CN106067690A - A kind of vehicle-mounted USB charger - Google Patents
A kind of vehicle-mounted USB charger Download PDFInfo
- Publication number
- CN106067690A CN106067690A CN201610532254.7A CN201610532254A CN106067690A CN 106067690 A CN106067690 A CN 106067690A CN 201610532254 A CN201610532254 A CN 201610532254A CN 106067690 A CN106067690 A CN 106067690A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- supply processing
- vehicle
- processing circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of vehicle-mounted USB charger, including housing parts, back cover part and the circuit board component being arranged in housing parts, described circuit board component is provided with input, output circuit, power supply processing circuit and Intelligent Recognition mode circuit, it is characterized in that: described power supply processing circuit front end is provided with input protection circuit, the outfan of described power supply processing circuit and output circuit, Intelligent Recognition mode circuit is in parallel, described power supply processing circuit includes control chip, overvoltage crowbar, current protecting circuit, short-circuit protection circuit and switch protecting circuit, described switch protecting circuit is for removing the high-frequency harmonic produced by described power supply processing circuit.The present invention is realizing on the basis of overvoltage protection, overcurrent protection, overtemperature protection and short-circuit protection protect charger by power supply processing circuit, filters out high-frequency harmonic produced by on-off circuit simultaneously, meets the vehicle electronics product rigors to EMC.
Description
Technical field
The present invention relates to a kind of USB charger, particularly relate to a kind of vehicle-mounted USB charger, be used on automobile intelligence
Charging of mobile devices.
Background technology
At present, to have become modern requisite daily for the portable electric appts such as mobile phone, IPAD, digital camera
Product, are especially travelling outdoors, are going on business during the journey, and these electronic equipments are generally individually equipped with rechargeable battery, special fill
Electrical equipment and data wire, for the transmission of data, equipment charge etc..But owing to special charger needs to use alternating current power supply, so
It is that electronic equipment is charged being only selection by vehicle-mounted USB charger.
The most common vehicle-mounted USB charger is used mostly from cigar lighter socket power taking, by vehicle-mounted USB charger with
The connection of cigar lighter, inserts the USB delivery outlet of vehicle-mounted USB charger, the other end and corresponding Intelligent sliding by data wire one end
Dynamic equipment connects, thus realizes charging it.
But, (EMC, i.e. Electromagnetic Compatibility, refers to equipment to the Electro Magnetic Compatibility on automobile
Or system meets the requirements to run in its electromagnetic environment and does not disturb any equipment intolerable electromagnetism of generation in its environment
The ability disturbed.) require higher, if USB charger EMC characteristic is undesirable, easily cause USB charger work different
Often, other electronic units on automobile also can be caused time serious to be interfered, and affect the charging effect to Intelligent mobile equipment,
The unnecessary trouble of this situation cause the user, inconvenience very occur.
Summary of the invention
It is an object of the present invention to provide a kind of vehicle-mounted USB charger, by the improvement of circuit, improve stability, accord with completely
Close automobile EMC performance requirement, it is to avoid to other electronic unit interference effects on automobile.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of vehicle-mounted USB charger, including housing parts,
Back cover part and the circuit board component being arranged in housing parts, described circuit board component is provided with input, output circuit, electricity
Source processes circuit and Intelligent Recognition mode circuit, and described power supply processing circuit front end is provided with input protection circuit, at described power supply
Outfan and the output circuit of reason circuit, Intelligent Recognition mode circuit are in parallel, and described power supply processing circuit includes control chip, mistake
Voltage protection circuit, current protecting circuit, short-circuit protection circuit and switch protecting circuit, described switch protecting circuit is used for removing
The high-frequency harmonic produced by described power supply processing circuit.
In technique scheme, described control chip is on and off switch chip, and described switch protecting circuit is by a Schottky
Switching tube and magnetic bead series connection ground connection are constituted, and this switch protecting circuit is connected to the control signal input of described on and off switch chip
On end.
Further technical scheme is that a RC absorbing circuit the most in parallel in described switch protecting circuit, by a resistance and one
Capacitances in series ground connection is constituted.
In technique scheme, described input protection circuit is by stabilivolt, common mode inductance and π type filter circuit parallel connection structure
Becoming, input circuit is in this input protection circuit accesses described power supply processing circuit.
