control module 1.
Control module 1 is configured to generate corresponding control signal according to control command, utilizes control signal control at least one
The output size of current of a linear constant current circuit 10, and then pass through the control of at least one linear constant current circuit 10 and corresponding output
The LED load size of current of pin OUT1 connection.
In embodiments of the present invention, by by control module 1, I2C communication protocol module 2 and linear constant current circuit 10 are integrated
In an IC chip, the peripheral cell of driving can be not only reduced, save the production cost of element cost and lamps and lanterns, it can be with
Pass through external I2The more convenient LED load to the OUT1 connection of IC chip output pin of C communication protocol controller realizes phase
The control answered.
Referring to Fig. 1, in an embodiment of the present invention, linear constant current circuit 10 further includes the constant current connecting with control module 1
Drive module 11.For linear constant current circuit 10, control module 1 using control signal by being controlled in the linear constant current circuit 10
Constant-current driven module 11 reference voltage Vref1 size, and then the output electric current that can control the linear constant current circuit 10 is big
Small and corresponding LED load size of current.For example, if the constant current where the control of control module 1 in linear constant current circuit 10 drives
The reference voltage Vref1 of module 11 reduces, then the output electric current of the linear constant current circuit 10 and corresponding LED load electric current subtract
It is small.
With continued reference to Fig. 1, in an embodiment of the present invention, linear constant current circuit 10 further includes output voltage sampling module 12
With active component connected to it (MOS1 as shown in figure 1).
Wherein, output voltage sampling module 12 is also connect with control module 1, and active component also connects with constant-current driven module 11
It connects.For linear constant current circuit 10, output voltage sampling module 12 is configured to sample the output electricity of the linear constant current circuit 10
Pressure, is supplied to control module 1 for the output voltage sampled.If output voltage sampling module 12 is supplied to the defeated of control module 1
Minimum output voltage value of the voltage in predetermined period is less than setting value out, then control module 1 controls the linear constant current circuit 10
In constant-current driven module 11 reference voltage Vref1 reduce, and then constant-current driven module 11 control active component be amplification shape
The output electric current of state, linear constant current circuit 10 reduces, until the minimum output voltage value of the linear constant current circuit 10 sampled is big
In setting value.
The embodiment can rapidly adjust the output electric current of linear constant current circuit 10, so that output electric current ripple-free, keeps away
There is stroboscopic phenomenon in lamps and lanterns where having exempted from circuit, also achieve the overcurrent protection to circuit.When network voltage is lower, though
Right linear constant current circuit 10 exports electric current and reduces, and the luminous flux of lamps and lanterns is reduced, but lamps and lanterns do not have stroboscopic.
Predetermined period in the embodiment can be arbitrary the period, such as in predetermined period be T=1/50Hz, T=1/
100Hz etc. period, the embodiment of the present invention do not do specific restriction to this.
In an alternative embodiment of the invention, output voltage sampling module 12 is in the linear constant current circuit 10 that will be sampled
After output voltage is supplied to control module 1, if the output voltage for being provided to control module 1 is greater than the first preset voltage value, control
The reference voltage Vref1 that molding block 1 controls the constant-current driven module 11 in the linear constant current circuit 10 is decreased to specified voltage
Value, also, the constant-current driven module 11 control active component work, in off state, the output voltage of linear constant current circuit 10 increases
Greatly, LED load voltage reduces, to realize that OVP (over voltage protection, overvoltage protection) is protected.
A referring to Fig. 1 and Fig. 2, in an embodiment of the present invention, output voltage sampling module 12 may include as shown in Figure 2 a
Comparator U, the first divider resistance R1 ', the second divider resistance R2 '.Wherein, first one end divider resistance R1 ' connects second point
Piezoresistance R2 ', the other end connect active component (MOS1 as shown in Figure 1), second divider resistance R2 other end ground connection.
Comparator U has positive input terminal (+), negative input end (-), output end vo, and positive input terminal is connected to the first partial pressure electricity
It hinders between R1 ' and the second divider resistance R2 ', negative input end receives reference voltage Vref3, output end vo link control module 1.
