CN206820654U - A kind of boost control circuit - Google Patents
A kind of boost control circuit Download PDFInfo
- Publication number
- CN206820654U CN206820654U CN201720580170.0U CN201720580170U CN206820654U CN 206820654 U CN206820654 U CN 206820654U CN 201720580170 U CN201720580170 U CN 201720580170U CN 206820654 U CN206820654 U CN 206820654U
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- boost
- resistance
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- oxide
- metal
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a kind of boost control circuit, including boost chip U1, control chip MCU, diode D1, metal-oxide-semiconductor Q1, feedback resistance R1, feedback resistance R2, detection resistance R3, USB female, the control chip MCU has A/D converter.Control chip MCU of the present utility model carries out voltage detecting so as to judge whether load accesses by ADC input pins AN0 to detection resistance R3 test side, and then control chip MCU controls boost chip U1 and metal-oxide-semiconductor Q1 work again；Therefore the utility model booster circuit when there is load to access could work；In no load access, control chip MCU control boost chips U1 is turned off and is made feedback resistance R1 and feedback resistance R2 not have electric current to flow through by turning off metal-oxide-semiconductor Q1, stand-by power consumption can effectively be reduced so that get a promotion using the usage time of portable power source of the present utility model.
Description
Technical field
A kind of circuit structure is the utility model is related to, particularly relates to a kind of boost control circuit.
Background technology
Portable power source, be also charger baby, traveling charger etc., be it is a kind of integrate power supply and charge function it is portable
Charger, it can whenever and wherever possible charge to digital equipments such as mobile phone, tablet personal computers, make undoubtedly alleviating digital product at this stage
The problem of power consumption deficiency, portable, the moveable feature of portable power source bring great convenience to us.Existing movement
Power supply typically uses lithium battery, and its output voltage only has 3.7V, and the charging voltage of existing digital product must be at least 5V, because
This lithium battery needs to access booster circuit；But many portable power sources do not have boosting rectifier control function, are accessed even without load, its
Booster circuit is also enabling always, therefore the problem of stand-by power consumption is high, usage time is short be present.
Utility model content
The purpose of this utility model is to provide a kind of boost control circuit, can whether Access Control is boosted electricity according to load
Whether is the work on road so that can effectively drop stand-by power consumption using portable power source of the present utility model, lift usage time.
In order to reach above-mentioned purpose, solution of the present utility model is：
A kind of boost control circuit, including boost chip U1, control chip MCU, inductance L1, diode D1, metal-oxide-semiconductor Q1,
Feedback resistance R1, feedback resistance R2, detection resistance R3, USB female, the control chip MCU have A/D converter；
The input VIN of the boost chip U1 is used to be connected with the output cathode BAT of lithium battery, the boost chip U1
Input VIN be connected with inductance L1 one end, the inductance L1 other end is connected with boost chip U1 output end OUT；It is described
Boost chip U1 Enable Pin EN and control chip MCU universaling I/O port PA1 are connected；The output end OUT of the boost chip U1
Diode D1 anode is connected, diode D1 negative electrode is connected with the VCC pin of USB females；The VCC pin of the USB females with it is anti-
Feed resistance R2 one end connection, the feedback resistance R2 other end are connected with boost chip U1 pressure feedback port FB, feedback resistance
The one end of the R2 other end also with feedback resistance R1 is connected, and the feedback resistance R1 other end is connected with metal-oxide-semiconductor Q1 drain electrode, MOS
Pipe Q1 grid is connected with control chip MCU universaling I/O port PA1, metal-oxide-semiconductor Q1 source ground；The detection resistance R3's
Test side is connected with the GND pin of USB females, the ADC input pin AN0 phases of detection resistance R3 test side also with control chip MCU
Even, detection resistance R3 other end ground connection.
The control chip MCU is HT45F4N.
The resistance of the detection resistance R3 is 0.05 ohm.
The metal-oxide-semiconductor Q1 is the enhanced metal-oxide-semiconductor of N-channel.
