CN105262334B - A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip - Google Patents
A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip Download PDFInfo
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- CN105262334B CN105262334B CN201510774748.1A CN201510774748A CN105262334B CN 105262334 B CN105262334 B CN 105262334B CN 201510774748 A CN201510774748 A CN 201510774748A CN 105262334 B CN105262334 B CN 105262334B
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Abstract
The present invention relates to a kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip, the defect of pretreatment judgement can not be carried out compared with prior art for the output voltage of Vehicular direct-current converter by solving.The opto-coupled feedback circuit of the present invention includes optocoupler U1, comparator U3A 1 pin is connected on optocoupler U1 3 pins, optocoupler U1 1 pin is concatenated on the output voltage by resistance R5, optocoupler U1 5 pins and 6 pins simultaneously access voltage stabilizing chip mode port TR after connecing by resistance R11, optocoupler U1 4 pin ground wire GND1, supply voltage VCC is sequentially connected in series ground wire GND1 after resistance R1 and resistance R13, and voltage stabilizing chip mode port TR is attempted by between resistance R1 and resistance R13.The present invention can judge triggering voltage stabilizing chip mode of operation according to output voltage.
Description
Technical field
It is specifically a kind of to be used for Vehicular direct-current converter intelligence the present invention relates to Vehicular direct-current converter technical field
The triggering decision circuitry of precision voltage stabilizing chip.
Background technology
In electric automobile, all 12V power utilization networks are to be converted by vehicle 12V lead-acid accumulators by Vehicular direct-current
Device（DC/DC Convertor）Power supply, that is to say, that while Vehicular direct-current converter is to vehicle 12V lead acid battery charges
Also powered to vehicle 12V power utilization networks, this output voltage required precision to Vehicular direct-current converter is very high.If vehicle-mounted straight
The output voltage precision of current converter is too low, it will occur that output voltage is higher or relatively low phenomenon, will cause vehicle 12V power networks
The supply voltage of network is higher or relatively low, it will directly affect the normal work of 12V power utilization networks, such as car light, and instrument board, power-assisted turns
To device, whole-control system etc., the irregular working of these equipment will directly affect traffic safety.Due to traditional circuit knot
Structure is difficult to reach high-precision requirement, currently in order to the high-precision control of output voltage can be reached, using intelligent Precision voltage stabilizing
Chip coordinates corresponding software to carry out precision regulation, triggers intelligent Precision voltage stabilizing chip in time when needing precise pressure regulation, to touching
The accurate voltage stabilizing work of hair intelligent Precision voltage stabilizing chip is pre-processed.So how to the output voltage of Vehicular direct-current converter
Carry out the accurate technical problem for judging to have become urgent need solution.
The content of the invention
The invention aims to solve not carrying out for the output voltage of Vehicular direct-current converter in the prior art
The defect judged is pre-processed to solve there is provided a kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip
Certainly above mentioned problem.
To achieve these goals, technical scheme is as follows：
A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip, including reference voltage electricity
Road, comparison circuit and opto-coupled feedback circuit, described comparison circuit include comparator U3A, and comparator U3A 8 pins are connected on defeated
Go out on voltage, comparator U3A 4 pin ground wire GND2, comparator U3A 3 pins connect reference voltage circuit, output voltage according to
Ground wire GND2 after secondary series resistor R10, resistance R8 and resistance R9, comparator U3A 2 pins are attempted by resistance R8 and resistance R9
Between；
Opto-coupled feedback circuit includes optocoupler U1, and comparator U3A 1 pin is connected on optocoupler U1 3 pins, and the 1 of optocoupler U1
Pin is concatenated on the output voltage by resistance R5, and optocoupler U1 5 pins and 6 pins simultaneously access voltage stabilizing after connecing by resistance R11
Chip mode port TR, optocoupler U1 4 pin ground wire GND1, supply voltage VCC is sequentially connected in series resistance R1 and resistance R13 is followed by
Ground wire GND1, voltage stabilizing chip mode port TR is attempted by between resistance R1 and resistance R13.
Described reference voltage circuit includes the adjustable shunt regulator U2 in three ends, three ends are adjustable shunt regulator U2 negative electrode
It is connected by resistance R12 with output voltage, three ends are adjustable shunt regulator U2 plus earth line GND2, three ends are adjustable and joint debugging
Section device U2 negative electrode and reference edge short circuit is followed by reference voltage Vref, and reference voltage Vref is connected on comparator U3A 3 pins.
