CN112004282B - Quick starting method, medium, equipment and driving module of automobile LED driving module - Google Patents

Quick starting method, medium, equipment and driving module of automobile LED driving module Download PDF

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Publication number
CN112004282B
CN112004282B CN202010935573.9A CN202010935573A CN112004282B CN 112004282 B CN112004282 B CN 112004282B CN 202010935573 A CN202010935573 A CN 202010935573A CN 112004282 B CN112004282 B CN 112004282B
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driving module
unit
voltage
led driving
automobile
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CN112004282A (en
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杨姚佳
姚菁
朱懿
陆涛
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HASCO Vision Technology Co Ltd
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HASCO Vision Technology Co Ltd
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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]
    • H05B45/30—Driver circuits
    • 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]
    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The invention provides a quick starting method, medium, equipment and a driving module of an automobile LED driving module, wherein the quick starting method of the automobile LED driving module comprises the following steps: performing first starting setting on the boosting unit to open a first phase module of the boosting unit to start boosting; the first phase module is boosted, and meanwhile, parameter configuration is carried out on the automobile LED driving module; when the output voltage of the boosting unit reaches the rated maximum value, opening a second phase module of the boosting unit; when the step-up unit is detected to have no overvoltage alarm signal, performing second starting setting on the step-up unit, and opening the output of the step-down unit; and when the voltage-reducing unit outputs voltage, configuring the output voltage and the protection voltage of the voltage-increasing unit. The invention provides a quick starting mode of an LED driving module, which can inhibit starting current, can not excessively prolong starting time and can not increase cost.

Description

Quick starting method, medium, equipment and driving module of automobile LED driving module
Technical Field
The invention belongs to the field of control of LED signal lamps for vehicles, relates to a sectional starting method of a boost chip, and particularly relates to a rapid starting method, medium, equipment and a driving module of an automobile LED driving module.
Background
At present, with the development of automotive headlamp, a power supply topology structure of boosting one-path BOOST and reducing output of multiple-path BUCK is started to be applied in an LDM (light emitting diode (LED Drive Module). Wherein the BOOST module often employs a 2-phase or even more-phase BOOST topology due to power requirements. However, the multiphase BOOST will have a high instantaneous current when the BOOST is started, resulting in a low input voltage to restart LDM, and at the same time trigger an over-current alarm of BCM (Body Control Module, body controller). Although reducing BOOST speed of BOOST may reduce the instantaneous current, too slow a speed results in excessive latency, which may cause the initialization time to exceed the allowable range. Adding peripheral circuitry to the hardware to suppress voltage current surges increases costs, and is clearly not an optimal solution for each automobile manufacturer in the face of the currently highly competitive large environments.
Therefore, how to provide a method, medium, device and driving module for quickly starting an automobile LED (Light Emitting Diode ) driving module, so as to solve the defect that the current in the prior art cannot be reduced in a low-cost manner, and the initialization time of starting can be shortened as much as possible, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a method, medium, device and driving module for quickly starting an LED driving module of an automobile, which are used for solving the problem that the prior art cannot reduce the instantaneous current and at the same time shorten the initialization time of starting as much as possible in a low-cost manner.
To achieve the above and other related objects, an aspect of the present invention provides a method for quickly starting an LED driving module of an automobile, the LED driving module of an automobile includes a step-up unit and a step-down unit; the quick starting method of the automobile LED driving module comprises the following steps: performing first starting setting on the boosting unit to open a first phase module of the boosting unit to start boosting; the first phase module is boosted, and meanwhile, parameter configuration is carried out on the automobile LED driving module; when the output voltage of the boosting unit reaches the rated maximum value, a second phase module of the boosting unit is opened to boost the voltage simultaneously with the first phase module; when the step-up unit is detected to have no overvoltage alarm signal, performing second starting setting on the step-up unit, and opening the output of the step-down unit; and when the voltage-reducing unit outputs voltage, configuring the output voltage and the protection voltage of the voltage-increasing unit so that the LED driving module of the automobile enters a normal working state after the LED driving module of the automobile is started.