In technique scheme, also include an output indicating circuit, form including a light emitting diode and a resistant series,
The input of described output indicating circuit is in parallel with the power end of described output circuit.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that
1. the present invention adds switch protecting circuit in power supply processing circuit part, utilizes Schottky switching tube series connection magnetic bead
Over the ground, high-frequency harmonic produced by on-off circuit is effectively filtered out so that it is externally interference at least reduces more than 10dB, on the one hand
Do not affected by electromagnetic interference on automobile, on the other hand also other ECU on automobile will not be caused electromagnetic interference, improve vehicle-mounted
The EMC performance of USB charger；
2. a RC absorbing circuit in parallel in switch protecting circuit, can sponge produced by power supply processing circuit high further
Frequently harmonic signal, meets the vehicle electronics product rigors to EMC.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the circuit block diagram of the embodiment of the present invention one；
Fig. 3 is the circuit diagram of the embodiment of the present invention one.
Wherein: 1, housing parts；2, back cover part；3, circuit board component.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
The detailed description of the present invention mainly by program, step, logical block, process or other symbolistic descriptions come in
Existing, the running of the technical scheme in its direct or indirect simulation present invention.Technical staff in art uses herein
These descriptions and statement others skilled in the art in art effectively introduce their work essence.
Embodiment one: see shown in Fig. 1～3, a kind of vehicle-mounted USB charger, including housing parts 1, back cover part 2 and
The circuit board component 3 being arranged in housing parts 1, described circuit board component 3 is provided with input, output circuit, power supply process electricity
Road and Intelligent Recognition mode circuit, described power supply processing circuit front end is provided with input protection circuit, described power supply processing circuit
Outfan and output circuit, Intelligent Recognition mode circuit are in parallel, and described power supply processing circuit includes control chip, overvoltage protection electricity
Road, current protecting circuit, short-circuit protection circuit and switch protecting circuit, described switch protecting circuit is for removing by described electricity
Source processes the high-frequency harmonic that circuit produces.
As Fig. 2, DC12V power supply inputs from input port, through input protection circuit realize back-end circuit not by voltage transient and
While ectocine, also realization itself is disturbed the most to external world, then reaches USB output by power supply processing circuit after being processed
Instruction, Intelligent Recognition and USB output port/DC5V/2.1A.
In Fig. 3, input protection circuit part is by the stabilivolt TVS pipe of input, common mode inductance TR2 and π type filter circuit
Composition, while protection back-end circuit is not by voltage transients on car, (conduction is dry to curb the external interference of product itself
Disturb and radiation interference) and other the ECU vehicle-mounted impact (BCI and RI) on product itself.
Power supply processing circuit part is made up of control chip (on and off switch chip) U1 and periphery electronic devices and components, is realizing
On the basis of overvoltage protection, overcurrent protection, overtemperature protection and short-circuit protection protect charger, it is additionally provided with a switch protection
Circuit, described switch protecting circuit is made up of a Schottky switching tube and magnetic bead series connection ground connection, and this switch protecting circuit also connects
On the control signal input of described on and off switch chip, effectively filter out high-frequency harmonic produced by on-off circuit, make
It externally disturbs and at least reduces more than 10dB, meets the vehicle electronics product rigors to EMC, and power supply processing circuit part is another
One characteristic is Schottky switching tube (D1) loop parallel connection RC absorbing circuit, a resistance R5 and an electric capacity C 12 connect ground connection structure
Become, further high-frequency harmonic produced by on-off circuit is sponged.
Intelligent Recognition mode circuit is made up of U4 and periphery electronic component etc., it is achieved with various types of smart machines from
Dynamic identifying and communicate, be enough to mate original-pack charger completely fills effect soon.
Output indicating circuit, is made up of a LED 1 and resistance R23, and after energising, USB charger has luminescence
Instruction, the input of described output indicating circuit is in parallel with the power end of described output circuit.
The electric current of USB output port output DC5V/2.1A, the smart machine of compatible the most all main brands, with it
The big charging allowing charging current quick to it, safe.
Above the present invention has been carried out the most detailed description with certain particularity.Ordinary skill in art
Personnel are it should be understood that what description in embodiment was merely exemplary, before without departing from true spirit and scope of the present invention
Put that making is changed all should belong to protection scope of the present invention.Scope of the present invention is by described power
That profit claim is defined rather than limited by the foregoing description in embodiment.
