CN105372604B - A kind of LED car lamp test circuit with overheat protector instruction - Google Patents
A kind of LED car lamp test circuit with overheat protector instruction Download PDFInfo
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- CN105372604B CN105372604B CN201510527884.0A CN201510527884A CN105372604B CN 105372604 B CN105372604 B CN 105372604B CN 201510527884 A CN201510527884 A CN 201510527884A CN 105372604 B CN105372604 B CN 105372604B
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Abstract
The present invention provides a kind of LED car lamps with overheat protector instruction to test circuit; including inputting anti-reverse and voltage conversion circuit; thermal-shutdown circuit, PWM waveform occur circuit, orange excess temperature indicator light its; the exportable two-way PWM waveform of circuit and four road DC voltages; when the circuit be applied to closed box in, can detecting real-time circuit board environment temperature, when closed box environment temperature be more than setting value when; thermal-shutdown circuit starting closes PWM waveform and electricity point bright orange excess temperature indicator light occurs.
Description
Technical field
The present invention relates to technical field of automobile accessories more particularly to a kind of LED car lamp with overheat protector instruction to test electricity
Road.
Background technique
Along with the rapid development of automobile industry, car light technology also has variation with rapid changepl. never-ending changes and improvements, and PWM technology is even more more next
It is more commonly used for car light field and car light testing field, traditional when testing car light, the temperature of real-time monitoring circuit plate
Degree, when being more than set temperature threshold value, component will receive high temperature damage, short circuit, open circuit etc., and then can not protect Devices to test vehicle
Lamp, therefore solve the problems, such as this kind of be particularly important.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of LED car lamps with overheat protector instruction to test circuit, gathers around
Have the characteristics that of simple structure and low cost and safe and reliable.
In order to solve the problems, such as above-mentioned background technique, the present invention provides a kind of LED car lamp surveys with overheat protector instruction
Circuit is tried, includes to input anti-reverse and voltage conversion circuit, thermal-shutdown circuit, PWM waveform circuit and orange occurs
Excess temperature indicator light LD1, the anti-reverse and voltage conversion circuit of the input is by inputting anti-reverse diode D1, voltage conversion chip
IC1 and input/output terminal filter capacitor composition, the thermal-shutdown circuit is by voltage-stabiliser tube DZ1, temperature sensor RT1 and triode
T1 composition, the orange excess temperature indicator light LD1 are connected to PWM waveform and occur on circuit, and the anti-reverse and voltage of the input turns
Four feet for changing the output end of the voltage conversion chip IC1 of circuit are connected to circuit occurs for PWM waveform resistance R5 and resistance R7 public affairs
It holds altogether, be provided with third foot on the chip U1 of PWM waveform generation circuit and be connected to the grid of metal-oxide-semiconductor M1, the metal-oxide-semiconductor M1's
Drain electrode is connected to power end 12V, and one end temperature sensor RT1 of the thermal-shutdown circuit is connected to the ground, and the other end is connected to
Triode T1 base stage, the collector of the triode T1 are connected to the cathode of orange excess temperature indicator light LD1, and the orange excess temperature refers to
Show that the anode of lamp LD1 is connected to the RST end feet that the chip U1 of circuit occurs for PWM waveform.
Further improvement lies in that: it is described to input the chip that anti-reverse and voltage conversion circuit is PWM waveform generation circuit
U1 provides operating voltage, and chip U1 can produce the rectangular wave of fixed duty cycle and frequency, the rectangular wave by chip U1 third
Foot output.
The beneficial effects of the present invention are: the exportable two-way PWM waveform of circuit of the invention and four road DC voltages, when described
Circuit be applied to closed box in, can detecting real-time circuit board environment temperature, when closed box environment temperature be more than setting value when,
Thermal-shutdown circuit starting closes PWM waveform and circuit occurs, and puts bright orange excess temperature indicator light.The present invention is cleverly tested in PWM
Thermal-shutdown circuit and orange LED excess temperature indicator light are increased on circuit board, are successfully avoided and are damaged circuit because temperature is excessively high
The phenomenon that panel element and then damage Devices to test car light.
Detailed description of the invention
Fig. 1 is that input of the invention is anti-reverse and voltage conversion circuit.
Fig. 2 is thermal-shutdown circuit figure of the invention.
Fig. 3 is that circuit and orange excess temperature indicator light circuit figure occur for PWM waveform of the invention.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the examples below, the embodiment
For explaining only the invention, it is not intended to limit the scope of the present invention..