Also include loop compensation circuit, loop compensation circuit includes resistance R6 and electric capacity C22, and resistance R6 one end is attempted by electricity
Hinder on R5, the resistance R6 other end is attempted by optocoupler U1 3 pins, and electric capacity C22 is connected between resistance R6 and resistance R8；Electric capacity
C6 is connected with resistance R7, and the electric capacity C6 other end is attempted by electric capacity C22, and the resistance R7 other end is attempted by resistance R8.
Between described comparator U3A 8 pins and 4 pins and it is connected to electric capacity C21, described resistance R8 two ends are simultaneously connected to
Electric capacity C20.
Described resistance R10 resistance is 5.1K, and resistance R8 resistance is 33K, and resistance R9 resistance is 10K.
Beneficial effect
A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip of the present invention, with existing skill
Art, when output voltage is higher or relatively low, passes through compared to that can be judged to trigger the mode of operation of voltage stabilizing chip according to output voltage
Comparison circuit and opto-coupled feedback circuit, change TR magnitude of voltage, so that the different working modes for triggering voltage stabilizing chip reach control
The purpose of voltage, controls the output voltage precision of voltage regulation, greatly improves the stability of output voltage, reduce driving hidden danger.
Brief description of the drawings
Fig. 1 is circuit structure diagram of the invention.
Embodiment
To make to have a better understanding and awareness to architectural feature of the invention and the effect reached, to preferably
Embodiment and accompanying drawing coordinate detailed description, are described as follows：
As shown in figure 1, a kind of triggering for Vehicular direct-current converter intelligent Precision voltage stabilizing chip of the present invention is sentenced
Deenergizing, including reference voltage circuit, comparison circuit and opto-coupled feedback circuit.Reference voltage circuit is used to produce reference voltage,
Supplying comparison circuit and carrying out voltage ratio is used to reference voltage being compared with virtual voltage compared with, comparison circuit, according to comparing knot
Fruit judges whether to trigger opto-coupled feedback circuit, so as to trigger the different working modes of intelligent Precision voltage stabilizing chip.
Reference voltage circuit includes the adjustable shunt regulator U2 in three ends, and three ends are adjustable shunt regulator U2 negative electrode passes through electricity
Resistance R12 is connected with output voltage, three ends are adjustable shunt regulator U2 plus earth line GND2, and plus earth line GND2 is low electricity
Crimping ground, for electronic component ground connection.Three ends are adjustable shunt regulator U2 negative electrode and reference edge short circuit is followed by reference voltage
Vref, the output port that reference voltage Vref is judged for supply comparison circuit, reference voltage Vref is connected on comparator U3A's
On 3 pins.By the adjustable shunt regulator U2 in three ends regulation, when output voltage is not zero, that is, when producing output voltage, three
Adjustable shunt regulator U2 is held to export 2.495V reference voltage after adjusting from reference voltage Vref, so that comparator U3A is carried out
Multilevel iudge.
Comparison circuit includes comparator U3A, and comparator U3A 8 pins connect on the output voltage, comparator U3A 4 pins
Ground wire GND2.Comparator U3A 3 pins connect reference voltage circuit, i.e. reference voltage Vref.Output voltage series resistor R10,
Ground wire GND2 after resistance R8 and resistance R9, so as to form bleeder circuit.Comparator U3A 2 pins are attempted by resistance R8 and electricity
Hinder between R9, resistance R10, resistance R8 and resistance R9 resistance are 5.1K, 33K and 10K respectively, and output voltage normal value is 12V,
Resistance R10, resistance R8 and resistance R9 are carried out after partial pressure to output voltage, and the voltage that resistance R9 divides is 2.4948V, with reference electricity
Press Vref carry out voltage ratio compared with.
Opto-coupled feedback circuit is used for the different working modes for judging main control chip, including optocoupler U1.Draw the 1 of comparator U3A
Pin is connected on optocoupler U1 3 pins, and optocoupler U1 3 pins are negative pole, and comparator U3A is to reference voltage Vref and output voltage
Judged result is exported to 3 pins in optocoupler U1.Optocoupler U1 1 pin is positive pole, by resistance R5 concatenations on the output voltage.
Optocoupler U1 5 pins and 6 pins simultaneously access voltage stabilizing chip mode port TR, voltage stabilizing chip mode port after connecing by resistance R11
TR is the model selection port of intelligent Precision voltage stabilizing chip, and voltage stabilizing chip mode port TR is divided to high voltage and low-voltage two kinds of shapes
State, according to the design of intelligent Precision voltage stabilizing chip, the power supply fine setting pattern of high voltage correspondence intelligent Precision voltage stabilizing chip, low-voltage
The current regulation mode of correspondence intelligent Precision voltage stabilizing chip.Optocoupler U1 4 pin ground wire GND1, ground wire GND1 connect for high voltage
Ground.Ground wire GND1 after supply voltage VCC series resistors R1 and resistance R13, voltage stabilizing chip mode port TR are attempted by resistance R1
Between resistance R13, for when optocoupler U1 ends, high voltage to be conveyed to voltage stabilizing chip mode port TR.
