CN210725429U - Steering lamp constant current circuit - Google Patents
Steering lamp constant current circuit Download PDFInfo
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- CN210725429U CN210725429U CN201921121409.3U CN201921121409U CN210725429U CN 210725429 U CN210725429 U CN 210725429U CN 201921121409 U CN201921121409 U CN 201921121409U CN 210725429 U CN210725429 U CN 210725429U
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Abstract
The utility model relates to a steering lamp constant current circuit. The power supply comprises a power supply input unit with an interface unit, a first load unit, a second load unit, a first constant current unit, a second constant current unit and a fault feedback unit, wherein the first load unit, the second load unit, the first constant current unit, the second constant current unit and the fault feedback unit are respectively connected with the power supply input unit; the first load unit is connected with the first constant current unit, the second load unit is connected with the second constant current unit, and the first constant current unit is connected with the second constant current unit.
Description
Technical Field
The utility model relates to a car light circuit especially discloses a indicator constant current circuit.
Background
With the development of the automobile industry, the current automobiles develop towards intellectualization, informatization and visualization.
At present, fault detection of a plurality of steering lamp constant current circuits mainly continues to use a BCM (body control Module) of an automobile in the original bulb design to detect changes of input current of a lamp to judge whether the steering lamp has faults or not, but the method cannot be completely compatible with the existing LED constant current circuits, so that fault information cannot be fed back in time when the steering lamp has faults.
Disclosure of Invention
An object of the utility model is to overcome the defect that exists among the prior art, provide a can be in time when the indicator breaks down, accurate indicator constant current circuit who feeds back fault information.
The utility model discloses a realize like this: a constant current circuit of a steering lamp comprises a power supply input unit with an interface unit, a first load unit, a second load unit, a first constant current unit, a second constant current unit and a fault feedback unit, wherein the first load unit, the second load unit, the first constant current unit, the second constant current unit and the fault feedback unit are respectively connected with the power supply input unit; the first load unit is connected with the first constant current unit, the second load unit is connected with the second constant current unit, and the first constant current unit is connected with the second constant current unit.
The fault feedback unit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a third diode D3, a fourth bilateral transient suppression diode D4, a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a first capacitor C1, a second capacitor C2 and a third capacitor C3; the anode of the first diode D1 is connected to the FB pin of the interface unit, the cathode of the first diode D1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to one end of the first capacitor C1, one end of the fourth bi-directional transient suppression diode D4, and the collector of the third triode Q3, respectively; the other end of the first capacitor C1, the other end of the fourth bidirectional transient suppression diode D4, the emitter of the third triode Q3 and one end of the second capacitor C2 are connected and then grounded; the other end of the second capacitor C2 is respectively connected to the base of the third triode Q3, one end of the third resistor R3 and the collector of the fourth triode Q4; the other end of the third resistor R3 is connected to the output end of the power input unit; an emitter of the fourth triode Q4 is connected with one end of the third capacitor C3 and then grounded; the base electrode of the fourth triode Q4 is respectively connected with the other end of the third capacitor C3, the negative electrode of the second diode D2 and the negative electrode of the third triode D3;
the anode of the second diode D2 is connected to one end of the first resistor R1 and the collector of the first triode Q1, respectively; an emitter of the first triode Q1 is grounded, and a base of the first triode Q1 is connected with the first load unit and the first constant current unit respectively; the other end of the first resistor R1 is respectively connected with one end of the second resistor R2, the first load unit and the second load unit;
the anode of the third diode D3 is connected to the other end of the second resistor R2 and the collector of the second triode Q2, respectively; the emitter of the second triode Q2 is grounded; and the base electrode of the second triode Q2 is respectively connected with the second load unit and the second constant current unit.