In this embodiment, comparator U is configurable to, and the output voltage of sampling linear constant-current circuit 10 is in the second partial pressure
The voltage (i.e. the voltage of Vout point) got on resistance R2 ', and compare the big of the voltage value that samples and reference voltage Vref3
It is small, learn that the voltage value sampled is less than reference voltage Vref3 if comparing, output end vo exports low level to control module 1
Signal, after control module 1 receives low level signal, the reference voltage Vref1 that can control constant current driving mould 11 reduces, and then line
Property constant-current circuit 10 output electric current reduce.
In addition, if comparator U relatively learns the voltage value that samples and is greater than reference voltage Vref3, output end vo is to control
Molding block 1 exports high level signal, and the amplitude of high level signal is VCC.
B referring to fig. 2, in an embodiment of the present invention, relative to the connection type of comparator U in Fig. 2 a, comparator U may be used also
With by its positive input terminal and negative input end reversal connection, specifically, the negative input end of comparator U be connected to the first divider resistance R1 ' and
Between second divider resistance R2 ', positive input terminal receives reference voltage Vref3, output end vo link control module 1.
In this embodiment, comparator U may be configured such that the output voltage of sampling linear constant-current circuit 10 at second point
The voltage got on piezoresistance R2 ', and compare the size of the voltage value and reference voltage Vref3 sampled, it is adopted if comparing and learning
The voltage value that sample arrives is less than reference voltage Vref3, then output end vo exports high level to control module 1, and control module 1 controls perseverance
The reference voltage Vref1 for flowing drive module 11 reduces, and then the output electric current of linear constant current circuit 10 reduces.
In embodiments of the present invention, the output end OUT1 of linear constant current circuit 10 can also be with the positive input terminal of comparator U
It is directly connected to, that is, omits the first divider resistance R1 ', the pressure drop on the second divider resistance R2 ' at this time is linear constant current circuit 10
The output voltage of output pin OUT1.In addition, output voltage sampling module 12 can also be using such as operation in the embodiment of the present invention
Other circuits such as amplifier realize voltage sample, and the embodiment of the present invention does not do specific restriction to this.
With continued reference to Fig. 1, in an embodiment of the present invention, linear constant current circuit 10 further includes output current sampling module
13, IC chip has at least one enabled pin, and an enabled pin connects an output current sampling module.The IC of Fig. 1
It include a linear constant current circuit 10 in chip, therefore IC chip has an enabled pin CS1.
For linear constant current circuit 10, the constant current exported in current sampling module 13 and the linear constant current circuit 10 drives mould
Block 11, control module 1, active component (such as MOS1), enabled pin are separately connected.
Output current sampling module 13 is configured to, where sampling the voltage value at enabled pin connected to it and being provided to
Constant-current driven module 11 in linear constant current circuit 10, the constant-current driven module 11 is according to the voltage value received and its benchmark electricity
Pressure Vref1 operation obtains output signal, is corresponding when using output signal, to control corresponding active component be magnifying state
LED load provides constant current.
In addition, output current sampling module 13 is additionally configured to, the voltage value at enabled pin connected to it is sampled, if adopting
The voltage value that sample arrives is greater than the second preset voltage value, then controls the benchmark that control module 1 reduces corresponding constant-current driven module 11
Voltage Vref1, the constant-current driven module 11 control corresponding active component work in off state, corresponding linear constant current circuit
10 output electric current is decreased to zero, to realize that OCP (over current protection, overcurrent protection) is protected.The reality
It applies in example, control module 1 can reduce reference voltage Vref1 to a specific voltage value of constant-current driven module 11.
In an embodiment of the present invention, active component may include triode or field-effect tube, in embodiment illustrated in fig. 1
Constant-current driven module of the active component using field-effect tube, in the gate connection line constant-current circuit 10 of field-effect tube MOS1
11, the output current sampling module 13 in source connection lines constant-current circuit 10 is defeated in drain bond wires constant-current circuit 10
Voltage sample module 12 out.
