CN102612232B - Driving control system with multiple LED (light emitting diode) loads for automobile - Google Patents
Driving control system with multiple LED (light emitting diode) loads for automobile Download PDFInfo
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Abstract
The invention provides a driving control system with multiple LED (light emitting diode) loads for an automobile. The driving control system comprises a first power supply unit, a second power supply unit and a control unit, wherein the first power supply unit and the second power supply unit are both provided with a sampling unit and are used for providing load voltages to respective load based on the switching conditions of the respective controlled switch unit; and the control unit is used for outputting a balance signal for controlling a constant unit in the first power supply unit and a switch control signal for regulating and controlling the switching frequency of each controlled switch unit based on the sampling result of each sampling unit, wherein the constant unit is used for converting the direct current voltage output by the first power supply unit into a corresponding load voltage and regulating the corresponding load voltage based on the balance signal, so that the power supplied for each load is kept constant, and the sampling units are used for collecting the voltage signal of each controlled switch unit and the power supply signal of each load. According to the system, the voltage of each load can be kept stable.
Description
Technical field
The present invention relates to drive control field, particularly relate to the driving control system of a kind of many LED of automobile load.
Background technology
Along with the increase of automobile-used high-powered LED lamp, driving control system must provide stabilized power supply to each LED lamp, but when certain LED lamp is in the time glimmering or light and shade regulates, driving control system cannot be adjusted the LED lamp stable output power using to other in time.This makes these LED lamps that using to be subject to excessive or too small voltage, to such an extent as to greatly reduces the useful life of LED lamp.Therefore, how to improve existing driving control system to regulate in time the power output of each LED lamp, for multiple LED lamps provide stable driving control, be those skilled in the art's problems to be solved.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide the driving control system of a kind of many LED of automobile load, to provide stable driving control for multiple LED etc.
For achieving the above object and other relevant objects, the invention provides the driving control system of a kind of many LED of automobile load, it comprises: the first power supply unit, for providing load voltage to a LED load; Described the first power supply unit comprises: the first power supply; The first controlled switch unit, is connected with described the first power supply; The switching of described the first power supply based on described the first controlled switch unit provides the first direct voltage to a LED load; The first constant cell, is connected with described the first controlled switch unit and a described LED load, for described the first direct voltage being converted to the load voltage of a LED load; The first sampling unit, is connected with described the first controlled switch unit and described the first constant cell, samples for the load voltage signal of the voltage signal to described the first controlled switch unit and a LED load.
The second power supply unit, for providing load voltage to the 2nd LED load; Described the second power supply unit comprises: the second power supply; The second controlled switch unit, is connected with described the second power supply; The switching of described the second power supply based on described controlled switch unit provides load voltage to the 2nd LED load; The second sampling unit, is connected with described the second controlled switch unit and described the 2nd LED load, samples for the load voltage signal of the voltage signal to described the second controlled switch unit and described the 2nd LED load.
Control unit, be connected with described the first sampling unit, described the first constant cell and the first controlled switch unit, export for controlling described the first constant cell regulating load voltage for the sampled result based on described the first sampling unit, to realize the first balanced signal of the constant current control to a LED load, and for adjusting the first switch controlling signal of controlling described the first controlled switch unit open/close frequency; And be connected with described the second sampling unit, described the second constant cell and the second controlled switch unit, export the second switch control signal of controlling described the second controlled switch unit open/close frequency for adjusting for the sampled result based on described the second sampling unit.
As mentioned above, the driving control system of many LED load for automobile of the present invention, there is following beneficial effect: the sampled result based on the first sampling unit and the second sampling unit is exported the switch controlling signal of the variable frequency control of DC/DC conversion in difference the first power supply unit and the second power supply unit in real time, to realize the constant current control to described the first power supply unit and the second power supply unit, the load that can make different capacity electric current separately keeps constant, current voltage sampled signal based on gathering each LED load in a LED load is exported and is realized the balanced signal that crossing current is controlled simultaneously, carry out thus to adjust in real time the load voltage of a LED load, make the deviation of power output in 1w, greatly improve the stability of load running.
In addition, utilize control unit to process the various sampled signals that each sampling unit gathers, can shorten the feedback time of signal, improve the operating efficiency of whole driving control system, meanwhile, the responding to switch control signal that controlled switch unit employing field effect transistor can be sensitiveer.
