CN117156627A - Lamp control circuit with delay and quick discharge functions - Google Patents

Lamp control circuit with delay and quick discharge functions Download PDF

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Publication number
CN117156627A
CN117156627A CN202311161621.3A CN202311161621A CN117156627A CN 117156627 A CN117156627 A CN 117156627A CN 202311161621 A CN202311161621 A CN 202311161621A CN 117156627 A CN117156627 A CN 117156627A
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CN
China
Prior art keywords
module
delay
lamp
power supply
light source
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Pending
Application number
CN202311161621.3A
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Chinese (zh)
Inventor
黄贵业
方文庆
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Changzhou Xingyu Automotive Lighting Systems Co Ltd
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Changzhou Xingyu Automotive Lighting Systems Co Ltd
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Application filed by Changzhou Xingyu Automotive Lighting Systems Co Ltd filed Critical Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority to CN202311161621.3A priority Critical patent/CN117156627A/en
Publication of CN117156627A publication Critical patent/CN117156627A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The embodiment of the invention discloses a lamp control circuit with delay and rapid discharge functions, which comprises: the filtering module is used for absorbing the pulse and static electricity of the power supply provided by the vehicle body port and filtering high-frequency and low-frequency interference of the power supply port; the delay and rapid discharge module is used for carrying out charge delay and rapid discharge treatment on the power supply processed by the filtering module; the communication module is used for feeding back fault information to the vehicle body; the control module is used for generating a control signal according to the vehicle body input signal transmitted by the communication module, receiving the lamp state, and feeding back fault state information of the lamp function to the communication module; the LED light source communication driving module and the LED light source driving module realize the animation effect and normal lighting and closing of the LEDs. The driving chip which guarantees the traditional driving scheme is used, certain functions of the lamp can be kept on under the condition of communication failure, function flickering can not be caused under the condition of rapid and continuous dormancy awakening, and cost is reduced.

Description

Lamp control circuit with delay and quick discharge functions
Technical Field
The invention relates to the technical field of lamp control circuits, in particular to a lamp control circuit with delay and rapid discharge functions.
Background
Recently, the development trend of automobiles is intelligent, so that the development of automobile electronic design is also rapidly developed towards the intelligent direction, and the development of automobile body intelligent simultaneously requires the functions of automobile lamps to have various animation effects. In order to meet the requirements and optimize the cost, the whole vehicle end always adopts a communication mode to carry out the design requirement. Although the architecture using communication control has more advantages than the traditional single wire harness control single function, the situation that all functions cannot be used due to communication failure exists, so that in order to solve the hidden trouble, the whole vehicle often requires that certain functions are required to be kept on and not extinguished when the lamp considers the communication failure.
The existing lamp functions meeting the lighting requirement of some functions of the communication failure lamp are often driving chips with communication functions when an LED driving scheme is selected. Although the driving chip with the communication function can meet the requirements of redundancy and functional states in design, the quantity of LEDs with different functions of the lamp is different according to the modeling of the whole vehicle, and the LED current with corresponding functions is also different. In the case of the functions of small number of LEDs and large current, if the driving chips with communication functions are selected, great waste of chip design resources exists in the scheme design, and the cost is too high.
Therefore, a new circuit is necessary to be designed, a driving chip using a traditional driving scheme is guaranteed, certain functions of the lamp can be kept on under the condition of communication failure, function flickering can not be caused under the condition of rapid and continuous dormancy awakening, and cost is reduced.
Disclosure of Invention
The invention aims to provide a lamp control circuit with delay and quick discharge functions.
