CN208445788U - Vehicle fog lamp driving circuit - Google Patents

Abstract

The utility model discloses a kind of vehicle fog lamp driving circuits, the first and second LED light and third LED light are driven using LED drive chip and three-terminal regulator chip two-way in this circuit, bi-directional voltage stabilizing diode, 3rd resistor, connection first diode anode after second capacitor is in parallel, then through inductance, capacity cell connects LED drive chip power pins end, first and second resistance one end in parallel connect LED drive chip power pins end, the other end connects LED drive chip light modulation leads ends and concatenated first and second LED light one end, the power input of three-terminal regulator chip connects first diode cathode, 5th with the 6th resistor coupled in parallel and both ends connect three-terminal regulator chip power output end and voltage adjustable side, 7th resistance both ends connect voltage adjustable side and the 3rd LE of three-terminal regulator chip D lamp anode, third LED light cathode ground connection.This driving circuit solves the problems, such as that heat is big in fog lamp use process, power consumption is big, improves fog lamp service life, while keeping vehicle fog lamp moulding more beautiful.

Description

Vehicle fog lamp driving circuit

Technical field

The utility model relates to vehicle fog lamp driving circuits.

Background technique

Vehicle fog lamp is installed on the front and rear of automobile, for illuminating road and safe police in rain and fog weather driving Show, improves the visibility of driver and surrounding traffic participant.Rear Fog Lamp is that the visibility such as to diffuse in mist, rain or dust lower In environment, rear of vehicle other road traffics participant is set to be easy to find vehicle tail, luminous intensity is generally brighter than taillight Red eye.Front fog lamp is installed on the position more slightly lower than headlamp, illuminating road when for rain and fog weather driving, due to mist Its low visibility, pilot's line of vision are restricted, and fog lamp light can increase range ability, and the light of especially yellow Fog-proof light penetrates Power is strong, and the visibility of driver Yu surrounding traffic participant can be improved in it, makes to come vehicle and pedestrian remotely to find other side.

Currently used vehicle fog lamp has halogen lamp and LED light etc..Halogen lamp technology maturation, price is low, and many vehicles are all It using, but there are also insufficient places to have mercury if any radiation, is being easily broken, use process calorific value and power consumption are big, And transport and installation are inconvenient, replacement trouble, service life is generally at 8000 hours or so.And LED lamp have it is pollution-free, without spoke Penetrate, long service life the characteristics of, the theoretical service life at 50,000 hours or more, has had many vehicles to repack fog lamp into LED now Lamp.But since LED light and driving circuit price are higher, there is larger impact to universal use.

Summary of the invention

The technical problem to be solved by the utility model is to provide a kind of vehicle fog lamp driving circuit, this driving circuit overcomes The defect of conventional halogen fog lamp solves the problems, such as that heat is big in fog lamp use process, power consumption is big, and realizes energy conservation and environmental protection, mentions The service life of high fog lamp, while keeping the moulding of vehicle fog lamp more beautiful.

In order to solve the above technical problems, the utility model vehicle fog lamp driving circuit includes vehicle power supply and control unit, Described control unit power input connects vehicle power supply anode, further includes bi-directional voltage stabilizing diode, the first inductance to the Four inductance, first capacitor to the 12nd capacitor, first resistor to the 7th resistance, first diode, the second diode, LED driving Chip, three-terminal regulator chip and the first LED light are to third LED light, the bi-directional voltage stabilizing diode, 3rd resistor, the second capacitor One end connection described control unit output end, other end ground connection after parallel connection, it is single that the first diode anode connects the control First output end, the 11st capacitor both ends are separately connected first diode cathode and ground connection, and the 4th inductance input terminal connects Connect the 11st capacitor both ends, output end connection third capacitor both ends, third capacitor one end connection described first Inductance one end, other end ground connection, the 4th capacitor to the 7th capacitor latter end ground connection in parallel, other end connection first electricity Feel the other end and LED drive chip power pins end, the 4th resistance and the second Diode series and the 4th resistance terminal Connect LED drive chip power pins end, the second diode cathode connects LED drive chip switched pins end, the LED driving Chip dims leads ends and connects LED drive chip power pins end, the first resistor and second resistance through the 6th resistance In parallel and one end connection LED drive chip power pins end, the other end connect the LED drive chip and sample leads ends And the first LED light anode after first LED light and the series connection of the second LED light, the second LED light cathode is successively through third Connecting the second diode cathode after inductance, the second inductance, the 8th capacitor is parallel to second diode both ends, and described One capacitor and the tenth capacitor are parallel to concatenated first LED light and the second LED light both ends, described in the second LED light cathode warp 12nd capacity earth, the power input of the three-terminal regulator chip connect the first diode cathode, the 5th electricity Both ends are separately connected power output end and the voltage adjustable side of three-terminal regulator chip, the 9th electricity after resistance and the 6th resistor coupled in parallel Hold voltage adjustable side, the other end ground connection of one end connection three-terminal regulator chip, the 7th resistance both ends are separately connected described three Hold voltage adjustable side and the third LED light anode of voltage stabilizing chip, third LED light cathode ground connection.

