CN208623953U - A kind of driving circuit for the double lamps of automobile lamp - Google Patents
A kind of driving circuit for the double lamps of automobile lamp Download PDFInfo
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- CN208623953U CN208623953U CN201821292834.4U CN201821292834U CN208623953U CN 208623953 U CN208623953 U CN 208623953U CN 201821292834 U CN201821292834 U CN 201821292834U CN 208623953 U CN208623953 U CN 208623953U
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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 proposes a kind of driving circuits for the double lamps of automobile lamp, including full bridge rectifier and filter circuit, driving circuit further include: control circuit, LED drive chip U1, conversion circuit and detection circuit, detection circuit input terminal connects the end high voltage power supply H, its output end connects the input terminal of conversion circuit, and conversion circuit output end connects control circuit, and control circuit output end connects automobile lamp group, one control terminal of LED drive chip U1 connection control circuit, and shine for controlling lamp group.The technical solution of the utility model power input does not distinguish positive and negative anodes connection, pass through conversion circuit and control circuit arbitrary switch control dazzle light group and dipped beam lamp group, in order to be applicable in the dipped beam lamp group of different capacity, the sampling resistor RCS of the different resistance values of change need to only be passed through, it can lamp group is allowed to reach expected constant luminance.
Description
Technical field
The utility model relates to a kind of LED lamp drive circuit, in particular to a kind of driving electricity for the double lamps of automobile lamp
Road.
Background technique
Since the power of present LED lamp of automobile is increasing, originally automobile power supply system provide power limited, stability
It is poor.Since the normal working voltage of vehicle-mounted LED lamp is low pressure, if after vehicle-mounted supply voltage increases, it is originally vehicle-mounted
The driving circuit of LED lamp will be unable to work normally, can not be with the electrical appliance co-used power supply of high-powered automobiles so as to cause LED lamp
, it is desirable to improve the driving circuit of LED lamp, high-powered automobiles lamp can be driven, and to high beam and
Dipped headlight arbitrary switch, stability is more preferable, high safety.
Utility model content
More than solving the problems, such as, it is remote that the utility model provides a kind of driving circuit realization for the double lamps of automobile lamp
Light lamp and dipped headlight facilitate switching, and output voltage stabilization, and lamp group reaches expected constant luminance, and protects driving circuit will not
It is burnt out because of power positive cathode reversal connection.
The utility model discloses a kind of driving circuits for the double lamps of automobile lamp, including full bridge rectifier and connection
The filter circuit of the full bridge rectifier output end, the driving circuit further include: control circuit, LED drive chip, conversion
Circuit and detection circuit, the detection circuit input terminal connect the end high voltage power supply H, and output end connects the defeated of the conversion circuit
Enter end, the conversion circuit output end connects the control circuit, and the control circuit output end connects automobile lamp group, described
LED drive chip connects one control terminal of control circuit, and switches mutually for controlling the lamp group.
Further, the control circuit includes: the first field-effect tube, the second field-effect tube, diode, inductance, first
Resistance and second resistance, the full bridge rectifier output head anode connect the cathode of the diode, the sun of the diode
Pole connects the drain D of first field-effect tube, and the grid G of first field-effect tube connects drawing for the LED drive chip
Foot DVR, the source S of first field-effect tube connect the pin CS of the LED drive chip, described in inductance one end connection
The drain D of first field-effect tube, the other end connect the second field-effect tube source S, and second fet gate connects
Connecing described second resistance one end, the second resistance other end connects the full bridge rectifier output head anode, and described first
Resistance one end connects the second field-effect tube source S, and the other end connects the conversion circuit.
Further, the LED drive chip is chip OCX5121.
Further, the conversion circuit includes: third field-effect tube, diode and 3rd resistor, the third field effect
Should the source S of pipe connect the control circuit, the grid G of the third field-effect tube connects the cathode of the diode, described
The anode of diode connects described 3rd resistor one end, and the other end connects the detection circuit output end, the third field effect
Should the drain D of pipe connect the lamp group.
Further, the detection circuit includes: the 4th resistance, the 5th resistance, the 6th resistance, rectification module and three poles
Pipe, the rectification module input anode connect the end high voltage power supply H, and the rectification module input cathode connects power cathode,
4th resistance connects between the rectification module input anode and cathode both ends, the rectification module output head anode
The 5th resistance is concatenated by the 6th resistance and connects the rectification module negative pole of output end, and the base stage of the triode connects
The common end of the 5th resistance and the 6th resistance is connect, the emitter of the triode is connected to the cathode of the rectification module,
The collector of the triode connects the conversion circuit.
