CN211297047U

CN211297047U - Multifunctional switching control circuit of automobile lamp

Info

Publication number: CN211297047U
Application number: CN201922256703.1U
Authority: CN
Inventors: 梁润雄; 管晓亮
Original assignee: Shenzhen Zhihuang Technology Co ltd
Current assignee: Shenzhen Zhihuang Technology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-18
Anticipated expiration: 2029-12-16

Abstract

The utility model provides a multi-functional switching control circuit of car lamp, including first signal input part, second signal input part, third signal input part, first chip, the second chip, the third chip, first field effect transistor, the second field effect transistor, third field effect transistor and fourth field effect transistor, first signal input part and third signal input part connect first chip input, second chip input is connected to second signal input part, second chip input is connected to first chip output, first signal input part, third chip input is still connected to second signal input part and third signal input part, second chip output is through control signal of the same kind of first field effect transistor output, the third chip is through the second field effect transistor, third field effect transistor and fourth field effect transistor output three routes control signal. The utility model discloses a multi-functional switching control circuit integrated level of car lamp is high, multichannel control signal switching control, and control signal is stable.

Description

Multifunctional switching control circuit of automobile lamp

Technical Field

The utility model relates to an automobile lamp control circuit field, in particular to multi-functional switching control circuit of automobile lamp.

Background

Because the functions of the existing automobile LED lamp are more and more, the output signal of a control circuit provided by the original automobile power supply system is limited, and the stability is poorer. Therefore, people hope to improve the control circuit of the LED lamp, so that the control circuit can control the automobile lamp more stably, and the automobile lamp can be switched randomly, so that the stability is better and the safety is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a multi-functional switching control circuit integrated level of car lamp is high, can realize that the car light conveniently switches, and output voltage is stable.

The utility model discloses A multi-functional switching control circuit of car lamp, including first signal input part S-A, second signal input part S-B, third signal input part S-C, first chip U25, second chip U22, third chip U28, first field effect transistor T14, second field effect transistor T12, third field effect transistor T11 and fourth field effect transistor T13, first signal input part S-A connects first diode D2 positive pole, first diode D2 negative pole passes through first resistance R25 and connects respectively the foot 1 and the third chip U28 foot 3 of first chip U25, third signal input part S-C connects the positive pole of third diode D6, third diode D6 negative pole passes through third resistance R24 and connects respectively first chip U25 foot 2 and third chip U28 foot 6, first chip U25 output end foot 3 connects the second chip U22, the second signal input end S-B is connected to the anode of a second diode D4, the cathode of the second diode D4 is connected to the pin 10 of the second chip U22 and the pin 1 of the third chip U28 through a second resistor R26, the common end of the pin 8 and the pin 11 of the second chip U22 is connected to the pin 1 of the first fet T14, the pin 3 of the first fet T14 is grounded through a fourth resistor R22, the pin 2 of the first fet T14 is connected to the fourth signal output terminal DRV4, the pin 5 of the third chip U28 is connected to the pin 1 of the second fet T12, the pin 3 of the second fet T12 is grounded through a fifth resistor R27, the pin 2 of the second fet T12 is connected to the first signal output terminal DRV1, the pin 7 of the third chip U28 is connected to the pin 1 of the third fet T11, the pin 3 of the third fet T11 is connected to the pin 1 of the second fet T11 through a sixth resistor R5928 and a third fet T599, the pin 2 of the third chip U28 is connected with the pin 1 of the fourth field effect transistor T13, the pin 3 of the fourth field effect transistor T13 is grounded through a seventh resistor R29, the pin 2 of the fourth field effect transistor T13 is connected with a third signal output end DRV3, the pin 8 of the third chip U22 is connected with a power supply voltage 3V, and the pin 4 of the third chip is grounded GND.

Further, the switching control circuit further comprises a first transient suppression diode D11, a second transient suppression diode D12 and a third transient suppression diode D13, wherein one end of the first transient suppression diode D11 is connected to the cathode of the first diode D2 and the common end of the first resistor R25, and the other end of the first transient suppression diode D11 is grounded; one end of the second transient suppression diode D12 is connected with the cathode of the second diode D4 and the common end of the second resistor R26, and the other end is grounded; the third transient suppression diode D13 is connected to the cathode of the third diode D6 and the common terminal of the third resistor R24, and the other end is grounded.

Further, the first chip U25 is a two-input and gate integrated chip.