The first constant current unit comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a fifth triode Q5 and a sixth triode Q6;
one end of the fifth resistor R5 is connected to the output end of the power input unit; the other end of the fifth resistor R5 is respectively connected to the second constant current unit, the collector of the fifth triode Q5, one end of the fourth capacitor C4, and one end of the sixth resistor R6; the other end of the fourth capacitor C4 is grounded; the other end of the sixth resistor R6 is connected with the base of the sixth triode Q6; the collector of the sixth triode Q6 is connected to the first load unit; an emitter of the sixth triode Q6 is respectively connected to one end of the second constant current unit and one end of a seventh resistor R7;
the other end of the seventh resistor R7 is respectively connected with one end of the fifth capacitor C5 and the base of a fifth triode Q5; the other end of the fifth capacitor C5 is connected to the emitter of the fifth triode Q5 and then grounded;
the second constant current unit comprises an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a sixth capacitor C6, a seventh capacitor C7 and a seventh triode Q7;
one end of the eighth resistor R8 is connected to one end of the sixth capacitor C6 and the other end of the fifth resistor R5 of the first constant current unit, respectively; the other end of the sixth capacitor C6 is grounded; the other end of the eighth resistor R8 is connected with the base of the seventh triode Q7; the collector of the seventh triode Q7 is connected to the second load unit;
an emitter of the seventh triode Q7 is respectively connected to one end of the seventh capacitor C7, one end of the ninth resistor R9, one end of the tenth resistor R10, the seventh resistor R7 of the first constant current unit, and an emitter of the sixth triode Q6; the other end of the seventh capacitor C7, the other end of the ninth resistor R9 and the other end of the tenth resistor R10 are connected and then grounded.
The first load unit comprises a first light emitting diode LED1, a second light emitting diode LED2 and an eighth capacitor C8;
the second load unit comprises a third light emitting diode LED3, a fourth light emitting diode LED4 and a ninth capacitor C9;
the anode of the first light emitting diode LED1 is connected to one end of the eighth capacitor C8, the output end of the power input unit, the first resistor R1, the second resistor R2, the third resistor R3 of the fault feedback unit, the fifth resistor R5 of the first constant current unit, one end of the ninth capacitor C9 of the second load unit, and the anode of the third light emitting diode LED 3;
the cathode of the first light emitting diode LED1 is connected with the anode of the second light emitting diode LED 2; the anode of the second light emitting diode LED2 is connected to the other end of the eighth capacitor C8, the collector of the sixth triode Q6 of the first constant current unit, and the base of the first triode Q1 of the fault feedback unit, respectively;
the cathode of the third light emitting diode LED3 is connected with the anode of the fourth light emitting diode LED 4; and the cathode of the fourth light emitting diode LED4 is respectively connected to the other end of the ninth capacitor C9, the base of the second triode Q2 of the fault feedback unit, and the collector of the seventh triode Q7 of the second constant current unit.
The power input unit comprises a tenth capacitor C10, an eleventh capacitor C11, an eleventh resistor R11, a fifth diode D5 and a sixth bidirectional transient suppression diode D6; one end of the tenth capacitor C10 is respectively connected to the interface unit, one end of the eleventh resistor R11, one end of the sixth bidirectional transient suppression diode D6, and the anode of the fifth diode D5, and the cathode of the fifth diode D5 is the output end of the power input unit; the other end of the tenth capacitor C10 is connected to one end of the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is connected to the interface unit, the other end of the eleventh resistor R11, and the other end of the sixth bidirectional transient suppression diode D6, and then grounded.
The utility model has the advantages that: when the indicator broke down, can in time pass through the trouble feedback unit carries out the trouble feedback, overcomes automobile body control module BCM and only relies on the change that detects lamps and lanterns input current, judges the shortcoming whether lamps and lanterns broke down, the utility model discloses can accurately feed back out the fault information of the LED indicator of constituteing by first load unit and second load unit.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
According to fig. 1, the present invention comprises a power input unit with an interface unit, a first load unit, a second load unit, a first constant current unit, a second constant current unit and a fault feedback unit, which are connected to the power input unit, respectively, wherein the fault feedback unit is connected to the first load unit and the second load unit, respectively; the first load unit is connected with the first constant current unit, the second load unit is connected with the second constant current unit, and the first constant current unit is connected with the second constant current unit.