It further include thermal-shutdown circuit 3 in IC chip with continued reference to Fig. 1, thermal-shutdown circuit 3 is connect with control module 1,
It is configured to the temperature of detection IC chip.
If thermal-shutdown circuit 3 detects that the temperature of IC chip is higher than preset temperature range, control control module 1 is decreased to
The reference voltage Vref1 of constant-current driven module 11 in a few linear constant current circuit 10, at least one linear constant current circuit 10
Output electric current reduce, until the temperature of IC chip is in preset temperature range.
If thermal-shutdown circuit 3 detects the temperature of IC chip lower than preset temperature range, control control module 1 is increased to
The reference voltage Vref1 of constant-current driven module 11 in a few linear constant current circuit 10, at least one linear constant current circuit 10
Output electric current increase, until the output electric current of linear constant current circuit 10 increases to default maximum current, make the temperature of IC chip
In preset temperature range.
It includes two linear constant current circuits (i.e. linear constant current circuit 10 and linear constant current circuits that Fig. 3, which shows IC chip,
20), correspondingly, IC chip also include two output pins (i.e. output pin OUT1 and output pin OUT2), two enabled draw
Foot (i.e. enabled pin CS1 and enabled pin CS2), wherein the output voltage sampling module 12 that linear constant current circuit 10 includes connects
Connect output pin OUT1, it includes output current sampling module 13 connect enabled pin CS1.Linear constant current circuit 20 includes
Output voltage sampling module 22 connect another output pin OUT2, it includes output current sampling module 23 connect enabled pin
CS2.Also, the constant-current driven module 11 of linear constant current circuit 10, output voltage sampling module 12, output current sampling module 13
It is connect respectively with control module 1.Constant-current driven module 21, output voltage sampling module 22, the output electricity of linear constant current circuit 20
Stream sampling module 23 is also connect with control module 1 respectively.In this embodiment, the linear perseverance of each of two linear constant current circuits
The course of work of each module in current circuit may refer to foregoing embodiments, and details are not described herein again.
In the embodiment, IC chip can be based on exterior I2The I that C communication protocol controller (being not shown in Fig. 3) is sent2C association
Signal of communication is discussed to control the output electric current of each linear constant-current circuit, and then controls the electric current for flowing through LED load.For example, if
I2C communication protocol module 2 is according to I2The control command that C protocol communication signal generates is that control linear constant current circuit 10 exports maximum
Electric current, linear constant current circuit 20 do not export electric current, then, after control module 1 generates corresponding control signal according to control command,
Exporting maximum current using the output pin OUT1 of control signal control line constant-current circuit 10, (corresponding LED load can become
It is bright), the output pin OUT2 of linear constant current circuit 20 do not export electric current (corresponding LED load does not shine).Certainly, according to different
I2C protocol communication signal, the output electric current that IC chip can also control each linear constant-current circuit is other states, such as any
Output electric current reduction of linear constant-current circuit etc., does not do specific restriction herein.
In this embodiment, when thermal-shutdown circuit 3 works, control module 1 is being reduced at least two linear constant current electricity
During the reference voltage of constant-current driven module in road, the base of each constant-current driven module can be reduced according to scheduled rule
Quasi- voltage, for example, control module 1 reduces the reference voltage Vref1 and line of the constant-current driven module 11 in linear constant current circuit 10
Property constant-current circuit 20 in constant-current driven module 21 reference voltage Vref2 when, can with equal proportion reduce Vref1 and Vref2.
In addition, control module 1 increase linear constant current circuit 10 in constant-current driven module 11 reference voltage Vref1 and
During the reference voltage Vref2 of constant-current driven module 21 in linear constant current circuit 20, can with equal proportion increase Vref1 with
Vref2。
It in an embodiment of the present invention, in IC chip further include power pins Vin and inside electricity with continued reference to Fig. 1 and Fig. 2
Source circuit 4.Wherein, power pins Vin is connect with interior power supply circuit 4.Interior power supply circuit 4 is also connect with control module 1, from
It and is that control module 1 is directly powered, and then is powered indirectly for constant-current driven module 11.