In order to solve the technical problems, the aim of the invention is realized by the following technical scheme: the utility model provides a lamps and lanterns control circuit with delay and quick discharge function which characterized in that includes: the LED light source comprises a filtering module, a delay and rapid discharge module, a control module, a communication module, an LED light source driving module and an LED light source communication driving module;
the filtering module is used for absorbing pulse and static electricity of a power supply provided by a vehicle body port and filtering high-frequency and low-frequency interference of the power supply port;
the delay and rapid discharge module is used for carrying out charge delay and rapid discharge treatment on the power supply processed by the filtering module and providing the processed power supply for the LED light source communication driving module and the LED light source driving module;
the communication module is used for receiving an input signal of the vehicle body and receiving fault state information of the lamp function fed back from the control module to the vehicle body;
the control module is used for generating a control signal according to the vehicle body input signal transmitted by the communication module, receiving the LED light source communication driving module and the lamp state fed back by the LED light source driving module, and feeding back fault state information of the lamp function to the communication module;
the LED light source communication driving module is used for controlling the animation effect, normal lighting and closing of the lamp function LEDs according to the control signals;
the LED light source driving module is used for performing animation effects, normal lighting and closing of LEDs corresponding to the lamp functions according to the control signals.
The further technical scheme is as follows: the filtering module comprises an anti-reverse connection MOS tube Q1 and a power supply switch MOS tube Q4 which are connected with a power supply port of the vehicle body; the D pole of the reverse connection preventing MOS tube Q1 is connected with a TVS tube T1 with one end grounded and a filter capacitor C1 with the other end grounded; the S electrode of the power supply switch MOS tube Q4 is connected with the S electrode of the reverse connection preventing MOS tube Q1; the D pole of the power supply switch MOS tube Q4 is connected with the LED light source communication driving module and the LED light source driving module; and the G pole of the power supply switch MOS tube Q4 is connected with the delay and quick discharge module.
The further technical scheme is as follows: the filtering module further comprises a MOS tube Q6, and the MOS tube Q6 is connected with the control module; the D pole of the MOS tube Q6 is connected with the G pole of the power supply switch MOS tube Q4 through a resistor R12; and a divider resistor R8 is also connected between the S pole of the power supply switch MOS tube Q4 and the G pole of the power supply switch MOS tube Q4.
The further technical scheme is as follows: the delay and rapid discharge module comprises a comparator U5, a charge-discharge capacitor C67 and a delay resistor R49, wherein the charge capacitor C67 with one end grounded and the delay resistor R49 are connected to the homodromous input end of the comparator U5; the output end of the comparator U5 is connected with a MOS tube Q3, and the D pole of the MOS tube Q3 is connected with the G pole of the power supply switch MOS tube Q4.
The further technical scheme is as follows: the inverting input end of the comparator U5 is connected with a divider resistor R50 and a divider resistor R51.
The further technical scheme is as follows: the delay resistor R49 is connected with a diode D3 in parallel; the delay resistor R49 is connected with the charging capacitor C67 and then connected with a discharging resistor R10 in parallel; the same-direction input end of the comparator U5 is connected with a discharge resistor R34, and a MOS tube Q8 is connected between the discharge resistor R34 and the control module.
The further technical scheme is as follows: the communication module comprises a LIN chip U1; and the LIN chip U1 and the vehicle body port are connected with an anti-reverse diode D1.
The further technical scheme is as follows: the control module comprises a main control chip U3.
The further technical scheme is as follows: the LED light source communication driving module comprises a communication driving chip PU, and the communication driving chip PU is respectively connected with the lamp function LEDs and the control unit.
The further technical scheme is as follows: the LED light source driving module comprises a driving chip SU1, and the driving chip SU1 is connected with the control unit through a switch component; the driving chip SU1 is connected with a lamp function LED.
Compared with the prior art, the invention has the beneficial effects that: according to the LED lamp, the filtering module, the delay and rapid discharging module, the control module, the communication module, the LED light source driving module and the LED light source communication driving module are arranged, the LEDs are driven in different driving modes, the delay and rapid discharging module is added behind the filtering module and is controlled by the control module, the driving chip using the traditional driving scheme is ensured, certain functions of the lamp can be kept on under the condition of communication failure, function flickering is not caused under the condition of rapid and continuous dormancy awakening, and the cost is reduced.