Further, the second chip U22 is a tri-state buffer.

Further, the third chip U28 is a buffer of type 74HC3G34 DP-Q100.

Further, the first fet T14, the second fet T12, the third fet T11 and the fourth fet T13 are all 2N 7002.

Implement the utility model discloses a multi-functional switching control circuit of car lamp has following profitable technological effect:

the utility model discloses a multi-functional switching control circuit integrated level of car lamp is high, multichannel control signal switching control, and control signal is stable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a multifunctional switching control circuit of an automotive lamp according to an embodiment of the present invention;

FIG. 2 is a pin diagram of the second chip U22 in FIG. 1;

fig. 3 is a circuit diagram of an automotive lamp control circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, in an embodiment of the present invention, A multifunctional switching control circuit of an automotive lamp includes A first signal input terminal S-A, A second signal input terminal S-B, A third signal input terminal S-C, A first chip U25, A second chip U22, A third chip U28, A first fet T14, A second fet T12, A third fet T11 and A fourth fet T13, the first signal input terminal S-A is connected to an anode of A first diode D2, A cathode of the first diode D2 is connected to A pin 1 of the first chip U25 and A pin U28 of the third chip U28 through A first resistor R25, the third signal input terminal S-C is connected to an anode of A third diode D6, A cathode of the third diode D6 is connected to A pin 2 of the first chip U25 and A pin 28 of the third chip U24 through A third resistor R24, the output pin 3 of the first chip U25 is connected with the pin 9 of the second chip U22, the second signal input terminal S-B is connected with the anode of a second diode D4, the cathode of the second diode D4 is connected with the pin 10 of the second chip U22 and the pin 1 of the third chip U28 through a second resistor R26, respectively, the common end of the pin 8 and the pin 11 of the second chip U22 is connected with the pin 1 of the first fet T14, the pin 3 of the first fet T14 is grounded through a fourth resistor R22, the pin 2 of the first fet T14 is connected with the fourth signal output terminal DRV4, the pin 5 of the third chip U28 is connected with the pin 1 of the second fet T12, the pin 3 of the second fet T12 is grounded through a fifth resistor 573r 5, the pin 2 of the second fet T12 is connected with the first signal output terminal DRV1, the pin 28 of the third chip U28 is connected with the pin 7 of the third fet T591, the pin 28 of the sixth fet T599 is grounded through a third pin R599, a pin 2 of a third field effect transistor T11 is connected with a second signal output end DRV2, a pin 2 of a third chip U28 is connected with a pin 1 of a fourth field effect transistor T13, a pin 3 of the fourth field effect transistor T13 is grounded through a seventh resistor R29, a pin 2 of a fourth field effect transistor T13 is connected with a third signal output end DRV3, a pin 8 of the third chip U22 is connected with a power supply voltage 3V, and a pin 4 of the third field effect transistor is grounded GND.

According to a specific embodiment, the switching control circuit further includes a first transient suppression diode (D11), a second transient suppression diode D12 and a third transient suppression diode D13, one end of the first transient suppression diode D11 is connected to the common end of the cathode of the first diode D2 and the first resistor R25, and the other end of the first transient suppression diode D11 is grounded; one end of the second transient suppression diode D12 is connected with the cathode of the second diode D4 and the common end of the second resistor R26, and the other end is grounded; the third transient suppression diode D13 is connected to the cathode of the third diode D6 and the common terminal of the third resistor R24, and the other end is grounded.

According to a specific embodiment, the first chip U25 is a two-input and gate integrated chip.

According to a specific embodiment, the second chip U22 is a tri-state buffer.

According to a specific embodiment, the third chip U28 is a buffer model 74HC3G34 DP-Q100.

According to a specific embodiment, the first fet T14, the second fet T12, the third fet T11, and the fourth fet T13 are each of type 2N 7002.

Further explanation is as follows:

1. when the first signal input end S-A and the third signal input end S-C are at high level and the second signal input end S-B is at low level, the first chip U25, the second chip U22 and the first field effect transistor T14 are used for realizing the voltage division level control of the fourth signal output end DRV4, and the third chip U28, the second field effect transistor T12 and the fourth field effect transistor T13 are used for enabling the first signal output end DRV1 and the third signal output end DRV3 to enter A control state.

2. When the first signal input terminal S-A and the third signal input terminal S-C are both high level, the first chip (U25) outputs high level, and 3A (or pin 9) of the second chip U22 is high level; the two signal input terminals S-B are at low level, the 3OE (or pin 10) of the second chip U22 is enabled, the 3Y (or pin 8) outputs high level, the first fet T14 is turned on, so as to divide the voltage of the fourth resistor R22 and provide the corresponding voltage to the fourth signal output terminal DRV 4.

3. When the first signal input end S-A and the third signal input end S-C are both high level, the third chip U28 outputs high level, the second field effect transistor T12 is conducted, and signal control of the first signal output end DRV1 is achieved.

4. When the second signal input terminal S-B is at a low level, the third chip U28 outputs a high level, and the fourth fet T13 is turned on, thereby implementing the switching signal control of the third signal output terminal DRV 3.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The multifunctional switching control circuit of the automobile lamp is characterized by comprising A first signal input end (S-A), A second signal input end (S-B), A third signal input end (S-C), A first chip (U25), A second chip (U22), A third chip (U28), A first field effect transistor (T14), A second field effect transistor (T12), A third field effect transistor (T11) and A fourth field effect transistor (T13), wherein the first signal input end (S-A) is connected with the anode of A first diode (D2), the cathode of the first diode (D2) is respectively connected with A pin 1 of the first chip (U25) and A pin 3 of A third chip (U28) through A first resistor (R25), the cathode of the third diode (D6) is connected with the anode of A third diode (D6), and the cathode of the third diode (D6) is respectively connected with the first pin 2 of the first chip (U25) and the pin 3 of the third chip (U28) through A third resistor (R24) A pin 6 of a chip (U28), a pin 3 of an output terminal of the first chip (U25) is connected to a pin 9 of the second chip (U22), the second signal input terminal (S-B) is connected to an anode of a second diode (D4), a cathode of the second diode (D4) is respectively connected to a pin 10 of the second chip (U22) and a pin 1 of the third chip (U28) through a second resistor (R26), a common terminal of a pin 8 and a pin 11 of the second chip (U22) is connected to the pin 1 of the first field effect transistor (T14), the pin 3 of the first field effect transistor (T14) is grounded through a fourth resistor (R22), a pin 2 of the first field effect transistor (T14) is connected to a fourth signal output terminal (DRV4), a pin 5 of the third chip (U28) is connected to a pin 1 of the second field effect transistor (T12), and a pin 3 of the second field effect transistor (T6) is connected to a second signal output terminal (DRV 12) through fifth grounding resistor (R27) and a pin 12), the pin 7 of the third chip (U28) is connected with the pin 1 of the third field effect transistor (T11), the pin 3 of the third field effect transistor (T11) is grounded through a sixth resistor (R28), the pin 2 of the third field effect transistor (T11) is connected with a second signal output end (DRV2), the pin 2 of the third chip (U28) is connected with the pin 1 of the fourth field effect transistor (T13), the pin 3 of the fourth field effect transistor (T13) is grounded through a seventh resistor (R29), the pin 2 of the fourth field effect transistor (T13) is connected with a third signal output end (DRV3), the pin 8 of the third chip (U28) is connected with a power supply voltage 3V, and the pin 4 of the third chip is Grounded (GND).

2. The multi-functional switching control circuit according to claim 1, wherein the switching control circuit further comprises a first transient suppressor diode (D11), a second transient suppressor diode (D12) and a third transient suppressor diode (D13), wherein one end of the first transient suppressor diode (D11) is connected to the cathode of the first diode (D2) and the common end of the first resistor (R25), and the other end of the first transient suppressor diode (D11) is grounded; one end of the second transient suppression diode (D12) is connected with the cathode of the second diode (D4) and the common end of a second resistor (R26), and the other end of the second transient suppression diode is grounded; the third transient suppression diode (D13) is connected with the cathode of the third diode (D6) and the common end of a third resistor (R24), and the other end of the third transient suppression diode is grounded.

3. The multi-functional switching control circuit of claim 1, wherein the first chip (U25) is a two-input and gate integrated chip.

4. The multi-functional switching control circuit of claim 1, wherein the second chip (U22) is a tri-state buffer.

5. The multi-functional switching control circuit of claim 1, wherein the third chip (U28) is a buffer of 74HC3G34 DP-Q100.

6. The multi-functional switching control circuit of claim 1 wherein the first fet (T14), the second fet (T12), the third fet (T11) and the fourth fet (T13) are all 2N 7002.