CN206542595U - A kind of LED driving control systems - Google Patents
A kind of LED driving control systems Download PDFInfo
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- CN206542595U CN206542595U CN201720113292.9U CN201720113292U CN206542595U CN 206542595 U CN206542595 U CN 206542595U CN 201720113292 U CN201720113292 U CN 201720113292U CN 206542595 U CN206542595 U CN 206542595U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model discloses a kind of LED driving control systems, including power module, LED module and drive module.Drive module includes chip controls unit and discrete component control unit；As an improvement, drive module also includes over-temperature protection unit.When power module is connected, chip controls unit sends the first control signal to discrete component control unit, makes discrete component control unit drive all LEDs to light；In LED module short circuit or open circuit, chip controls unit sends the second control signal to discrete component control unit, extinguishes all LEDs；When the voltage that chip controls unit detects over-temperature protection unit exceedes setting value, send the second control signal to discrete component control unit and extinguish all LEDs.The utility model realizes the functions such as LED multi-path module drive, LED failure diagnosis and overheat protector by the way of one single chip and discrete component are combined, simple in construction, effectively reduces cost.
Description
Technical field
The utility model is related to LED Drive Control Techniques field, especially a kind of drive control for automobile lamp LED
System.
Background technology
Current automobile industry dog-eat-dog, cost pressure increasingly increases, and profit drops again and again while sales achievement increases
It is low.Reason is that market is being improved constantly for the functional requirement of automobile electronics, pursues the magnificent changeable and performance of moulding
It is reliable and stable so that cost of parts increases, while car fare is constantly dropping, artificial designs and develops expense again in rise
Trend, the development core for being bound to later is pursuit cost performance, that is, constantly reduces cost while meeting moulding with performance.
And LED car lamp is indubitable as following development trend.Application main at present includes full LED taillights, LED
Steering indicating light, LED indoor lamp, LED front fog lamp, LED atmosphere lamps and part LED headlamp.Wherein full LED taillights include rear position
Lamp, steering indicating light, Brake lamp, back-up lamp and Rear Fog Lamp.And taillight often runs into changeable LED as the key position of moulding
Number, this just brings difficulty to the design driven every time, construction cycle length and manpower and materials cost is high.
The main performance requirements of taillight include the drive control of plurality of LEDs, particularly position, Brake lamp start-up and shut-down control；Electricity
The overheat protector function on road；LED failure diagnosis and closing function；Sometimes also overvoltage protection with circuit etc. is required.For
The market demand, each electronic component supplier also designed and developed many money chips be intended to taillight driving design offer convenience,
Such as the TLS2314 of Infineon, the driving of three tunnels can be exported, per road maximum 120mA, single channel electric current can be adjusted individually, and be carried
The diagnosis detection of overvoltage protection, overheat protector and LED failure.But the chip cost is higher, such as taillight position lamp has 20 LEDs
When be accomplished by four chips.And the TPS92638 that TI is designed and developed, the driving of eight tunnels can be exported, per road maximum 70mA, the electricity per road
Stream is identical, the diagnosis detection with overheat protector and LED failure.The brand chip cost is slightly lower, but needs holding per road electric current
Unanimously, as taillight position lamp to be according to the different luminous flux of shape-designing will be highly difficult.And the common issue of current driving chip
It is due to that volumetric constraint power can not all accomplish too big, thus driving force is weaker, when such as doing taillight Brake lamp, an often core
Piece can only be with 2-4 LEDs, and cost is very high.And when being designed completely using discrete component, due to the requirement of the diagnosis of LED failure, inspection
Survey and switching mechanism will allow circuit network complex, and failure risk is also increased while element various increase production difficulty.
Utility model content
In order to overcome in the prior art individually use chip drives design cost height, difficult design and use discrete member completely
Part sets the problem of timing circuit is complicated, and the utility model provides a kind of LED driving control systems, using one single chip and discrete
The mode that element is combined realizes automobile lamp LED drive control, is realizing the work(such as overheat protector, LED failure diagnosis and closing
While energy, cost is effectively reduced, simplifies circuit.