In an embodiment of the present invention, the step of performing the first start-up setting on the boost unit includes: setting a rated maximum value of the output voltage of the boosting unit; setting overvoltage protection voltage of the boosting unit; and setting the minimum switching duty ratio of the boosting unit.
In an embodiment of the present invention, the step of setting the overvoltage protection voltage of the boosting unit includes: setting a preset voltage value, and taking the sum of the rated maximum value and the preset voltage value as the overvoltage protection voltage.
In an embodiment of the present invention, the step of configuring parameters of the LED driving module of the automobile includes: reading pre-stored configuration information; the configuration information comprises configuration information of the voltage reduction unit and configuration information of the peripheral circuit; performing parameter configuration on the voltage reducing unit according to the configuration information of the voltage reducing unit; and carrying out parameter configuration on the peripheral circuit of the automobile LED driving module according to the configuration information of the peripheral circuit.
In an embodiment of the present invention, the peripheral circuit includes an input logic circuit, a current gear identification circuit, and a thermistor circuit; the step of performing parameter configuration on the peripheral circuit of the automobile LED driving module according to the configuration information of the peripheral circuit comprises the following steps: the input logic circuit is combined to configure the enabling ends of different LEDs on the automobile; collecting the voltage of a gear identification resistor from the current gear identification circuit, and configuring the current of the automobile LED driving module into a current gear corresponding to the voltage; and generating a configuration file according to the thermistor attribute used in the thermistor circuit, wherein the configuration file is a conversion relation file of the resistance value and the voltage of the thermistor.
In an embodiment of the present invention, before the step of performing the first start-up setting on the boost unit, the method for quickly starting the LED driving module of the automobile further includes: and after the automobile LED driving module is electrified, acquiring a preset rated maximum value for starting the boosting unit.
In an embodiment of the present invention, when detecting that the boosting unit has no overvoltage alarm signal, the step of performing the second starting setting on the boosting unit includes: and continuously detecting the overvoltage alarm signal generated after the second phase module of the boosting unit is opened until the boosting unit is subjected to second starting setting when no overvoltage alarm signal is detected.
Another aspect of the present invention provides a medium having stored thereon a computer program which when executed by a processor implements a method for fast starting up an LED driver module of a vehicle.
In still another aspect, the present invention provides a rapid start apparatus for an LED driving module of an automobile, comprising: a processor and a memory; the memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory, so that the quick start device of the automobile LED driving module executes the quick start method of the automobile LED driving module according to any one of claims 1 to 7.
A final aspect of the present invention provides an automotive LED driving module, comprising: a fast start device of an automotive LED circuit, a step-up unit, a step-down unit and an automotive LED driving module as claimed in claim 9; the boosting unit is respectively connected with a power supply, the step-down unit and quick starting equipment of the automobile LED driving module; the step-down unit is respectively connected with the quick starting equipment of the automobile LED driving module and the automobile LED circuit.
As described above, the rapid starting method, medium, equipment and driving module of the automobile LED driving module execute the sectional starting mode and parameter configuration in parallel, so that the time allocation mode of each step in the starting process of the automobile LED driving module is greatly optimized, the starting time is prolonged, the instantaneous overshoot current is reduced, the starting time is executed in parallel with other initialization steps, the total initialization time can be kept unchanged, the total initialization time can be even further shortened, the instantaneous current can be reduced to the greatest extent by the automobile LED driving module, and the initialization time cannot exceed the allowable range due to overlong starting waiting time.
Drawings
Fig. 1 is a boost circuit diagram of a fast start method of an automotive LED driving module according to an embodiment of the invention.
Fig. 2 is a schematic flow chart of a method for quickly starting an LED driving module of an automobile according to an embodiment of the invention.
