CN219592663U - LED driving circuit of electric bicycle lamp - Google Patents
LED driving circuit of electric bicycle lamp Download PDFInfo
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- CN219592663U CN219592663U CN202320742650.8U CN202320742650U CN219592663U CN 219592663 U CN219592663 U CN 219592663U CN 202320742650 U CN202320742650 U CN 202320742650U CN 219592663 U CN219592663 U CN 219592663U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses an LED driving circuit of an electric bicycle lamp, which comprises an anti-reverse connection circuit, a linear constant current control circuit, a far and near light switching control circuit and a daytime running light circuit; the direct current power supply is respectively connected with the linear constant current control circuit and the daytime running light circuit through the anti-reverse connection circuit, and the far and near light switching control circuit is connected with the linear constant current control circuit; the circuit has an over-temperature protection function, the reliability of LED driving is improved, and the output current can be automatically regulated after the chip is over-temperature; the standby power consumption is low, and the constant current precision is high; the circuit architecture is simple, the number of components is small, the driving volume is small, the cost is low, the required requirement of the vehicle lamp in the switching power supply period can be met with lower cost, and most of electric vehicle lamp products can be adapted.
Description
Technical Field
The utility model relates to the technical field of electricity, in particular to an LED driving circuit of an electric bicycle lamp.
Background
Along with the development of economy, the industry of electric bicycles in China is coming into an era of health regulation and vigorous development. The market scale of electric bicycles is still expanding orderly when new national standards fall to the ground. At present, the power of an LED electric vehicle is basically supplied by a battery pack formed by a plurality of storage batteries, the DC 12V power is output through a converter, the main function of linear driving is to adapt the voltage and the current of an LED lamp, and the free switching of far and near light can be realized through an external switch.
The type of LED electric car lamp driving is always dominated by a switching power supply in the early stage, but the scheme cost is higher, and more components are needed for the whole circuit. Therefore, there is a need to provide an LED driving circuit for an electric bicycle lamp to solve the above-mentioned problems.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, and provides an LED driving circuit of an electric bicycle lamp, so as to solve the problems of higher cost and more components required by the whole circuit of the existing LED driving scheme of the electric bicycle lamp.
The utility model provides an LED driving circuit of an electric bicycle lamp, comprising: the device comprises an anti-reverse connection circuit, a linear constant current control circuit, a high beam and low beam switching control circuit and a daytime running light circuit; the direct current power supply is respectively connected with the linear constant current control circuit and the daytime running light circuit through the reverse connection prevention circuit, and the high beam and low beam switching control circuit is connected with the linear constant current control circuit; the linear constant current control circuit comprises a linear constant current control chip U1, an external resistor R6, an external resistor R7 and an external resistor R8; the linear constant current control chip U1 comprises a CS1 pin, a CS2 pin, a VIN pin and a Drain pin; the CS2 pin is respectively connected with the resistor R6, the resistor R7 and the resistor R8; the far and near light switching control circuit comprises a diode D1, a diode D2, a diode D6, an output LED1, an output LED2, an output LED3, an output LED4 and a voltage dividing circuit; the diode D6 is connected with a VIN pin, and the VIN pin is respectively connected with the output LED1 and the output LED 2; the diode D1 is connected with the output LED3 and the output LED4 respectively; the output LEDs 1, 2, 3 and 4 are converged into one path and connected to the Drain pin; the diode D2 is connected with the VIN pin, and the voltage dividing circuit is connected with the CS1 pin.
Further, the reverse connection preventing circuit includes: a diac DB1 and diac DB2, the first input line being connected to diac DB1, diac DB1 being connected to diode D1, diode D6 and GND line, respectively; the second input line is respectively connected with the diode D2 and the voltage dividing circuit; the diac DB2 is connected to the daytime running light circuit.
Further, the daytime running light circuit includes: the solar row LED5, the third input line is connected to the diac DB2, and the diac DB2 is connected to the solar row LED5 and the GND line, respectively.
Further, the voltage dividing circuit includes: the second input line is sequentially connected with the resistor R1, the resistor R2 and the resistor R3 in series, one end of the resistor R4 is connected between the resistor R2 and the resistor R3, and the other end of the resistor R4 is connected to a CS1 pin; the resistor R6, the resistor R7 and the resistor R8 are connected in parallel and are connected between the resistor R3 and the pin CS 2; one end of the resistor R5 is connected to the CS1 pin, and the other end of the resistor R5 is connected to the CS2 pin.
Further, the linear constant current control chip U1 is internally integrated with an operational amplifier, a control unit and a MOSFET.
The utility model has the following beneficial effects: the utility model provides an LED driving circuit of an electric bicycle lamp, which comprises an anti-reverse connection circuit, a linear constant current control circuit, a far and near light switching control circuit and a daytime running light circuit; the direct current power supply is respectively connected with the linear constant current control circuit and the daytime running light circuit through the anti-reverse connection circuit, and the far and near light switching control circuit is connected with the linear constant current control circuit; the circuit has an over-temperature protection function, the reliability of LED driving is improved, and the output current can be automatically regulated after the chip is over-temperature; the standby power consumption is low, and the constant current precision is high; the circuit architecture is simple, the number of components is small, the driving volume is small, the cost is low, the required requirement of the vehicle lamp in the switching power supply period can be met with lower cost, and most of electric vehicle lamp products can be adapted.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a general frame diagram of an LED drive circuit for an electric bicycle lamp in accordance with the present utility model;
fig. 2 is a specific circuit diagram of the LED driving circuit of the electric bicycle lamp of the present utility model.
Illustration of: 100-an anti-reverse connection circuit; 200-a linear constant current control circuit; 300-high beam and low beam switching control circuit; 400-daytime running light circuit.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present utility model will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, thicknesses of layers and regions are exaggerated for clarity, and identical reference numerals are used to denote identical devices, and thus descriptions thereof will be omitted.
Referring to fig. 1 to 2, an embodiment of the present utility model provides an LED driving circuit for an electric bicycle lamp, comprising: the circuit comprises an anti-reverse connection circuit 100, a linear constant current control circuit 200, a high-low beam switching control circuit 300 and a daytime running light circuit 400.
The direct current power supply is respectively connected with the linear constant current control circuit 200 and the daytime running light circuit 400 through the anti-reverse connection circuit 100, the high beam and low beam switching control circuit 300 is connected with the linear constant current control circuit 200, and after direct current voltage is input, the direct current power supply supplies power to the linear constant current control circuit and the daytime running light circuit through the anti-reverse connection circuit and is converted into voltage and current required by the LED lamp.
Specifically, the anti-reverse circuit 100 includes a diac DB1 and a diac DB2, and the diac DB1 and the diac DB2 are used to prevent the positive and negative reverse connections of the input line, thereby protecting the input line. The input lines are divided into a first input line, a second input line, a third input line, and further include a GND line. The first input line is the +12v blue line shown in fig. 2, the second input line is the +12v white line shown in fig. 2, and the third input line is the +12v brown line shown in fig. 2. GND line is a black line shown in fig. 2. The first input line is connected with a diac DB1, and diac DB1 is connected with a diode D1, a diode D6 and a GND line, respectively; the second input line is respectively connected with the diode D2 and the voltage dividing circuit; diac DB2 is connected to daytime running light circuit 400.
The linear constant current control circuit 200 comprises a linear constant current control chip U1, an external resistor R6, an external resistor R7 and an external resistor R8. The linear constant current control chip U1 integrates an operational amplifier, a control unit and a Metal-Oxide-semiconductor field effect transistor (MOSFET), and the linear constant current control chip U1 supports over-temperature protection and analog dimming functions. By controlling the switch of the MOSFET, the accurate output of the current is realized. The MOSFET of the linear constant current control chip U1 comprises a CS1 pin, a CS2 pin, a VIN pin and a Drain pin. The CS2 pin is respectively connected with a resistor R6, a resistor R7 and a resistor R8, and the resistor R6, the resistor R7 and the resistor form an external current limiting resistor. The current can be adjusted through the resistor R6, the resistor R7 and the resistor R8.
The low-and-high beam switching control circuit 300 includes a diode D1, a diode D2, a diode D6, an output LED1, an output LED2, an output LED3, an output LED4, and a voltage dividing circuit; the diode D6 is connected with a VIN pin, and the VIN pin is respectively connected with the output LED1 and the output LED 2; the diode D1 is connected with the output LED3 and the output LED4 respectively; the output LEDs 1, 2, 3 and 4 are converged into one path and connected to the Drain pin; the diode D2 is connected with the VIN pin, and the voltage dividing circuit is connected with the CS1 pin.
The voltage dividing circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a zener diode DZ1, wherein the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series with a second input line, one end of the resistor R4 is connected between the resistor R2 and the resistor R3, and the other end of the resistor R4 is connected to a CS1 pin; the resistor R6, the resistor R7 and the resistor R8 are connected in parallel and are connected between the resistor R3 and the pin CS 2; one end of the resistor R5 is connected to the CS1 pin, and the other end of the resistor R5 is connected to the CS2 pin.
The daytime running light circuit 400 includes a daytime running LED5, and the third input line is connected to a diac DB2, and the diac DB2 is connected to the daytime running LED5 and the GND line, respectively.
The working principle of the LED driving circuit of the electric bicycle lamp is as follows: when the external switch is connected to the blue line, the input current passes through the diac DB1, one path passes through the diode D6 to the VIN pin of the linear constant current control chip U1 to supply power to the IC and half of the output LEDs, and the other path passes through the diode D1 to supply power to the other half of the output LEDs. The currents of the two paths of LEDs are converged into a path of linear constant current control chip U1, namely a Drain pin of a built-in MOSFET (metal oxide semiconductor field effect transistor), namely a D pin in fig. 2, and then flow out to a resistor R6, a resistor R7 and a resistor R8 through a CS2 pin, and then return to the diac DB1 to the black line GND. When the current reaches the set value, the current is constant-current, and the output LEDs 1, 2, 3 and 4 are all lighted at the moment, so as to output high beam. When the external switch is connected to the white line, one path of input current is supplied to the IC and half of the output LEDs through the diode D2 to the VIN pin of the linear constant current control chip U1. The other path is a voltage dividing circuit formed by a resistor R1, a voltage stabilizing diode DZ1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5, and a proper voltage is applied to a CS1 pin of the linear constant current control chip U1, so that the analog dimming function of the linear constant current control chip U1 is realized, the output current of the linear constant current control chip U1 is halved, and the aim of switching between far and near light is fulfilled. When the daytime running light circuit is used, the brown wire is directly connected through the external switch, and current flows through the diac DB2 to the daytime running LED5 and then returns to the diac DB2 to the GND wire.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be capable of being practiced otherwise than as specifically illustrated and described.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. An electric bicycle lamp LED driving circuit, comprising: an anti-reverse connection circuit (100), a linear constant current control circuit (200), a high-low beam switching control circuit (300) and a daytime running light circuit (400); the direct current power supply is respectively connected with the linear constant current control circuit (200) and the daytime running light circuit (400) through the anti-reverse connection circuit (100), and the high-low beam switching control circuit (300) is connected with the linear constant current control circuit (200);
the linear constant current control circuit (200) comprises a linear constant current control chip U1, an external resistor R6, an external resistor R7 and an external resistor R8; the linear constant current control chip U1 comprises a CS1 pin, a CS2 pin, a VIN pin and a Drain pin; the CS2 pin is respectively connected with the resistor R6, the resistor R7 and the resistor R8;
the far-near light switching control circuit (300) comprises a diode D1, a diode D2, a diode D6, an output LED1, an output LED2, an output LED3, an output LED4 and a voltage division circuit; the diode D6 is connected with a VIN pin, and the VIN pin is respectively connected with the output LED1 and the output LED 2; the diode D1 is connected with the output LED3 and the output LED4 respectively; the output LEDs 1, 2, 3 and 4 are converged into one path and connected to the Drain pin; the diode D2 is connected with the VIN pin, and the voltage dividing circuit is connected with the CS1 pin.
2. The electric bicycle lamp LED driving circuit according to claim 1, wherein the anti-reverse circuit (100) comprises: a diac DB1 and diac DB2, the first input line being connected to diac DB1, diac DB1 being connected to diode D1, diode D6 and GND line, respectively; the second input line is respectively connected with the diode D2 and the voltage dividing circuit; the diac DB2 is connected to the daytime running light circuit (400).
3. The electric bicycle lamp LED driving circuit according to claim 2, wherein the daytime running light circuit (400) comprises: the solar row LED5, the third input line is connected to the diac DB2, and the diac DB2 is connected to the solar row LED5 and the GND line, respectively.
4. The electric bicycle lamp LED driving circuit of claim 2, wherein the voltage dividing circuit comprises: the second input line is sequentially connected with the resistor R1, the resistor R2 and the resistor R3 in series, one end of the resistor R4 is connected between the resistor R2 and the resistor R3, and the other end of the resistor R4 is connected to a CS1 pin; the resistor R6, the resistor R7 and the resistor R8 are connected in parallel and are connected between the resistor R3 and the pin CS 2; one end of the resistor R5 is connected to the CS1 pin, and the other end of the resistor R5 is connected to the CS2 pin.
5. The LED driving circuit for an electric bicycle lamp according to claim 1, wherein the linear constant current control chip U1 is internally integrated with an op amp, a control unit and a MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320742650.8U CN219592663U (en) | 2023-04-04 | 2023-04-04 | LED driving circuit of electric bicycle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320742650.8U CN219592663U (en) | 2023-04-04 | 2023-04-04 | LED driving circuit of electric bicycle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219592663U true CN219592663U (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320742650.8U Active CN219592663U (en) | 2023-04-04 | 2023-04-04 | LED driving circuit of electric bicycle lamp |
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|---|---|
| CN (1) | CN219592663U (en) |
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2023
- 2023-04-04 CN CN202320742650.8U patent/CN219592663U/en active Active
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