CN207320866U - A kind of adaptive charging circuits of USB - Google Patents
A kind of adaptive charging circuits of USB Download PDFInfo
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- CN207320866U CN207320866U CN201721050068.6U CN201721050068U CN207320866U CN 207320866 U CN207320866 U CN 207320866U CN 201721050068 U CN201721050068 U CN 201721050068U CN 207320866 U CN207320866 U CN 207320866U
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Abstract
The utility model proposes a kind of adaptive charging circuits of USB, adaptive transformation is carried out according to battery capacity, solve the compatibility issue of charging circuit, utilize the upgrading of electronic product battery capacity, it has the input terminal being connected with USB connector, and the output terminal of connection battery, it has adaptive boosting part and compares feedback fraction；The adaptive boosting section point includes a boost chip, inductance L1, diode D1, current-limiting resistance R18, R19, and divider resistance R13, R14；The relatively feedback fraction includes comparator one and comparator two, and draw and connect the input terminal of the charging circuit and carry out taking electricity, resistance R21, diode D4, D5 are serially connected between the input terminal and ground terminal, the anode of the diode D5 is connected with the cathode of diode D4, its cathode is connected with ground terminal；The utility model is depressed into the ceiling voltage of N batteries by becoming to the 5V voltage adaptives of USB interface, prevents damage of the overvoltage charging to battery.
Description
Technical field
It the utility model is related to a kind of adaptive charging circuits of USB.
Background technology
Existing portable equipment（Such as mobile phone, Baffle Box of Bluetooth）Mostly equipped with USB connector and the charging being attached thereto electricity
Road.These charging circuits are the transforming circuit structures that inside is designed according to battery capacity, elected to be become with battery total capacity
It can not often be realized during change adaptively, cause overvoltage to charge and make battery damage, this not only makes the compatible relatively low of charging circuit, factory
Family is high to the dependence of battery specifications, and when producer sets whole battery capacity on demand, it is necessary to circuit structure is changed, causes circuit
The growth of design cost and production cost.
Utility model content
To overcome problems of the prior art, the utility model proposes a kind of adaptive charging circuits of USB, according to electricity
Tankage carries out adaptive transformation, solves the compatibility issue of charging circuit, using the upgrading of electronic product battery capacity, specifically
It is by being realized with existing technological means：
A kind of adaptive charging circuits of USB, have the input terminal being connected with USB connector, and the output of connection battery
End, it has adaptive boosting part and compares feedback fraction；
The adaptive boosting section point includes a boost chip, inductance L1, diode D1, current-limiting resistance R18, R19, and divides
Piezoresistance R13, R14；The boost chip has power end VCC, feedback end FB and exchange end LX, the inductance L1 and diode
D1 is sequentially connected in series between the input terminal and output terminal of charging circuit, and capacitance C9 is terminated with before the inductance L1, and its rear end connects
The anode of diode D1 is connect, the exchange end LX is connected to the anode of diode D1；The power end VCC is connected to the input
End takes electricity, and divider resistance R13, R14 is connected between the output terminal and ground terminal, and the feedback end FB is connected to divider resistance
The point of contact of R13 and R14, the current-limiting resistance R18 and R19 are connected in output terminal；
The relatively feedback fraction includes comparator one and comparator two, and draws the input terminal progress for connecing the charging circuit
Electricity is taken, resistance R21, diode D4, D5, the anode and diode of the diode D5 are serially connected between the input terminal and ground terminal
The cathode connection of D4, its cathode is connected with ground terminal, and the anode of diode D4 is connected to the positive ends IN2+ of comparator one, described
Divider resistance R22, R23 are in series between input terminal and ground terminal, the tie point of the divider resistance R22 and R23, which is connected to, to be compared
The negative polarity end IN2- of device one；The positive ends IN4+ of the comparator two is connected to the output terminal of the charging circuit, it is negative
Polar end IN4- is grounded through biasing resistor R3；The cathode of the diode D4 is grounded via capacitance C10, and the comparator two is born
Polar end IN4- is connected via resistance R15 with capacitance C10；The output terminal OUT2 of the comparator one and the output terminal of comparator two
OUT4 collects the feedback end FB for being connected to the boost chip, and the output terminal OUT2 of comparator one and its positive ends IN2+ it
Between be serially connected with resistance R24 and capacitance C13.
In one or more embodiments of the utility model, the boost chip has Enable Pin EN, the Enable Pin
EN is connected to the input terminal.