Fig. 3 is a schematic diagram showing a starting time period of an automotive LED driving module in the prior art.
Fig. 4 is a schematic diagram showing a start-up duration of a fast start-up method of an LED driving module of an automobile according to an embodiment of the invention.
Fig. 5 shows a voltage waveform diagram of the prior art when the LED driving module of the automobile is started.
Fig. 6 is a voltage waveform diagram of a fast start method of an automotive LED driving module according to an embodiment of the invention.
Fig. 7 is a schematic structural connection diagram of a rapid start device of an LED driving module of an automobile according to an embodiment of the invention.
Fig. 8 is a system configuration diagram of an automotive LED driving module according to an embodiment of the invention.
Description of element reference numerals
1. Quick starting equipment of automobile LED driving module
11. Processor and method for controlling the same
12. Memory device
2. Boosting unit
3. Step-down unit
4. Automobile LED circuit
S21 to S25 steps
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
According to the rapid starting method, medium, equipment and driving module of the automobile LED driving module, by configuring different registers and parameters and matching with a certain starting time sequence, the overshoot of voltage and current is suppressed, the starting time is not greatly increased, and the realization is simple. In addition, the starting method has no increase of material and labor cost, and has obvious effect of inhibiting current overshoot.
The following describes in detail the method, medium, device and driving module for quick start of the LED driving module of the automobile according to the present embodiment with reference to fig. 1 to 8.
Referring to fig. 1, a boost circuit diagram of a fast start method of an automotive LED driving module according to an embodiment of the invention is shown. As shown in fig. 1, in an embodiment, the boost chip is exemplified by an NCV78702 chip, the BUCK chip connected with the boost chip is exemplified by an NCV78723 chip, and the internal circuit structure and control principle of the chip can be referred to the official technical manual data, and NCV78723 is a single-chip high-efficiency BUCK dual-LED driver designed for automotive headlamp applications, such as high beam lamps, low beam lamps, DRL (daytime running light), turn indicator lamps, fog lamps, static turning, etc. NCV78723 is particularly suitable for high current LEDs. 2 LED strings up to 60V may be driven. It includes 2 independent current regulators for the LED string and the required diagnostic functions for the automotive headlamp, requiring very few external components or chips without any external sense resistors to achieve buck current regulation. The available output current and voltage may be tailored to the individual LED string. When more than 2 LED channels are required for 1 module, 2, more than 3 NCV78723 devices can be combined. Including buck single LED drivers. Furthermore, due to SPI programmability, a single hardware configuration can support a variety of application platforms. The quick start of the boost chip takes two-phase start as an embodiment, and the start of the boost chip is performed by a plurality of phases, which corresponds to the number of start phases arranged in the boost chip. A two-phase starting structure is shown in fig. 1.
Specifically, phase1 represents the circuit configuration of the first Phase operation mode. The value of the internal BOOST1_en register is set to be 1 by the BOOST chip so as to set the BOOST chip into a first phase working mode, at this time, a logic conversion circuit in the BOOST chip transmits a final control signal to the VGATE1 pin end to enable the VGATE1 pin end to perform level conversion, so that on-off is realized by T1, BOOST output in the first phase working mode is started, and V_batt realizes energy storage of an inductor L1 and charging of a capacitor C_BST through a conduction path of T1 so as to realize BOOST and form output voltage Vboost. Wherein R_SENSE1 is used for current detection in the first phase operation mode, and the voltage division points of RD1 and RD2 are used for voltage detection in the first phase operation mode.