Brief description of the drawings
Fig. 1 is shown as the structural representation of the driving control system of many LED of automobile of the present invention load.
Fig. 2 is shown as the structural representation of the driving control system of a kind of preferred many LED of automobile of the present invention load.
Element numbers explanation
The driving control system of many LED load for 1 automobile
11 first power supply units
111 first controlled switch unit
112 first power supplies
113 first electromagnetic compatibility mode filters
114 flyback transformers
115 first current rectifying and wave filtering circuits
116 first sampling units
131 first no-voltage sample circuits
132 first overvoltage sample circuits
133 first voltage sampling circuits
117 first constant cells
12 second power supply units
121 second controlled switch unit
122 second power supplies
123 second electromagnetic compatibility mode filters
124 step-down/up type circuit
125 second current rectifying and wave filtering circuits
126 second sampling units
151 second no-voltage sample circuits
152 second overvoltage sample circuits
153 second voltage sample circuits
14 control units
21,22,23 loads
Embodiment
By particular specific embodiment explanation embodiments of the present invention, person skilled in the art scholar can understand other advantages of the present invention and effect easily by the disclosed content of this specification below.
Fig. 1 shows the driving control system structural representation of many LED of automobile of the present invention load.Described automobile comprises with the driving control system 1 of many LED load: the first power supply unit 11, the second power supply unit 12 and control unit 14.
Wherein, described the first power supply unit 11 comprises: the first power supply 112, the first controlled switch unit 111, the first sampling unit 116 and the first constant cell 117.
Preferably, described the first controlled switch unit 111 comprises power switch pipe, more preferably, includes but not limited to controlled switch transistor.
Described the first power supply unit 11 is for providing load voltage to a LED load.Wherein, a described LED load comprises vapour LED lamp for vehicles, preferably, described LED load comprises: automobile high-powered LED lamp, and as shown in Figure 2, a described LED load comprises: LED load 21 and LED load 22, described LED load 21 and LED load 22 can be same specification LED load, also can be asymmetric LED load, for example, LED load 21 and LED load 22 are the LED lamp that rated power is 3w; Again for example, the LED lamp that LED load 21 is 2w for rated power; The LED lamp that LED load 22 is 4w for rated power.
Particularly, as shown in Figure 2, described the first power supply unit 11 also comprises the first Electro Magnetic Compatibility filter 113, flyback transformer 114 and the first current rectifying and wave filtering circuit 115.
Described the first power supply 112 is connected with the first electromagnetic compatibility mode filter 113, so that the constant-current supply of stable output; The primary coil of described flyback transformer 114 is connected in the output of described the first electromagnetic compatibility mode filter 113; The secondary coil of described flyback transformer 114 is connected in the input of described the first current rectifying and wave filtering circuit 115, so that described the first current rectifying and wave filtering circuit 115 is exported the first direct voltage; The first output of described the first current rectifying and wave filtering circuit 115 is connected in the input of described the first constant cell 117, the first output of the second output of described the first current rectifying and wave filtering circuit 115 and described the first constant cell 117 provides load voltage to load 21, and the second output of the second output of described the first current rectifying and wave filtering circuit 115 and described the first constant cell 117 provides load voltage to load 22; Meanwhile, the source electrode of described controlled switch unit 111 is connected with one end of described flyback transformer 114 primary coils; The drain electrode of described the first controlled switch unit 111 is connected with an output of described the first electromagnetic compatibility mode filter 113; The grid of described the first controlled switch unit 111 is connected with described control unit 14; Meanwhile, described the first collecting unit 116 is connected to output and first constant cell 117 of described the first controlled switch unit 111 source electrodes, the first current rectifying and wave filtering circuit 115.Preferably, to adopt maximum rated power output can be provided be the flyback transformer of 30W to described flyback transformer 114.
Described the first constant cell 117 is converted to the load voltage of a LED load (LED load 21 and LED load 22) for the direct voltage that described the first power supply 112 is exported.
Preferably, described the first constant cell 117 comprises controlled variable resistance, so that the first direct voltage that described the first current rectifying and wave filtering circuit 115 is exported carries out dividing potential drop, providing load voltage to LED load 21, LED load 22 respectively.
Preferably, described the first constant cell 12 comprises the circuit that controlled switch and fixed resistance form, and coming thus provides required separately load voltage to LED load 21, LED load 22.