After said structure, control chip MCU of the present utility model is by ADC input pins AN0 to detection resistance R3's
Test side carries out voltage detecting so as to judge whether load accesses, and then control chip MCU controls boost chip U1 and metal-oxide-semiconductor again
Q1 work；Therefore the utility model booster circuit when there is load to access could work；In no load access, core is controlled
Piece MCU control boost chips U1 is turned off and is made feedback resistance R1 and feedback resistance R2 not have electric current to flow through by turning off metal-oxide-semiconductor Q1,
Stand-by power consumption can effectively be reduced so that reduced using the stand-by power consumption of portable power source of the present utility model, usage time is carried
Rise.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
In order to which the technical solution of the utility model is explained further, the utility model is entered below by specific embodiment
Row elaborates.
As shown in figure 1, the utility model discloses a kind of boost control circuit, it includes boost chip U1, control chip
MCU, inductance L1, diode D1, metal-oxide-semiconductor Q1, feedback resistance R1, feedback resistance R2, detection resistance R3, USB female；The control
Chip MCU has A/D converter and carries out voltage detecting will pass through detection resistance R3 so as to carry out load detecting, specifically, institute
It can be HT45F4N to state control chip MCU；The metal-oxide-semiconductor Q1 is the enhanced metal-oxide-semiconductor of N-channel.
The input VIN of the boost chip U1 is used to be connected with the output cathode BAT of lithium battery, the boost chip U1
Enable Pin EN be connected with control chip MCU universaling I/O port PA1；The input VIN's and inductance L1 of the boost chip U1
One end connects, and the inductance L1 other end is connected with boost chip U1 output end OUT；The output end OUT of the boost chip U1
Diode D1 anode is connected, diode D1 negative electrode is connected with the VCC pin of USB females；The VCC pin of the USB females with it is anti-
Feed resistance R2 one end connection, the feedback resistance R2 other end are connected with boost chip U1 pressure feedback port FB, feedback resistance
The one end of the R2 other end also with feedback resistance R1 is connected, and the feedback resistance R1 other end is connected with metal-oxide-semiconductor Q1 drain electrode, MOS
Pipe Q1 grid is connected with control chip MCU universaling I/O port PA1, metal-oxide-semiconductor Q1 source ground；The detection resistance R3's
Test side is connected with the GND pin of USB females, the ADC input pin AN0 phases of detection resistance R3 test side also with control chip MCU
Even, detection resistance R3 other end ground connection.
When USB females do not load access, detection resistance R3 test side does not have voltage, and control chip MCU passes through ADC
Input pin AN0 detects that the voltage of detection resistance R3 test side is less than a threshold value, and control chip MCU judges non-loaded access,
Then control chip MCU controls universaling I/O port PA1 to export a low level signal to boost chip U1 Enable Pin EN and MOS
Pipe Q1 grid, boost chip U1 and metal-oxide-semiconductor Q1 is turned off, now boost chip U1, which does not work, can reduce stand-by power consumption；And MOS
Pipe Q1 turns off the open circuit for causing feedback resistance R1, and lithium battery and inductance L1, diode D1, feedback resistance R1, feedback resistance R2 are not
Loop is formed, also no electric current is flowed through from feedback resistance R1 and feedback resistance R2, reduces standby current, can also be reduced standby
Power consumption.
When USB females have load to access, lithium battery forms one with diode D1 and load and detection resistance R3 and returned
Road, detection resistance R3 test side produce voltage, and control chip MCU detects detection resistance R3 inspection by ADC input pins AN0
The voltage for surveying end is more than a certain threshold value, and control chip MCU is determined with load access, and then control chip MCU controls control is general
I/O mouths PA1 exports a high level signal to boost chip U1 Enable Pin EN and metal-oxide-semiconductor Q1 grid, boost chip U1 works
Make, metal-oxide-semiconductor Q1 conductings, booster circuit is started working, and load charges normal.Produced to reduce detection resistance R3 when loading and accessing
Power consumption, the detection resistance R3 is small resistor, and detection resistance R3 resistance is preferably 0.05 ohm；Filled in general load
The electric current of electricity is 1A to 2A, therefore the power consumption of detection resistance is 0.05W to 0.2W, and larger work(will not be produced to portable power source
Rate, will not large effect portable power source usage time.