In order to increase the stability of circuit, it is ensured that the magnitude of voltage after resistance R10, resistance R8 and resistance R9 partial pressures is not in
Fluctuation on a large scale, it is to avoid cause optocoupler U1 to end repeatedly, turn on repeatedly.Loop compensation circuit, loop compensation can also be included
Circuit includes resistance R6 and electric capacity C22.Resistance R6 one end is attempted by resistance R5, and the resistance R6 other end is attempted by optocoupler U1's
On 3 pins, electric capacity C22 is connected between resistance R6 and resistance R8, resistance R5, resistance R6, electric capacity C22, resistance R8, resistance R10 shapes
Into a series loop.Electric capacity C6 connects with resistance R7, and electric capacity C6 and electric capacity C22 equally play pressure stabilization function, and electric capacity C6's is another
One end is attempted by electric capacity C22, and the resistance R7 other end is attempted by resistance R8, electric capacity C6, electric capacity C22 and resistance R7 formation one
Individual series loop.Similarly, can also between comparator U3A 8 pins and 4 pins shunt-wound capacitance C21, described resistance R8 two
Shunt-wound capacitance C20 is held, filter action is played by electric capacity C21 and electric capacity C20.
In practical application, in the case of ordinary circumstance or output voltage are relatively low, in reference voltage circuit, output voltage
2.495V reference voltage is produced after the adjustable shunt regulator U2 regulations in three ends.In comparison circuit, output voltage passes through
The magnitude of voltage and 2.495V reference voltage that resistance R10, R8 and R9 partial pressure is obtained are compared in comparator U3A, then export electricity
The magnitude of voltage obtained by resistance R10, R8 and R9 partial pressure is pressed to be less than or equal to the benchmark electricity from the adjustable shunt regulator U2 in three ends
Pressure.Comparator U3A exports the negative electrode of high level, i.e. optocoupler U1（3 ports）And anode（1 port）Two ends are high voltage, now
Optocoupler is not turned on.Supply voltage VCC powers directly to voltage stabilizing chip mode port TR, i.e., now voltage stabilizing chip mode port TR electricity
Press as height, then corresponding intelligent Precision voltage stabilizing chip belongs to power supply fine setting pattern, passes through the software in intelligent Precision voltage stabilizing chip
Design causes voltage to realize accurate pressure control, and output voltage is in dynamic equilibrium, maintains output voltage.
Similarly, when output voltage is higher, the output voltage that comparator U3A is compared passes through resistance R10, R8 and R9 partial pressure
Obtained magnitude of voltage is more than the reference voltage from the adjustable shunt regulator U2 in three ends, and comparator U3A exports low level, then this time
Coupling U1 is turned on.After optocoupler U1 conductings, resistance R13, optocoupler U1 and resistance R11 formation loops, and be grounded, then export to voltage stabilizing core
Tablet mode port TR low-voltages.When voltage stabilizing chip mode port TR voltage is low, the power supply fine setting of intelligent Precision voltage stabilizing chip
Pattern is closed, and firing current shaping modes reduce output voltage, recovers normal voltage.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and that described in above-described embodiment and specification is the present invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appended claims and its
Equivalent is defined.
Claims (5)
1. a kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip, including reference voltage circuit,
Comparison circuit and opto-coupled feedback circuit, it is characterised in that：Described comparison circuit includes comparator U3A, and the 8 of comparator U3A draws
Pin connects on the output voltage, and comparator U3A 4 pin ground wire GND2, comparator U3A 3 pins connect reference voltage circuit, defeated
Go out voltage and be sequentially connected in series ground wire GND2 after resistance R10, resistance R8 and resistance R9, comparator U3A 2 pins are attempted by resistance R8
Between resistance R9；
Opto-coupled feedback circuit includes optocoupler U1, and comparator U3A 1 pin is connected on optocoupler U1 3 pins, optocoupler U1 1 pin
By resistance R5 concatenations on the output voltage, optocoupler U1 5 pins and 6 pins and voltage stabilizing chip is accessed by resistance R11 after connecing
Mode port TR, optocoupler U1 4 pin ground wire GND1, supply voltage VCC are sequentially connected in series ground wire after resistance R1 and resistance R13
GND1, voltage stabilizing chip mode port TR is attempted by between resistance R1 and resistance R13.