The invention is further described below with reference to the drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a lamp control circuit with time delay and fast discharge functions provided by an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a filtering module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a specific circuit of a delay and fast discharge module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a communication module according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a control module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an LED light source communication driving module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an LED light source driving module according to an embodiment of the present invention;
the figure identifies the description:
10. a filtering module; 20. a delay and rapid discharge module; 30. a control module; 40. a communication module; 50. an LED light source driving module; 60. and the LED light source communication driving module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, fig. 1 is a schematic block diagram of a lamp control circuit with delay and rapid discharge functions, which is provided in an embodiment of the present invention, and can be applied in a scene of lamp control, so as to meet the design requirement of function maintenance lighting under the condition of lamp communication failure, and realize diversification of driving schemes and reduction of driving cost. The lamp is particularly suitable for all functions of the automobile lamp, such as position lamps, turn lamps, brake lamps, reversing lamps, rear fog lamps and the like, which need to be lightened by communication failure lamp functions.
Referring to fig. 1, the lamp control circuit with delay and rapid discharge functions is characterized by comprising: the device comprises a filtering module 10, a delay and rapid discharge module 20, a control module 30, a communication module 40, an LED light source driving module 50 and an LED light source communication driving module 60;
the filtering module 10 is used for absorbing pulse and static electricity of a power supply provided by a vehicle body port and filtering high-frequency and low-frequency interference of the power supply port;
the delay and rapid discharge module 20 is configured to perform charge delay and rapid discharge processing on the power supply processed by the filtering module 10 under the control of the control module 30, and provide the processed power supply to the LED light source communication driving module 60 and the LED light source driving module 50;
the communication module 40 is configured to receive a vehicle body input signal from the communication module 40, and receive fault state information of the lamp function fed back from the control module 30 to the vehicle body;
the control module 30 is configured to generate a control signal according to the vehicle body input signal transmitted by the communication module 40, and receive the lamp status fed back by the LED light source communication driving module 60 and the LED light source driving module 50, and feed back fault status information of the lamp function to the communication module 40;
the LED light source communication driving module 60 is used for controlling the animation effect and the normal lighting and turning off of the functional LEDs of the lamp according to the control signal;
the LED light source driving module 50 is used for performing animation effects and normally-on and off of the LEDs corresponding to the lamp functions according to the control signals.
In the scheme of the conventional communication project, in order to meet the requirement that certain functions of the communication failure lamp are kept on, only the LED light source communication driving module 60 and the LED light source driving module 50 with the main flow with the communication function can be selected, and the different requirements of the whole vehicle on each different function of the lamp are met through the redundant design of software. However, the current mainstream driving chips with communication function are all LED channels and the current that can be driven by a single channel is smaller, and the current is applied to the functions of small number of LEDs and large current, so that the chip resources are wasted somewhat, the cost is wasted, the cost of the lamp is high, and the lamp is not competitive in the market environment. The circuit of the embodiment adds delay and quick discharge functions after the filtering module 10 of the lamp input port, so that the conventional LED driving scheme without communication can also meet the requirement of keeping on certain functions of the lamp with communication failure, the design selection range of the LED light source communication driving module 60 and the LED light source driving module 50 is enlarged, chip resource waste is avoided, the design scheme is optimized, and the cost of the lamp is reduced.
In an embodiment, referring to fig. 2, the filtering module 10 includes an anti-reverse MOS transistor Q1 and a power supply switch MOS transistor Q4 connected to a power supply port of a vehicle body; the D pole of the reverse connection preventing MOS tube Q1 is connected with a TVS tube T1 with one end grounded and a filter capacitor C1 with one end grounded; the S electrode of the power supply switch MOS tube Q4 is connected with the S electrode of the reverse connection preventing MOS tube Q1; the D pole of the power supply switch MOS tube Q4 is connected with the LED light source communication driving module and the LED light source driving module; the G pole of the power supply switch MOS transistor Q4 is connected with the delay and rapid discharge module 20.
In an embodiment, referring to fig. 2, the filtering module 10 further includes a MOS transistor Q6, where the MOS transistor Q6 is connected to the control module 30; the D pole of the MOS tube Q6 is connected with the G pole of the power supply switch MOS tube Q4 through a resistor R12; and a divider resistor R8 is also connected between the S pole of the power supply switch MOS tube Q4 and the G pole of the power supply switch MOS tube Q4.
The voltage dividing resistor R8 is connected in parallel with a voltage stabilizing tube D6 and a capacitor C9.
