CN112824149A - TLD 5097-based multifunctional high-low beam driver and driving method - Google Patents
TLD 5097-based multifunctional high-low beam driver and driving method Download PDFInfo
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- CN112824149A CN112824149A CN201911142831.1A CN201911142831A CN112824149A CN 112824149 A CN112824149 A CN 112824149A CN 201911142831 A CN201911142831 A CN 201911142831A CN 112824149 A CN112824149 A CN 112824149A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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Abstract
The invention relates to an electronic device for an automobile, in particular to a TLD 5097-based multifunctional high-low beam driver and a driving method, and the multifunctional high-low beam driver comprises a BCM module, a control module, a low beam feedback module, a low beam driving module, a low beam lamp panel, a high beam driving module and a high beam lamp panel, wherein the BCM module is electrically connected with the control module, the control module is electrically connected with the low beam feedback module through the low beam driving module, the low beam feedback module is electrically connected with the control module, the low beam driving module is also electrically connected with the low beam lamp panel, and the control module is also electrically connected with the high beam lamp panel through the high beam driving module; by adopting the TLD5097 driving chip, constant-current driving, analog dimming and digital dimming functions are supported, overvoltage protection and open-circuit diagnosis can be realized, high-power driving and high-efficiency circuits can be realized; meanwhile, the far and near lights adopt the same control module to realize the functions of over-temperature protection, linear current reduction, fault feedback, welcome mode and the like.
Description
Technical Field
The invention relates to an electronic device for an automobile, in particular to a TLD 5097-based multifunctional high-beam and low-beam driver and a driving method.
Background
With the progress of times, the development of science and technology and the common application of the LED, more and more automobile lamps adopt the LED as a light source, and particularly, the application of the LED on the aspect of tail lamps is very wide. In addition, due to the fact that the power of the linear circuit is large, the use efficiency of the traditional linear circuit design is extremely low, and in order to improve the efficiency, the circuit design basically adopts a DC-DC driving mode. However, since the driving of the high beam and low beam functions is a separate control module, the cost of the components is too high, which brings great obstruction to the use of the LED light source in the high beam and low beam functions.
Disclosure of Invention
In order to solve the control problem that the high beam and the low beam of the automobile headlamp in the prior art are different, the invention provides a multifunctional high-low beam driver based on TLD5097 and a driving method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a multi-functional distance and near light driver based on TLD57, includes BCM module, control module, short-distance beam feedback module, short-distance beam drive module, short-distance beam lamp plate, distance light drive module and distance light lamp plate, the BCM module is connected with the control module electricity, control module is connected with short-distance beam feedback module electricity through short-distance beam drive module, short-distance beam feedback module is connected with the control module electricity, short-distance beam drive module still is connected with short-distance beam lamp plate electricity, control module still is connected with distance light lamp plate electricity through distance light drive module.
Preferably, the vehicle headlamp further comprises a fault diagnosis module, and the low beam feedback module is electrically connected with the control module, specifically, the low beam feedback module is electrically connected with the control module through the fault diagnosis module.
Preferably, the low beam driving module and the high beam driving module are chips TLD57 from infineon corporation.
Preferably, the control module is a KEA8 singlechip.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multifunctional high-low beam driving method based on TLD57 comprises the following steps: the method comprises the following steps: waiting for the input signal to be detected;
step two: judging whether the signal is a welcome signal or not, and if the signal is the welcome signal, executing the welcome function and feeding back;
step three: if the signal is not a welcome signal, judging whether the signal is a near light signal, if the signal is the near light signal, executing a near light function and continuously judging whether a fault exists, if the fault exists, closing the near light function, if the fault does not exist, judging whether the temperature exceeds a threshold value, if the temperature does not exceed the threshold value, feeding back, and if the temperature exceeds the threshold value, performing linear flow reduction;
step four: if the signal is not the welcome signal, judging whether the signal is a near light signal, if the signal is not the near light signal, judging whether the signal is a high beam signal, and if the signal is not the high beam signal, performing feedback; if the signal is a high beam signal, executing a high beam function, continuously judging whether the temperature exceeds a threshold value, and if the temperature does not exceed the threshold value, performing feedback; and if the threshold value is exceeded, executing linear down flow.
The invention achieves the following beneficial effects: according to the multifunctional far and near light driver based on the TLD5097 and the driving method, the TLD5097 driving chip is adopted, the functions of constant current driving, analog dimming and digital dimming are supported, overvoltage protection and open circuit diagnosis can be realized, high-power driving can be realized, and a circuit is high in efficiency; meanwhile, the far and near lights adopt the same control module to realize the functions of over-temperature protection, linear current reduction, fault feedback, welcome mode and the like.