Based on the same inventive concept, the embodiment of the invention also provides a kind of driving circuits, referring to fig. 4, driving circuit packet
Switch element S, rectification module are included (using rectifier bridge DB), capacity cell C, at least one sampling resistor, I in Fig. 42C communication protocols
IC chip in view interface, any embodiment such as above, wherein the linear constant current circuit in the quantity and IC chip of sampling resistor
Quantity it is consistent, show two sampling resistors in example shown in Fig. 4, corresponding IC chip includes two linear constant current circuits
(being not shown in Fig. 4), two linear constant current circuits are separately connected LED load all the way, wherein two paths of LED load can use phase
Same color, can also use different colors.
In this embodiment, rectification module (such as rectifier bridge DB) is separately connected with switch element S and capacity cell C.Also,
One end of one sampling resistor connects an enabled pin, other end ground connection.For example, in Fig. 3 and Fig. 4, sampling resistor R3 connection
Enabled pin CS1, sampling resistor R4 connection enable pin CS2.Sampling resistor R3 is configured to the output of linear constant current circuit 10
Electric current is converted to voltage value, and is provided to output current sampling module 13.Sampling resistor R4 is configured to linear constant current circuit 20
Output electric current be converted to voltage value, and be provided to output current sampling module 23.
I2C communication protocol interface is separately connected with the DIM pin and grounding pin GND of IC chip, is configured to receive external
I2The I that C communication protocol controller is sent2C protocol communication signal, and the I that will be received2C protocol communication signal is sent to IC chip
In I2C communication protocol module 2.
In an alternative embodiment of the invention, at least one sampling resistor can also be arranged in the inside of IC chip, it will
The output electric current of linear constant current circuit is converted to voltage value, and is supplied to output current sampling module sampling.
With continued reference to Fig. 4, in an alternative embodiment of the invention, driving circuit further includes capacity cell C2, capacity cell C2
One end connects energization pins VCC, other end ground connection.The capacity of capacity cell C2 mainly examines filter in switch element S disconnection and power grid
Connection after, IC chip can maintain the time of work.
The embodiment of the invention also provides a kind of lamp control systems, referring to Fig. 5, lamp on the basis of Fig. 1, Fig. 3, Fig. 4
Having control system includes: I2It C communication protocol controller 30 and connected to it multiple is provided with as in any embodiment above
Lamps and lanterns (lamps and lanterns 1, lamps and lanterns 2 ... lamps and lanterns n) in such as Fig. 5, wherein the driving circuit of each lamps and lanterns included of driving circuit
I2Unique I is provided in advance in C communication protocol module 2 (as shown in Figure 1)2C protocol communication address code.
Any one lamps and lanterns is configurable to through the I in own drive circuit2C communication protocol module 2 is to I2C communication protocol
Controller 30 sends preconfigured I2C protocol communication address code.It will unique I2C protocol communication address code tells I2C communication
Protocol controller 30.
I2C communication protocol controller 30 is configured to receive the I that each lamps and lanterns are sent2C protocol communication address code simultaneously stores.And
And the control instruction of user's sending can also be received, I is generated according to control instruction2C protocol communication signal, by I2C protocol communication
Signal is sent to corresponding I2In the corresponding lamps and lanterns of C protocol communication address code.Wherein, it can be carried in the control instruction that user issues
Want the lamps and lanterns information of control, I2C communication protocol controller 30 may thereby determine that out by analyzing these information and need to control
The corresponding I of lamps and lanterns2C protocol communication address code, and then by I2C protocol communication signal is sent to determining I2C protocol communication address
In the corresponding lamps and lanterns of code.
Any lamps and lanterns include LED load (Fig. 5 is not shown), and the output of LED load and the IC chip in lamps and lanterns where it is drawn
Foot (such as output pin OUT1, OUT2) connection.Each lamps and lanterns can use the I received2C protocol communication signal controls itself
The size of current of LED load, to realize the light modulation to lamps and lanterns, toning.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: at this
Within the spirit and principle of invention, it is still possible to modify the technical solutions described in the foregoing embodiments or right
Some or all of the technical features are equivalently replaced；And these are modified or replaceed, and do not make corresponding technical solution de-
From protection scope of the present invention.