The fault feedback unit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a third diode D3, a fourth bilateral transient suppression diode D4, a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a first capacitor C1, a second capacitor C2 and a third capacitor C3; the anode of the first diode D1 is connected to the interface unit, the cathode of the first diode D1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to one end of the first capacitor C1, one end of the fourth diode D4, and the collector of the third transistor Q3, respectively; the other end of the first capacitor C1, the other end of the fourth bidirectional transient suppression diode D4, the emitter of the third triode Q3 and one end of the second capacitor C2 are connected and then grounded; the other end of the second capacitor C2 is respectively connected to the base of the third triode Q3, one end of the third resistor R3 and the collector of the fourth triode Q4; the other end of the third resistor R3 is connected to the output end of the power input unit; an emitter of the fourth triode Q4 is connected with one end of the third capacitor C3 and then grounded; the base electrode of the fourth triode Q4 is respectively connected with the other end of the third capacitor C3, the negative electrode of the second diode D2 and the negative electrode of the third triode D3;
the anode of the second diode D2 is connected to one end of the first resistor R1 and the collector of the first triode Q1, respectively; an emitter of the first triode Q1 is grounded, and a base of the first triode Q1 is connected with the first load unit and the first constant current unit respectively; the other end of the first resistor R1 is respectively connected with one end of the second resistor R2, the first load unit and the second load unit;
the anode of the third diode D3 is connected to the other end of the second resistor R2 and the collector of the second triode Q2, respectively; the emitter of the second triode Q2 is grounded; and the base electrode of the second triode Q2 is respectively connected with the second load unit and the second constant current unit.
The first constant current unit comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a fifth triode Q5 and a sixth triode Q6;
one end of the fifth resistor R5 is connected to the output end of the power input unit; the other end of the fifth resistor R5 is respectively connected to the second constant current unit, the collector of the fifth triode Q5, one end of the fourth capacitor C4, and one end of the sixth resistor R6; the other end of the fourth capacitor C4 is grounded; the other end of the sixth resistor R6 is connected with the base of the sixth triode Q6; the collector of the sixth triode Q6 is connected to the first load unit; an emitter of the sixth triode Q6 is respectively connected to one end of the second constant current unit and one end of a seventh resistor R7;
the other end of the seventh resistor R7 is respectively connected with one end of the fifth capacitor C5 and the base of a fifth triode Q5; the other end of the fifth capacitor C5 is connected to the emitter of the fifth triode Q5 and then grounded;
the second constant current unit comprises an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a sixth capacitor C6, a seventh capacitor C7 and a seventh triode Q7;
one end of the eighth resistor R8 is connected to one end of the sixth capacitor C6 and the other end of the fifth resistor R5 of the first constant current unit, respectively; the other end of the sixth capacitor C6 is grounded; the other end of the eighth resistor R8 is connected with the base of the seventh triode Q7; the collector of the seventh triode Q7 is connected to the second load unit;
an emitter of the seventh triode Q7 is respectively connected to one end of the seventh capacitor C7, one end of the ninth resistor R9, one end of the tenth resistor R10, the seventh resistor R7 of the first constant current unit, and an emitter of the sixth triode Q6; the other end of the seventh capacitor C7, the other end of the ninth resistor R9 and the other end of the tenth resistor R10 are connected and then grounded.
The first load unit comprises a first light emitting diode LED1, a second light emitting diode LED2 and an eighth capacitor C8;
the second load unit comprises a third light emitting diode LED3, a fourth light emitting diode LED4 and a ninth capacitor C9;
the anode of the first light emitting diode LED1 is connected to one end of the eighth capacitor C8, the output end of the power input unit, the first resistor R1, the second resistor R2, the third resistor R3 of the fault feedback unit, the fifth resistor R5 of the first constant current unit, one end of the ninth capacitor C9 of the second load unit, and the anode of the third light emitting diode LED 3;
the cathode of the first light emitting diode LED1 is connected with the anode of the second light emitting diode LED 2; the anode of the second light emitting diode LED2 is connected to the other end of the eighth capacitor C8, the collector of the sixth triode Q6 of the first constant current unit, and the base of the first triode Q1 of the fault feedback unit, respectively;
the cathode of the third light emitting diode LED3 is connected with the anode of the fourth light emitting diode LED 4; and the cathode of the fourth light emitting diode LED4 is respectively connected to the other end of the ninth capacitor C9, the base of the second triode Q2 of the fault feedback unit, and the collector of the seventh triode Q7 of the second constant current unit.
The power input unit comprises a tenth capacitor C10, an eleventh capacitor C11, an eleventh resistor R11, a fifth diode D5 and a sixth bidirectional transient suppression diode D6; one end of the tenth capacitor C10 is respectively connected to the interface unit, one end of the eleventh resistor R11, one end of the sixth bidirectional transient suppression diode D6, and the anode of the fifth diode D5, and the cathode of the fifth diode D5 is the output end of the power input unit; the other end of the tenth capacitor C10 is connected to one end of the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is connected to the interface unit, the other end of the eleventh resistor R11, and the other end of the sixth bidirectional transient suppression diode D6, and then grounded.
The fault feedback unit monitors fault information of the steering lamps of the first load unit and the second load unit, namely the first light-emitting diode LED1, the second light-emitting diode LED2, the third light-emitting diode LED3 and the fourth light-emitting diode LED4 in real time, and feeds the fault information back to the BCM (body control module) of the automobile, so that a driver can know the fault information.
The failure feedback unit: during normal work, the first triode Q1 and the second triode Q2 are in a conducting state, when the first load unit and the second load unit are in an open circuit state, the first triode Q1 or the second triode Q2 at a fault position is cut off, the second diode D2 and the third diode D3 are conducted, the fourth triode Q4 is conducted, the third triode Q3 is cut off, a high-potential signal at the FB position cannot pass through the first diode D1 and the fourth resistor R4, the third triode Q3 is pulled down to a low potential, and therefore the BCM can feed back fault information through potential change of the FB pin position.
Claims (5)
1. A constant current circuit of a steering lamp is characterized in that: the power supply comprises a power supply input unit with an interface unit, a first load unit, a second load unit, a first constant current unit, a second constant current unit and a fault feedback unit, wherein the first load unit, the second load unit, the first constant current unit, the second constant current unit and the fault feedback unit are respectively connected with the power supply input unit; the first load unit is connected with the first constant current unit, the second load unit is connected with the second constant current unit, and the first constant current unit is connected with the second constant current unit.
2. The turn signal constant current circuit of claim 1, wherein: the fault feedback unit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a third diode D3, a fourth bilateral transient suppression diode D4, a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a first capacitor C1, a second capacitor C2 and a third capacitor C3; the anode of the first diode D1 is connected to the interface unit, the cathode of the first diode D1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to one end of the first capacitor C1, one end of the fourth diode D4, and the collector of the third transistor Q3, respectively; the other end of the first capacitor C1, the other end of the fourth bidirectional transient suppression diode D4, the emitter of the third triode Q3 and one end of the second capacitor C2 are connected and then grounded; the other end of the second capacitor C2 is respectively connected to the base of the third triode Q3, one end of the third resistor R3 and the collector of the fourth triode Q4; the other end of the third resistor R3 is connected to the output end of the power input unit; an emitter of the fourth triode Q4 is connected with one end of the third capacitor C3 and then grounded; the base electrode of the fourth triode Q4 is respectively connected with the other end of the third capacitor C3, the negative electrode of the second diode D2 and the negative electrode of the third triode D3;
the anode of the second diode D2 is connected to one end of the first resistor R1 and the collector of the first triode Q1, respectively; an emitter of the first triode Q1 is grounded, and a base of the first triode Q1 is connected with the first load unit and the first constant current unit respectively; the other end of the first resistor R1 is respectively connected with one end of the second resistor R2, the first load unit and the second load unit;
the anode of the third diode D3 is connected to the other end of the second resistor R2 and the collector of the second triode Q2, respectively; the emitter of the second triode Q2 is grounded; and the base electrode of the second triode Q2 is respectively connected with the second load unit and the second constant current unit.
3. The turn signal constant current circuit of claim 2, wherein: the first constant current unit comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a fifth triode Q5 and a sixth triode Q6;
one end of the fifth resistor R5 is connected to the output end of the power input unit; the other end of the fifth resistor R5 is respectively connected to the second constant current unit, the collector of the fifth triode Q5, one end of the fourth capacitor C4, and one end of the sixth resistor R6; the other end of the fourth capacitor C4 is grounded; the other end of the sixth resistor R6 is connected with the base of the sixth triode Q6; the collector of the sixth triode Q6 is connected to the first load unit; an emitter of the sixth triode Q6 is respectively connected to one end of the second constant current unit and one end of a seventh resistor R7;
the other end of the seventh resistor R7 is respectively connected with one end of the fifth capacitor C5 and the base of a fifth triode Q5; the other end of the fifth capacitor C5 is connected to the emitter of the fifth triode Q5 and then grounded;
the second constant current unit comprises an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a sixth capacitor C6, a seventh capacitor C7 and a seventh triode Q7;
one end of the eighth resistor R8 is connected to one end of the sixth capacitor C6 and the other end of the fifth resistor R5 of the first constant current unit, respectively; the other end of the sixth capacitor C6 is grounded; the other end of the eighth resistor R8 is connected with the base of the seventh triode Q7; the collector of the seventh triode Q7 is connected to the second load unit;
an emitter of the seventh triode Q7 is respectively connected to one end of the seventh capacitor C7, one end of the ninth resistor R9, one end of the tenth resistor R10, the seventh resistor R7 of the first constant current unit, and an emitter of the sixth triode Q6; the other end of the seventh capacitor C7, the other end of the ninth resistor R9 and the other end of the tenth resistor R10 are connected and then grounded.
4. The turn signal constant current circuit of claim 3, wherein: the first load unit comprises a first light emitting diode LED1, a second light emitting diode LED2 and an eighth capacitor C8;
the second load unit comprises a third light emitting diode LED3, a fourth light emitting diode LED4 and a ninth capacitor C9;
the anode of the first light emitting diode LED1 is connected to one end of the eighth capacitor C8, the output end of the power input unit, the first resistor R1, the second resistor R2, the third resistor R3 of the fault feedback unit, the fifth resistor R5 of the first constant current unit, one end of the ninth capacitor C9 of the second load unit, and the anode of the third light emitting diode LED 3;
the cathode of the first light emitting diode LED1 is connected with the anode of the second light emitting diode LED 2; the anode of the second light emitting diode LED2 is connected to the other end of the eighth capacitor C8, the collector of the sixth triode Q6 of the first constant current unit, and the base of the first triode Q1 of the fault feedback unit, respectively;
the cathode of the third light emitting diode LED3 is connected with the anode of the fourth light emitting diode LED 4; and the cathode of the fourth light emitting diode LED4 is respectively connected to the other end of the ninth capacitor C9, the base of the second triode Q2 of the fault feedback unit, and the collector of the seventh triode Q7 of the second constant current unit.
5. The turn signal constant current circuit of claim 1, wherein: the power input unit comprises a tenth capacitor C10, an eleventh capacitor C11, an eleventh resistor R11, a fifth diode D5 and a sixth bidirectional transient suppression diode D6; one end of the tenth capacitor C10 is respectively connected to the interface unit, one end of the eleventh resistor R11, one end of the sixth bidirectional transient suppression diode D6, and the anode of the fifth diode D5, and the cathode of the fifth diode D5 is the output end of the power input unit; the other end of the tenth capacitor C10 is connected to one end of the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is connected to the interface unit, the other end of the eleventh resistor R11, and the other end of the sixth bidirectional transient suppression diode D6, and then grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121409.3U CN210725429U (en) | 2019-07-17 | 2019-07-17 | Steering lamp constant current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121409.3U CN210725429U (en) | 2019-07-17 | 2019-07-17 | Steering lamp constant current circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210725429U true CN210725429U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921121409.3U Active CN210725429U (en) | 2019-07-17 | 2019-07-17 | Steering lamp constant current circuit |
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|---|---|
| CN (1) | CN210725429U (en) |
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2019
- 2019-07-17 CN CN201921121409.3U patent/CN210725429U/en active Active
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