Drawings
FIG. 1 is a circuit block diagram of a TLD 5097-based multifunctional high-low beam driver of the present invention;
fig. 2 is a control flow chart of the multifunctional far and near light driver based on TLD5097 of the present invention.
Description of the drawings: 1. BCM module, 2, control module, 3, passing beam feedback module, 4, passing beam drive module, 5, high beam drive module, 6, passing beam lamp plate, 7, high beam lamp plate, 8, failure diagnosis module.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A multifunctional high-low beam driver based on TLD57 comprises a BCM module 1, a control module 2, a low beam feedback module 3, a low beam driving module 4, a low beam lamp panel 6, a high beam driving module 5 and a high beam lamp panel 7, wherein the BCM module 1 is electrically connected with the control module 2, the control module 2 is electrically connected with the low beam feedback module 3 through the low beam driving module 4, the low beam feedback module 3 is electrically connected with the control module 2, the low beam driving module 4 is also electrically connected with the low beam lamp panel 6, and the control module 2 is also electrically connected with the high beam lamp panel 7 through the high beam driving module 5; the low-beam feedback module 3 is electrically connected with the control module 2, specifically, the low-beam feedback module 3 is electrically connected with the control module 2 through the fault diagnosis module 8; the low beam driving module 4 and the high beam driving module 5 are chips TLD57 of infineon company; the control module 2 is a KEA8 single-chip microcomputer.
A multifunctional high-low beam driving method based on TLD57 comprises the following steps: the method comprises the following steps: waiting for the input signal to be detected;
step two: judging whether the signal is a welcome signal or not, and if the signal is the welcome signal, executing the welcome function and feeding back;
step three: if the signal is not a welcome signal, judging whether the signal is a near light signal, if the signal is the near light signal, executing a near light function and continuously judging whether a fault exists, if the fault exists, closing the near light function, if the fault does not exist, judging whether the temperature exceeds a threshold value, if the temperature does not exceed the threshold value, feeding back, and if the temperature exceeds the threshold value, performing linear flow reduction;
step four: if the signal is not the welcome signal, judging whether the signal is a near light signal, if the signal is not the near light signal, judging whether the signal is a high beam signal, and if the signal is not the high beam signal, performing feedback; if the signal is a high beam signal, executing a high beam function, continuously judging whether the temperature exceeds a threshold value, and if the temperature does not exceed the threshold value, performing feedback; and if the threshold value is exceeded, executing linear down flow.
As shown in fig. 1, the control module performs a responsive function based on the signal input by the BCM. When the BCM outputs signals, the control module of the driver executes functions of low beam, high beam, welcome guest and the like according to the signals. Meanwhile, the controller can detect the working states of the driving module and the temperature protection module of the lamp panel in real time. When the temperature reaches the threshold value of temperature protection, the control module performs linear current reduction by using a PWM digital dimming mode. Meanwhile, the control module feeds back the working condition of the dipped headlight to the BCM so as to diagnose the fault of the whole vehicle. The singlechip that this design adopted is the chip of freescale KEAZN8AMTG, compares in other singlechips, has advantages such as abundant, the cost is lower of resource. The LED driving chip of the design adopts TLD5097 to realize constant current driving, support analog dimming and digital dimming, and has the functions of open-circuit diagnosis, overvoltage protection and the like. The driver adopts a modular design, can realize multiple functions, and greatly increases the portability of the system.
And when the low beam is in operation, the low beam feedback module 3 detects the operating state of the low beam in real time and feeds the low beam back to the BCM through the control module 2. The short-distance beam feeds back a PWM wave of 10Hz when working normally, and feeds back a PWM wave of 5Hz when the short-distance beam module is in failure. When the low beam module does not work, the feedback is at a high level or a low level.
The control module adopts a timing and multi-acquisition mode when acquiring the temperature, and calculates the ADC value acquired for multiple times so as to determine the current temperature value; when the low beam module normally works, the feedback module detects whether the low beam LED works normally through the TLD5097 chip, and feeds back the low beam LED to the control module 2 in a voltage mode, and feeds back the current working state to the BCM in a PWM signal mode through the control module 2.