It should be noted that, those skilled in the art should understand that, the circuit structure of the first constant cell described above only just lists, but not limitation of the present invention, in fact, anyly direct voltage can be converted to corresponding LED load voltage, to be the circuit of corresponding LED load supplying, all within the scope of the present invention.
Described the first sampling unit 116 is sampled for the load voltage signal of the voltage signal to described the first controlled switch unit 111 and LED load 21, LED load 22.Described load voltage signal includes but not limited to: current current signal, the overvoltage signal of each LED load etc. of voltage signal, each LED load that each LED load is current.Preferably, as shown in Figure 2, described the first sampling unit 116 comprises the first no-voltage sample circuit 131, the first overvoltage sample circuit 132, the first voltage sampling circuit 133.
Described the first no-voltage sample circuit 131 is for sampling to the zero passage voltage of described the first controlled switch unit 111 and described zero passage voltage sampled signal being sent to described control unit 14.Described the first no-voltage sample circuit 131 comprises the circuit of any zero passage voltage that can gather described the first controlled switch unit 111.Preferably, described the first no-voltage sample circuit 131 comprises the edge sense circuit being connected with the source electrode of described the first controlled switch unit 111, gather thus the zero passage voltage sampled signal of described the first controlled switch unit 111, and zero passage voltage sampled signal is sent to described control unit 14.
Described the first overvoltage sample circuit 132 is for sampling to the overvoltage signal of a described LED load and sampled overvoltage sampled signal being sent to described control unit 14.Wherein, described the first overvoltage sample circuit 132 comprises the circuit of any overvoltage sampled signal that can gather LED load.Preferably, described the first overvoltage sample circuit 132 comprises the bleeder circuit and the voltage comparator etc. that are made up of resistance, to relatively described overvoltage sampled signal is sent to described control unit 14 etc. by voltage comparator.
Described the first voltage sampling circuit 133 is for sampling and sampled load voltage sampled signal is sent to described control unit 14 LED load 21, the current load voltage separately of LED load 22, wherein, described current load voltage sampled signal comprises the signal being associated with each LED load voltage, preferably, include but not limited to: the current electric current, the voltage etc. that are connected to the little sampling resistor in load circuit.
Described the first voltage sampling circuit 133 comprises any circuit that can gather the current power supply signal of each LED load.Preferably, described the first voltage sampling circuit 133 comprises the sampling resistor being serially connected in respectively in the loop that described the first constant cell 117 is connected with LED load 21, LED load 22, so that the electric current based on those sampling resistors and resistance are calculated the voltage of each LED load of flowing through, and voltage based on each LED load generates each load voltage sampled signal, and each load voltage sampled signal will be sent to described control unit 14.
Described the second power supply unit 12 comprises: the second power supply unit 122, the second controlled switch unit 121, the second sampling unit 126.Preferably, described the second controlled switch unit 121 comprises power switch pipe, more preferably, includes but not limited to controlled switch transistor.
Described the second power supply 12 is for providing load voltage to the 2nd LED load.Particularly, as shown in Figure 2, described the second power supply unit 12 also comprises the second Electro Magnetic Compatibility filter 123, step-up/step-down circuit 124 and current rectifying and wave filtering circuit 125.
Particularly, described the second power supply 122 is connected with the second electromagnetic compatibility mode filter 123, so that the constant-current supply of stable output; The input of described step-down/up type circuit 124 is connected in the first output of described electromagnetic compatibility mode filter 113; The output of described step-down/up type circuit 124 is connected with the input of described the second current rectifying and wave filtering circuit 125; The output of described current rectifying and wave filtering circuit 115 is connected in LED load 23, to provide load voltage to described LED load 23; Meanwhile, described the second controlled switch unit 121 source electrodes are connected with the output of described step-down/up type circuit 124; The grid of described the second controlled switch unit 121 is connected in described control unit 14; The drain electrode of described the second controlled switch unit 121 is connected with the second output of described the second electromagnetic compatibility mode filter 123; Meanwhile, described the second collecting unit 126 is connected to described the second controlled switch unit 121 drain electrode and LED loads 23.Preferably, the direct voltage scope that described step-up/step-down circuit 124 can provide is between 0v to 60v.
