CN104283286A - USB digital device mobile power supply - Google Patents
USB digital device mobile power supply Download PDFInfo
- Publication number
- CN104283286A CN104283286A CN201410587162.XA CN201410587162A CN104283286A CN 104283286 A CN104283286 A CN 104283286A CN 201410587162 A CN201410587162 A CN 201410587162A CN 104283286 A CN104283286 A CN 104283286A
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- Prior art keywords
- circuit
- resistance
- voltage stabilizing
- usb
- stabilizing circuit
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Classifications
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- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a USB digital device mobile power supply. The USB digital device mobile power supply is characterized by comprising a 3-6 V DC power supply, a DC/DC voltage boosting and stabilizing circuit, an output voltage regulating circuit and a USB interface circuit; the DC/DC voltage boosting and stabilizing circuit is composed of a DC/DC voltage boosting and stabilizing circuit IC1, an over-current protecting resistor R1, a timing capacitor C2, an energy storage inductor L1, a fly-wheel diode D1 and an electrolytic capacitor C3, and the type MC34063 is selected for the DC/DC voltage boosting and stabilizing circuit IC1; an A-type USB female interface is selected as a USB interface, the output end positive electrode V+ of the USB interface is connected with the positive electrode of the electrolytic capacitor C3, the output end negative electrode V- of the USB interface is connected with a circuit ground GND, the negative electrode of the 3-6 V DC power supply is connected with the circuit ground GND, the negative electrode D- of a data line of the USB interface is connected with the positive electrode VCC of the 3-6 V DC power supply through a resistor R6, and the positive electrode D+ of the data line of the USB interface is connected with the circuit ground GND through a resistor R5.
Description
Technical field
The invention belongs to lithium battery emergent charging technical field, is about a kind of USB digital equipment portable power source.
Background technology
Current USB digital equipment uses widely, but the problem that the USB digital equipment power consumptions such as mobile phone are large annoyings everybody always, as: smart mobile phone capacity thousands of MAH easily of lithium battery of being joined, this brings very large worry to digital equipment users such as mobile phones.In order to solve lithium cell charging or Emergency use problem, the present invention has designed and produced a kind of USB digital equipment portable power source, it uses 2 ~ 4 joint nickel-hydrogen chargeable cells as power supply, export the charger that 5V direct voltage can be used as USB digital equipment, also can be MP3 player, camera, mobile phone, USB port digital equipment charging or as emergency power supply.
The present invention adopts the dc/dc boost voltage stabilizing circuit MC34063 of technology maturation as core parts, and this circuit has the advantages such as use components and parts are few, circuit debugging is simple, practical, good reliability, cost of manufacture are low.
Below describe the core technology content that USB digital equipment portable power source of the present invention is involved in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: in order to solve lithium cell charging or Emergency use problem, the present invention has designed and produced a kind of USB digital equipment portable power source, it uses 2 ~ 4 joint nickel-hydrogen chargeable cells as power supply, export the charger that 5V direct voltage can be used as USB digital equipment, also can be MP3 player, camera, mobile phone, USB port digital equipment charging or as emergency power supply.The present invention adopts the dc/dc boost voltage stabilizing circuit MC34063 of technology maturation as core parts, and this circuit has the advantages such as use components and parts are few, circuit debugging is simple, practical, good reliability, cost of manufacture are low.
Circuit working principle: when the switching tube conducting of dc/dc boost voltage stabilizing circuit IC1 (MC34063) chip internal, 3 ~ 6V DC power supply is through the 2nd pin of current sampling resistor R1, energy storage inductor L1, MC34063 and the 4th pin connection circuit ground GND, now energy storage inductor L1 starts stored energy, provides 5V stable DC voltage by electrochemical capacitor C3 to load.When MC34063 chip internal switching tube disconnects, 3 ~ 6V DC power supply and energy storage inductor L1 provide 5V stable DC voltage to load and electrochemical capacitor C3 simultaneously.Energy storage inductor L1 is releasing energy period, and because the electromotive force polarity at its two ends is identical with DC power polarity, be equivalent to two DC power supply series connection, the voltage thus load obtained is higher than the voltage of DC power supply DC.The frequency of the conducting of internal switch pipe and shutoff is determined by the operating frequency of chip, the external timing capacitor of internal oscillator, for changing the setting of frequency of oscillation, as long as the time constant long enough of this frequency relative load, load can obtain galvanic current pressure.Resistance R3 and resistance R4 is used for arranging output voltage, and resistance R1 is overcurrent protection sample resistance.Resistance R5 and resistance R6 is for mating USB interface data wire.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides a USB digital equipment portable power source; Use the female mouth of general A type USB, female mouth the 1st pin of USB to be female mouth the 2nd pin of 5V+, USB be data wire-, female mouth the 3rd pin of USB be data wire+, female mouth the 4th pin of USB is circuit ground GND.