Specifically, phase2 represents the circuit configuration of the second Phase operation mode. The value of the internal BOOST2_en register is set to be 1, so that the BOOST chip is set to be in a second-phase working mode, at the moment, a logic conversion circuit in the BOOST chip transmits a final control signal to the VGATE2 pin end, so that the VGATE2 pin end performs level conversion, on-off is realized by the T2, BOOST output in the second-phase working mode is started, and V_batt realizes energy storage of the inductor L2 and charging of the capacitor C_BST through a conduction path of the T2, BOOST is realized, and output voltage Vboost is formed. Wherein R_SENS2 is used for current detection in the second phase operation mode, and the voltage division points of RD1 and RD2 are used for voltage detection in the second phase operation mode. However, when the first phase operation mode and the second phase operation mode are simultaneously started to boost, the voltage division points of RD1 and RD2 are used for voltage detection of the final two-phase total voltage. C_BST is a Boost charging capacitor for Boost output.
It should be noted that, if more than two-phase starting structures are provided in the boost chip, the multi-phase starting method exceeding two phases is also included in the scope of the present invention, and the specific starting principle can be analogized according to two-phase starting. The rapid starting method of the automobile LED driving module is applicable to all booster chips provided with at least two-phase starting structures.
Referring to fig. 2, a schematic flow chart of a method for quickly starting an LED driving module of an automobile according to an embodiment of the invention is shown. As shown in fig. 2, the method for quickly starting the LED driving module of the automobile specifically includes the following steps:
s21, performing first starting setting on the boosting unit to open a first phase module of the boosting unit to start boosting.
In the present embodiment, S21 includes:
and setting the rated maximum value of the output voltage of the boosting unit.
In this embodiment, before S21, the method for quickly starting the LED driving module of the automobile further includes: and after the automobile LED driving module is electrified, acquiring a preset rated maximum value for starting the boosting unit. Specifically, the rated maximum value of the BOOST unit BOOST is written in the program code of the MCU (Microcontroller Unit, the micro control unit or the singlechip), and the rated maximum value is directly loaded when the MCU is started.
In practical application, the corresponding BOOST voltage set value is stored in the NVRAM (Non-Volatile Random Access Memory ), and the read speed of the NVRAM is slower, and the start time is increased when the NVRAM is read, so that the time for reading the voltage set value when the MCU starts is saved when the MCU directly loads the rated maximum value. In addition, BOOST only generates impulse current when the voltage rises, but does not generate impulse current when the voltage decreases, so the voltage is firstly configured to be the maximum rated value, and the voltage is regulated back to the voltage set value corresponding to the normal operation of the system after the voltage is stabilized.
(2) And setting the overvoltage protection voltage of the boosting unit.
Specifically, a preset voltage value is set, and the sum of the rated maximum value and the preset voltage value is used as the overvoltage protection voltage. For example, the output overvoltage protection voltage of BOOST is set to the rated maximum voltage plus 2V. Because overvoltage is likely to be caused in the BOOST process, when the overvoltage protection voltage is exceeded, the BOOST chip stops working for a few periods, and continues to work after the voltage returns to the normal point.
(3) And setting the minimum switching duty ratio of the boosting unit.
When the BUCK unit BUCK is not started, after the BOOST unit BOOST is set to be the minimum duty ratio, the starting speed of the BOOST unit BOOST can be reduced, and current overshoot is effectively reduced.
S22, carrying out parameter configuration on the automobile LED driving module while boosting the first phase module.
The first phase module is used as a single-phase switch module to BOOST, so that the starting speed of the BOOST unit BOOST can be reduced, and the current overshoot can be effectively reduced. At this time, the BOOST can be performed in parallel to initialize other circuits in the LED driving module in the period of time when the BOOST is performed at a low starting speed, so as to achieve parallel execution of tasks and multiplexing of time.
In the present embodiment, S22 includes:
(1) Reading pre-stored configuration information; the configuration information includes configuration information of the step-down unit and configuration information of the peripheral circuit.
Because BOOST starts to BOOST by using the first phase module, a certain time is needed, and the parameter reading of the NVRAM can be synchronously performed at the time, which specifically comprises the following steps: reading configuration parameters of the voltage reduction unit, and carrying out parameter configuration on the voltage reduction unit according to the read parameters; and reading configuration parameters of the peripheral circuit so as to carry out parameter configuration on the peripheral circuit of the automobile LED driving module according to the read parameters.
(2) And carrying out parameter configuration on the voltage reducing unit according to the configuration information of the voltage reducing unit.
Since BOOST starts to BOOST with the first phase module at this time, a certain time is required, and BUCK configuration can be performed synchronously at this time, and specific configurations include configuration of BUCK output voltage and output current, and other parameter settings in BUCK circuit applications.
(3) And carrying out parameter configuration on the peripheral circuit of the automobile LED driving module according to the configuration information of the peripheral circuit.
Because BOOST begins to BOOST with the first phase module at this time, a certain time is required, and other peripheral configurations can be synchronously performed at this time.
Specifically, the peripheral circuit includes an input logic circuit, a current gear identification circuit (circuit of RB voltage dividing resistor), and a thermistor circuit (NTC circuit).
In one aspect, the input logic circuit is combined to configure the enabling terminals of different LEDs on the automobile. Specifically, the voltage enabling terminals of the high beam light, the low beam light, the daytime running light, the turn signal light and the fog light or other automobile LEDs can be configured through the input logic circuit, so that the output voltage of the automobile LED driving module is determined to be used for which automobile lamp according to the type of the automobile lamp connected with the automobile LED driving module. For example, there are 3 input/output IO ports, the input logic of the far-reaching headlamp board is set to 001 according to the control of the pull-up resistor and the pull-down resistor of the hardware circuit on the input level, or the signal 001 is sent out through software, and when the MCU detects that the level combination of the 3 input/output IO ports is 001, it can be determined that the far-reaching headlamp board is connected to the automobile LED driving module.
And on the other hand, the voltage of the gear identification resistor is collected from the current gear identification circuit, and the current of the automobile LED driving module is configured into a current gear corresponding to the voltage. Specifically, a voltage dividing resistor is set and named as an RB resistor, the RB resistor and the other resistor are connected in series to form a voltage dividing circuit, the MCU acquires voltage values obtained by dividing the RB resistor and is used for carrying out identity recognition on different current gears, for example, voltage division is carried out on 5V voltage, 3V voltage value corresponds to 3A current needed by a high beam, and when 3V is acquired by the MCU, the voltage reducing unit BUCK circuit outputs 3A current to an automobile high beam circuit; the voltage value of 4.5V corresponds to the current of 4.5A needed by the fog lamp, and when the voltage value of 4.5V is 4.5V acquired by the MCU, the current output by the BUCK unit BUCK circuit to the far fog lamp circuit of the automobile is 4.5A. It should be noted that, specifically, the corresponding relation among the resistance value, the collected voltage and the output current gear can be flexibly set according to the requirement of the system.
In yet another aspect, a configuration file is generated according to the thermistor attribute used in the thermistor circuit, wherein the configuration file is a conversion relation file between the resistance value and the voltage of the thermistor. For example, the resistance value of the thermistor and the voltage are stored in a list form in one-to-one correspondence, and the configuration file is a list.
S23, when the output voltage of the boosting unit reaches the rated maximum value, opening a second phase module of the boosting unit to boost the voltage simultaneously with the first phase module. Because, if the second phase switch module is turned on when the BOOST does not reach the set rated maximum value, the current overshoot phenomenon is aggravated.
Specifically, the detection of the output voltage of the BOOST unit includes that an ADC analog-to-digital conversion unit in a BUCK unit BUCK circuit collects the output voltage, and then the output voltage is communicated to an MCU singlechip, or a peripheral voltage collection circuit connected through a BOOST unit BOOST inputs a collection signal into the MCU singlechip to judge the rated maximum value or other existing collection circuits or collection modes of the output voltage which can be realized in the circuit.
And S24, when the step-up unit is detected to have no overvoltage alarm signal, performing second starting setting on the step-up unit, and opening the output of the step-down unit.
In this embodiment, the overvoltage alarm signal generated after the second phase module of the voltage boosting unit is opened is continuously detected, until no overvoltage alarm signal is detected, a second starting setting is performed on the voltage boosting unit.
Specifically, when the second phase switch module starts to work, the BOOST will generate voltage overshoot, trigger overvoltage alarm, and after the second phase switch module is stabilized, the BOOST overvoltage alarm will be automatically released. Thus, it is necessary to repeatedly read the BOOST over-voltage alarm register until there is no over-voltage alarm.
The second start-up is configured to release the BOOST unit BOOST minimum duty cycle limit. Because the BOOST unit BOOST is already stable at this time, but the duty cycle limitation must be released first, and then the BUCK unit BUCK is turned on, otherwise the BOOST voltage will be pulled down by the back-end LED load due to the too low duty cycle.
S25, when the voltage-reducing unit outputs voltage, the output voltage and the protection voltage of the voltage-increasing unit are configured, so that the automobile LED driving module enters a normal working state after being started.
Specifically, the BOOST output voltage and the protection voltage are reconfigured according to NVRAM parameters. Because the voltage due to BOOST is related to the operating efficiency of the whole LDM. Operating at the rated maximum voltage, the module is inefficient and long-term operation can cause the module to overheat, so the BOOST voltage needs to be set to a reasonable value.
Referring to fig. 3, a schematic diagram of a starting duration of an LED driving module of an automobile in the prior art is shown. As shown in fig. 3, the whole process of starting the LED driving module of the automobile is taken as an initialization process, and fig. 3 shows the duration of each step and the total initialization duration when the LED driving module of the automobile is started in the prior art.
Wherein T0 represents MCU initialization time, T1 represents NVRAM read time, T2 represents BUCK initialization time, T3 represents other peripheral initialization time, T4 represents BOOST time, and T5 represents BUCK start time. Therefore, the steps corresponding to T0 to T5 are sequentially and independently executed according to the time sequence.
Referring to fig. 4, a schematic diagram of a start-up duration of a fast start-up method of an LED driving module of an automobile according to an embodiment of the invention is shown. As shown in fig. 4, the duration of each step and the total initialization duration when the rapid start method of the automobile LED driving module of the present invention is applied to start are shown.
Wherein T0 represents MCU initialization time, T1 represents NVRAM read time, T2 represents BUCK initialization time, T3 represents other peripheral initialization time, T4 represents BOOST time, and T5 represents BUCK start time. From this, it is clear that the BOOST corresponding to T4 is performed in parallel with each of the steps corresponding to T1 to T3. Equal to the sum of the times of fig. 3, but the BOOST time denoted by T4 is greatly prolonged compared with T4 of fig. 3, thereby realizing that the reduction of the overshoot current by T4 is performed in parallel with the other initialization steps while the total initialization time can be kept unchanged, and the total initialization time can be even further shortened.
Referring to fig. 5 and 6, a voltage waveform diagram of a prior art LED driving module for an automobile and a voltage waveform diagram of a method for quickly starting the LED driving module for an automobile according to an embodiment of the invention are shown respectively.
As shown in fig. 5 and 6, curve 1 is the output current of the Boost chip, curve 2 is the input voltage of the Boost chip, and curve 3 is the voltage value of the Boost output of the Boost chip. Fig. 5 shows a waveform change of a signal started by the first phase and the second phase of the boost chip, and a large current surge is generated in the signal, so that the input voltage is greatly reduced. In fig. 6, by starting the two phases, the first phase working mode is started first, and the configuration parameters are read and other circuits are configured while the first phase is boosted, and the second phase is started to start the two phases until the rated maximum value of the boosting is detected, as can be seen by comparing the curves 3 in fig. 5 and 6, the starting time of the automobile LED driving module in the quick starting method of the invention is obviously prolonged, so that the instantaneous current is reduced to the greatest extent, and the initialization time is not longer than the allowable range due to the overlong waiting time. The detection of the experimental instrument shows that the current impact is obviously reduced, and the signal of the input voltage is basically stable.
