CN206821047U - The dummy load circuit of LED controller for daytime running light - Google Patents
The dummy load circuit of LED controller for daytime running light Download PDFInfo
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- CN206821047U CN206821047U CN201720555889.9U CN201720555889U CN206821047U CN 206821047 U CN206821047 U CN 206821047U CN 201720555889 U CN201720555889 U CN 201720555889U CN 206821047 U CN206821047 U CN 206821047U
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- daytime running
- running light
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Abstract
A kind of dummy load circuit of LED controller for daytime running light, including current sampling circuit, LED controller for daytime running light, pull-up resistor network, switching tube and dead resistance network；Wherein：Current sampling circuit is used for the output current for gathering car body control module, and exports the sampled voltage corresponding to output current；The input of LED controller for daytime running light and the output end of current sampling circuit connect, and the control signal of output end and switching tube connects；One end of pull-up resistor network and the output end of car body control module connect, and the other end of pull-up resistor network and the first end of switching tube connect；Second end of switching tube is connected with one end of dead resistance network, the other end ground connection of dead resistance network.The utility model can avoid LED controller for daytime running light be in normal operating conditions and in there is dutycycle to dim mode of operation when car body control module be mistaken for faulty, and the dummy load circuit is simple in construction, and control is flexible.
Description
Technical field
It the utility model is related to a kind of dummy load circuit of LED controller for daytime running light.
Background technology
LED controller for daytime running light and car body control module（BCM）It is connected, car body control module is driven a vehicle between LED days
Lamp controller is powered.Car body control module also has current diagnostic function in itself, and it can monitor Body Control in real time at work
The output current of module（The electric current of LED controller for daytime running light consumption）, the electric current have to be larger than predetermined current threshold,
Car body control module will be considered that LED controller for daytime running light is in malfunction if this current threshold is less than.
LED controller for daytime running light controls the work of LED daytime running lamps by LED daytime running lamps drive circuit.
When LED controller for daytime running light is in malfunction, LED daytime running lamps can be stopped.And work as LED daytime running lamps
Controller is in normal operating conditions and in when having dutycycle to dim mode of operation, and car body control module was easy to LED days
Between driving lamp controller be mistaken for it is faulty.Because it is in low electricity in the PWM dim signals of LED controller for daytime running light output
Usually, the electric current that LED controller for daytime running light can be caused to consume is less than predetermined current threshold, so that Body Control mould
LED controller for daytime running light can be judged as being in malfunction by block.
Utility model content
Technical problem to be solved in the utility model is the fictitious load electricity for providing a kind of LED controller for daytime running light
Road, it can avoid being in normal operating conditions in LED controller for daytime running light and being in have dutycycle to dim mode of operation
When car body control module be mistaken for faulty, and the dummy load circuit is simple in construction, and control is flexible.
Born in order to solve the above technical problems, the utility model embodiment provides a kind of vacation of LED controller for daytime running light
Carry circuit, including current sampling circuit, LED controller for daytime running light, pull-up resistor network, switching tube and dead resistance net
Network；Wherein：Current sampling circuit is used for the output current for gathering car body control module, and exports the sampling corresponding to output current
Voltage；The input of LED controller for daytime running light and the output end of current sampling circuit connect, the control of LED daytime running lamps
The output end of device and the control signal of switching tube connect；LED controller for daytime running light is used in the LED daytime running lamps controls
Device processed compares the size of sampled voltage and the predetermined threshold voltage corresponding to predetermined threshold electric current when being in normal operating conditions, and
Switching tube conducting is controlled when output current is less than predetermined threshold electric current, failure shape is in the LED controller for daytime running light
The switching tube is controlled to disconnect during state；One end of pull-up resistor network is connected with the output end of the car body control module, pull-up
The other end of resistor network and the first end of switching tube connect；Second end of switching tube is connected with one end of dead resistance network,
The other end ground connection of dead resistance network.
The utility model is at least up to one of following beneficial effect：
1st, the dummy load circuit of the utility model embodiment LED controller for daytime running light be in normal operating conditions,
And in have dutycycle dim mode of operation when, once the output current for determining car body control module is less than scheduled current threshold
Value, can be automatically by the output end of dead resistance network insertion car body control module, it is ensured that the output current of car body control module is big
In predetermined current threshold, so that the erroneous judgement of LED controller for daytime running light will not be faulty by car body control module；
2nd, the dummy load circuit of the utility model embodiment is corresponding come comparison using existing LED controller for daytime running light
The size of sampled voltage in the output current of car body control module and the predetermined threshold voltage corresponding to predetermined threshold electric current, no
Circuit structure is only simplified, reduces manufacturing cost, and threshold voltage can be flexibly set.
Brief description of the drawings
Fig. 1 shows a kind of dummy load circuit of LED controller for daytime running light according to the embodiment of the utility model one
Circuit theory diagrams.
Embodiment
Further explanation is made to the utility model below in conjunction with the accompanying drawings.