Embodiment
According to circuit working schematic diagram and the accompanying drawing explanation of the portable power source of USB digital equipment shown in accompanying drawing 1, and according to the annexation in each several part circuit described in summary of the invention between components and parts, and the components and parts technical parameter described in execution mode requires that carrying out enforcement can realize the present invention.
Technical scheme: USB digital equipment portable power source, it comprises 3 ~ 6V DC power supply, dc/dc boost voltage stabilizing circuit, output voltage regulation circuit, usb circuit, it is characterized in that:
Dc/dc boost voltage stabilizing circuit: it is by dc/dc boost voltage stabilizing circuit IC1, overcurrent protection resistance R1, timing capacitor C2, energy storage inductor L1, sustained diode 1 and electrochemical capacitor C3 form, the model that dc/dc boost voltage stabilizing circuit IC1 selects is MC34063, 3 ~ 6V DC power anode VCC connects dc/dc boost voltage stabilizing circuit IC1 the 6th pin and overcurrent protection resistance R1 one end and electrochemical capacitor C1 positive pole, electrochemical capacitor C1 negative pole connection circuit ground GND, dc/dc boost voltage stabilizing circuit IC1 the 7th pin takes over the stream protective resistance R1 other end and resistance R2 one end and energy storage inductor L1 one end, dc/dc boost integrated regulator IC1 the 8th pin connecting resistance R2 other end, dc/dc boost voltage stabilizing circuit IC1 the 1st pin connects the energy storage inductor L1 other end and sustained diode 1 positive pole, dc/dc boost voltage stabilizing circuit IC1 the 3rd pin connects one end of timing capacitor C2, dc/dc boost voltage stabilizing circuit IC1 the 2nd pin and the 4th pin meet the timing capacitor C2 other end and circuit ground GND, sustained diode 1 negative pole connects electrochemical capacitor C3 positive pole, electrochemical capacitor C3 negative pole connection circuit ground GND, dc/dc boost voltage stabilizing circuit IC1 the 5th pin connects output voltage regulation circuit,
Output voltage regulation circuit: dc/dc boost voltage stabilizing circuit IC1 the 5th pin connecting resistance R3 one end and resistance R4 one end, another termination electrochemical capacitor of resistance R4 C3 positive pole, resistance R3 other end connection circuit ground GND;
Usb circuit: USB interface selects the female mouth of A type USB, the cathode output end V+ of USB interface connects electrochemical capacitor C3 positive pole, the cathode output end V-connection circuit ground GND of USB interface, 3 ~ 6V DC power cathode is connected with circuit ground GND, the D-of USB interface data wire meets 3 ~ 6V DC power anode VCC by resistance R6, and the D+ of USB interface data wire is by resistance R5 connection circuit ground GND.
Components and parts title and important technological parameters
| Element number | Components and parts title | Leading indicator | Quantity | Remarks |
| IC1 | Dc/dc boost voltage stabilizing circuit | MC34063 | 1 | 8 pins, DIP encapsulate |
| D1 | 1N5825 (Schottky diode) | 3A/40V | 1 | Fly-wheel diode |
| C1 | Electrochemical capacitor | 470μF/16V | 1 | Vertical |
| C2 | Leaded Ceramic Disc Capacitor | 1000PF | 1 | Timing capacitor |
| C3 | Electrochemical capacitor | 470μF/16V | 1 | Or with 680 μ F/25V |
| L1 | Energy storage inductor (core cross section EI25) | 150μH、2A | 1 | Or use toroidal core |
| R1 | Metalfilmresistor | 0.18Ω、1W | 1 | For overcurrent protection |
| R2 | Metalfilmresistor | 180Ω | 1 | 1/8W |
| R3 | Metalfilmresistor | 2.2KΩ | 1 | 1/8W |
| R4 | Metalfilmresistor | 12～36KΩ | 1 | Need adjustment |
| R5 | Metalfilmresistor | 22KΩ | 1 | 1/8W |
| R6 | Metalfilmresistor | 36KΩ | 1 | 1/8W |
| USB | USB interface | The female mouth of A type USB | ? | The highly versatile of A type |
Circuit production main points and circuit debugging
The making of energy storage inductor L1: FERRITE CORE selects model to be EI25, tongue cross section 6.5mm × 6.5mm, tie up with electrician's adhesive waterproof tape after completing around 32 ~ 35 circles skeleton higher slice is flat with 6 strands of ￠ 0.29 ~ 0.31mm enamelled wires, then soak with the epoxy glues such as 504 and seal;
Monitor with digital voltmeter the magnitude of voltage that USB interface exports, based on the resistance of adjusting resistance R4, the resistance of adjusting resistance R3 is auxiliary, and the resistance of adjusting resistance R4 makes USB interface output voltage be 5V;
Resistance R1 is overcurrent protection resistance, and its resistance larger overcurrent protection act is sensitiveer;
According to the component parameter that embodiment is recommended, USB interface output voltage is 5V, its stand-by operation electric current≤1mA.