Claims (12)
1. a kind of IC chip, which is characterized in that including control module, the I being separately connected with the control module2C communication protocol mould
Block, at least one linear constant current circuit, wherein
The IC chip has and the I2The DIM pin of C communication protocol module connection is connect with the linear constant current circuit
Output pin, the output pin is for connecting LED load；
The I2C communication protocol module is configured to receive exterior I using the DIM pin2What C communication protocol controller was sent
I2C protocol communication signal, according to the I2C protocol communication signal is generated for controlling at least one linear constant current circuit output electricity
The control command of size is flowed, and is sent to the control module；
The control module is configured to generate corresponding control signal according to the control command, utilizes the control signal control
The output size of current of at least one linear constant current circuit is made, and then passes through at least one linear constant current circuit control
With the LED load size of current of corresponding output pin connection.
2. IC chip according to claim 1, which is characterized in that the linear constant current circuit includes and the control module
The constant-current driven module of connection,
For a linear constant current circuit, the control module controls the constant current in the linear constant current circuit using control signal and drives
The reference voltage size of dynamic model block, so control the linear constant current circuit output size of current and corresponding LED load electric current
Size；
Wherein, if the reference voltage of the constant-current driven module reduces, the output electric current of the linear constant current circuit and corresponding
LED load electric current reduces.
3. IC chip according to claim 2, which is characterized in that the linear constant current circuit further includes output voltage sampling
Module and active component connected to it, wherein
The output voltage sampling module is also connect with the control module, the active component also with the constant-current driven module
Connection；
For a linear constant current circuit, the output voltage sampling module is configured to sample the output of the linear constant current circuit
The output voltage sampled is supplied to control module by voltage, wherein if the output voltage sampling module is supplied to the control
Minimum output voltage value of the output voltage of molding block in predetermined period is less than setting value, and it is linear that the control module controls this
The reference voltage of constant-current driven module in constant-current circuit reduces, and it is amplification that the constant-current driven module, which controls the active component,
The output electric current of state, the linear constant current circuit reduces, until the minimum output voltage value of the linear constant current circuit sampled is big
In the setting value.
4. IC chip according to claim 3, which is characterized in that
For a linear constant current circuit, the output voltage sampling module is additionally configured to the linear constant current that will be sampled electricity
The output voltage on road is supplied to the control module, if the output voltage for being provided to the control module is greater than the first predeterminated voltage
Value, the reference voltage that the control module controls the constant-current driven module in the linear constant current circuit reduce, which drives mould
Block controls the active component work in off state, and the output voltage of the linear constant current circuit increases, the LED load electricity
Pressure reduces.
5. IC chip according to claim 3 or 4, which is characterized in that the linear constant current circuit includes that output electric current is adopted
Egf block, the IC chip has at least one enabled pin, and an enabled pin connects an output current sampling module；
For a linear constant current circuit, the constant current in the output current sampling module and the linear constant current circuit is driven
Module, the control module, the active component, the enabled pin are separately connected；
The output current sampling module, be configured to the voltage value sampled at enabled pin connected to it and be provided to it is online
Property constant-current circuit in constant-current driven module, which obtains according to the voltage value that receives and its reference voltage operation
To output signal, when using the output signal, to control corresponding active component be magnifying state, provided for corresponding LED load
Constant current；
The output current sampling module is additionally configured to sample the voltage value at enabled pin connected to it, if sample
Voltage value is greater than the second preset voltage value, then controls the reference voltage that the control module reduces corresponding constant-current driven module,
The constant-current driven module controls corresponding active component work in off state, and the output electric current of corresponding linear constant current circuit subtracts
As low as zero.
