CN214101864U

CN214101864U - Control circuit

Info

Publication number: CN214101864U
Application number: CN202023135926.1U
Authority: CN
Inventors: 蒋敏; 曹钰品; 黄贵业; 邹旭东; 汤海莲
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-08-31
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses a control circuit, which comprises a first power supply module for providing electric energy for a load circuit module; the second power supply module provides electric energy for the load circuit module; the first filter circuit module carries out filter processing on the signal output by the first power supply module; the second filter circuit module carries out filter processing on the signal output by the second power supply module; the first current increasing module prevents a load current of the first power supply module from being less than the BCM open circuit diagnostic current; the second current increasing module prevents a load current of the second power supply module from being smaller than the BCM open-circuit diagnosis current; the current increasing switch module controls the on or off of the first current increasing module; the DC-DC circuit module converts voltage signals output by the first filter circuit module and the second filter circuit module and outputs fixed voltage; the load circuit module comprises at least one LED branch circuit, so that when any power line supplies power firstly, the LED lamp is not lightened, the instrument panel does not report faults, the circuit structure is simple, and the robustness under the limit condition is higher.

Description

Control circuit

Technical Field

The utility model relates to a car light control technology field especially relates to a car light dual supply control circuit.

Background

LED lamps and lanterns wide application in the automotive industry, under the general condition, the car light is by a power cord power supply control, but some lamps and lanterns are by dual supply line power supply, for example the LOGO lamp is usually by left power cord and right power cord simultaneous power supply, but because left and right power cord connect two ports of BCM respectively, because reasons such as BCM tactics and automobile body framework, the power supply can not guarantee to supply power simultaneously about the power cord, it has tens to hundreds of milliseconds to control power cord power supply time sequence about, no matter left power cord supplies power earlier or right power cord supplies power earlier, because there is the time difference, can lead to automobile body panel board mistake report open circuit trouble, and when having LED lamp trouble wherein, all LED lamps can't be controlled to put out, probably arouse navigating mate's maloperation, cause the injury to navigating mate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a control circuit, when having solved current two power cord power supplies, because left power cord power supply and the unable simultaneous power supply of right power cord, there is the time difference and lead to the problem of automobile body panel board mistake report open circuit trouble, realize when arbitrary power cord of the same kind supplies power earlier, LED lamps and lanterns do not light, and the panel board does not report the trouble, and circuit structure is simple, stable, and the robustness under extreme condition is higher.

In order to achieve the above object, the technical solution of the present invention is specifically realized as follows:

the utility model discloses a control circuit, including first power module, second power module, first filter circuit module, second filter circuit module, first increase a class module, second increase a class module, increase a class switch module, DC-DC circuit module and load circuit module, wherein, first power module is used for providing the electric energy for load circuit module; the second power supply module is used for supplying electric energy to the load circuit module; the first filter circuit module is used for filtering the signal output by the first power supply module; the second filter circuit module is used for filtering the signal output by the second power supply module; the first current increasing module is used for preventing the load current of the first power supply module from being smaller than the BCM open-circuit diagnosis current when the first power supply module is powered on firstly and the second power supply module is not powered on; a second current increasing module for preventing a load current of the second power supply module from being less than the BCM open circuit diagnostic current; the current increasing switch module is used for controlling the connection or disconnection of the first current increasing module; the DC-DC circuit module is used for converting the voltage signals output by the first filter circuit module and the second filter circuit module and outputting a fixed voltage; the load circuit module comprises at least one LED branch, and the LED branch is formed by connecting a plurality of LED lamp beads in series.