Specifically, the TVS tube T1 and the filter capacitor C1 are used for absorbing the pulse and static electricity of a power supply port of a vehicle body and filtering high-frequency and low-frequency interference of the power supply port; the MOS tube Q1 is used for circuit reverse connection prevention protection, and the MOS tube Q4 is used for a circuit power supply switch; the voltage stabilizing tube D6 is used for overvoltage protection of the MOS tubes Q1 and Q4, and the capacitor C9 is used for filtering interference; the voltage dividing resistor R54 and the voltage dividing resistor R55 form a voltage dividing circuit, the control module 30 inputs high level through KL30_EN, and the MOS tube Q6 is opened; when the MOS transistor Q6 is turned on, the resistors R8 and R12 form a voltage dividing circuit, and the MOS transistors Q1 and Q4 are turned on, so that power is supplied to the KL30_1.
In an embodiment, referring to fig. 3, the delay and rapid discharging module 20 includes a comparator U5, a charge-discharge capacitor C67, and a delay resistor R49, wherein the charge capacitor C67 and the delay resistor R49 are connected to the same-directional input end of the comparator U5; the output end of the comparator U5 is connected with a MOS tube Q3, and the D pole of the MOS tube Q3 is connected with the G pole of the power supply switch MOS tube Q4.
In an embodiment, referring to fig. 3, the inverting input terminal of the comparator U5 is connected to a voltage dividing resistor R50 and a voltage dividing resistor R51.
In an embodiment, referring to fig. 3, the delay resistor R49 is connected in parallel with a diode D3; the delay resistor R49 is connected with the charging capacitor C67 and then connected with the discharging resistor R10 in parallel; the same-direction input end of the comparator U5 is connected with a discharge resistor R34, and a MOS tube Q8 is connected between the discharge resistor R34 and the control module 30.
In the present embodiment, the delay resistor R49 and the charging capacitor C67 constitute a charging delay circuit; the voltage dividing resistor R50 and the voltage dividing resistor R51 form a voltage dividing circuit, and a stable comparison reference voltage is provided for the pin 1 of the comparator U5. When the voltage of the charged capacitor C67 (i.e. the No. 3 pin of the comparator U5) is larger than the voltage of the No. 1 pin of the comparator U5, the No. 4 pin of the comparator outputs a high level, and the MOS tube Q3 is opened; when the MOS transistor Q3 is turned on, similarly, the voltage dividing resistor R8 and the voltage dividing resistor R12 in fig. 2 form a voltage dividing circuit, and the MOS transistors Q1 and Q4 are turned on, so that the kl30_1 can be supplied with power when the control module 30 does not respond.
The divider resistor R36 and the divider resistor R47 form a divider resistor, when the control module 30 receives a sleep command, a high level is input through T-D, the MSO tube Q8 is opened, and the discharge circuit is opened; the diode D3, the resistor R10 and the resistor R34 form a rapid discharging circuit, and the capacitor C67 is rapidly discharged under the working conditions of the dormancy process, the frequent switching of the KL30 and the like.
In one embodiment, referring to fig. 4, the communication module 40 includes a LIN chip U1; the LIN chip U1 and a vehicle body port are connected with an anti-reverse diode D1.
The LIN chip U1 is used for receiving an input signal of a vehicle body and feeding back the state of the lamp to the vehicle body; the diode D1 is used for preventing reverse connection protection, and the capacitor C7 is used for absorbing interference of the power supply port; the capacitor C8 connected with the LIN chip U1 is used for ripple absorption and electrostatic protection of the LIN signal of the vehicle body; capacitors C11 and C60 connected with the LIN chip U1 are filter capacitors, and interference of an output power supply of the chip U1 is filtered.
In an embodiment, referring to fig. 5, the control module 30 includes a main control chip U3. The main control chip U3 is used for lighting the corresponding lamp function LEDs according to the command input by the vehicle body, receiving the states of the lamp function LEDs fed back by the LED light source communication driving module 60 and the LED light source driving module 50, and feeding back fault state information of the lamp function to the LIN chip U1; the capacitor C15 is a filter capacitor, and is used for filtering the interference of a 5V power supply and guaranteeing the stability of the main control chip U3. The resistors R25 and R26 and the capacitors C23 and C24 connected with the main control chip U3 are anti-interference protection circuits of the communication ports, so that the stability of a communication network is improved.