Described the second sampling unit 126 is sampled for the load voltage signal of the voltage signal to described the second controlled switch unit 121 and described LED load 23.Described load voltage signal includes but not limited to: current current signal, the overvoltage signal of LED load 23 etc. of voltage signal, LED load 23 that LED load 23 is current.Preferably, as shown in Figure 2, described the second sampling unit 126 comprises the second no-voltage sample circuit 151, the second overvoltage sample circuit 152, second voltage sample circuit 153.
Described the second no-voltage sample circuit 151 is for sampling to the zero passage voltage of described the second controlled switch unit 121 and sampled zero passage voltage sampled signal being sent to described control unit 14.
It should be noted that, those skilled in the art should understand that described second voltage sample circuit is sampled to the zero passage voltage of the second controlled switch unit and sampled zero passage voltage sampled signal is sent to the mode of described control unit and above-mentioned the first no-voltage sample circuit is sampled to the zero passage voltage of the first controlled switch unit and it is same or similar that sampled zero passage voltage sampled signal is sent to the mode of described control unit, be not described in detail in this.
Described the second overvoltage sample circuit 152 is for sampling to the overvoltage signal of described the 2nd LED load and sampled overvoltage sampled signal being sent to described control unit 14.
It should be noted that, those skilled in the art should understand that described the second overvoltage sample circuit 152 is sampled to the overvoltage signal of described LED load 23 and sampled overvoltage sampled signal is sent to the mode of described control unit 14 and above-mentioned the first overvoltage sample circuit 132 is sampled to the overvoltage signal of described LED load 21, LED load 22 and it is same or similar that sampled overvoltage sampled signal is sent to the mode of described control unit xx, be not described in detail in this.
Described second voltage sample circuit 153 is for sampling and sampled load voltage sampled signal is sent to described control unit 14 the current load voltage of described LED load 23.
It should be noted that, those skilled in the art should understand that described second voltage sample circuit 153 is sampled to the current load voltage of described LED load 23 and sampled load voltage sampled signal is sent to the mode of described control unit 14 and above-mentioned the first voltage sampling circuit 133 is sampled to the load voltage of described LED load 21, LED load 22 and it is same or similar that sampled load voltage sampled signal is sent to the mode of described control unit 14, be not described in detail in this.
Described control unit 14 is exported for controlling described the first constant cell 117 regulating load voltages for the sampled result based on described the first sampling unit 116, to realize the balanced signal of the constant current control to a LED load, and supply described the first controlled switch unit 111 of adjustment control to open and close the first switch controlling signal of frequency; And export for adjusting and control described the second controlled switch unit 121 and open and close the second switch control signal of frequency for the sampled result based on described the second sampling unit 126.Described control unit 14 be a kind of can be according to the program of prior storage, automatically, carry out at high speed the modernization intelligent electronic device of numerical computations, its hardware includes but not limited to microprocessor, FPGA (field programmable gate array), embedded device etc., preferably, described control unit 14 comprises DSP (digital signal processor).
Particularly, when the power supply signal of the LED load gathering when described the first sampling unit 116 comprises the current magnitude of voltage of each LED load, the rated voltage of described control unit 14 based on the current magnitude of voltage of each LED load and each LED load self relatively carry out to determine balanced signal; When the power supply signal of each the LED load gathering when described sampling unit 116 comprises the current current value of each LED load, the ratio of the rated resistance of described control unit 14 based on the current current value of each LED load and each LED load self calculates the current magnitude of voltage of each LED load, then rated voltage based on the current magnitude of voltage of described each LED load and each LED load self relatively carry out to determine balanced signal etc.For example, when the current magnitude of voltage of LED load 21 is during lower than the rated voltage of LED load 21 self, described control unit 14 outputs reduce to be serially connected in the balanced signal of the controlled variable resistance in LED load 21 loops; Again for example, when the current current value of LED load 22 is during higher than the rated voltage of LED load 22 self and the ratio of resistance, described control unit 14 outputs disconnect the balanced signal that is attempted by the first controlled switch unit 111 in LED load 22 loops, wherein, this the first controlled switch unit 111 is connected in series with a resistance, make thus the all-in resistance in LED load 22 loops increase, and then reduce the electric current in LED load 22 loops, to realize the constant current control to LED load 22.