It should be noted that, the protection scope of the method for quickly starting the LED driving module of the automobile according to the present invention is not limited to the execution sequence of the steps listed in the embodiment, and all the schemes implemented by increasing or decreasing the steps and replacing the steps according to the prior art according to the principles of the present invention are included in the protection scope of the present invention.
In an embodiment, a computer storage medium of the present invention stores a computer program, which when executed by a processor, implements a method for quickly starting the LED driving module of the automobile.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by computer program related hardware. The aforementioned computer program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned computer-readable storage medium includes: various computer storage media such as ROM, RAM, magnetic or optical disks may store program code.
Referring to fig. 7, a schematic structural connection diagram of a rapid start device of an LED driving module of an automobile according to an embodiment of the invention is shown. As shown in fig. 7, the rapid start apparatus 1 of the LED driving module for an automobile of the present invention includes: a processor 11 and a memory 12; the memory 12 is used for storing a computer program, and the processor 11 is used for executing the computer program stored in the memory 12, so that the quick start device 1 of the automobile LED driving module executes each step of the quick start method of the automobile LED driving module. Specifically, the quick starting device of the automobile LED driving module comprises an MCU (Microcontroller Unit, a micro control unit or a singlechip).
The memory may include a random access memory (Random Access Memory, abbreviated as RAM) and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory.
The processor may be a general-purpose processor, including a central processing unit (Central ProcessingUnit, CPU for short), a network processor (Network Processor, NP for short), etc.; but also digital signal processors (Digital Signal Processing, DSP for short), application specific integrated circuits (Alication Specific Integrated Circuit, ASIC for short), field programmable gate arrays (Field Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
Referring to fig. 8, a system structure diagram of an automotive LED driving module according to an embodiment of the invention is shown. As shown in fig. 8, the automotive LED driving module includes: the quick starting device 1, the boosting unit 2, the step-down unit 3 and the automobile LED circuit 4 of the automobile LED driving module execute the quick starting method of the automobile LED driving module.
The step-up unit 2 is respectively connected with a power supply (for example, power is supplied through a vehicle body), the step-down unit 3 and the quick start device 1 of the automobile LED driving module.
The step-down unit 3 is respectively connected with the quick start device 1 of the automobile LED driving module and the automobile LED circuit 4.
The quick starting device 1 of the automobile LED driving module is used for performing first starting setting on the boosting unit so as to open a first phase module of the boosting unit to start boosting; the first phase module is boosted, and meanwhile, parameter configuration is carried out on the automobile LED driving module; when the output voltage of the boosting unit reaches the rated maximum value, a second phase module of the boosting unit is opened to boost the voltage simultaneously with the first phase module; when the step-up unit is detected to have no overvoltage alarm signal, performing second starting setting on the step-up unit, and opening the output of the step-down unit; and when the voltage-reducing unit outputs voltage, configuring the output voltage and the protection voltage of the voltage-increasing unit so that the LED driving module of the automobile enters a normal working state after the LED driving module of the automobile is started.
The specific working principle of the automobile LED driving module is as follows: in the circuit topology structure, a vehicle body supplies power for a BOOST unit BOOST, the BOOST unit BOOST supplies power for a BUCK unit BUCK, and the BUCK unit BUCK supplies power for an automobile LED circuit (LED load). The BOOST unit BOOST and the BUCK unit BUCK can be configured through a quick start device (MCU) of the automobile LED driving module.