As shown in Figure 1, 2, 3, a kind of LED car lamp test circuit with overheat protector instruction is present embodiments provided, it is special
Sign is: including to input anti-reverse and voltage conversion circuit, thermal-shutdown circuit, PWM waveform circuit and orange occurs
Excess temperature indicator light LD1, the anti-reverse and voltage conversion circuit of the input is by inputting anti-reverse diode D1, voltage conversion chip
IC1 and input/output terminal filter capacitor composition, the orange excess temperature indicator light LD1 is connected to PWM waveform and occurs on circuit, institute
It states and inputs four feet of the output end of anti-reverse and voltage conversion circuit voltage conversion chip IC1 and be connected to PWM waveform
The common end resistance R5 and resistance R7 of circuit, PWM waveform occur to be provided with third foot on the chip U1 of circuit and be connected to metal-oxide-semiconductor
The grid of M1, the drain electrode of the metal-oxide-semiconductor M1 is connected to power end 12V, and when metal-oxide-semiconductor M1 is connected, drain electrode approximately ground, has in LED
Electric current, which flows through, to be lighted, and when metal-oxide-semiconductor M1 is turned off, drain electrode and ground are disconnected, and no current flows through in LED, and LED extinguishes.The overheat protector
Circuit is made of voltage-stabiliser tube DZ1, temperature sensor RT1 and triode T1, when the circuit system temperature is increased to given threshold,
Temperature sensor RT1 resistance value can become larger, RT1 point voltage increases, the one end temperature sensor RT1 is connected to the ground, other end connection
To triode T1 base stage, triode T1 conducting, the collector of the triode T1 is connected to the negative of orange excess temperature indicator light LD1
Pole, the RST end feet that the anode of the orange excess temperature indicator light LD1 is connected to the chip U1 that circuit occurs for PWM waveform work as triode
When conducting, LD1 cathode approximately ground, has electric current to flow through in LD1, and LD1 issues orange-colored light, high temperature instruction.Chip U1 the 4th in Fig. 2
Approximately ground, PWM chip stops working at the end foot RST.When circuit system temperature is reduced to given threshold or less, temperature sensor
RT1 resistance value reduces, and gets voltage reduction, triode T1 cut-off, and LD1 cathode and ground disconnect, and no current flows through in LD1, orange finger
Show that LED extinguishes, the 4th end foot RST of chip and ground disconnect in Fig. 2, and chip is resumed work.
The anti-reverse and voltage conversion circuit of the input provides operating voltage for the chip U1 that circuit occurs for PWM waveform,
Chip U1 can produce the rectangular wave of fixed duty cycle and frequency, which is exported by the third foot of chip U1.
The exportable two-way PWM waveform of circuit of the invention and four road DC voltages, when the circuit is applied to closed box
It is interior, can detecting real-time circuit board environment temperature, when closed box environment temperature be more than setting value when, thermal-shutdown circuit starting,
It closes PWM waveform and circuit occurs, put bright orange excess temperature indicator light.The present invention cleverly increased on PWM test circuit board
Temperature protection circuit and orange LED excess temperature indicator light, successfully avoid because temperature is excessively high damage circuit board component so that damage to
The phenomenon that measurement equipment car light.
Claims (2)
1. a kind of LED car lamp with overheat protector instruction tests circuit, it is characterised in that: include to input anti-reverse and voltage
Circuit and orange excess temperature indicator light LD1 occur for conversion circuit, thermal-shutdown circuit, PWM waveform, the input it is anti-reverse with
And voltage conversion circuit is formed by inputting anti-reverse diode D1, voltage conversion chip IC1 and input/output terminal filter capacitor, institute
It states thermal-shutdown circuit to be made of voltage-stabiliser tube DZ1, temperature sensor RT1 and triode T1, the orange excess temperature indicator light LD1 connects
It connects and occurs on circuit in PWM waveform, the output end of anti-reverse and voltage conversion circuit the voltage conversion chip IC1 of input
Four feet be connected to PWM waveform occur circuit the common end resistance R5 and resistance R7, PWM waveform occur circuit chip U1 on set
It is equipped with third foot and is connected to the grid of metal-oxide-semiconductor M1, the drain electrode of the metal-oxide-semiconductor M1 is connected to power end 12V, the overheat protector
One end temperature sensor RT1 of circuit is connected to the ground, and the other end is connected to triode T1 base stage, the collector of the triode T1
It is connected to the cathode of orange excess temperature indicator light LD1, the anode of the orange excess temperature indicator light LD1 is connected to PWM waveform and electricity occurs
The RST end feet of the chip U1 on road.