Have again, in the time that the voltage signal of the first controlled switch unit 111 that described the first sampling unit 116 gathers is " 0 ", described control unit 14 is based on the described no-voltage pulse width modulation cycle counter that resets, then exports and control the switch controlling signal that described the first controlled switch unit 111 opens and closes based on the pulse width modulation cycle counter of counting again; In the time that the voltage signal of the first controlled switch unit 111 that described the first sampling unit 116 gathers is non-" 0 ", described control unit 14 is exported the switch controlling signal that described the first controlled switch unit 111 is disconnected based on described non-zero voltage.So, realize the first variable frequency control of controlled switch unit 111 to DC/DC conversion.
Also have, in the time that described the first sampling unit 116 collects the overvoltage sampled signal of LED load 22, described control unit 14 is exported the switch controlling signal that described the first controlled switch unit 111 is disconnected, so that the adjusting of the switching frequency of the controlled switch unit 111 based on in described the first power supply unit 11 reduces the voltage that exports this LED load 22 to.So, further control the first frequency of controlled switch unit 111 to DC/DC conversion.
It should be noted that, those skilled in the art should understand that, the zero passage voltage sampled signal of the second controlled switch unit 121 that described control unit 14 gathers based on the second sampling unit 126 and overvoltage sampled signal are exported for controlling described the second controlled switch unit and are opened 121 modes of second switch control signal of closing the variable frequency control that realizes DC/DC conversion and the zero passage voltage sampled signal of the second controlled switch unit 111 that described control unit 14 gathers based on the first sampling unit 116 and overvoltage sampled signal and export that to open and close the mode of second switch control signal of the variable frequency control that realizes DC/DC conversion same or similar for controlling described the first controlled switch unit 111, be not described in detail in this.
In addition, in the time that described the second sampling unit 126 collects the current voltage sampling signal of LED load 23 lower than the rated voltage of described LED load 23, the duty of described control unit 14 based on changing pulse width modulation cycle recently exported the switch controlling signal of the switching frequency of controlling described the second controlled switch unit 121, to improve the voltage of LED load 23, so that the power supply of LED load 23 is constant.
Described automobile is as follows by the working method of the driving control system 1 of many LED load:
First, the first power supply 112 of described the first power supply unit 11 is exported stabilized power source through the first Electro Magnetic Compatibility filter 113, described flyback transformer 114 opens and closes to export predetermined alternating voltage based on the first controlled switch unit 111 with preset frequency, described predetermined alternating voltage is exported predetermined direct current voltage through the first current rectifying and wave filtering circuit 115, described the first current rectifying and wave filtering circuit 115 is connected with load 21 and load 22 through the first constant cell 117, in order to export constant current to LED load 21 and LED load 22; Simultaneously, a predetermined alternating voltage is exported in the switching of the described step-down/up type circuit 121 of described the second power supply unit 12 based on the second controlled switch unit 121, described predetermined alternating voltage is exported predetermined direct current voltage through the second current rectifying and wave filtering circuit 125, and described predetermined direct current voltage provides stabilized power source to LED load 23.
Then, when LED load 22 by bright light when turning off the light, the first balance Acquisition Circuit 133 in the first sampling unit 116 gathers LED load 21, the power supply sampled signal that LED load 22 is current, no-voltage sample circuit 131 in the first sampling unit 116 gathers the no-voltage sampled signal of the first controlled switch unit 111, the first sampling unit 116 first overvoltage sample circuits 132 gather the overvoltage sampled signal of LED load 21, the real-time sampled result that obtains thus, and described sampled result is transported to described control unit 14, the described control unit 14 on the one hand overvoltage sampled signal of the no-voltage sampled signal based on the first controlled switch unit 111 and LED load 21 is exported the switch controlling signal of the switching of controlling described the first controlled switch unit 111, to adjust in real time the load voltage of LED load 21, on the other hand based on LED load 21, the current voltage sampling signal of LED load 22 is exported and is controlled described LED load 21, balanced signal to the first constant cell 117 of LED load 22, so that the first constant cell 117 is adjusted the electric current of exporting to LED load 21 in real time, further to guarantee providing stabilized power supply to LED load 21.
When LED load 23 by bright when dark, second voltage sample circuit 153 in the second power supply unit 11 gathers the current power supply sampled signal of LED load 23, the second no-voltage sample circuit 151 gathers the no-voltage sampled signal of the second controlled switch unit 121, the second overvoltage sample circuit 152 gathers the overvoltage sampled signal of LED load 23, the real-time sampled result that obtains thus, and sampled result is transported to described control unit 14, the no-voltage sampled signal of described control unit 14 based on the second controlled switch unit 121, the overvoltage sampled signal of LED load 23 and the current voltage sampling signal of LED load 23 are exported the switch controlling signal of the switching of controlling described the second controlled switch unit 121, to adjust in real time the load voltage of LED load 23, make thus step-down/up type circuit that burning voltage can be provided within the scope of 0v-60v.
