CN215097266U - Switching control circuit of automobile daytime running light and position light - Google Patents
Switching control circuit of automobile daytime running light and position light Download PDFInfo
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- CN215097266U CN215097266U CN202120738100.XU CN202120738100U CN215097266U CN 215097266 U CN215097266 U CN 215097266U CN 202120738100 U CN202120738100 U CN 202120738100U CN 215097266 U CN215097266 U CN 215097266U
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Abstract
The utility model provides a switching control circuit of car day portable lighter and position lamp, include: the input end of the first control loop is connected with an automobile controller to receive a daytime running light signal and is provided with a triode; the input end of the second control loop is connected with the automobile controller to receive the position lamp signal and is provided with a first diode; the input end of the third control loop is connected with the automobile controller to receive the signal of the steering lamp and is provided with a second diode signal; the output end of the first control loop is connected between the input end of the second signal control loop and the anode of the first signal diode; the output end of the second signal control loop and the output end of the third signal control loop are connected through the cathode of the first signal diode and the cathode of the second signal diode. The control circuit has the beneficial effects that the control circuit adopts a full-hardware design, the control method is simple and reliable, the cost performance is high, and the control circuit is mainly applied to the control of the automobile signal lamp so as to achieve the driving safety of the automobile and the surrounding vehicles.
Description
Technical Field
The utility model relates to a control circuit technical field of car light especially relates to a switching control circuit of car day portable lighter and position lamp.
Background
The automobile signal lamp can realize active safety control, namely, the automobile signal lamp prompts road users in a certain visual field range to clearly identify light signals in a flexible light mode, so that the attention of the road users is attracted, corresponding safety avoidance is timely made, and the occurrence of accidents is effectively prevented.
With the increasing demand for light weight and small size of the vehicle lamp, it is becoming a trend to use the daytime running lamp and the position lamp LED in common, i.e., the daytime running lamp is used when the vehicle is running in the daytime, and the position lamp is used when the vehicle is running in the nighttime. In the design scheme of the daytime running light and the position light of the automobile sold in the market at present, the MCU is generally utilized to realize logic switching between the daytime running light and the position light through software, the circuit design is complex, the development and maintenance cost is high, and meanwhile, a program needs to be tested and authenticated in the development process, and the process is complex, so that the problem is particularly important to solve.
Disclosure of Invention
Problem to prior art existence, the utility model provides a switching control circuit of car day portable lighter and position lamp, circuit design is simple, and control method is simple reliable.
The specific technical scheme is as follows:
the utility model provides a switching control circuit of car day portable lighter and position lamp, sets up between car controller and car PWM generating circuit, includes:
the input end of the first control loop is connected with the automobile controller so as to receive a daytime running light signal sent by the automobile controller, and the first control loop is provided with a triode;
the input end of the second control loop is connected with the automobile controller to receive a position lamp signal sent by the automobile controller, and the second control loop is provided with a first diode;
the input end of the third control loop is connected with the automobile controller to receive a turn signal sent by the automobile controller, and the third control loop is provided with a second diode;
the output end of the first control loop is connected between the input end of the second control loop and the anode of the first diode through the collector of the triode, and the emitter of the triode is grounded;
the output end of the second control loop and the output end of the third control loop are connected through the cathode of the first diode and the cathode of the second diode;
the second control loop is connected in parallel with the third control loop;
the PWM generating circuit controls the switching among the daytime running light, the position light and the steering light of the automobile through analog signals generated by the first control loop, the second control loop and the third control loop respectively.
Preferably, the switching control circuit, wherein the first control loop includes:
one end of the first resistor is connected with the input end of the first control loop, and the other end of the first resistor is grounded;
one end of the second resistor is connected with the input end of the first control loop, and the other end of the second resistor is connected with the base electrode of the triode;
and one end of the third resistor is connected with the base electrode of the triode, and the other end of the third resistor is grounded.
Preferably, the switching control circuit, wherein the second control loop includes:
one end of the fourth resistor is connected with the input end of the second control loop, and the other end of the fourth resistor is connected with the anode of the first diode;
one end of the fifth resistor is connected between the fourth resistor and the anode of the first diode, and the other end of the fifth resistor is grounded;
and the collector of the triode is connected between the fourth resistor and the fifth resistor.