Further, sampling resistor RCS is connected between the LED drive chip pin CS and power cathode.
Further, it is connected with the 7th resistance between the LED drive chip pin VDD and the full bridge rectifier,
Capacitor is connected between the LED drive chip pin VDD and power cathode.
A kind of driving circuit for the double lamps of automobile lamp for implementing the utility model, has technology effect beneficial below
Fruit:
The technical solution of the utility model power input does not distinguish positive and negative anodes connection, passes through conversion circuit and control circuit
Arbitrary switch control dazzle light group and dipped beam lamp group only need to be by changing different resistances in order to be applicable in the lamp group of different capacity
The current sampling resistor RCS of value, it can lamp group is allowed to reach expected constant luminance.
Detailed description of the invention
It, below will be to embodiment in order to illustrate more clearly of the technical solution in the utility model embodiment or current art
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of the driving circuit for the double lamps of automobile lamp of the embodiments of the present invention.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the embodiments of the present invention, a kind of driving circuit for the double lamps of automobile lamp, comprising: full-bridge
The filter circuit 20 of rectification circuit 10 and connection 10 output end of full bridge rectifier, driving circuit further include: control circuit 30,
LED drive chip U1, conversion circuit 40 and detection circuit 50,50 input terminal of detection circuit connect the end high voltage power supply H, output end
The input terminal of conversion circuit 40 is connected, 40 output end of conversion circuit connects control circuit 30, and 30 output end of control circuit connects vapour
Car light group, 30 1 control terminal of LED drive chip U1 connection control circuit, and switch mutually for controlling lamp group.
Control circuit 30 includes: the first field-effect tube Q2, the second field-effect tube Q3, diode SBD7, inductance L1, the first electricity
R6 and second resistance R7 is hindered, full bridge rectifier output head anode connects the cathode of diode SBD7, the anode of diode SBD7
The drain D of the first field-effect tube Q2 is connected, the grid G of the first field-effect tube Q2 connects the pin DVR of LED drive chip U1, the
The pin CS of the source S connection LED drive chip U1 of one field-effect tube Q2,1 one end inductance L connects the first field-effect tube Q2's
Drain D, the other end connect the second field-effect tube Q3 source S, and the second field-effect tube Q3 grid connects 7 one end second resistance R,
7 other end of second resistance R connects 10 output head anode of full bridge rectifier, and the one end first resistor R6 connects the second field-effect tube
Q3 source S, the other end connect conversion circuit 40.
LED drive chip U1 is chip OCX5121.
Conversion circuit 40 includes: third field-effect tube Q 4, diode D2 and 3rd resistor R5, third field-effect tube Q's 4
Source S connects control circuit 30, the cathode of the grid G connection diode D2 of third field-effect tube Q 4, and the anode of diode D2 connects
The one end 3rd resistor R5 is connect, the drain D of 50 output end of other end connection detection circuit, third field-effect tube Q 4 connects lamp group.
Detection circuit 50 includes: the 4th resistance R2, the 5th resistance R3, the 6th resistance R4, rectifier module D 1 and triode Q1,
1 input anode of rectifier module D connects the end high voltage power supply H, and 1 input cathode of rectifier module D connects power cathode, the 4th resistance
Between 1 input anode of R2 connection rectifier module D and cathode both ends, 1 output head anode of rectifier module D is concatenated by the 6th resistance R4
5th resistance R3 connection rectifier module D, 1 negative pole of output end, base stage connection the 5th resistance R3's and the 6th resistance R4 of triode Q1
Common end, the emitter of triode Q1 are connected to the cathode of rectifier module D 1, and the collector of triode Q1 connects conversion circuit 40.
Sampling resistor RCS is connected between LED drive chip U1 pin CS and power cathode.
The 7th resistance R 1, LED drive chip U1 are connected between LED drive chip U1 pin VDD and full bridge rectifier
Capacitor C2 is connected between pin VDD and power cathode.