Claims (5)
1. a vehicle-mounted USB charger, including housing parts, back cover part and the circuit board portion being arranged in housing parts
Part, described circuit board component is provided with input, output circuit, power supply processing circuit and Intelligent Recognition mode circuit, and its feature exists
In: described power supply processing circuit front end is provided with input protection circuit, the outfan of described power supply processing circuit and output circuit, intelligence
Can recognition mode circuit in parallel, described power supply processing circuit includes control chip, overvoltage crowbar, current protecting circuit, short
Road protection circuit and switch protecting circuit, described switch protecting circuit is for removing the height produced by described power supply processing circuit
Frequently harmonic wave.
Vehicle-mounted USB charger the most according to claim 1, it is characterised in that: described control chip is on and off switch chip,
Described switch protecting circuit is made up of a Schottky switching tube and magnetic bead series connection ground connection, and this switch protecting circuit is connected to described
On the control signal input of on and off switch chip.
Vehicle-mounted USB charger the most according to claim 2, it is characterised in that: also parallel connection one in described switch protecting circuit
RC absorbing circuit, is made up of a resistance and a capacitances in series ground connection.
Vehicle-mounted USB charger the most according to claim 1, it is characterised in that: described input protection circuit by stabilivolt, altogether
Mould inductance and π type filter circuit parallel connection are constituted, and input circuit is in this input protection circuit accesses described power supply processing circuit.
Vehicle-mounted USB charger the most according to claim 1, it is characterised in that: also include an output indicating circuit, including one
Light emitting diode and resistant series composition, the input of described output indicating circuit is with the power end of described output circuit also
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532254.7A CN106067690A (en) | 2016-07-08 | 2016-07-08 | A kind of vehicle-mounted USB charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532254.7A CN106067690A (en) | 2016-07-08 | 2016-07-08 | A kind of vehicle-mounted USB charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106067690A true CN106067690A (en) | 2016-11-02 |
Family
ID=57206542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610532254.7A Pending CN106067690A (en) | 2016-07-08 | 2016-07-08 | A kind of vehicle-mounted USB charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106067690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911168A (en) * | 2017-04-27 | 2017-06-30 | 深圳市赛梅斯凯科技有限公司 | A kind of implementation method charged for intelligent terminal rapid large-current |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219239Y (en) * | 2008-06-18 | 2009-04-08 | 合肥同智科技发展有限公司 | Low power-input high-power-output start power supply |
| US20090141414A1 (en) * | 2007-11-30 | 2009-06-04 | Chin Wei Hsu | Protection circuit for electric power of a car |
| CN202713142U (en) * | 2012-03-07 | 2013-01-30 | 北京经纬恒润科技有限公司 | Power supply filtering protection circuit |
| CN205070531U (en) * | 2015-10-28 | 2016-03-02 | 广东百事泰电子商务股份有限公司 | Double -H groove weld SB fills socket soon |
| CN205231797U (en) * | 2015-12-18 | 2016-05-11 | 德尔福中央电气（上海）有限公司 | On -vehicle USB two port battery charging outfit |
-
2016
- 2016-07-08 CN CN201610532254.7A patent/CN106067690A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090141414A1 (en) * | 2007-11-30 | 2009-06-04 | Chin Wei Hsu | Protection circuit for electric power of a car |
| CN201219239Y (en) * | 2008-06-18 | 2009-04-08 | 合肥同智科技发展有限公司 | Low power-input high-power-output start power supply |
| CN202713142U (en) * | 2012-03-07 | 2013-01-30 | 北京经纬恒润科技有限公司 | Power supply filtering protection circuit |
| CN205070531U (en) * | 2015-10-28 | 2016-03-02 | 广东百事泰电子商务股份有限公司 | Double -H groove weld SB fills socket soon |
| CN205231797U (en) * | 2015-12-18 | 2016-05-11 | 德尔福中央电气（上海）有限公司 | On -vehicle USB two port battery charging outfit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911168A (en) * | 2017-04-27 | 2017-06-30 | 深圳市赛梅斯凯科技有限公司 | A kind of implementation method charged for intelligent terminal rapid large-current |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161102 |
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| RJ01 | Rejection of invention patent application after publication |