Fig. 1 shows a kind of dummy load circuit of LED controller for daytime running light according to the embodiment of the utility model one
Circuit theory diagrams.It refer to shown in Fig. 1, electricity included according to the dummy load circuit of the power circuit of the embodiment of the utility model one
Flow sample circuit 1, LED controller for daytime running light 2, pull-up resistor network 3, switching tube 4 and dead resistance network 5.
Current sampling circuit 1 is used for the output current for gathering car body control module 6, and exports corresponding to the output current
Sampled voltage.In the present embodiment, current sampling circuit 1 includes sampling resistor R400 and image current source circuit 12.Sampling electricity
Resistance R400 is connected between the output end of car body control module 6 and LED daytime running lamps 8, two of image current source circuit 12
Input connection sampling resistor R400 both ends, to gather the voltage at sampling resistor R400 both ends.Image current source circuit 12
Output end be connected with the input of LED controller for daytime running light, image current source circuit 12 is used for the sampling that will collect
The voltage at resistance R400 both ends is exported to LED controller for daytime running light 2 after being amplified.
The input of LED controller for daytime running light 2 is connected with the output end of current sampling circuit 1, LED daytime running lamps
The output end of controller 2 is connected with the control signal of switching tube 4.LED controller for daytime running light 2 was used between the LED days
Driving lamp controller 2 compares sampled voltage and the predetermined threshold voltage corresponding to predetermined threshold electric current when being in normal operating conditions
Size, and when the output current of car body control module 6 is less than predetermined threshold electric current control switching tube 4 turn on, in the LED days
Between driving lamp controller 2 control switching tube 4 to disconnect when be in malfunction.As a rule, the output current of car body control module 6
The direct proportionality between sampled voltage, like this, when sampled voltage is less than predetermined threshold voltage, that is, mean vehicle body
The output current of control module 6 is less than predetermined threshold electric current, and LED controller for daytime running light 2 exports Continuity signal, controlling switch
Pipe 4 turns on.In the present embodiment, LED controller for daytime running light 2 is made up of MCU.
The brightness adjustment control end of LED controller for daytime running light 2 is connected with the input of LED daytime running lamps drive circuit 7,
The output end of LED daytime running lamps drive circuit 7 is connected with LED daytime running lamps 8, for controlling the work of LED daytime running lamps 8
Make.Output end of the LED daytime running lamps 8 also with car body control module 6 is connected.V_supply is the output of car body control module 6
Voltage, V_vin are the input voltages of LED daytime running lamps 8.
One end of pull-up resistor network 3 is connected with the output end of car body control module 6, the other end of pull-up resistor network 3
It is connected with the first end of switching tube 4；Second end of switching tube 4 is connected with one end of dead resistance network 5, dead resistance network 5
The other end ground connection.Pull-up resistor network 3 is made up of multiple pull-up resistors, and multiple pull-up resistors are connected in parallel.Dead resistance net
Network 5 is made up of multiple power resistors, and multiple power resistors are connected in parallel.
In the present embodiment, switching tube 4 is made up of NPN triode Q403；The control signal of switching tube 4, first end and
Second end is respectively NPN triode Q403 base stage, collector and emitter.The fictitious load electricity of LED controller for daytime running light
Road includes current-limiting resistance R412, and current-limiting resistance R412 is connected on the output end and switching tube 4 of LED controller for daytime running light 2
Between control signal.Pull-up resistor network 3 is by the first pull-up resistor R419, the second pull-up resistor R420, the 3rd pull-up resistor
R421 and the 4th pull-up resistor R422 compositions, dead resistance network 5 by the first power resistor R416, the second power resistor R417 and
3rd power resistor R418 is formed.
Preferably, the dummy load circuit of LED controller for daytime running light includes the filtering of an anti-reverse diode D401 and one
Electric capacity C405.Anti-reverse diode D401 positive pole is connected with the output end of car body control module 6, anti-reverse diode D401's
Negative pole is connected with one end of pull-up resistor network 3.Filter capacitor C405 one end connects the defeated of image current source circuit 12 respectively
Go out the input of end and LED controller for daytime running light 2, filter capacitor C405 other end ground connection.
According to a kind of operation principle of the dummy load circuit of LED controller for daytime running light of the embodiment of the utility model one
Approximately as：
When LED controller for daytime running light 2 is in malfunction, LED daytime running lamps 8 are stopped, while LED days
Between driving the controlling switch pipe 4 of lamp controller 2 disconnect, dead resistance network 5 does not work, and the circuit no current of V_suuply rear ends disappears
Consumption, car body control module 6 can detect that its output current is less than predetermined current threshold 130mA, so as to judge row between LED days
Car light controller 2 is in malfunction.There is dutycycle when LED controller for daytime running light 2 is in normal operating conditions and is in
When dimming mode of operation, letter is dimmed to the PWM that LED daytime running lamps drive circuit 7 exports in LED controller for daytime running light 2
Number in the case of low level, LED controller for daytime running light 2 can rapidly detect the output electricity of car body control module 6
Stream is less than predetermined current threshold 130mA, and then controlling switch pipe 4 turns on immediately, and dead resistance network 5 is started working, and makes electricity
Road consumes an electric current for being more than predetermined current threshold 130mA, therefore car body control module 6 will not judge to drive a vehicle between LED days
Lamp controller 2 is faulty, so as to avoid erroneous judgement.