In one or more embodiments of the utility model, the charging circuit input of the adaptive boosting part connection
Electrolytic capacitor C1 and capacitance C2 is equipped between end and ground terminal, capacitance C4 and electrolytic capacitor are connected between the output terminal and ground terminal
CE1。
In one or more embodiments of the utility model, capacitance is connected between the diode D1 and feedback end FB
C16, resistance R12 is connected between the feedback end FB and ground terminal.
In one or more embodiments of the utility model, the positive ends IN2+ of the comparator one is via capacitance
C11 is grounded.
In one or more embodiments of the utility model, the relatively feedback fraction includes comparator three, the ratio
Positive ends IN3+ compared with device three is connected to the output terminal of charging circuit, its negative polarity end IN3- is via resistance R26 and capacitance C10
Connection, its output terminal OUT3 are connected to charging indicator light.
In one or more embodiments of the utility model, the comparator one, comparator two and comparator three are integrated
In a comparator chip, which there is power end VCC, its power end VCC to be connected to the input terminal of charging circuit
Electricity is taken, and electrolytic capacitor C17 and capacitance C7 is equipped between ground terminal.
The beneficial effects of the utility model are：1）N batteries are depressed into by becoming to the 5V voltage adaptives of USB interface most
High voltage, prevents damage of the overvoltage charging to battery.2）Output electric current measure is realized by comparing feedback module, current constant control,
Prevent battery from being damaged because crossing current charge, effectively lift the battery compatibility of electronic product and ensure battery.3）
By being detected to the voltage of input terminal, prevent overvoltage or drag the situation of dead USB input voltages to occur.
Brief description of the drawings
Fig. 1 is the schematic diagram of the adaptive charging circuits of USB of the utility model.
Fig. 2 is the partial enlarged view one of Fig. 1.
Fig. 3 is the partial enlarged view two of Fig. 1.
Embodiment
Below in conjunction with attached drawing 1 to 3, application scheme is further described：
A kind of adaptive charging circuits of USB, have the input terminal being connected with USB connector, and the output of connection battery
End, it has adaptive boosting part and compares feedback fraction；
The adaptive boosting section point includes a boost chip（SILERGY SY7219 boost chips can be used）, inductance
L1, diode D1, current-limiting resistance R18, R19, and divider resistance R13, R14；The boost chip has power end VCC, feedback
End FB, Enable Pin EN and exchange end LX, the inductance L1 and diode D1 are sequentially connected in series input terminal and output in charging circuit
Between end, capacitance C9, the anode of its rear end connection diode D1 are terminated with before the inductance L1, the exchange end LX is connected to
The anode of diode D1；The power end VCC is connected to the input terminal and takes electricity, is connected between the output terminal and ground terminal point
Piezoresistance R13, R14, the feedback end FB are connected to the point of contact of divider resistance R13 and R14, the current-limiting resistance R18 and R19
Output terminal is connected in, the Enable Pin EN is connected to the input terminal；
The relatively feedback fraction includes comparator one and comparator two, and draws the input terminal progress for connecing the charging circuit
Electricity is taken, resistance R21, diode D4, D5, the anode and diode of the diode D5 are serially connected between the input terminal and ground terminal
The cathode connection of D4, its cathode is connected with ground terminal, and the anode of diode D4 is connected to the positive ends IN2+ of comparator one, described
Divider resistance R22, R23 are in series between input terminal and ground terminal, the tie point of the divider resistance R22 and R23, which is connected to, to be compared
The negative polarity end IN2- of device one；The positive ends IN4+ of the comparator two is connected to the output terminal of the charging circuit, it is negative
Polar end IN4- is grounded through biasing resistor R3；The cathode of the diode D4 is grounded via capacitance C10, and the comparator two is born
Polar end IN4- is connected via resistance R15 with capacitance C10；The output terminal OUT2 of the comparator one and the output terminal of comparator two
OUT4 collects the feedback end FB for being connected to the boost chip, and the output terminal OUT2 of comparator one and its positive ends IN2+ it
Between be serially connected with resistance R24 and capacitance C13, the positive ends IN2+ of the comparator one is grounded via capacitance C11.
Specifically, it is equipped with electrolytic capacitor C1 between the charging circuit input terminal and ground terminal of the adaptive boosting part connection
With capacitance C2, capacitance C4 and electrolytic capacitor CE1 are connected between the output terminal and ground terminal, plays the role of input, output filtering,
Protect internal circuit device and chip.Capacitance C16, the feedback end FB and ground are connected between the diode D1 and feedback end FB
Resistance R12 is connected between end.The relatively feedback fraction includes comparator three, the positive ends IN3+ connections of the comparator three
To the output terminal of charging circuit, its negative polarity end IN3- is connected via resistance R26 with capacitance C10, its output terminal OUT3 is connected to
Charging indicator light.The comparator one, comparator two and comparator three are integrated in a comparator chip, comparator chip tool
There is power end VCC, the input terminal that its power end VCC is connected to charging circuit takes electricity, and electrolytic capacitor C17 is equipped between ground terminal
With capacitance C7.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder
Same, approximation or the technology deduction made based on this, replacement, improvement etc., are regarded as the protection domain of this patent.