In this embodiment, the model of the master control chip U3 is, but not limited to, S9KEAZ128AMLH.
In an embodiment, referring to fig. 6, the LED light source communication driving module 60 includes a communication driving chip PU, and the communication driving chip PU is connected to the lamp function LEDs and the control unit, respectively. The lamp function LEDs are here embodied as LED lamps PL1 to PL22.
Specifically, the animation effect, normally on and off, etc., of the LEDs is controlled by communication between the PL & TL_SCL and PL & TL_SDA and the control module 30. Other resistance and capacitance are peripheral circuits required by the normal operation of the chip, so that the normal operation of the chip is ensured.
In an embodiment, referring to fig. 7, the LED light source driving module 50 includes a driving chip SU1, and the driving chip SU1 is connected to the control unit through a switch assembly; the driving chip SU1 is connected with a lamp function LED.
The switch component comprises switch MOS tubes SQ3, SQ4, SQ5, SQ6, SQ7 and SQ8; the switch MOS tubes SQ3 and SQ4 are connected; the switch MOS tubes SQ5 and SQ6 are connected; the switch MOS tubes SQ7 and SQ8 are connected; the lamp function LEDs are specifically LED lamps SL1 to SL9.
Specifically, the driving chip SU1 is a conventional driving chip, the control module 30 outputs high and low levels through the I/O ports IR1, IR2, IR3, and the switching MOS transistors SQ3 to SQ8 realize dynamic, lighting and turning off of the LEDs. When the control module 30 fails, the MOS transistors SQ4, SQ6 and SQ8 are opened, so that the LED can be ensured to be lighted. Resistors SR4, SR5 and SR6 are resistors for outputting current of the driving chip SU1, and the magnitude of the output current is adjusted by adjusting the magnitude of the resistance value of the resistors; the resistors SR7, SR8 and SR9 are power resistors, which share the power of the driving chip SU1 and reduce the heat of the driving chip SU 1. SC3 is filter capacitor, filters the interference on the power supply line, guarantees the stability of chip.
The circuit of the embodiment uses a conventional discrete device, has a simple scheme, can not cause the risk of chip shortage in a single circuit because of the control of the selected power switch management chip, and also well reduces the design cost of the circuit. After the communication of the lamp fails, the function requiring lighting can be kept on, and the function requiring extinguishing can be kept off. According to different LED types with different functions, the LED driving scheme is simplified, the scheme type selection range of the LED driving is enlarged, the space for designing the PCB is saved, and diversification and simplification are brought to the LED driving design.
The lamp control circuit with the delay and rapid discharge functions adopts different driving modes to drive the LEDs by arranging the filtering module 10, the delay and rapid discharge module 20, the control module 30, the communication module 40, the LED light source driving module 50 and the LED light source communication driving module 60, and the delay and rapid discharge module 20 is added behind the filtering module 10 and is controlled by the control module 30, so that a driving chip using a traditional driving scheme is ensured, and the lamp can be kept on under the condition of communication failure, and function flickering is not caused under the condition of rapid and continuous dormancy awakening, thereby reducing the cost.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. A lamp control circuit with delay and rapid discharge functions, comprising: the LED light source comprises a filtering module, a delay and rapid discharge module, a control module, a communication module, an LED light source driving module and an LED light source communication driving module;
the filtering module is used for absorbing pulse and static electricity of a power supply provided by a vehicle body port and filtering high-frequency and low-frequency interference of the power supply port;
the delay and rapid discharge module is used for carrying out charge delay and rapid discharge treatment on the power supply processed by the filtering module and providing the processed power supply for the LED light source communication driving module and the LED light source driving module;
the communication module is used for receiving an input signal of the vehicle body and receiving fault state information of the lamp function fed back from the control module to the vehicle body;
the control module is used for generating a control signal according to the vehicle body input signal transmitted by the communication module, receiving the LED light source communication driving module and the lamp state fed back by the LED light source driving module, and feeding back fault state information of the lamp function to the communication module;
the LED light source communication driving module is used for controlling the animation effect, normal lighting and closing of the lamp function LEDs according to the control signals;
the LED light source driving module is used for performing animation effects, normal lighting and closing of LEDs corresponding to the lamp functions according to the control signals.