The dummy load circuit of the utility model embodiment is corresponded to using existing LED controller for daytime running light to compare
The size of the sampled voltage of the output current of car body control module 6 and predetermined threshold voltage corresponding to predetermined threshold electric current, no
Circuit structure is only simplified, reduces manufacturing cost, and threshold voltage can be flexibly set.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility model
New spirit and scope.So, if these modifications and variations of the present utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.
Claims (8)
1. a kind of dummy load circuit of LED controller for daytime running light, it is characterised in that including between current sampling circuit, LED days
Driving lamp controller, pull-up resistor network, switching tube and dead resistance network；Wherein：
The current sampling circuit is used for the output current for gathering car body control module, and exports corresponding to the output current
Sampled voltage；
The input of the LED controller for daytime running light is connected with the output end of the current sampling circuit, between the LED days
The output end of driving lamp controller is connected with the control signal of the switching tube；The LED controller for daytime running light is used for
The sampled voltage and corresponding to predetermined threshold electric current when the LED controller for daytime running light is in normal operating conditions
Predetermined threshold voltage size, and control the switching tube to lead when the output current is less than the predetermined threshold electric current
It is logical, control the switching tube to disconnect when the LED controller for daytime running light is in malfunction；
One end of the pull-up resistor network is connected with the output end of the car body control module, the pull-up resistor network it is another
One end is connected with the first end of the switching tube；Second end of the switching tube is connected with one end of the dead resistance network,
The other end ground connection of the dead resistance network.
2. the dummy load circuit of LED controller for daytime running light as claimed in claim 1, it is characterised in that the switching tube
It is made up of NPN triode；Control signal, first end and the second end of the switching tube are respectively the base of the NPN triode
Pole, collector and emitter；
The dummy load circuit of the LED controller for daytime running light includes current-limiting resistance, and the current-limiting resistance is connected on the LED
Between the output end of controller for daytime running light and the control signal of the switching tube.
3. the dummy load circuit of LED controller for daytime running light as claimed in claim 1 or 2, it is characterised in that the electric current
Sample circuit includes sampling resistor and image current source circuit；
The sampling resistor is connected between the output end of the car body control module and LED daytime running lamps, the mirror image electricity
Two inputs of current source circuit connect the both ends of the sampling resistor, to gather the voltage at the sampling resistor both ends；Institute
The output end for stating image current source circuit is connected with the input of the LED controller for daytime running light.
4. the dummy load circuit of LED controller for daytime running light as claimed in claim 3, it is characterised in that between the LED days
The dummy load circuit of driving lamp controller includes filter capacitor, and one end of the filter capacitor connects the mirror current source respectively
The input of the output end of circuit and the LED controller for daytime running light, the other end ground connection of the filter capacitor.
5. the dummy load circuit of LED controller for daytime running light as claimed in claim 1 or 2, it is characterised in that the LED
The dummy load circuit of controller for daytime running light includes an anti-reverse diode, positive pole and the car of the anti-reverse diode
The output end connection of body control module, the negative pole of the anti-reverse diode are connected with one end of the pull-up resistor network.
6. the dummy load circuit of LED controller for daytime running light as claimed in claim 1 or 2, it is characterised in that the consumption
Resistor network is made up of multiple power resistors, and described multiple power resistors are connected in parallel.
7. the dummy load circuit of LED controller for daytime running light as claimed in claim 1 or 2, it is characterised in that the pull-up
Resistor network is made up of multiple pull-up resistors, and described multiple pull-up resistors are connected in parallel.
8. the dummy load circuit of LED controller for daytime running light as claimed in claim 1 or 2, it is characterised in that the LED
Controller for daytime running light is made up of MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720555889.9U CN206821047U (en) | 2017-05-18 | 2017-05-18 | The dummy load circuit of LED controller for daytime running light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720555889.9U CN206821047U (en) | 2017-05-18 | 2017-05-18 | The dummy load circuit of LED controller for daytime running light |
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| Publication Number | Publication Date |
|---|---|
| CN206821047U true CN206821047U (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720555889.9U Active CN206821047U (en) | 2017-05-18 | 2017-05-18 | The dummy load circuit of LED controller for daytime running light |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071405A (en) * | 2021-03-30 | 2021-07-06 | 一汽解放汽车有限公司 | Daytime running lamp drive control method and device, computer equipment and storage medium |
-
2017
- 2017-05-18 CN CN201720555889.9U patent/CN206821047U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071405A (en) * | 2021-03-30 | 2021-07-06 | 一汽解放汽车有限公司 | Daytime running lamp drive control method and device, computer equipment and storage medium |
| CN113071405B (en) * | 2021-03-30 | 2022-12-09 | 一汽解放汽车有限公司 | Daytime running lamp drive control method and device, computer equipment and storage medium |
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