6. according to the described in any item IC chips of claim 2 to 4, which is characterized in that further include:
Thermal-shutdown circuit is connect with the control module, is configured to detect the temperature of the IC chip；
If the thermal-shutdown circuit detects that the temperature of IC chip is higher than preset temperature range, controls the control module and reduce
The reference voltage of constant-current driven module at least one described linear constant current circuit, at least one linear constant current circuit
It exports electric current to reduce, until the temperature of the IC chip is in the preset temperature range；
If the thermal-shutdown circuit detects that the temperature of IC chip lower than the preset temperature range, controls the control module
Increase the reference voltage of the constant-current driven module at least one described linear constant current circuit, at least one linear constant current electricity
The output electric current on road increases, and until the output electric current of the linear constant current circuit increases to default maximum current, makes the IC core
The temperature of piece is in the preset temperature range.
7. IC chip according to claim 5, which is characterized in that the active component includes triode or field-effect tube；
Wherein, if the active component uses field-effect tube, the grid of the field-effect tube connects linear constant current circuit where it
In constant-current driven module, source electrode connects the output current sampling module in linear constant current circuit where it, and drain electrode connects its institute
Output voltage sampling module in linear constant current circuit.
8. according to the described in any item IC chips of claim 2 to 4, which is characterized in that further include that power supply draws in the IC chip
Foot Vin, energization pins VCC and interior power supply circuit,
The power pins Vin, connect with the interior power supply circuit；
The interior power supply circuit is connect with the energization pins VCC and the control module, is configured to as the control module
Power supply.
9. IC chip according to claim 5, which is characterized in that the IC chip includes two linear constant current circuits, two
A output pin, two enabled pins, wherein
Output voltage sampling module that one linear constant current circuit includes connect an output pin and it includes output electric current
Sampling module connects an enabled pin；
The output voltage sampling module that another linear constant current circuit includes connect another output pin and it includes output
Current sampling module connects another enabled pin；
Constant-current driven module, output voltage sampling module and the output current sampling module of described two linear constant current circuits are also
It is connect respectively with the control module.
10. a kind of driving circuit, comprising: switch element, rectification module, capacity cell C, at least one sampling resistor, I2C communication
Protocol interface, such as described in any item IC chips of claim 1-9, wherein
The rectification module is separately connected with the switch element and the capacity cell C；
One end of one sampling resistor connects an enabled pin, other end ground connection, and the sampling resistor is configured to the line
The output electric current of property constant-current circuit is converted to voltage value, and is provided to the output current sampling module；
The I2C communication protocol interface is separately connected with the DIM pin and grounding pin of the IC chip, is configured to receive external
I2The I that C communication protocol controller is sent2C protocol communication signal, and the I that will be received2C protocol communication signal is sent to the IC
I in chip2C communication protocol module.
11. driving circuit according to claim 10, which is characterized in that it further include capacity cell C2,
The capacity cell C2, one end connect the energization pins VCC, other end ground connection.
12. a kind of lamp control system, comprising: I2C communication protocol controller and connected to it multiple it is provided with claim 10
Or the lamps and lanterns of driving circuit described in 11, wherein the I that the driving circuit of each lamps and lanterns is included2In C communication protocol module in advance
Configured with unique I2C protocol communication address code；
The lamps and lanterns are configured to through the I in own drive circuit2C communication protocol module is to the I2C communication protocol controller
Send preconfigured I2C protocol communication address code；
The I2C communication protocol controller is configured to receive the I that each lamps and lanterns are sent2C protocol communication address code simultaneously stores, Yi Jijie
The control instruction that user issues is received, generates I according to the control instruction2C protocol communication signal, by I2C protocol communication signal is sent
To corresponding I2In the corresponding lamps and lanterns of C protocol communication address code；
Any lamps and lanterns include LED load, and the LED load is connect with the output pin of the IC chip in lamps and lanterns where it,
The lamps and lanterns are additionally configured to utilize the I received2C protocol communication signal controls the size of current of the LED load of itself.
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| CN201811584653.3A CN109640446A (en) | 2018-12-24 | 2018-12-24 | A kind of IC chip, driving circuit and lamp control system |
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| CN201811584653.3A CN109640446A (en) | 2018-12-24 | 2018-12-24 | A kind of IC chip, driving circuit and lamp control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263492A (en) * | 2020-02-27 | 2020-06-09 | 青岛亿联客信息技术有限公司 | Intelligent lamp and lighting system |
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