2. The lamp control circuit with the delay and rapid discharge functions according to claim 1, wherein the filtering module comprises an anti-reverse connection MOS tube Q1 and a power supply switch MOS tube Q4 which are connected with a power supply port of a vehicle body; the D pole of the reverse connection preventing MOS tube Q1 is connected with a TVS tube T1 with one end grounded and a filter capacitor C1 with the other end grounded; the S electrode of the power supply switch MOS tube Q4 is connected with the S electrode of the reverse connection preventing MOS tube Q1; the D pole of the power supply switch MOS tube Q4 is connected with the LED light source communication driving module and the LED light source driving module; and the G pole of the power supply switch MOS tube Q4 is connected with the delay and quick discharge module.
3. The lamp control circuit with the delay and rapid discharge functions according to claim 2, wherein the filtering module further comprises a MOS tube Q6, and the MOS tube Q6 is connected with the control module; the D pole of the MOS tube Q6 is connected with the G pole of the power supply switch MOS tube Q4 through a resistor R12; and a divider resistor R8 is also connected between the S pole of the power supply switch MOS tube Q4 and the G pole of the power supply switch MOS tube Q4.
4. The lamp control circuit with the delay and rapid discharge function according to claim 3, wherein the delay and rapid discharge module comprises a comparator U5, a charge-discharge capacitor C67 and a delay resistor R49, wherein the charge capacitor C67 with one end grounded and the delay resistor R49 are connected to the same-direction input end of the comparator U5; the output end of the comparator U5 is connected with a MOS tube Q3, and the D pole of the MOS tube Q3 is connected with the G pole of the power supply switch MOS tube Q4.
5. The lamp control circuit with delay and rapid discharge function according to claim 4, wherein the inverting input terminal of the comparator U5 is connected with a voltage dividing resistor R50 and a voltage dividing resistor R51.
6. The lamp control circuit with delay and rapid discharge function according to claim 5, wherein the delay resistor R49 is connected in parallel with a diode D3; the delay resistor R49 is connected with the charging capacitor C67 and then connected with a discharging resistor R10 in parallel; the same-direction input end of the comparator U5 is connected with a discharge resistor R34, and a MOS tube Q8 is connected between the discharge resistor R34 and the control module.
7. The lamp control circuit with delay and rapid discharge function of claim 1, wherein the communication module comprises a LIN chip U1; and the LIN chip U1 and the vehicle body port are connected with an anti-reverse diode D1.
8. A lamp control circuit with delay and fast discharge function according to any one of claims 1 to 7, wherein the control module comprises a master control chip U3.
9. The lamp control circuit with the delay and rapid discharge function according to claim 1, wherein the LED light source communication driving module comprises a communication driving chip PU, and the communication driving chip PU is respectively connected with the lamp function LEDs and the control unit.
10. The lamp control circuit with the delay and rapid discharge function according to claim 1, wherein the LED light source driving module comprises a driving chip SU1, and the driving chip SU1 is connected with the control unit through a switch component; the driving chip SU1 is connected with a lamp function LED.
CN202311161621.3A 2023-09-08 2023-09-08 Lamp control circuit with delay and quick discharge functions Pending CN117156627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311161621.3A CN117156627A (en) 2023-09-08 2023-09-08 Lamp control circuit with delay and quick discharge functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311161621.3A CN117156627A (en) 2023-09-08 2023-09-08 Lamp control circuit with delay and quick discharge functions

Publications (1)

Publication Number Publication Date
CN117156627A true CN117156627A (en) 2023-12-01

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Application Number Title Priority Date Filing Date
CN202311161621.3A Pending CN117156627A (en) 2023-09-08 2023-09-08 Lamp control circuit with delay and quick discharge functions

Country Status (1)

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CN (1) CN117156627A (en)

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