In sum, automobile of the present invention can be controlled separately based on sampled result the switching of the controlled switch unit in the first power supply unit and the second power supply unit with the control unit in the driving control system of many LED load, to adjust in real time the output voltage of power supply unit, guarantee the stable of each load voltage, especially, duty based on changing pulse-modulated signal is recently adjusted the frequency of the first controlled switch unit and the second controlled switch unit, and adjust load that output current can make different capacity electric current separately based on the first constant cell and keep constant, effectively control actual loading power deviation within 1w, greatly improve the stability of load running.
In addition, utilize control unit to process voltage signal and power supply signal that each sampling unit gathers, can shorten the feedback time of signal, improve the operating efficiency of whole driving control system, meanwhile, the responding to switch control signal that controlled switch unit employing field effect transistor can be sensitiveer.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (9)
1. a driving control system for many LED load for automobile, is characterized in that, described automobile at least comprises with the driving control system of many LED load:
The first power supply unit, for providing load voltage to a LED load; Described the first power supply unit comprises:
The first power supply;
The first controlled switch unit, is connected with described the first power supply; The switching of described the first power supply based on described the first controlled switch unit provides the first direct voltage to a LED load;
The first constant cell, is connected with the each LED load in described the first controlled switch unit and a described LED load, for described the first direct voltage being converted to the load voltage of each described LED load;
The first sampling unit, is connected with described the first controlled switch unit and described the first constant cell, samples for the load voltage signal of each LED load of the voltage signal to described the first controlled switch unit and a LED load;
The second power supply unit, for providing load voltage to the 2nd LED load; Described the second power supply unit comprises:
The second power supply;
The second controlled switch unit, is connected with described the second power supply; The switching of described the second power supply based on described the second controlled switch unit provides load voltage to the 2nd LED load;
The second sampling unit, is connected with described the second controlled switch unit and described the 2nd LED load, samples for the load voltage signal of the voltage signal to described the second controlled switch unit and described the 2nd LED load;
Control unit, be connected with described the first sampling unit, described the first constant cell and the first controlled switch unit, export for controlling described the first constant cell regulating load voltage for the sampled result based on described the first sampling unit, to realize the first balanced signal of the constant current control to the each LED load in a LED load, and for adjusting the first switch controlling signal of controlling described the first controlled switch unit open/close frequency; And be connected with the second controlled switch unit with described the second sampling unit, export the second switch control signal of controlling described the second controlled switch unit open/close frequency for adjusting for the sampled result based on described the second sampling unit;
Described the first sampling unit comprises:
The first no-voltage sample circuit, be connected with the transistorized drain electrode of described the first controlled switch and described control unit, for the zero passage voltage of described the first controlled switch unit being sampled and sampled zero passage voltage sampled signal being sent to described control unit;
The first overvoltage sample circuit, is connected with output and the described control unit of described the first current rectifying and wave filtering circuit, for the overvoltage signal of a described LED load being sampled and sampled overvoltage sampled signal being sent to described control unit; Described control unit is exported for controlling described the first controlled switch unit open/close to realize first switch controlling signal of variable frequency control of DC/DC conversion according to described zero passage voltage sampled signal and described overvoltage sampled signal;
The first voltage sampling circuit, is connected with described the first constant cell and described control unit, for the current load voltage of a described LED load is sampled and sampled load voltage sampled signal is sent to described control unit; Described control unit is exported for controlling described the first constant cell regulating load voltage to realize the first balanced signal of the constant current control to a LED load according to described load voltage sampled signal.
2. the driving control system of many LED load for automobile according to claim 1, is characterized in that: described the first power supply unit also comprises: the first Electro Magnetic Compatibility filter of being connected with the first power supply, be connected the flyback transformer of described the first Electro Magnetic Compatibility filter output and connect the first current rectifying and wave filtering circuit of described flyback transformer secondary coil; Described the first constant cell is connected with the output of described the first current rectifying and wave filtering circuit.