Further, the 7th resistance includes ten Chip-Rs, and described ten Chip-Rs are connected in parallel.

Since the utility model vehicle fog lamp driving circuit uses above-mentioned technical proposal, i.e., the first LED light in this circuit LED drive chip and the driving of three-terminal regulator chip two-way, vehicle power supply warp is respectively adopted with the second LED light and third LED light Control unit is connected to wiring board, is connecting first diode just after bi-directional voltage stabilizing diode, 3rd resistor, the second capacitor are in parallel Then pole connects LED drive chip power pins end, first and second resistance one end connection in parallel through inductance, capacity cell LED drive chip power pins end, other end connection LED drive chip light modulation leads ends and concatenated first LED light and second The power input of LED light one end, three-terminal regulator chip connects first diode cathode, the 5th and the 6th resistor coupled in parallel and two End connection three-terminal regulator chip power output end and voltage adjustable side, the 7th resistance both ends connect the voltage tune of three-terminal regulator chip Save end and third LED light anode, third LED light cathode ground connection.This driving circuit overcomes the defect of conventional halogen fog lamp, solves mist The problem that heat is big in lamp use process, power consumption is big, and realize energy conservation and environmental protection, the service life of fog lamp is improved, while making vehicle The moulding of fog lamp is more beautiful.

Detailed description of the invention

The utility model is described in further detail with embodiment with reference to the accompanying drawing:

Fig. 1 is the utility model vehicle fog lamp drive circuit schematic diagram.

Specific embodiment

Embodiment is as shown in Figure 1, the utility model vehicle fog lamp driving circuit includes vehicle power supply V and control unit K, institute State control unit K power input and connect vehicle power supply V anode, further include bi-directional voltage stabilizing diode S, the first inductance L1 extremely 4th inductance L4, first capacitor C1 are to the 12nd capacitor C12, first resistor R1 to the 7th resistance R7, first diode D1, second Diode D2, LED drive chip U1, three-terminal regulator chip U2 and the first LED light L1 are to third LED light L3, the bi-directional voltage stabilizing One end connection described control unit K output end, other end ground connection, institute after diode S, 3rd resistor R3, the second capacitor C2 are in parallel First diode D1 anode connection described control unit K output end is stated, the both ends the 11st capacitor C11 are separately connected the one or two Pole pipe D1 cathode and ground connection, the 4th inductance L4 input terminal connect described in the both ends the 11st capacitor C11, output end connection The both ends third capacitor C3, described one end third capacitor C3 connect described one end first inductance L1, other end ground connection, the 4th electricity Hold C4 to the 7th capacitor C7 latter end ground connection in parallel, the other end connects the first inductance L1 other end and LED drive chip U1 power pins end VIN, the 4th resistance R4 connects with the second diode D2 and the 4th end resistance R4 connect LED driving core Piece U1 power pins end VIN, the second diode D2 anode connect LED drive chip U1 switched pins end SW, and the LED drives core Piece U1 dims leads ends DIM through the 6th resistance R6 connection LED drive chip U1 power pins end VIN, the first resistor R1 is in parallel with second resistance R2 and one end is connect described in the LED drive chip U1 power pins end VIN, other end connection LED drive chip U1 samples the first LED light L1 after leads ends SEN and the first LED light L1 and the second LED light L2 series connection Anode, the second LED light L2 cathode successively connect the second diode D2 anode, institute after third inductance L3, the second inductance L2 It states the 8th capacitor C8 and is parallel to the both ends the second diode D2, the first capacitor C1 and the tenth capacitor C10 are parallel to series connection The first LED light L1 and the second both ends LED light L2, the second LED light L2 cathode be grounded through the 12nd capacitor C12, institute State the power input VIN connection first diode D1 cathode of three-terminal regulator chip U2, the 5th resistance R5 and the 6th Both ends are separately connected the power output end VOUT and voltage adjustable side ADJ of three-terminal regulator chip U2 after resistance R6 is in parallel, and described the Nine one end capacitor C9 connect the voltage adjustable side ADJ of three-terminal regulator chip U2, other end ground connection, the 7th both ends resistance R7 point The voltage adjustable side ADJ and third LED light L3 anode of the three-terminal regulator chip U2, third LED light L3 cathode ground connection are not connected.