Preferably, in the switching control circuit, the second control loop further includes a first capacitor, one end of the first capacitor is connected between the input end of the second control loop and the fourth resistor, and the other end of the first capacitor is grounded.
Preferably, in the switching control circuit, the third control loop includes:
one end of the sixth resistor is connected with the input end of the third control loop, and the other end of the sixth resistor is connected with the anode of the second diode;
and one end of the seventh resistor is connected between the sixth resistor and the anode of the second diode, and the other end of the seventh resistor is grounded.
Preferably, in the switching control circuit, the third control loop further includes a second capacitor, one end of the second capacitor is connected between the input end of the third control loop and the sixth resistor, and the other end of the second capacitor is grounded.
Preferably, the conduction voltage value of the base of the triode is as follows:
Vr3＝R3*VDRL/(R2+R3)
vr3 is the conduction voltage value of the base electrode of the triode;
VDRLis the input voltage of the first control loop;
r2 is the resistance of the second resistor;
r3 is the resistance of the third resistor.
Preferably, the automobile controller and the switching control circuit are provided with an input anti-reverse circuit, and the daytime running light signal and the position light signal are input to the switching control circuit after passing through the input anti-reverse circuit.
The technical scheme of the utility model beneficial effect lie in, daytime, when the driver goes up the electricity simultaneously for the daytime running light position lamp, the daytime running light lights to this discernment degree that improves the vehicle effectively reduces the vehicle and because of the not good accident rate that arouses of sight, switches into the position lamp that luminance is darker night. The control circuit adopts a full-hardware design, has a simple and reliable control method and high cost performance, and is mainly applied to the control of the automobile signal lamp so as to achieve the driving safety of the automobile and surrounding vehicles.
Drawings
Fig. 1 is a schematic circuit diagram of a switching control circuit for a daytime running light and a position light of an automobile according to a preferred embodiment of the present invention;
fig. 2 is a system diagram of a switching control circuit including a daytime running light and a position light of an automobile according to a preferred 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
As shown in fig. 1 and fig. 2, the utility model provides a switching control circuit of car day portable lighter and position lamp sets up between car controller and car PWM generating circuit, include:
the input end of the first control loop L1 is connected with an automobile controller to receive a daytime running light signal DRL sent by an automobile controller BCM, and the first control loop L1 is provided with a triode Q1;
a second control loop L2, the input end of the second control loop L2 is connected with the automobile controller to receive a position light signal PL sent by the automobile controller BCM, and is provided with a first diode D1;
the input end of the third control loop L3 is connected with the automobile controller to receive a turn signal Turning sent by the automobile controller BCM, and a second diode D2 is arranged;
the output end of the first control loop L1 is connected between the input end of the second control loop L2 and the anode of the first diode D1 through the collector of a triode Q1, and the emitter of the triode Q1 is grounded;
the output terminal of the second control loop L2 and the output terminal of the third control loop L3 are connected through the cathode of the first diode D1 and the cathode of the second diode D2;
the second control circuit L2 is connected in parallel with the third control circuit L3;
the PWM generating circuit controls the switching among the daytime running light, the position light, and the turn signal of the automobile by analog signals generated by the first control circuit L1, the second control circuit L2, and the third control circuit L3, respectively.
In this embodiment, the first control loop L1 receives a daytime running light signal transmitted by the vehicle controller BCM, the second control loop L2 receives a position light signal transmitted by the vehicle controller BCM, and the third control loop L3 receives a turn light signal transmitted by the vehicle controller BCM.
When the first control loop L1 is powered on alone, and the second control loop L2 and the third control loop L3 have no input voltage, the input voltage of the first control loop L1 is divided by R2 and R3 to control the conduction of the triode Q1, so that the collector of the triode Q1 is at a low level, and meanwhile, because the second control loop L2 and the third control loop L3 have no input voltage, the diodes D1 and D2 are not conductive, the PL _ Turning end outputs a low level, and the PL _ Turning signal realizes the control of the input pin of the power chip of the switch power supply through the PWM generating circuit, realizes the control of the daytime running light, and enters the daytime running light mode.