The utility model design is：
The utility model is a kind of LED driving control systems, including power module, LED module and drive module.Power supply mould
Block is used to power to LED module and drive module；Drive module includes chip controls unit and discrete component control unit.In electricity
When source module is connected, chip controls unit sends the first control signal to discrete component control unit so that discrete component is controlled
Unit driving LED module work.When power module is powered off or when LED module short circuit or open circuit, chip controls unit is to discrete
Element controi unit sends the second control signal so that LED module is stopped.
Above-mentioned LED module is in series by 2-3 LED lamps, and the quantity of LED module is 1-8 roads, above-mentioned discrete component control
The quantity of unit is equal with the quantity of LED module.
As an improvement, drive module may also include over-temperature protection unit, the change of environment temperature is sensed, when chip controls list
When the voltage that member detects over-temperature protection unit exceedes the setting value of chip controls unit, the is sent to discrete component control unit
Two control signals cause LED module to be stopped.
A kind of beneficial effect of LED driving control systems of the utility model is：First, using one single chip and discrete component
With reference to mode replace in the prior art using multiple chips type of drive or completely using discrete component driving by the way of come
Systemic-function is realized, it is simple in construction, effectively reduce cost.Secondly, one single chip and discrete component are shared out the work and helped one another, LED module by
Discrete component drive, the electric current of LED module is adjustable, and discrete component control unit switch by one single chip control, one
Chip achieves that the monitoring to the LED state in multiple LED modules, that is, realizes to LED failure diagnosis and overheat protector etc.
Function.
In a word, circuit structure of the present utility model is simple, reduces the difficulty designed and developed, greatly reduces and research and develop into
This.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the theory diagram of LED driving control systems of the present utility model；
Fig. 2 is the theory diagram of drive module of the present utility model；
Fig. 3 is the circuit connection diagram of LED driving control systems of the present utility model；
Fig. 4 is partial enlarged drawing at A in Fig. 3.
Wherein：Power module 1, LED module 2, drive module 3, discrete component control unit 31, chip controls unit 32,
Over-temperature protection unit 33.
Embodiment
Fig. 1 is the theory diagram of the utility model LED driving control systems.As shown in figure 1, LED driving control system bags
Include power module 1, LED module 2 and drive module 3.Wherein, drive module 3 includes discrete component control unit 31 and chip control
Unit 32 processed, power module 1 is powered to the chip controls unit 32 in LED module 2 and drive module 3.
When power module 1 is connected, chip controls unit 32 is by control signal BASE ends to discrete component control unit
31 send the first control signal so that discrete component control unit 31 works, so as to drive LED module 2 to work.
When LED module 2 has LED short-circuit, chip controls unit 32 detects discrete component control by short-circuit signal SC ends
The voltage change of unit 31 processed is more than the setting value of chip controls unit, is controlled by control signal BASE ends to discrete component single
Member 31 sends the second control signal so that all LED are stopped.When certain paths of LEDs module 2 has LED breaking, chip controls list
The electric current that member 32 detects discrete component control unit 31 by current feedback signal FB ends is zero, passes through control signal BASE ends
The second control signal is sent to discrete component control unit 31 so that all LED are stopped.When power module 1 is powered off, core
Piece control unit 32 sends the second control signal to discrete component control unit 31 so that all LED are stopped.
LED driving control systems may also include over-temperature protection unit 33, when chip controls unit 32 detects overheat protector
When the voltage of unit 33 exceedes setting value, chip controls unit 32 sends the second control signal to discrete component control unit 31 to be made
LED module is obtained to be stopped.
Fig. 2 is a kind of a kind of schematic diagram of embodiment of LED driving control systems of the utility model.As shown in Fig. 2 having
8 paths of LEDs modules 2, are in series per paths of LEDs module 2 by 3 LEDs；Drive module includes 8 road discrete component control units 31
With 1 chip controls unit 32；1 paths of LEDs module 2 is driven to work per road discrete component control unit 31, per road discrete component control
Unit 31 processed, as main driving element, drives corresponding LED module 2 using a NPN triode；Chip controls unit 32 is adopted
It is controlled, is drawn by short-circuit signal SC ends, control signal BASE ends and three, current feedback signal FB ends with chip NCV7691
Jiao Yumei roads discrete component control unit 31 is connected, and is realized and is lighted and extinguish per LED in paths of LEDs module 2, monitors LED
State, realize the functions such as the diagnosis of LED failure.
Fig. 3 is a kind of circuit diagram of the embodiment of LED driving control systems of the utility model.As shown in figure 3, by 8 tunnels
Discrete component control unit drives 8 paths of LEDs modules respectively, is in series per paths of LEDs module by 2 or 3 LEDs；Chip control
Unit processed is NCV7691 chips, including power supply signal VS ends, short-circuit signal SC ends, current feedback signal FB ends, control signal
BASE ends, NTC inputs.1 NCV7691 chip passes through short-circuit signal SC ends, current feedback signal FB ends, control signal BASE
End is detected and controlled to 8 road discrete component control units, realizes 8 road discrete component control units in 8 paths of LEDs modules
The condition monitoring of LED.
From figure 3, it can be seen that element composition and annexation each other per road discrete component control unit are all
It is identical, illustrate to drive in LED driving control systems below so that 1 road discrete component control unit drives the work of 1 paths of LEDs module as an example
Annexation and operation principle between moving cell and LED module.
Fig. 4 is partial enlarged drawing at A in Fig. 3, illustrates 1 road discrete component control unit driving in Fig. 3 with Fig. 4 below
Annexation and operation principle between 1 paths of LEDs module.
As shown in figure 4, in discrete component control unit, the colelctor electrode of NPN triode Q1 is connected with LED module, the end
It is connected simultaneously with diode D3 anode, electric capacity C3 one end, electric capacity C3 other end ground connection, diode D3 negative electrode is by electricity
Resistance R2 is connected with the short-circuit signal SC ends of NCV7691 chips, and NPN triodes Q1 emitter stage is grounded by resistance R9, resistance R5
One end connects NPN triodes Q1 emitter stage and resistance R9 one end simultaneously, the resistance R5 other end simultaneously with NCV7691 chips
Current feedback signal FB ends be connected with electric capacity C8 one end, electric capacity C8 other end ground connection, NPN triodes Q1 base stage is simultaneously
Connect resistance R4 one end and NPN triode Q5 base stage, the resistance R4 other end and the control signal BASE of NCV7691 chips
End connection, NPN triode Q5 emitter stage is grounded through electric capacity C9, NPN triode Q5 grounded collector, NCV7691 chips
GND ends are grounded.
The operation principle of LED driving control systems is：When power module VS is powered, the control signal of NCV7691 chips
BASE ends export base stage of first control signal to NPN triode Q1, wherein the first control signal is high level signal, now
NPN triode is turned on, and the LED in driving LED module is lighted.When there is LED short-circuit in LED module, NCV7691 chips lead to
Cross short-circuit signal SC ends and detect the voltage change of discrete component control unit more than the scope that NCV7691 chips are set,
The control signal BASE ends of NCV7691 chips will export base stage of second control signal to NPN triode Q1, the second control signal
For low level signal, all LEDs are extinguished in NPN triode Q1 cut-off.When there is LED breaking in LED module, NCV7691 cores
The electric current that the current feedback signal FB ends of piece will detect the NPN triodes Q1 of discrete component control unit emitter stage is zero,
The control signal BASE ends of NCV7691 chips will export the second control signal, and second control signal is low level signal, NPN
Triode ends, and extinguishes all LEDs.
As an improvement, over-temperature protection unit is also included in drive module.It is over-temperature protection unit at B in Fig. 4.
In over-temperature protection unit, resistance R13 is in parallel with thermistor PTC1, resistance R13 one end simultaneously with resistance R16
One end and NCV7691 chips NTC inputs connection, resistance R16 the other end ground connection, resistance R13 the other end connection electricity
R15 one end is hindered, the resistance R15 other end is connected with resistance R14 one end and voltage-regulator diode D7 negative pole simultaneously, voltage stabilizing two
Pole pipe D7 plus earth, the resistance R14 other end is connected with power module VS.
The operation principle of over-temperature protection unit is in LED driving control systems：Thermistor PTC1 sensing environment temperatures
Change, when the temperature increases, the reduction of its resistance, the voltage of the NTC inputs of NCV7691 chips is in increase, when the value exceedes
During the scope of NCV7691 chips setting, the control signal BASE ends of NCV7691 chips export the second control signal, second control
Signal processed is low level signal, extinguishes all LEDs.
It should be appreciated that specific embodiment described above is only used for explaining the utility model, it is not used to limit this reality
With new.The obvious changes or variations extended out by the bright spirit of the utility model is protected still in of the present utility model
Protect among scope.
Claims (6)
1. a kind of LED driving control systems, it is characterised in that including：
Power module (1), for LED module (2) and drive module (3) power supply；
LED module (2), work is driven by drive module (3), and the LED module (2) is in series by plurality of LEDs lamp；
Drive module (3), the drive module (3) includes discrete component control unit (31) and chip controls unit (32), just
Often during work, the chip controls unit (32) sends the first control signal to the discrete component control unit (31), described
First control signal causes the discrete component control unit (31) to drive LED module (2) work, in the LED module
(2) during short-circuit or open circuit, the chip controls unit (32) sends the second control to the discrete component control unit (31) and believed
Number, the discrete component control unit (31) causes the LED module (2) to be stopped.
2. LED driving control systems according to claim 1, it is characterised in that the LED module (2) is by 2-3 LEDs
Lamp is in series, and the quantity of the LED module (2) is 1-8 roads, the quantity of the discrete component control unit (31) with it is described
The quantity of LED module (2) is equal.
3. LED driving control systems according to claim 2, it is characterised in that the drive module (3) also includes excess temperature
Protection location (33), when the voltage that the chip controls unit (32) detects the over-temperature protection unit (33) exceedes setting value
When, the chip controls unit (32) sends the second control signal so that the LED to the discrete component control unit (31)
Module (2) is stopped.
4. LED driving control systems according to claim 3, it is characterised in that the chip controls unit (32) includes
NCV7691 chips, the NCV7691 chips have power supply signal VS ends, short-circuit signal SC ends, current feedback signal FB ends, control
Signal BASE ends processed, NTC inputs and GND ends.
5. LED driving control systems according to claim 4, it is characterised in that the discrete component control unit (31)
In, the colelctor electrode of NPN triode Q1 is connected with the LED module (2), the end simultaneously with diode D3 anode, electric capacity C3
One end is connected, electric capacity C3 other end ground connection, and the negative electrode of the diode D3 is short by resistance R2 and the NCV7691 chips
Road signal SC ends are connected, and the emitter stage of the NPN triodes Q1 is grounded by resistance R9, and resistance R5 one end connects described simultaneously
NPN triodes Q1 emitter stage and resistance R9 one end, the electricity of the other end of the resistance R5 simultaneously with the NCV7691 chips
Stream feedback signal FB ends are connected with electric capacity C8 one end, electric capacity C8 other end ground connection, and the base stage of the NPN triodes Q1 is simultaneously
Connect resistance R4 one end and NPN triode Q5 base stage, the control signal of the resistance R4 other end and the NCV7691 chips
BASE ends are connected, and the emitter stage of the NPN triode Q5 is grounded through electric capacity C9, the grounded collector of the NPN triode Q5, institute
State the GND ends ground connection of NCV7691 chips.
6. LED driving control systems according to claim 4, it is characterised in that in the over-temperature protection unit (33),
Resistance R13 is in parallel with thermistor PTC1, one end of resistance R13 one end simultaneously with resistance R16 and the NCV7691 cores
The NTC inputs connection of piece, the other end ground connection of the resistance R16, the one of the other end connection resistance R15 of the resistance R13
End, the other end of the resistance R15 is connected with resistance R14 one end and voltage-regulator diode D7 negative pole simultaneously, the voltage stabilizing two
Pole pipe D7 plus earth, the other end of the resistance R14 is connected with power module (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720113292.9U CN206542595U (en) | 2017-02-07 | 2017-02-07 | A kind of LED driving control systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720113292.9U CN206542595U (en) | 2017-02-07 | 2017-02-07 | A kind of LED driving control systems |
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| CN206542595U true CN206542595U (en) | 2017-10-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401312A (en) * | 2017-02-07 | 2018-08-14 | 常州星宇车灯股份有限公司 | A kind of LED driving control systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108401312A (en) * | 2017-02-07 | 2018-08-14 | 常州星宇车灯股份有限公司 | A kind of LED driving control systems |
| CN108401312B (en) * | 2017-02-07 | 2024-03-26 | 常州星宇车灯股份有限公司 | LED drive control system |
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