3. the driving control system of many LED load for automobile according to claim 2, it is characterized in that: described the first controlled switch unit is controlled switch transistor, its grid is connected with described control unit, source electrode is connected with the primary coil of flyback transformer, and drain electrode is connected with the first Electro Magnetic Compatibility filter.
4. the driving control system of many LED load for automobile according to claim 2, is characterized in that: it is the flyback transformer of 30W that described flyback transformer employing can provide maximum rated power output.
5. the driving control system of many LED load for automobile according to claim 1, is characterized in that: described the second power supply unit also comprises: the second Electro Magnetic Compatibility filter, the step-up/step-down circuit that is connected described the second Electro Magnetic Compatibility filter output being connected with the second power supply, the second current rectifying and wave filtering circuit that connects described step-up/step-down circuit output; Described the second constant cell is connected with the output of described the second current rectifying and wave filtering circuit.
6. the driving control system of many LED load for automobile according to claim 5, it is characterized in that: described the second controlled switch unit is controlled switch transistor, its grid is connected with described control unit, source electrode is connected with described step-up/step-down circuit output, and drain electrode is connected with the second Electro Magnetic Compatibility filter.
7. the driving control system of many LED load for automobile according to claim 6, is characterized in that: described the second sampling unit comprises:
The second no-voltage sample circuit, is connected with drain electrode and the described control unit of described the second control switching transistor, for the zero passage voltage of described the second controlled switch unit being sampled and sampled zero passage voltage sampled signal being sent to described control unit;
The second overvoltage sample circuit, is connected with output and the described control unit of described the second current rectifying and wave filtering circuit, for the overvoltage signal of described the 2nd LED load being sampled and sampled overvoltage sampled signal being sent to described control unit;
Second voltage sample circuit, is connected with described the 2nd LED load and described control unit, for the current load voltage of described the 2nd LED load is sampled and sampled load voltage sampled signal is sent to described control unit; Described control unit is exported for controlling described the second controlled switch unit open/close to realize the second switch control signal of variable frequency control of DC/DC conversion according to described zero passage voltage sampled signal, described overvoltage sampled signal and described voltage sampling signal.
8. the driving control system of many LED load for automobile according to claim 5, is characterized in that: the direct voltage scope that described step-up/step-down circuit can provide is between 0v to 60v.
9. the driving control system of many LED load for automobile according to claim 1, is characterized in that: a described LED load comprises asymmetric LED load.
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| CN201210081259.4A CN102612232B (en) | 2012-03-23 | 2012-03-23 | Driving control system with multiple LED (light emitting diode) loads for automobile |
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| CN201210081259.4A CN102612232B (en) | 2012-03-23 | 2012-03-23 | Driving control system with multiple LED (light emitting diode) loads for automobile |
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| CN103683399A (en) * | 2013-11-29 | 2014-03-26 | 小米科技有限责任公司 | Charge management chip and control method |
| WO2015144457A1 (en) * | 2014-03-24 | 2015-10-01 | Koninklijke Philips N.V. | Power-over-ethernet power distribution system |
| CN104968110B (en) * | 2015-07-06 | 2017-10-20 | 湖南工业大学 | A kind of method of the multiple Lamp with ceiling fan of far distance controlled |
| CN108966459B (en) * | 2018-07-27 | 2023-09-12 | 深圳市明微电子股份有限公司 | Intelligent dimming control circuit and system |
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| CN101521971A (en) * | 2009-03-31 | 2009-09-02 | 上海小糸车灯有限公司 | Linear constant current drive mode of LED signal lamp for automobile |
| CN201830527U (en) * | 2010-10-30 | 2011-05-11 | 陈金明 | High-power LED (light emitting diode) driving power supply |
| CN202524608U (en) * | 2012-03-23 | 2012-11-07 | 上海信耀电子有限公司 | A driving control system of multiple LED loads for an automobile |
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2012
- 2012-03-23 CN CN201210081259.4A patent/CN102612232B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521971A (en) * | 2009-03-31 | 2009-09-02 | 上海小糸车灯有限公司 | Linear constant current drive mode of LED signal lamp for automobile |
| CN201830527U (en) * | 2010-10-30 | 2011-05-11 | 陈金明 | High-power LED (light emitting diode) driving power supply |
| CN202524608U (en) * | 2012-03-23 | 2012-11-07 | 上海信耀电子有限公司 | A driving control system of multiple LED loads for an automobile |
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| CN102612232A (en) | 2012-07-25 |
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