Further, in the DC-DC circuit module, a first pin of a chip U1 is grounded via a capacitor C3, a first pin of the chip U1 is sequentially connected to a second pin of the chip via a capacitor C3, a resistor R7 and a resistor R6, the second pin of the chip U1 is connected to a gate of the MOS transistor MT1 via a resistor R6, a third pin of the chip U1 is grounded, a fourth pin of the chip U1 is connected to a source of the MOS transistor MT1 via a resistor R8, a fourth pin of the chip U1 is sequentially connected to the ground via a resistor R1 and a resistor R1, the resistor R1 is connected in parallel with the resistor R1, a fourth pin of the chip U1 is sequentially connected to the load circuit module via a resistor R1, a capacitor C1, a resistor R1, a diode DT1 and a resistor R1, an eighth pin of the chip U1 is sequentially connected to the ground via a capacitor C1, and a resistor R1, the tenth pin of the chip U1 is connected to the current-increasing switch circuit module through a resistor R1, the tenth pin of the chip U1 is grounded through a resistor R2, the eleventh pin of the chip U1 is grounded through a resistor R5, the twelfth pin of the chip U1 is grounded, the thirteenth pin of the chip U1 is connected to the second filter circuit module through a resistor R3, the fourteenth pin of the chip U1 is connected to the first filter circuit module, and the fourteenth pin of the chip U1 is connected to the load circuit module through an inductor L1, a diode DT1 and a resistor R15 in sequence.

Further, the chip U1 is a power conversion chip, and its model is TLD 5097.

Further, the MOS tube is an N-channel MOS tube.

Furthermore, the first power module is connected with the first filter circuit module through a power line, the first filter circuit module is connected with the first current increasing module through a power line, the first filter circuit module is connected with the DC-DC circuit module through a power line, the DC-DC circuit module is connected with the load circuit module through a power line, the first filter circuit module is connected with the current increasing switch circuit module through a signal line, the current increasing switch circuit module is connected with the first current increasing module through a signal line, and the DC-DC circuit module is connected with the current increasing switch circuit module through a signal line.

Furthermore, the second power module is connected to the second filter circuit module through a power line, the second filter circuit module is connected to the second current increasing module through a power line, and the second filter circuit module is connected to the DC-DC circuit module through a signal line.

The beneficial technical effects are as follows:

the utility model discloses a control circuit, including first power module, second power module, first filter circuit module, second filter circuit module, first increase a class module, second increase a class module, increase a class switch module, DC-DC circuit module and load circuit module, wherein, first power module is used for providing the electric energy for load circuit module; the second power supply module is used for supplying electric energy to the load circuit module; the first filter circuit module is used for filtering the signal output by the first power supply module; the second filter circuit module is used for filtering the signal output by the second power supply module; the first current increasing module is used for preventing the load current of the first power supply module from being smaller than the BCM open-circuit diagnosis current when the first power supply module is powered on firstly and the second power supply module is not powered on; a second current increasing module for preventing a load current of the second power supply module from being less than the BCM open circuit diagnostic current; the current increasing switch module is used for controlling the connection or disconnection of the first current increasing module; the DC-DC circuit module is used for converting the voltage signals output by the first filter circuit module and the second filter circuit module and outputting a fixed voltage; the load circuit module comprises at least one LED branch, the LED branch is formed by connecting a plurality of LED lamp beads in series, the problem that when the existing double-power-line power supply is carried out, the problem that the open-circuit fault of the instrument panel of the automobile body is mistakenly reported due to the fact that the left power-line power supply and the right power-line power supply cannot be simultaneously supplied with power and the time difference exists is solved, when any one power line supplies power firstly, the LED lamp is not lightened, the instrument panel does not report the fault, the circuit structure is simple and stable, and the robustness under the limit condition is high;

1. in the utility model, the circuit of each module is not limited to a special chip or element, and the replaceability is strong;

2. the utility model discloses in, if when arbitrary one or more LED lamp pearl became invalid, lamps and lanterns reported fault signal and controlled all LED lamp pearls that have this function and do not light, security when improving the road driving.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic diagram of a system structure of a control circuit according to the present invention;

fig. 2 is a schematic circuit structure diagram of a DC-DC circuit module in a control circuit according to the present invention;

fig. 3 is a flowchart illustrating a working process of the control circuit when the first power module supplies power first;

fig. 4 is a flowchart of a work flow when the second power module supplies power first in the control circuit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model discloses a control circuit, see fig. 1, the control circuit includes including first power module, second power module, first filter circuit module, second filter circuit module, first current increasing module, second current increasing module, current increasing switch module, DC-DC circuit module and load circuit module, wherein, the first power module is used for providing the electric energy for the load circuit module; the second power supply module is used for supplying electric energy to the load circuit module; the first filter circuit module is used for filtering the signal output by the first power supply module; the second filter circuit module is used for filtering the signal output by the second power supply module; the first current increasing module is used for preventing the situation that when the first power supply module is powered on firstly and the second power supply module is not powered on, the load current of the first power supply module is smaller than the BCM open-circuit diagnosis current, so that the vehicle body instrument panel falsely reports the open-circuit fault; the second current increasing module is used for preventing the load current of the second power supply module from being smaller than the BCM open-circuit diagnosis current so as to prevent the vehicle body instrument panel from reporting an open-circuit fault; the current increasing switch module is used for controlling the connection or disconnection of the first current increasing module; the DC-DC circuit module is used for converting voltage signals output by the first filter circuit module and the second filter circuit module and outputting a fixed voltage; the load circuit module comprises at least one LED branch, and the LED branch is formed by connecting a plurality of LED lamp beads in series.

As an embodiment of the present invention, specifically, the first power module is connected to the first filter circuit module through a power line, the first filter circuit module is connected to the first current increasing module through a power line, the first filter circuit module is connected to the DC-DC circuit module through a power line, the DC-DC circuit module is connected to the load circuit module through a power line, the first filter circuit module is connected to the current increasing switch circuit module through a signal line, the current increasing switch circuit module is connected to the first current increasing module through a signal line, and the DC-DC circuit module is connected to the current increasing switch circuit module through a signal line; the second power supply module is connected with the second filter circuit module through a power line, the second filter circuit module is connected with the second current increasing module through a power line, and the second filter circuit module is connected with the DC-DC circuit module through a signal line.

As an embodiment of the present invention, the DC-DC circuit module includes a power conversion chip, which may be a TLD5097 model, but is not limited herein as long as power conversion is achieved, the first pin of the chip U1 is grounded via a capacitor C3, the first pin of the chip U1 is connected to the second pin of the chip via a capacitor C3, a resistor R7 and a resistor R6 in sequence, the second pin of the chip U1 is connected to the gate of the MOS transistor MT1 via a resistor R6, the third pin of the chip U1 is grounded, the fourth pin of the chip U1 is connected to the source of the MOS transistor MT1 via a resistor R8, preferably, the MOS transistor MT1 is an N-channel MOS transistor, the fourth pin of the chip U1 is grounded via a resistor R8 and a resistor R9 in sequence, a resistor R10 is connected in parallel to the resistor R9, and the fourth pin of the chip U1 is connected to the load diode module 36 8, a capacitor C5, a resistor R867, a resistor R8658, an eighth pin of the chip U1 is grounded through a capacitor C1, meanwhile, an eighth pin of the chip U1 is grounded through a capacitor C2 and a resistor R4 in sequence, a tenth pin of the chip U1 is connected with the current-increasing switch circuit module through a resistor R1, meanwhile, a tenth pin of the chip U1 is grounded through a resistor R2, an eleventh pin of the chip U1 is grounded through a resistor R5, a twelfth pin of the chip U1 is grounded, a thirteenth pin of the chip U1 is connected with the second filter circuit module through a resistor R3, a fourteenth pin of the chip U1 is connected with the first filter circuit module, and meanwhile, a fourteenth pin of the chip U1 is connected with the load circuit module through an inductor L1, a diode DT1 and a resistor R15 in sequence.

The utility model discloses a control circuit's working process does:

when the first power module supplies power firstly, referring to fig. 3, the first filter circuit module outputs a high level, the current-increasing switch circuit module outputs a high level, the first current-increasing module works normally, the first filter circuit module outputs a high level, because the second filter circuit module outputs a low level at the moment, the DC-DC circuit module outputs a low level, the load circuit module does not work, after the second power module supplies power, the second filter circuit module outputs a high level, the second current-increasing module works normally, the DC-DC circuit module outputs a high level at the moment, the load circuit module works, the DC-DC circuit outputs a high level to control the current-increasing switch module circuit to output a low level, the first current-increasing module does not work, and the power consumption is effectively reduced;

when the second power module supplies power firstly, referring to fig. 4, the second filter circuit module outputs a high level, the second current increasing module outputs a high level normally, at this time, the first filter circuit module outputs a low level, so the DC-DC circuit outputs a low level, the load circuit module does not work, the first power module supplies power afterwards, the first filter circuit module outputs a high level, at this time, the current increasing switch circuit outputs a high level, the first current increasing module works, the DC-DC circuit outputs a high level, the load circuit module works normally, the DC-DC circuit outputs a high level, the current increasing switch circuit is controlled to output a low level, the first current increasing module does not work, and power consumption is reduced effectively.

The utility model discloses a control circuit, when arbitrary power of the same kind was supplied power earlier, LED lamp pearl did not light, and the panel board did not report the trouble, only when two way power all supplies power, LED lamp pearl could normally export the high level. The premise that the DC-DC circuit normally outputs high level is that the first filter circuit module and the second filter circuit module both output high level, and the loop of the second power supply module needs to meet the minimum open-circuit diagnosis current, so the second current increasing module always normally works as long as the second power supply module is electrified, if any one or more LEDs are found to be invalid, the lamp reports a fault signal, all the functional LED lamp beads are not bright, a user is reminded to replace the lamp, and the driving safety can be effectively guaranteed.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. A control circuit, comprising:

the first power supply module is used for supplying electric energy to the load circuit module;

the second power supply module is used for supplying electric energy to the load circuit module;

the first filter circuit module is used for filtering the signal output by the first power supply module;

the second filter circuit module is used for filtering the signal output by the second power supply module;

the first current increasing module is used for preventing the load current of the first power supply module from being smaller than the BCM open-circuit diagnosis current when the first power supply module is powered on firstly and the second power supply module is not powered on;

a second current increasing module for preventing a load current of the second power supply module from being less than the BCM open circuit diagnostic current;

the current increasing switch module is used for controlling the connection or disconnection of the first current increasing module;

the DC-DC circuit module is used for converting the voltage signals output by the first filter circuit module and the second filter circuit module and outputting a fixed voltage;

the load circuit module comprises at least one LED branch, and the LED branch is formed by connecting a plurality of LED lamp beads in series.

2. The control circuit according to claim 1, wherein in the DC-DC circuit module, a first pin of a chip U1 is grounded via a capacitor C3, a first pin of the chip U1 is sequentially connected to a second pin of the chip via a capacitor C3, a resistor R7 and a resistor R6, a second pin of the chip U1 is connected to a gate of the MOS transistor MT1 via a resistor R6, a third pin of the chip U1 is grounded, a fourth pin of the chip U1 is connected to a source of the MOS transistor MT1 via a resistor R8, a fourth pin of the chip U1 is sequentially grounded via a resistor R1 and a resistor R1, the resistor R1 is connected in parallel to the resistor R1, a fourth pin of the chip U1 is sequentially connected to the load circuit module via a resistor R1, a capacitor C1, a resistor R1, a diode DT1 and a resistor R1, and an eighth pin of the chip U1 is sequentially grounded via a capacitor C1, a resistor R1 and an eighth pin of the chip U1, the tenth pin of the chip U1 is connected to the current-increasing switch circuit module through a resistor R1, the tenth pin of the chip U1 is grounded through a resistor R2, the eleventh pin of the chip U1 is grounded through a resistor R5, the twelfth pin of the chip U1 is grounded, the thirteenth pin of the chip U1 is connected to the second filter circuit module through a resistor R3, the fourteenth pin of the chip U1 is connected to the first filter circuit module, and the fourteenth pin of the chip U1 is connected to the load circuit module through an inductor L1, a diode DT1 and a resistor R15 in sequence.

3. The control circuit as claimed in claim 2, wherein the chip U1 is a power conversion chip, which is TLD 5097.

4. The control circuit of claim 2, wherein the MOS transistor is an N-channel MOS transistor.

5. The control circuit of claim 1, wherein the first power module is connected to the first filter circuit module through a power line, the first filter circuit module is connected to the first current increasing module through a power line, the first filter circuit module is connected to the DC-DC circuit module through a power line, the DC-DC circuit module is connected to the load circuit module through a power line, the first filter circuit module is connected to the current increasing switch circuit module through a signal line, the current increasing switch circuit module is connected to the first current increasing module through a signal line, and the DC-DC circuit module is connected to the current increasing switch circuit module through a signal line.

6. The control circuit of claim 1, wherein the second power module is connected to the second filter circuit module through a power line, the second filter circuit module is connected to the second current increasing module through a power line, and the second filter circuit module is connected to the DC-DC circuit module through a signal line.