Further illustrate the working principle of the technical program:
(regardless of positive and negative anodes) behind the end E and the end L input voltage and electric current, by tetra- Xiao of SBD1, SBD2, SBD3, SBD4
The full-bridge rectification of special based diode composition, the end V+ voltage are anode, are added to the filtering of the both ends capacitor C1, are then divided into two-way, all the way
By L lamp group, Q3 FET drain D (NMOS is same as below), since R7 provides conducting voltage to the grid G of Q3, electric current from
The source S of Q3 flows out to inductance L1, then arrives above the drain D of Q2.Q2 source S connects power supply by current sampling resistor RCS and bears
Pole, the grid G that the signal on current sampling resistor is then input to 6 foot CS, Q2 field-effect metal-oxide-semiconductor of chip connect the 1 of chip OC5121
Foot DRV.Another way then pass through resistance R1 decompression, be diverted on the 4 foot VDD of chip OC5121, to chip provide operating voltage and
Electric current, C2 are high-frequency filter capacitor.Chip work once electrified, 1 foot DRV of chip output are high level, the conducting of Q2 field-effect tube.Electric current
By L lamp group, Q3 field-effect tube, L1 inductance, Q2 field-effect tube, current sampling resistor RCS, it is formed into a loop to power cathode, L lamp
Group can work normally bright light.As the working time increases, when the crest voltage on current sampling resistor RCS reaches chip
After the voltage of OC5121 internal error amplifier setting, chip interior control circuit makes 1 foot DRV output become low level,
Turn off Q2 field-effect tube.When Q2 field-effect tube is in an off state, due to the effect of inductive energy storage, electric current passes through L lamp group, Q3
Field-effect tube (R7 provides conducting voltage), 7 freewheeling diode of L1 inductance, Q2 field-effect tube and SBD, composition loop is to energy storage electricity
Feel L1 electric discharge.L lamp group continues to be lit work.When chip is after a switch periods terminate, chip interior clock enabling signal
It obtains metal-oxide-semiconductor and is transferred on state again, and repeat the above conducting and turn off process always, L lamp group can continually and steadily just
It is always on lamp work.In order to be applicable in the L lamp group of different capacity, it need to only pass through the current sampling resistor RCS of the different resistance values of change
To allow L lamp group to reach expected constant luminance.
(regardless of positive and negative anodes) behind the end E and the end H input voltage and electric current, by tetra- Xiao of SBD1, SBD2, SBD5, SBD6
The full-bridge rectification of special based diode composition, the end V+ voltage are anode, are added to the filtering of the both ends capacitor C1, but due at the end E and H and having
The H lamp group detection circuit for access of D1 full-bridge rectification, R2, R3, R4, Q1, R5 and D2 composition is provided to the grid G of Q4 field-effect tube
Conducting voltage Q4 conducting.Electric current through H lamp group, Q4 field-effect tube, energy storage inductor L1, Q2 field-effect tube, current sampling resistor RCS,
It is formed into a loop to power cathode, H lamp group bright light, detailed operation is identical with the work of L lamp group.Since Q4 is connected, effect on the scene is connect
Should the end the R7 voltage for providing voltage to Q3 fet gate G above pipe Q4 drain D be pulled low, the cut-off of Q3 field-effect tube, L lamp
Group is gone out.To realize the switch operating of L lamp group and H lamp group light on and off.
A kind of driving circuit for the double lamps of automobile lamp for implementing the utility model, has technology effect beneficial below
Fruit:
The technical solution of the utility model power input does not distinguish positive and negative anodes connection, passes through conversion circuit and control circuit
Arbitrary switch control dazzle light group and dipped beam lamp group only need to be by changing different resistances in order to be applicable in the lamp group of different capacity
The current sampling resistor RCS of value, it can lamp group is allowed to reach expected constant luminance.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of driving circuit for the double lamps of automobile lamp, including full bridge rectifier and to connect the full bridge rectifier defeated
The filter circuit of outlet, which is characterized in that the driving circuit further include: control circuit, LED drive chip (U1), conversion electricity
Road and detection circuit, the detection circuit input terminal connect the end high voltage power supply H, and output end connects the input of the conversion circuit
End, the conversion circuit output end connect the control circuit, and the control circuit output end connects automobile lamp group, the LED
Driving chip (U1) connects one control terminal of control circuit, and switches mutually for controlling the lamp group.