Claims (7)
1. a kind of adaptive charging circuits of USB, have the input terminal being connected with USB connector, and the output terminal of connection battery,
It is characterized in that：With adaptive boosting part and compare feedback fraction；
The adaptive boosting section point includes a boost chip, inductance L1, diode D1, current-limiting resistance R18, R19, and partial pressure electricity
Hinder R13, R14；The boost chip have power end VCC, feedback end FB and exchange end LX, the inductance L1 and diode D1 according to
It is secondary to be serially connected between the input terminal of charging circuit and output terminal, capacitance C9, its rear end connection two are terminated with before the inductance L1
The anode of pole pipe D1, the exchange end LX are connected to the anode of diode D1；The power end VCC is connected to the input terminal and takes
Electricity, is connected with divider resistance R13, R14 between the output terminal and ground terminal, the feedback end FB be connected to divider resistance R13 and
The point of contact of R14, the current-limiting resistance R18 and R19 are connected in output terminal；
The relatively feedback fraction includes comparator one and comparator two, and draws and connect the input terminal of the charging circuit and taken
Electricity, is serially connected with resistance R21, diode D4, D5, the anode and diode D4 of the diode D5 between the input terminal and ground terminal
Cathode connection, its cathode is connected with ground terminal, and the anode of diode D4 is connected to the positive ends IN2+ of comparator one, described defeated
Enter to be in series with divider resistance R22, R23 between end and ground terminal, the tie point of the divider resistance R22 and R23 is connected to comparator
One negative polarity end IN2-；The positive ends IN4+ of the comparator two is connected to the output terminal of the charging circuit, its anode
Property end IN4- through biasing resistor R3 be grounded；The cathode of the diode D4 is grounded via capacitance C10, the anode of the comparator two
Property end IN4- is connected via resistance R15 with capacitance C10；The output terminal OUT2 of the comparator one and the output terminal of comparator two
OUT4 collects the feedback end FB for being connected to the boost chip, and the output terminal OUT2 of comparator one and its positive ends IN2+ it
Between be serially connected with resistance R24 and capacitance C13.
2. the adaptive charging circuits of USB according to claim 1, it is characterised in that：The boost chip has Enable Pin
EN, the Enable Pin EN are connected to the input terminal.
3. the adaptive charging circuits of USB according to claim 1, it is characterised in that：The adaptive boosting part connects
Charging circuit input terminal and ground terminal between be equipped with electrolytic capacitor C1 and capacitance C2, be connected to capacitance between the output terminal and ground terminal
C4 and electrolytic capacitor CE1.
4. the adaptive charging circuits of USB according to claim 1, it is characterised in that：The diode D1 and feedback end FB
Between be connected to capacitance C16, be connected to resistance R12 between the feedback end FB and ground terminal.
5. the adaptive charging circuits of USB according to claim 1, it is characterised in that：The positive ends of the comparator one
IN2+ is grounded via capacitance C11.
6. according to the adaptive charging circuits of claim 1-5 any one of them USB, it is characterised in that：The relatively feedback section
Dividing includes comparator three, and the positive ends IN3+ of the comparator three is connected to the output terminal of charging circuit, its negative polarity end
IN3- is connected via resistance R26 with capacitance C10, its output terminal OUT3 is connected to charging indicator light.
7. the adaptive charging circuits of USB according to claim 6, it is characterised in that：The comparator one, two and of comparator
Comparator three is integrated in a comparator chip, which there is power end VCC, its power end VCC to be connected to charging
The input terminal of circuit takes electricity, and electrolytic capacitor C17 and capacitance C7 is equipped between ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721050068.6U CN207320866U (en) | 2017-08-21 | 2017-08-21 | A kind of adaptive charging circuits of USB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721050068.6U CN207320866U (en) | 2017-08-21 | 2017-08-21 | A kind of adaptive charging circuits of USB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207320866U true CN207320866U (en) | 2018-05-04 |
Family
ID=62432866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721050068.6U Active CN207320866U (en) | 2017-08-21 | 2017-08-21 | A kind of adaptive charging circuits of USB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207320866U (en) |
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2017
- 2017-08-21 CN CN201721050068.6U patent/CN207320866U/en active Active
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