In summary, the method, medium, device and driving module for quickly starting the automobile LED driving module in the invention execute in parallel with the configuration of parameters in a sectional starting mode, so that the time distribution mode of each step in the starting process of the automobile LED driving module is greatly optimized, the starting time is prolonged, the instantaneous overshoot current is reduced, and simultaneously, the method and the device execute in parallel with other initialization steps, so that the total initialization time can be kept unchanged, the total initialization time can be even further shortened, the instantaneous current can be reduced to the greatest extent by the automobile LED driving module, and the initialization time cannot exceed the allowable range due to the overlong starting waiting time. The invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (9)

1. The quick starting method of the automobile LED driving module is characterized in that the automobile LED driving module comprises a boosting unit and a depressurization unit; the quick starting method of the automobile LED driving module comprises the following steps:
performing first starting setting on the boosting unit to open a first phase module of the boosting unit to start boosting;
the first phase module is boosted, and meanwhile, parameter configuration is carried out on the automobile LED driving module; reading pre-stored configuration information; the configuration information comprises configuration information of the voltage reduction unit and configuration information of a peripheral circuit; performing parameter configuration on the voltage reducing unit according to the configuration information of the voltage reducing unit; according to the configuration information of the peripheral circuit, parameter configuration is carried out on the peripheral circuit of the automobile LED driving module;
when the output voltage of the boosting unit reaches the rated maximum value, a second phase module of the boosting unit is opened to boost the voltage simultaneously with the first phase module;
when the step-up unit is detected to have no overvoltage alarm signal, performing second starting setting on the step-up unit, and opening the output of the step-down unit;
and when the voltage-reducing unit outputs voltage, configuring the output voltage and the protection voltage of the voltage-increasing unit so that the LED driving module of the automobile enters a normal working state after the LED driving module of the automobile is started.
2. The method for rapid start-up of an automotive LED driving module according to claim 1, wherein the step of performing the first start-up setting on the step-up unit includes:
setting a rated maximum value of the output voltage of the boosting unit;
setting overvoltage protection voltage of the boosting unit;
and setting the minimum switching duty ratio of the boosting unit.
3. The method for rapid start of an automotive LED driving module according to claim 2, wherein the step of setting the overvoltage protection voltage of the step-up unit includes:
setting a preset voltage value, and taking the sum of the rated maximum value and the preset voltage value as the overvoltage protection voltage.
4. The method of claim 1, wherein the peripheral circuitry comprises input logic circuitry, current range identification circuitry, and thermistor circuitry; the step of performing parameter configuration on the peripheral circuit of the automobile LED driving module according to the configuration information of the peripheral circuit comprises the following steps:
the input logic circuit is combined to configure the enabling ends of different LEDs on the automobile;
collecting the voltage of a gear identification resistor from the current gear identification circuit, and configuring the current of the automobile LED driving module into a current gear corresponding to the voltage;
and generating a configuration file according to the thermistor attribute used in the thermistor circuit, wherein the configuration file is a conversion relation file of the resistance value and the voltage of the thermistor.
5. The method of claim 1, wherein prior to the step of performing a first start-up setting on the boost unit, the method further comprises:
and after the automobile LED driving module is electrified, acquiring a preset rated maximum value for starting the boosting unit.
6. The method for quickly starting the LED driving module of the automobile according to claim 1, wherein the step of performing the second starting setting on the boosting unit when the boosting unit is detected to have no overvoltage alarm signal comprises:
and continuously detecting the overvoltage alarm signal generated after the second phase module of the boosting unit is opened until the boosting unit is subjected to second starting setting when no overvoltage alarm signal is detected.
7. A medium having stored thereon a computer program, which when executed by a processor, implements a method for fast starting up an automotive LED driving module according to any one of claims 1 to 6.
8. A rapid start device for an automotive LED driver module, comprising: a processor and a memory;
the memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory, so that the quick start device of the automobile LED driving module executes the quick start method of the automobile LED driving module according to any one of claims 1 to 6.
9. An automotive LED drive module, comprising: a fast start device of an automotive LED circuit, a step-up unit, a step-down unit and an automotive LED driving module as claimed in claim 8;
the boosting unit is respectively connected with a power supply, the step-down unit and quick starting equipment of the automobile LED driving module;
the step-down unit is respectively connected with the quick starting equipment of the automobile LED driving module and the automobile LED circuit.
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