2. driving circuit according to claim 1, which is characterized in that the control circuit includes: the first field-effect tube
(Q2), the second field-effect tube (Q3), diode (SBD7), inductance (L1), first resistor (R6) and second resistance (R7) are described complete
Bridge rectification circuit output head anode connects the cathode of the diode (SBD7), described in the anode connection of the diode (SBD7)
The grid G of the drain D of first field-effect tube (Q2), first field-effect tube (Q2) connects the LED drive chip (U1)
Pin DVR, the source S of first field-effect tube (Q2) connect the pin CS of the LED drive chip (U1), the inductance
(L1) one end connects the drain D of first field-effect tube (Q2), and the other end connects the second field-effect tube (Q3) source electrode
S, the second field-effect tube (Q3) grid connect described second resistance (R7) one end, second resistance (R7) other end connection
The full bridge rectifier output head anode, described first resistor one end (R6) connect the second field-effect tube (Q3) source S,
Its other end connects the conversion circuit.
3. driving circuit according to claim 1, which is characterized in that the LED drive chip(U1)For chip
OCX5121。
4. driving circuit according to claim 1, which is characterized in that the conversion circuit includes: third field-effect tube
(Q4), the source S of diode (D2) and 3rd resistor (R5), the third field-effect tube (Q4) connects the control circuit, institute
The grid G for stating third field-effect tube (Q4) connects the cathode of the diode (D2), and the anode of the diode (D2) connects institute
The one end 3rd resistor (R5) is stated, the other end connects the detection circuit output end, the drain D of the third field-effect tube (Q4)
Connect the lamp group.
5. driving circuit according to claim 1, which is characterized in that the detection circuit includes: the 4th resistance (R2),
Five resistance (R3), the 6th resistance (R4), rectification module (D1) and triode (Q1), rectification module (D1) input anode connect
Connect the end high voltage power supply H, rectification module (D1) input cathode connects power cathode, described in the 4th resistance (R2) connection
Between rectification module (D1) input anode and cathode both ends, rectification module (D1) output head anode passes through the 6th resistance
(R4) it concatenates the 5th resistance (R3) and connects rectification module (D1) negative pole of output end, the base stage of the triode (Q1) connects
The common end of the 5th resistance (R3) and the 6th resistance (R4) is connect, the emitter of the triode (Q1) is connected to the rectification
The collector of the cathode of module (D1), the triode (Q1) connects the conversion circuit.
6. driving circuit according to claim 1, which is characterized in that LED drive chip (U1) the pin CS and power supply
Sampling resistor (RCS) is connected between cathode.
7. driving circuit according to claim 1, which is characterized in that LED drive chip (U1) the pin VDD with it is described
It is connected with the 7th resistance (R1) between full bridge rectifier, connects between LED drive chip (U1) the pin VDD and power cathode
It is connected to capacitor (C2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821292834.4U CN208623953U (en) | 2018-08-02 | 2018-08-02 | A kind of driving circuit for the double lamps of automobile lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821292834.4U CN208623953U (en) | 2018-08-02 | 2018-08-02 | A kind of driving circuit for the double lamps of automobile lamp |
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| Publication Number | Publication Date |
|---|---|
| CN208623953U true CN208623953U (en) | 2019-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821292834.4U Active CN208623953U (en) | 2018-08-02 | 2018-08-02 | A kind of driving circuit for the double lamps of automobile lamp |
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| Country | Link |
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| CN (1) | CN208623953U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111970791A (en) * | 2020-08-27 | 2020-11-20 | 浙江阳光美加照明有限公司 | Drive circuit for lamp strip random serial connection |
| CN112738939A (en) * | 2020-12-24 | 2021-04-30 | 深圳市裕富照明有限公司 | Double-circuit control electronic device for car lamp illumination |
-
2018
- 2018-08-02 CN CN201821292834.4U patent/CN208623953U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111970791A (en) * | 2020-08-27 | 2020-11-20 | 浙江阳光美加照明有限公司 | Drive circuit for lamp strip random serial connection |
| CN112738939A (en) * | 2020-12-24 | 2021-04-30 | 深圳市裕富照明有限公司 | Double-circuit control electronic device for car lamp illumination |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510080 third floor, No. 4-6, South Street, xinkeshang village, JUNHE street, Baiyun District, Guangzhou, Guangdong Province Patentee after: Guangzhou Weibo Intelligent Technology Co.,Ltd. Address before: 3 / F, no.4-6, South Street, xinkeshang village, JUNHE street, Baiyun District, Guangzhou, Guangdong 510000 Patentee before: GUANGZHOU WEIBO ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |