Circuit structure with multiplexing function of single-chip integrated daytime running position lamp
By using a single-chip integrated circuit structure and adjusting the MOSFET and resistor, the daytime running lights and position lights can be reused, solving the problem of high cost in the existing technology and realizing function switching and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-04-10
AI Technical Summary
In the existing technology, daytime running lights and position lights have different functions, which requires the use of different LED chips and optical components, resulting in high chip costs.
It adopts a single-chip integrated circuit structure, and realizes the multiplexing function of daytime running lights and position lights through MOSFET and resistor adjustment. It uses a single chip to control the lighting mode and current of LED light strings.
Simplify circuit design, reduce the number of components, lower costs, and simultaneously enable switching between daytime running lights and position lights.
Smart Images
Figure CN224111340U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to LED drive circuit technical field especially relates to a single chip integrated formula day position lamp multiplex function's circuit structure. BACKGROUND
[0002] The main function of daytime running lights is to improve the visibility of vehicles during daytime driving, thereby increasing road safety. They are usually designed to turn on automatically after the vehicle starts and have relatively high brightness to ensure clear recognition in daylight. While position lights are mainly used in nighttime or dimly lit environments to indicate the outline and size of the vehicle, so that other road users can accurately judge the position and size of the vehicle.
[0003] Because the functions and use scenarios of these two types of lights are different, they need to meet different performance requirements in design. For example, daytime running lights may require higher brightness and wider illumination angle, while position lights need to focus more on the softness and uniformity of light. In order to meet these different requirements, designers usually choose to use different LED chips and optical elements to control the two types of lights respectively, but this approach results in high chip cost. SUMMARY
[0004] The utility model aims at solving the prior art problems, and proposes a single chip integrated formula day position lamp multiplex function's circuit structure.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A single chip integrated formula day position lamp multiplex function's circuit structure, including chip module, day running light power input end and position light power input end that connect in chip module power voltage input end, day running light signal input end and position light signal input end that connect in chip module enable signal input end, day position lamp positive pole that connect in chip module SW end and day position lamp negative pole that connect in chip module IFB end and chip module IFB end and day position lamp negative pole are connected with light modulation circuit.
[0007] Preferably, the light modulation circuit includes a resistor R36 connected between the chip module IFB end and the day position lamp negative pole, a MOS tube Q8 connected to the other end of the resistor R36, and the drain of the MOS tube Q8 connected to the resistor R36, the source of the MOS tube Q8 grounded, and the gate of the MOS tube Q8 connected to the second day running light signal input end.
[0008] Preferably, the day running lamp signal input and the position lamp signal input are connected to the second lead wire through the lead wire connected to the chip module power voltage input, the second lead wire is connected with the resistor R55, and the second lead wire is grounded through the resistor R56.
[0009] Preferably, the chip module is grounded through two grounding ports.
[0010] Compared with the prior art, the circuit has the advantages that:
[0011] The circuit designed in the utility model is controlled by a single chip, LED lamp strings are multiplexed, and the Q8 MOS tube and the R36 resistor are adjusted, so that the function of switching the position lamp to the day running lamp and simultaneously increasing the LED current is realized on the basis of the default position lamp lighting controlled by the day running lamp signal, compared with the prior art, the circuit greatly simplifies the circuit design, reduces the number of circuit elements, and reduces the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 A schematic view of a circuit structure of a single-chip integrated day running position lamp multiplexing function is provided in the utility model. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.
[0014] Referring to Figure 1 A circuit structure of a single-chip integrated day running position lamp multiplexing function includes a chip module, a day running lamp power input DRL and a position lamp power input PL connected to a power voltage input VIN of the chip module, a day running lamp signal input and a position lamp signal input connected to an enable signal input EN of the chip module, a positive electrode PD LED+ of a day running position lamp connected to a SW end of the chip module and a negative electrode P DR LED- of the day running position lamp connected to the SW end of the chip module and an IFB end of the chip module, and a dimming circuit connected between the IFB end of the chip module and the negative electrode of the day running position lamp.
[0015] In the embodiment, the dimming circuit includes a resistor R36 connected between the IFB end of the chip module and the negative electrode of the day running position lamp, a MOS tube Q8 connected to the other end of the resistor R36, and a drain of the MOS tube Q8 connected to the resistor R36, a source of the MOS tube Q8 grounded, and a gate of the MOS tube Q8 connected to the second day running lamp signal input.