When the second control loop L2 is independently powered on, and the first control loop L1 and the third control loop L3 have no input voltage, the triode Q1 is in a cut-off state due to no base drive, so that the collector of the Q1 is in a suspension state, the second control loop L2 circuit does not work, meanwhile, because the second control loop L2 and the third control loop L3 circuit are parallel output circuits, the input voltage at the input end of the second control loop L2 enables the PL _ Turning end to output a high level through the diode D1, and the PL _ Turning signal realizes the control of the input pin of the switching power supply chip through the PWM generating circuit, thereby realizing the control of the position lamp and entering the position lamp mode.
When the first control loop L1 is powered on, the third control loop L3 is at a high potential, and the second control loop L2 is at a low potential, the second control loop L2 and the third control loop L3 are parallel output circuits, because the second control loop L2 is not powered on and the triode Q1 is turned on, the collector is at a low level, the D1 is turned off, and because the third control loop L3 is at a high potential, the PL _ Turning end is output at a high level through the diode D2, the control of the input pin of the switch power chip is realized through the PWM generating circuit, and the control of the position light and the entering of the position light mode are realized.
When the first control loop L1 and the second control loop L2 are powered on simultaneously and the third control loop L3 is low in potential, the input voltage of the first control loop L1 is divided by the voltage of R2 and R3, the conduction of the triode Q1 is controlled, the collector of the Q1 is low level, at this time, the anode potential of the diode D1 is low no matter whether PL is powered on or not, meanwhile, the PL _ Turning end outputs low level because the potential of the third control loop L3 is low, the PL _ Turning signal realizes the control of the input pin of the switching power supply chip through the PWM generating circuit, the control of the daytime running light is realized, and the daytime running light mode is entered.
When the first control loop L1 and the second control loop L2 are powered on simultaneously and the third control loop L3 is at a high potential, since the potential of the third control loop L3 is at a high potential, the PL _ Turning terminal is output at a high level through the diode D2, the control of the input pin of the switching power supply chip is realized through the PWM generating circuit, and the control of the position light and the entering of the position light mode are realized.
In a preferred embodiment, as shown in fig. 1, the first control loop L1 includes:
a first resistor R1, wherein one end of the first resistor R1 is connected with the input end of the first control loop L1, and the other end is grounded;
one end of the second resistor R2 is connected with the input end of the first control loop L1, and the other end of the second resistor R2 is connected with the base electrode of the triode Q1;
and one end of the third resistor R3, one end of the third resistor R3 is connected with the base of the triode Q1, and the other end is grounded.
In this embodiment, the second resistor R2 and the third resistor R3 are connected in series and then connected in parallel with the first resistor R1, the base of the transistor Q1 is connected between the second resistor R2 and the third resistor R3, and the input voltage of the first control loop L1 is divided by the R2 and the R3 to control the conduction of the transistor Q1. The first resistor R1 is 0805 and has a resistance of 5100 ohms, and the second resistor R2 is 0603 and has a resistance of 12000 ohms. The third resistor R3 is 0603 in encapsulation, the resistance value is 2000 ohm-4700 ohm, and the type of the triode Q1 is BC 817-40W.
In a preferred embodiment, as shown in fig. 1, the second control loop L2 includes:
one end of a fourth resistor R4, one end of the fourth resistor R4 is connected with the input end of the second control loop L2, and the other end is connected with the anode of the first diode D1;
a fifth resistor R5, one end of the fifth resistor R5 is connected between the fourth resistor R4 and the anode of the first diode D1, and the other end is grounded;
the collector of the transistor Q1 is connected between the fourth resistor R4 and the fifth resistor R5.
In this embodiment, the fourth resistor R4 is 0603 in package and has a resistance of 12000 ohms, the fifth resistor R5 is 0603 in package and has a resistance of 5100 ohms, and the diode D1 is an integrated diode of BAS21TW-7-F in model.
In a preferred embodiment, as shown in fig. 1, the second control loop L2 further includes a first capacitor C1, one end of the first capacitor C1 is connected between the input end of the second control loop L2 and the fourth resistor R4, and the other end is grounded.