2. a kind of triggering for Vehicular direct-current converter intelligent Precision voltage stabilizing chip according to claim 1 judges electricity
Road, it is characterised in that：Described reference voltage circuit includes the adjustable shunt regulator U2 in three ends, three ends are adjustable shunt regulator U2
Negative electrode be connected by resistance R12 with output voltage, three ends are adjustable shunt regulator U2 plus earth line GND2, three ends are adjustable
Shunt regulator U2 negative electrode and reference edge short circuit is followed by reference voltage Vref, and what reference voltage Vref was connected on comparator U3A 3 draws
On pin.
3. a kind of triggering for Vehicular direct-current converter intelligent Precision voltage stabilizing chip according to claim 1 judges electricity
Road, it is characterised in that：Also include loop compensation circuit, loop compensation circuit includes resistance R6 and electric capacity C22, and resistance R6 one end is simultaneously
Be connected on resistance R5, the resistance R6 other end is attempted by optocoupler U1 3 pins, electric capacity C22 be connected on resistance R6 and resistance R8 it
Between；Electric capacity C6 is connected with resistance R7, and the electric capacity C6 other end is attempted by electric capacity C22, and the resistance R7 other end is attempted by resistance
On R8.
4. a kind of triggering for Vehicular direct-current converter intelligent Precision voltage stabilizing chip according to claim 1 judges electricity
Road, it is characterised in that：Between described comparator U3A 8 pins and 4 pins and it is connected to electric capacity C21, described resistance R8 two ends
And it is connected to electric capacity C20.
5. a kind of triggering for Vehicular direct-current converter intelligent Precision voltage stabilizing chip according to claim 1 judges electricity
Road, it is characterised in that：Described resistance R10 resistance is 5.1K, and resistance R8 resistance is 33K, and resistance R9 resistance is 10K.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774748.1A CN105262334B (en) | 2015-11-13 | 2015-11-13 | A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510774748.1A CN105262334B (en) | 2015-11-13 | 2015-11-13 | A kind of triggering decision circuitry for Vehicular direct-current converter intelligent Precision voltage stabilizing chip |
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| Publication Number | Publication Date |
|---|---|
| CN105262334A CN105262334A (en) | 2016-01-20 |
| CN105262334B true CN105262334B (en) | 2017-08-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680757A (en) * | 2012-05-11 | 2012-09-19 | 蔡远文 | Multi-channel digital signal isolation, conditioning and acquisition device |
| CN203827180U (en) * | 2014-04-25 | 2014-09-10 | 安徽安凯汽车股份有限公司 | Voltage stabilization feedback circuit for automotive frequency converter power supply |
| CN204578835U (en) * | 2015-04-20 | 2015-08-19 | 黄河科技学院 | Efficiently, high-power LED illuminating lamp driver |
| CN204761069U (en) * | 2015-06-03 | 2015-11-11 | 上海工程技术大学 | Voltage control circuit is crossed in short -term to electric tricycle charger |
| CN205105096U (en) * | 2015-11-13 | 2016-03-23 | 安徽巨一自动化装备有限公司 | A trigger judgement circuit that is used for on -vehicle direct -current converter intelligence precision steady voltage chip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1811639A1 (en) * | 2006-01-23 | 2007-07-25 | Thomson Licensing S.A. | Overpower-protection circuit and power supply apparatus having the same |
-
2015
- 2015-11-13 CN CN201510774748.1A patent/CN105262334B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680757A (en) * | 2012-05-11 | 2012-09-19 | 蔡远文 | Multi-channel digital signal isolation, conditioning and acquisition device |
| CN203827180U (en) * | 2014-04-25 | 2014-09-10 | 安徽安凯汽车股份有限公司 | Voltage stabilization feedback circuit for automotive frequency converter power supply |
| CN204578835U (en) * | 2015-04-20 | 2015-08-19 | 黄河科技学院 | Efficiently, high-power LED illuminating lamp driver |
| CN204761069U (en) * | 2015-06-03 | 2015-11-11 | 上海工程技术大学 | Voltage control circuit is crossed in short -term to electric tricycle charger |
| CN205105096U (en) * | 2015-11-13 | 2016-03-23 | 安徽巨一自动化装备有限公司 | A trigger judgement circuit that is used for on -vehicle direct -current converter intelligence precision steady voltage chip |
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| Publication number | Publication date |
|---|---|
| CN105262334A (en) | 2016-01-20 |
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Effective date of registration: 20181224 Address after: 230051 Shanghai Road, Baohe Industrial Zone, Hefei, Anhui, East Dalian Road North Patentee after: Hefei Daoyi Power Technology Co., Ltd. Address before: 230051 Jianghuai Heavy Industry Base, Baohe Industrial Zone, Hefei City, Anhui Province Patentee before: Anhui Jee Automation Equipment Co., Ltd. |
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