[0016] In this embodiment, the day running lamp signal input end and the position lamp signal input end are connected to the second lead wire through the lead wire connected to the chip module power voltage input end, and the second lead wire is connected with the resistor R55, and is grounded through the resistor R56.
[0017] In this embodiment, the chip module is grounded through two grounding ports.
[0018] The day running lamp power input end DRL is first connected to the chip module power voltage input end VIN through the TVS3, the capacitor C28, the resistor R26, the diode D12, the capacitor C55, the capacitor C56, the inductor L4, the capacitor C57, the capacitor CD4, the capacitor C58, the capacitor C59, the capacitor C60, the capacitor C61, and the position lamp power input end PL is connected to the chip module power voltage input end VIN through the TVS4, the capacitor C32, the resistor R27, the D13, the capacitor C55, the capacitor C56, the inductor L4, the capacitor C57, the capacitor CD4, the capacitor C58, the capacitor C59, the capacitor C60, the capacitor C61.
[0019] The IFB is connected through the resistor R57, the resistor R32, the resistor R33, and the resistor R36, and the chip module has two SW ports, which are connected together through the lead wire, and are connected to the day running position lamp positive pole PD inductor LED+ through the inductor L12, the capacitor C62, the capacitor C63, the capacitor C64, and the capacitor CD5.
[0020] The gate of the MOS tube Q8 is connected through the capacitor C45, the resistor R39, the diode D17, the resistor R37, the diode D16, and the second day running lamp signal input end.
[0021] The above are the common functions of resistors, capacitors, inductors, and diodes, which can play the roles of current limiting, voltage dividing, load, filtering, decoupling, rectification, and voltage stabilization. In this circuit, they also play the same roles, and will not be described in detail here.
[0022] When the circuit is used:
[0023] In the initial state of the circuit, the position lamp (PL) is lit, which is realized by the control of the single-chip LED lamp string. The LED lamp string is lit when it receives the position lamp signal.
[0024] When the day running lamp (DRL) signal is activated, the signal is transmitted to the gate of the Q8 MOS tube through the circuit, and the conduction of the Q8 MOS tube is controlled.
[0025] When the Q8 MOS tube is turned on, it forms a conductive path, so that the resistor R36 is integrated into the dimming circuit IFB.
[0026] When the Q8MOS tube is turned on and the R36 is incorporated into the dimming circuit IFB, the chip switches the LED lamp string from the position light mode to the daytime running light mode through internal logic control;
[0027] Due to the incorporation of the R36, the resistance value of the dimming circuit IFB changes, thereby changing the current size through the LED lamp string, and when switched to the daytime running light mode, the LED current is adjusted to be large to achieve the high brightness of the daytime running light.
[0028] Compared with the prior art, the whole working process of the circuit is controlled by a single chip, and the multiplexing function of the daytime running light and the position light is achieved.
[0029] It should be noted that all the above connection relationships constitute an electrical connection relationship.
[0030] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A circuit structure for single-chip integrated day running position lamp multiplexing function, characterized by: The chip module, the daytime running lamp power input end and the position lamp power input end connected to the power voltage input end of the chip module, the daytime running lamp signal input end and the position lamp signal input end connected to the enable signal input end of the chip module, the positive electrode of the daytime running position lamp connected to the SW end of the chip module and the negative electrode of the daytime running position lamp connected to the SW end of the chip module and the IFB end of the chip module, and the dimming circuit connected between the IFB end of the chip module and the negative electrode of the daytime running position lamp.
2. The circuit structure for a single-chip integrated daytime running light multiplexing function according to claim 1, characterized in that: The dimming circuit comprises a resistor R36 connected between the IFB end of the chip module and the negative electrode of the daytime running position lamp, a MOS tube Q8 connected to the other end of the resistor R36, and the drain of the MOS tube Q8 connected with the resistor R36, the source of the MOS tube Q8 grounded, and the gate of the MOS tube Q8 connected with the second daytime running lamp signal input end.
3. The circuit structure for a single-chip integrated daytime running light multiplexing function according to claim 1, characterized in that: The daytime running lamp signal input end and the position lamp signal input end are connected with the second lead wire connected on the enable signal input end of the chip module through the lead wire connected with the power voltage input end of the chip module, and the resistor R55 connected on the second lead wire and grounded through the resistor R56.
4. The circuit structure for a single-chip integrated daytime running light multiplexing function according to claim 2, characterized in that: The chip module is grounded through two grounding ports.