In this embodiment, the first capacitor C1 disposed at the input port of the second control loop L2 is a decoupling capacitor, which filters the interference and current noise of the input signal. The first capacitor C1 has a package of 1210 and a capacity of 1 uF.
In a preferred embodiment, as shown in fig. 1, the third control loop comprises:
a sixth resistor R6, wherein one end of the sixth resistor R6 is connected to the input terminal of the third control loop L3, and the other end is connected to the anode of the second diode D2;
and one end of a seventh resistor R7, the seventh resistor R7 is connected between the sixth resistor R6 and the anode D2 of the second diode, and the other end is grounded.
In this embodiment, the sixth resistor R6 and the seventh resistor R7 are packaged in 0603 with a resistance of 4700 ohms, and the diode D2 is an integrated diode of BAS21 TW-7-F.
In a preferred embodiment, as shown in fig. 1, the third control loop L3 further includes a second capacitor C2, one end of the second capacitor C2 is connected between the input end of the third control loop L3 and the sixth resistor R6, and the other end is grounded.
In this embodiment, the second capacitor C2 disposed at the input port of the third control loop L3 is a decoupling capacitor, which filters the interference and current noise of the input signal. The second capacitor C2 has a package of 0603 and a capacitance of 1 nF.
In a preferred embodiment, the voltage at the base of transistor Q1 is:
Vr3＝R3*VDRL/(R2+R3)
vr3 is the voltage value of the base of the triode Q1;
VDRLis the input voltage of the first control loop L1;
r2 is the resistance of the second resistor R2;
r3 is the resistance of the third resistor R3.
In this embodiment, the input port of the first control loop L1 is first connected to a pull-down first resistor R1 to ground, and the input voltage V is simultaneously appliedDRLThe voltage is divided by the second resistor R2 and the third resistor R3 and then is added to the base of the triode Q1, and the value of the voltage is equal to the divided voltage value of the third resistor R3.
Specifically, after the first control loop L1 and the second control loop L2 are powered on and stabilized simultaneously, the daytime running light control mode is realized, at this time, the first control loop L1 is powered off, the position light control mode is realized, timing is started when the first control loop L1 is powered off, the detection module detects the delay time of switching from the first control loop L1 to the second control loop L2 (by monitoring the change of the output current), and the discharge speed of the capacitor at the front end of the first control loop L1 is accelerated by reducing the resistance value of the third resistor R3, so that the turn-off of the triode Q1 is accelerated, and the delay time of switching from the daytime running light control mode to the position light control mode is shortened.
As shown in fig. 2, in a preferred embodiment, an input anti-reflection circuit is provided in the vehicle controller and the switching control circuit, and the daytime running light signal and the position light signal are input to the switching control circuit after passing through the input anti-reflection circuit.
Specifically, an input anti-reverse circuit is arranged between the automobile controller and the switching control circuit, and when the power supply voltage of the automobile controller is reversed, the input anti-reverse circuit disconnects the whole circuit, so that the safety of the whole switching control circuit behind is ensured.
As shown in fig. 2, the vehicle body controller BCM is connected to the vehicle LED driver. The input end of an input anti-reflection circuit in the LED driving module is connected with a BCM (body controller), the output end of the input anti-reflection circuit is connected with the input end of an input pi-type filter circuit, the output end of the input pi-type filter circuit, the first output end of a PWM (pulse width modulation) generating circuit, namely the control signal output end and the first output end of an NTC (negative temperature coefficient) circuit are respectively connected with the input end of a DC/DC topological structure, and the first output end of the DC/DC topological structure is connected with the input end of output filtering. In the LED load module, a positive LED + is connected with an output end for outputting filtering, a BIN _ R interface is connected with a second output end of a DC/DC topological structure, an NTC _ R interface is connected with an output end of an NTC circuit, a PWM _ R interface is connected with a second output end of a PWM generating circuit, a negative LED-and a grounding end GND are respectively connected with a BCM of the vehicle body controller.