Control chip MCU of the present utility model carries out voltage inspection by ADC input pins AN0 to detection resistance R3 test side
Survey so as to judge whether load accesses, then control chip MCU controls boost chip U1 and metal-oxide-semiconductor Q1 work again；Therefore originally
Utility model booster circuit when there is load to access could work；In no load access, control chip MCU control boosting cores
Piece U1 is turned off and is made feedback resistance R1 and feedback resistance R2 not have electric current to flow through by turning off metal-oxide-semiconductor Q1, can effectively be reduced standby
Power consumption so that got a promotion using the usage time of portable power source of the present utility model.
Above-described embodiment and schema and non-limiting product form of the present utility model and style, any art
The appropriate change or modification that those of ordinary skill is done to it, all should be regarded as not departing from patent category of the present utility model.
Claims (4)
- A kind of 1. boost control circuit, it is characterised in that：Including boost chip U1, control chip MCU, inductance L1, diode D1, Metal-oxide-semiconductor Q1, feedback resistance R1, feedback resistance R2, detection resistance R3, USB female, the control chip MCU have A/D conversions Device；The input VIN of the boost chip U1 is used to be connected with the output cathode BAT of lithium battery, and the boost chip U1's is defeated Enter to hold VIN and inductance L1 one end to be connected, the inductance L1 other end is connected with boost chip U1 output end OUT；The boosting Chip U1 Enable Pin EN and control chip MCU universaling I/O port PA1 are connected；The output end OUT connections of the boost chip U1 Diode D1 anode, diode D1 negative electrode are connected with the VCC pin of USB females；The VCC pin of the USB females and feedback electricity R2 one end connection is hindered, the feedback resistance R2 other end is connected with boost chip U1 pressure feedback port FB, feedback resistance R2's The one end of the other end also with feedback resistance R1 is connected, and the feedback resistance R1 other end is connected with metal-oxide-semiconductor Q1 drain electrode, metal-oxide-semiconductor Q1 Grid be connected with control chip MCU universaling I/O port PA1, metal-oxide-semiconductor Q1 source ground；The detection of the detection resistance R3 End is connected with the GND pin of USB females, and detection resistance R3 test side is also connected with control chip MCU ADC input pins AN0, inspection Measuring resistance R3 other end ground connection.
- A kind of 2. boost control circuit as claimed in claim 1, it is characterised in that：The control chip MCU is HT45F4N.
- A kind of 3. boost control circuit as claimed in claim 1, it is characterised in that：The resistance of the detection resistance R3 is 0.05 Ohm.
- A kind of 4. boost control circuit as claimed in claim 1, it is characterised in that：The metal-oxide-semiconductor Q1 is that N-channel is enhanced Metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720580170.0U CN206820654U (en) | 2017-05-23 | 2017-05-23 | A kind of boost control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720580170.0U CN206820654U (en) | 2017-05-23 | 2017-05-23 | A kind of boost control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206820654U true CN206820654U (en) | 2017-12-29 |
Family
ID=60756447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720580170.0U Active CN206820654U (en) | 2017-05-23 | 2017-05-23 | A kind of boost control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206820654U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187047A (en) * | 2020-09-03 | 2021-01-05 | 科大讯飞股份有限公司 | BOOST power supply, power supply circuit and electronic product |
| CN113937856A (en) * | 2021-10-16 | 2022-01-14 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
-
2017
- 2017-05-23 CN CN201720580170.0U patent/CN206820654U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187047A (en) * | 2020-09-03 | 2021-01-05 | 科大讯飞股份有限公司 | BOOST power supply, power supply circuit and electronic product |
| CN113937856A (en) * | 2021-10-16 | 2022-01-14 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
| CN113937856B (en) * | 2021-10-16 | 2023-03-24 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
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