Passing light drive module 4 and passing light feedback module 3 link to each other with control module 2, and during normal operating, drive LED lamp plate under the PWM dimming signal of control module 2 output. Under the condition that the LED lamp panel is open-circuited, the short-distance light feedback module 3 feeds back the short-distance light to the control module 2 for further processing. The high beam driving module 5 is connected with the control module 2, and drives the high beam LED lamp panel under the PWM dimming signal output by the control module 2 when the high beam LED lamp panel normally works; passing light LED lamp plate 6 and high beam lamp plate 7 link to each other with respective drive module, and the LED lamp plate has NTC temperature resistance, and its resistance is the inverse ratio change along with the temperature. The MCU control module 2 carries out linear current reduction and temperature protection by collecting NTC voltage; the control module 2 has a low beam fault feedback function, the feedback form of the control module is presented by PWM waves, three working conditions of faults, normal faults and non-low beam faults can be distinguished, and the fault diagnosis of the whole vehicle is facilitated. The low beam fault diagnosis module 8 is connected with the low beam fault feedback module 3, and the low beam fault feedback module feeds back a signal input by an EN pin of the driving chip TLD5097 when the low beam normally works. When the low beam is in fault, the low beam fault feedback module feeds back a low level signal with pulse, and the low beam fault diagnosis module considers that the low beam is in fault when detecting the signal for ten times continuously.
The chips of the low beam driving module 4 and the high beam driving module 5 are TLD5097, which is a constant current driving chip, and supports analog and digital dimming, and simultaneously supports overvoltage fault protection, over-temperature protection and open circuit detection diagnosis.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A multifunctional high-low beam driver based on TLD57, characterized in that: including BCM module (1), control module (2), short-distance beam feedback module (3), short-distance beam drive module (4), short-distance beam lamp plate (6), distance light drive module (5) and distance light lamp plate (7), BCM module (1) is connected with control module (2) electricity, control module (2) are connected with short-distance beam feedback module (3) electricity through short-distance beam drive module (4), short-distance beam feedback module (3) are connected with control module (2) electricity, short-distance beam drive module (4) still are connected with short-distance beam lamp plate (6) electricity, control module (2) still are connected with distance light lamp plate (7) electricity through distance light drive module (5).
2. The TLD 57-based multifunctional high-low beam driver as claimed in claim 1, wherein: the low-beam feedback module (3) is electrically connected with the control module (2), in particular to the low-beam feedback module (3) is electrically connected with the control module (2) through the fault diagnosis module (8).
3. The TLD 57-based multifunctional high-low beam driver as claimed in claim 1, wherein: the low beam driving module (4) and the high beam driving module (5) are chips TLD57 of infineon company.
4. The TLD 57-based multifunctional high-low beam driver as claimed in claim 1, wherein: the control module (2) is a KEA8 single chip microcomputer.
5. A multifunctional high-low beam driving method based on TLD57 is characterized in that: the method comprises the following steps: the method comprises the following steps: waiting for the input signal to be detected;
step two: judging whether the signal is a welcome signal or not, and if the signal is the welcome signal, executing the welcome function and feeding back;
step three: if the signal is not a welcome signal, judging whether the signal is a near light signal, if the signal is the near light signal, executing a near light function and continuously judging whether a fault exists, if the fault exists, closing the near light function, if the fault does not exist, judging whether the temperature exceeds a threshold value, if the temperature does not exceed the threshold value, feeding back, and if the temperature exceeds the threshold value, performing linear flow reduction;
step four: if the signal is not the welcome signal, judging whether the signal is a near light signal, if the signal is not the near light signal, judging whether the signal is a high beam signal, and if the signal is not the high beam signal, performing feedback; if the signal is a high beam signal, executing a high beam function, continuously judging whether the temperature exceeds a threshold value, and if the temperature does not exceed the threshold value, performing feedback; and if the threshold value is exceeded, executing linear down flow.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911142831.1A CN112824149A (en) | 2019-11-20 | 2019-11-20 | TLD 5097-based multifunctional high-low beam driver and driving method |
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| CN201911142831.1A CN112824149A (en) | 2019-11-20 | 2019-11-20 | TLD 5097-based multifunctional high-low beam driver and driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115214454A (en) * | 2021-07-23 | 2022-10-21 | 中山易事达光电科技有限公司 | Intelligent control car lamp system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115214454A (en) * | 2021-07-23 | 2022-10-21 | 中山易事达光电科技有限公司 | Intelligent control car lamp system and control method thereof |
| CN115214454B (en) * | 2021-07-23 | 2023-06-09 | 中山易事达光电科技有限公司 | Intelligent control car lamp system and control method thereof |
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