Direct current input voltage is 3 ~ 6V, and input voltage is higher, and its power supply conversion efficiency is larger;
Continuous operation output current >=1000mA, advises as integrated circuit MC34063 installs radiator additional;
Not key technology of the present invention as the outward appearance of circuit components layout of the present invention, board design, portable power source and size etc., neither the technology contents of application claims protection, therefore illustrate no longer one by one in the description.
Claims (1)
1. a USB digital equipment portable power source, it comprises 3 ~ 6V DC power supply, dc/dc boost voltage stabilizing circuit, output voltage regulation circuit, usb circuit, it is characterized in that:
Described dc/dc boost voltage stabilizing circuit is by dc/dc boost voltage stabilizing circuit IC1, overcurrent protection resistance R1, timing capacitor C2, energy storage inductor L1, sustained diode 1 and electrochemical capacitor C3 form, the model that dc/dc boost voltage stabilizing circuit IC1 selects is MC34063, 3 ~ 6V DC power anode VCC connects dc/dc boost voltage stabilizing circuit IC1 the 6th pin and overcurrent protection resistance R1 one end and electrochemical capacitor C1 positive pole, electrochemical capacitor C1 negative pole connection circuit ground GND, dc/dc boost voltage stabilizing circuit IC1 the 7th pin takes over the stream protective resistance R1 other end and resistance R2 one end and energy storage inductor L1 one end, dc/dc boost integrated regulator IC1 the 8th pin connecting resistance R2 other end, dc/dc boost voltage stabilizing circuit IC1 the 1st pin connects the energy storage inductor L1 other end and sustained diode 1 positive pole, dc/dc boost voltage stabilizing circuit IC1 the 3rd pin connects one end of timing capacitor C2, dc/dc boost voltage stabilizing circuit IC1 the 2nd pin and the 4th pin meet the timing capacitor C2 other end and circuit ground GND, sustained diode 1 negative pole connects electrochemical capacitor C3 positive pole, electrochemical capacitor C3 negative pole connection circuit ground GND, dc/dc boost voltage stabilizing circuit IC1 the 5th pin connects output voltage regulation circuit,
In described output voltage regulation circuit, dc/dc boost voltage stabilizing circuit IC1 the 5th pin connecting resistance R3 one end and resistance R4 one end, another termination electrochemical capacitor of resistance R4 C3 positive pole, resistance R3 other end connection circuit ground GND;
In described usb circuit, USB interface selects the female mouth of A type USB, the output head anode V+ of USB interface connects electrochemical capacitor C3 positive pole, the negative pole of output end V-connection circuit ground GND of USB interface, 3 ~ 6V DC power cathode is connected with circuit ground GND, the D-of USB interface data wire meets 3 ~ 6V DC power anode VCC by resistance R6, and the D+ of USB interface data wire is by resistance R5 connection circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587162.XA CN104283286A (en) | 2014-10-28 | 2014-10-28 | USB digital device mobile power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587162.XA CN104283286A (en) | 2014-10-28 | 2014-10-28 | USB digital device mobile power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104283286A true CN104283286A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410587162.XA Pending CN104283286A (en) | 2014-10-28 | 2014-10-28 | USB digital device mobile power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104283286A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2572610Y (en) * | 2002-09-22 | 2003-09-10 | 刘敏 | Double connector for ombile telephone set and computer |
| CN202424514U (en) * | 2012-02-27 | 2012-09-05 | 刘德军 | Small-power direct-current-to-direct-current boosting voltage stabilizer |
| CN203289156U (en) * | 2013-06-20 | 2013-11-13 | 曹思宇 | Novel mobile phone mobile power supply |
| CN203368122U (en) * | 2013-05-30 | 2013-12-25 | 齐齐哈尔市宝宏科技有限公司 | Switcher power-conversion device |
| CN203368103U (en) * | 2013-08-08 | 2013-12-25 | 方洪福 | Multifunctional mobile power supply |
-
2014
- 2014-10-28 CN CN201410587162.XA patent/CN104283286A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2572610Y (en) * | 2002-09-22 | 2003-09-10 | 刘敏 | Double connector for ombile telephone set and computer |
| CN202424514U (en) * | 2012-02-27 | 2012-09-05 | 刘德军 | Small-power direct-current-to-direct-current boosting voltage stabilizer |
| CN203368122U (en) * | 2013-05-30 | 2013-12-25 | 齐齐哈尔市宝宏科技有限公司 | Switcher power-conversion device |
| CN203289156U (en) * | 2013-06-20 | 2013-11-13 | 曹思宇 | Novel mobile phone mobile power supply |
| CN203368103U (en) * | 2013-08-08 | 2013-12-25 | 方洪福 | Multifunctional mobile power supply |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150114 |