2. a kind of LED car lamp with overheat protector instruction as described in claim 1 tests circuit, it is characterised in that: described defeated
Enter the chip U1 that for PWM waveform circuit occurs for anti-reverse and voltage conversion circuit and operating voltage is provided, chip U1 can produce
The rectangular wave of fixed duty cycle and frequency, the rectangular wave are exported by the third foot of chip U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527884.0A CN105372604B (en) | 2015-08-25 | 2015-08-25 | A kind of LED car lamp test circuit with overheat protector instruction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527884.0A CN105372604B (en) | 2015-08-25 | 2015-08-25 | A kind of LED car lamp test circuit with overheat protector instruction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105372604A CN105372604A (en) | 2016-03-02 |
| CN105372604B true CN105372604B (en) | 2019-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510527884.0A Active CN105372604B (en) | 2015-08-25 | 2015-08-25 | A kind of LED car lamp test circuit with overheat protector instruction |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959880A (en) * | 2019-03-20 | 2019-07-02 | 苏州巨擎电子科技有限公司 | A kind of program-controlled car light group lights detection device |
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| CN201171240Y (en) * | 2008-03-05 | 2008-12-24 | 黄鸣 | LED constant-current driver with temperature protection |
| CN202455581U (en) * | 2012-02-21 | 2012-09-26 | 四川虹视显示技术有限公司 | Lighting device with OLED (Organic Light Emitting Diode) driven by PWM (Pulse Width Modulation) |
| CN102944303A (en) * | 2012-11-15 | 2013-02-27 | 创天昱科技(深圳)有限公司 | PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method |
| TWM448608U (en) * | 2012-09-28 | 2013-03-11 | zhong-qi Liu | LED lamp set with over-temperature protection function |
| CN103424582A (en) * | 2012-05-17 | 2013-12-04 | 富泰华工业（深圳）有限公司 | Battery analog circuit |
| CN103995224A (en) * | 2014-04-18 | 2014-08-20 | 安徽兆利光电科技有限公司 | LED detection system |
| CN204349432U (en) * | 2014-12-17 | 2015-05-20 | 广州金升阳科技有限公司 | A kind of Switching Power Supply thermal-shutdown circuit |
| CN204989433U (en) * | 2015-08-25 | 2016-01-20 | 马瑞利汽车零部件(芜湖)有限公司 | Take LED car light test circuit of excess temperature protection instruction |
-
2015
- 2015-08-25 CN CN201510527884.0A patent/CN105372604B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201171240Y (en) * | 2008-03-05 | 2008-12-24 | 黄鸣 | LED constant-current driver with temperature protection |
| CN202455581U (en) * | 2012-02-21 | 2012-09-26 | 四川虹视显示技术有限公司 | Lighting device with OLED (Organic Light Emitting Diode) driven by PWM (Pulse Width Modulation) |
| CN103424582A (en) * | 2012-05-17 | 2013-12-04 | 富泰华工业（深圳）有限公司 | Battery analog circuit |
| TWM448608U (en) * | 2012-09-28 | 2013-03-11 | zhong-qi Liu | LED lamp set with over-temperature protection function |
| CN102944303A (en) * | 2012-11-15 | 2013-02-27 | 创天昱科技(深圳)有限公司 | PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method |
| CN103995224A (en) * | 2014-04-18 | 2014-08-20 | 安徽兆利光电科技有限公司 | LED detection system |
| CN204349432U (en) * | 2014-12-17 | 2015-05-20 | 广州金升阳科技有限公司 | A kind of Switching Power Supply thermal-shutdown circuit |
| CN204989433U (en) * | 2015-08-25 | 2016-01-20 | 马瑞利汽车零部件(芜湖)有限公司 | Take LED car light test circuit of excess temperature protection instruction |
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| Publication number | Publication date |
|---|---|
| CN105372604A (en) | 2016-03-02 |
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Effective date of registration: 20191224 Address after: No.231 Hai'an Road, Changchun Economic and Technological Development Zone, Changchun City, 130000 Jilin Province Patentee after: Changchun Marelli automobile lighting system Co., Ltd Address before: 241000 No. 5 Gate Road, Shiqiao Industrial Park, Wuhu economic and Technological Development Zone, Anhui, China Patentee before: Marelli Automotive Parts (Wuhu) Co., Ltd. |
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| TR01 | Transfer of patent right |