Preferably, the 7th resistance R7 includes ten Chip-Rs, and described ten Chip-Rs are connected in parallel.Ten patches Sheet resistance has simultaneously connected metering function, solves the problems, such as resistance heating first, heat can be made to disperse using ten Chip-Rs, part Temperature will not be too high, the heat of entire mould group is relatively uniform, failure caused by avoiding local temperature too high；Next avoids one Resistance failure cause entire lamp fail the problem of, ten resistance simultaneously connect together, when it is therein all the way or two-way even nine tunnels When resistance failure below, LED light can work, and avoid the problem that lamps and lanterns do not work, it is ensured that traffic safety.

This driving circuit is controlled by control unit, and driving circuit is connected to vehicle power supply by harness and control is single Member, bi-directional voltage stabilizing diode, the second capacitor and 3rd resistor are protection element, and after electric current passes through first diode, a part is logical Enter LED drive chip after crossing the filtering of inductance, capacitance module, and then light the first LED light and the second LED light, then passes through 12nd capacity earth；Another part enters three-terminal regulator chip, and the output electric current of three-terminal regulator chip is through the 5th electricity in parallel Third LED light is lighted after resistance and the 6th resistance and the 7th resistance current limliting.Wherein LED drive chip uses MBI6657QGD-A (SOP-8) chip, three-terminal regulator chip use LM317 chip, improve the stability of driving circuit.

This driving circuit is driven using two-way, can be controlled separately the first LED light of light source, the second LED light and another way Third LED light is lighted simultaneously, realizes two different capacities in the same mould group, the LED light of different brightness while luminous, satisfaction The functional requirement of entire mould group.Overcome traditional fog lamp heating problem, simplifies circuit structure, and failure rate is low, safe and reliable, section It can environmental protection.

This driving circuit normal working voltage 13.5V, 9~26V of operating voltage range, output electric current maintain always 700mA, fog lamp brightness in 9~26V remain unchanged, and realize two different capacities in the same mould group, different bright The LED of degree shines simultaneously.

Claims (2)

1. a kind of vehicle fog lamp driving circuit, including vehicle power supply and control unit, the connection of described control unit power input The vehicle power supply anode, it is characterised in that: further include bi-directional voltage stabilizing diode, the first inductance to the 4th inductance, first capacitor To the 12nd capacitor, first resistor to the 7th resistance, first diode, the second diode, LED drive chip, three-terminal voltage-stabilizing core Piece and the first LED light are to third LED light, and one end connects institute after the bi-directional voltage stabilizing diode, 3rd resistor, the second capacitor are in parallel State control unit output end, other end ground connection, the first diode anode connects described control unit output end, and the described tenth One capacitor both ends are separately connected first diode cathode and ground connection, and the 4th inductance input terminal connects the 11st capacitor two End, output end connect third capacitor both ends, and third capacitor one end connects first inductance one end, another termination Ground, the 4th capacitor to the 7th capacitor latter end ground connection in parallel, the other end connects the first inductance other end and LED drives Dynamic chip power leads ends, the 4th resistance connect LED drive chip electricity with the second Diode series and the 4th resistance terminal Source pin end, the second diode cathode connect LED drive chip switched pins end, the LED drive chip light modulation leads ends warp 6th resistance connects LED drive chip power pins end, and the first resistor is in parallel with second resistance and one end is connect LED drive chip power pins end, the other end connect the LED drive chip sampling leads ends and the first LED The first LED light anode after lamp and the series connection of the second LED light, the second LED light cathode is successively after third inductance, the second inductance The second diode cathode is connected, the 8th capacitor is parallel to second diode both ends, the first capacitor and the tenth electricity Appearance is parallel to concatenated first LED light and the second LED light both ends, the second LED light cathode through the 12nd capacity earth, The power input of the three-terminal regulator chip connects the first diode cathode, the 5th resistance and the 6th resistor coupled in parallel Both ends are separately connected power output end and the voltage adjustable side of three-terminal regulator chip afterwards, and it is steady that described 9th capacitor one end connects three ends Voltage adjustable side, the other end ground connection of chip are pressed, the 7th resistance both ends are separately connected the voltage of the three-terminal regulator chip Adjustable side and third LED light anode, third LED light cathode ground connection.

2. vehicle fog lamp driving circuit according to claim 1, it is characterised in that: the 7th resistance includes ten patches Resistance, described ten Chip-Rs are connected in parallel.