To sum up, the first control loop L1 controls the daytime running light signal DRL, and has a transistor Q1, the second control loop L2 controls the position light signal PL, and has a first diode D1, the third control loop L3 controls the Turning light signal Turning, and has a second diode D2; the collector of the triode Q1 is connected between the input end of the second control loop L2 and the anode of the first diode D1, and the emitter of the triode Q1 is grounded; the second control circuit L2 is connected in parallel with the third control circuit L3. The switching between the daytime running light mode and the position light mode is achieved by powering up and down the first control loop L1, the second control loop L2, and the third control loop L3. And the delay time control of switching from the daytime running light control mode to the position light control mode can be realized by changing the resistance ratio of the second resistance R2 and the third resistance R3.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (8)
1. The utility model provides a switching control circuit of car day portable lighter and position lamp, sets up between car controller and PWM generating circuit, its characterized in that includes:
the input end of the first control loop is connected with the automobile controller so as to receive a daytime running light signal sent by the automobile controller, and the first control loop is provided with a triode;
the input end of the second control loop is connected with the automobile controller to receive a position lamp signal sent by the automobile controller, and the second control loop is provided with a first diode;
the input end of the third control loop is connected with the automobile controller to receive a turn signal sent by the automobile controller, and the third control loop is provided with a second diode;
the output end of the first control loop is connected between the input end of the second control loop and the anode of the first diode through the collector of the triode, and the emitter of the triode is grounded;
the output end of the second control loop and the output end of the third control loop are connected through the cathode of the first diode and the cathode of the second diode;
the second control loop is connected in parallel with the third control loop;
the PWM generating circuit controls the switching among the daytime running light, the position light and the steering light of the automobile through analog signals generated by the first control loop, the second control loop and the third control loop respectively.
2. The switching control circuit of claim 1, wherein the first control loop comprises:
one end of the first resistor is connected with the input end of the first control loop, and the other end of the first resistor is grounded;
one end of the second resistor is connected with the input end of the first control loop, and the other end of the second resistor is connected with the base electrode of the triode;
and one end of the third resistor is connected with the base electrode of the triode, and the other end of the third resistor is grounded.
3. The switching control circuit of claim 1, wherein the second control loop comprises:
one end of the fourth resistor is connected with the input end of the second control loop, and the other end of the fourth resistor is connected with the anode of the first diode;
one end of the fifth resistor is connected between the fourth resistor and the anode of the first diode, and the other end of the fifth resistor is grounded;
and the collector of the triode is connected between the fourth resistor and the fifth resistor.
4. The switching control circuit of claim 3, wherein the second control loop further comprises a first capacitor, one end of the first capacitor is connected between the input end of the second control loop and the fourth resistor, and the other end of the first capacitor is grounded.
5. The switching control circuit of claim 1, wherein the third control loop comprises:
one end of the sixth resistor is connected with the input end of the third control loop, and the other end of the sixth resistor is connected with the anode of the second diode;
and one end of the seventh resistor is connected between the sixth resistor and the anode of the second diode, and the other end of the seventh resistor is grounded.
6. The switching control circuit of claim 5, wherein the third control loop further comprises a second capacitor, one end of the second capacitor is connected between the input end of the third control loop and the sixth resistor, and the other end of the second capacitor is grounded.
7. The switching control circuit of claim 2, wherein the conduction voltage of the transistor is:
Vr3＝R3*VDRL/(R2+R3)
vr3 is the conduction voltage value of the triode;
VDRLis the input voltage of the first control loop;
r2 is the resistance of the second resistor;
r3 is the resistance of the third resistor.
8. The switching control circuit according to claim 1, wherein an input anti-reverse circuit is provided for the vehicle controller and the switching control circuit, and the daytime running light signal and the position light signal are input to the switching control circuit after passing through the input anti-reverse circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738100.XU CN215097266U (en) | 2021-04-12 | 2021-04-12 | Switching control circuit of automobile daytime running light and position light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738100.XU CN215097266U (en) | 2021-04-12 | 2021-04-12 | Switching control circuit of automobile daytime running light and position light |
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| CN215097266U true CN215097266U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120738100.XU Active CN215097266U (en) | 2021-04-12 | 2021-04-12 | Switching control circuit of automobile daytime running light and position light |
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2021
- 2021-04-12 CN CN202120738100.XU patent/CN215097266U/en active Active
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