CN204103536U - Portable power source circuit - Google Patents
Portable power source circuit Download PDFInfo
- Publication number
- CN204103536U CN204103536U CN201420441667.0U CN201420441667U CN204103536U CN 204103536 U CN204103536 U CN 204103536U CN 201420441667 U CN201420441667 U CN 201420441667U CN 204103536 U CN204103536 U CN 204103536U
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- circuit
- connects
- chip microcomputer
- power source
- pmos
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of portable power source circuit, belong to electronic circuit technology field.It comprises single-chip microcomputer, DC/DC boost conversion module, filtering and energy-storage module, output control module, battery interface module and sampling module and display circuit; Described DC/DC boost conversion module comprises inductance L 1, nmos circuit and PMOS circuit, one end of described inductance L 1 connects battery interface module, the other end connects the drain electrode of described NMOS and the drain electrode of described PMOS respectively, and the source electrode of described PMOS connects described filtering and energy-storage module and output control module successively; Described single-chip microcomputer exports a road DH-PWM signal output part and a road CH-PWM signal output part, and described DH-PWM signal output part connects the grid of described NMOS, and described CH-PWM signal output part connects the grid of described PMOS.The technical program makes DC/DC change-over circuit can by Single-chip Controlling, and output and input can share, and have conversion efficiency high, reliability is high, low cost and other advantages.
Description
Technical field
The utility model relates to electronic circuit technology field, especially relates to the control circuit technical field of portable power source.
Background technology
Portable power source is a kind of portable charging apparatus integrating power supply and charge function, can charge whenever and wherever possible or standby power to digital equipments such as mobile phones.Portable power source circuit generally includes battery and a series of control circuit.
At present, above market, most of portable power source is all made up of a micro USB input interface and a USB2.0 output interface or a micro USB input interface and multiple USB2.0 output interface.And main control chip single-chip microcomputer only achieves the electric power detection in common function, defencive function, communication function, Presentation Function.Charge Management and DC/DC change-over circuit are all completed by independent chip design.So just do not play the abundant functional resources of single-chip microcomputer completely, and multiple interface increases by cost, circuit conversion efficiency reduces, and the failure rate of circuit increases.
Utility model content
The utility model, in order to overcome the deficiencies in the prior art, provides a kind of portable power source circuit, its objective is to solve that existing portable power source circuit function is single, circuit transformation efficiency is low, poor reliability and the high problem of cost.
In order to solve above-mentioned technical problem, the basic technical scheme that the utility model proposes is: a kind of portable power source circuit, comprises single-chip microcomputer, DC/DC boost conversion module, filtering and energy-storage module, output control module, battery interface module and sampling module and display circuit;
Described DC/DC boost conversion module comprises inductance L 1, NMOS and PMOS, one end of described inductance L 1 connects battery interface module, the other end connects the drain electrode of described NMOS and the drain electrode of described PMOS respectively, and the source electrode of described PMOS connects described filtering and energy-storage module and output control module successively;
Described sampling module comprises current sampling circuit and battery voltage sampling circuit, and the input of described current sampling circuit connects described output control module, and its output connects single-chip microcomputer, and the output of described battery voltage sampling circuit connects described single-chip microcomputer;
Described single-chip microcomputer exports a road DH-PWM signal output part and a road CH-PWM signal output part, and described DH-PWM signal output part connects the grid of described NMOS, and described CH-PWM signal output part connects the grid of described PMOS.
In portable power source circuit described in the utility model, described NMOS comprises NMOS tube, and described NMOS tube connects the DH-PWM signal output part of described single-chip microcomputer by a resistance.
In portable power source circuit described in the utility model, described PMOS comprises PMOS, and described PMOS connects the CH-PWM signal output part of described single-chip microcomputer by a resistance.
In portable power source circuit described in the utility model, described output control module comprises output, input and output control circuit, described output control circuit comprises a NMOS tube and two resistance, the drain electrode of described NMOS tube is connected with described output, the grid of described NMOS tube is electrically connected with single-chip microcomputer by one of them resistance, and the source electrode of described NMOS is electrically connected with circuit negative terminal.
In portable power source circuit described in the utility model, described output and described input are also unified into an interface.
In portable power source circuit described in the utility model, described filtering and energy-storage module comprise the filter circuit and accumulator that are electrically connected successively, and described filter circuit connects the source electrode of described PMOS, and described accumulator connects described output control module; Wherein, described filter circuit is made up of three electric capacity in parallel, and described accumulator is made up of a storage capacitor.
In portable power source circuit described in the utility model, described single-chip microcomputer also connects described display circuit by three, I/O mouth, and described display circuit includes six LED and two resistance.
In portable power source circuit described in the utility model, an I/O mouth of described single-chip microcomputer connects an extraneous control connection end.
In portable power source circuit described in the utility model, an I/O mouth of described single-chip microcomputer is connected with lighting circuit, and described lighting circuit is a LED.
The beneficial effects of the utility model are:
The utility model adopts a single-chip microcomputer to carry out the output input of control circuit, by DC/DC boost conversion module, Circuit display circuit and connect extraneous control connection end, achieve the multifunction of portable power source circuit, only need a single-chip microcomputer with regard to the control to whole circuit can be realized, avoid the drawback in the past being carried out control circuit by multiple control chip; In addition, the DC/DC boost conversion module that the utility model uses can improve the conversion efficiency of portable power source circuit; Finally, output and input parallel connection are integrated into an interface by the utility model, reduce the quantity of interface, reduce costs also easy to use.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of portable power source circuit described in the utility model;
Fig. 2 is the physical circuit figure indicating the portable power source circuit of symbol described in Fig. 1;
Fig. 3 is the physical circuit figure of the portable power source circuit described in Fig. 1.
Embodiment
Be described further below with reference to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3 pairs of the utility model, but protection range of the present utility model should do not limited with this.
Contrast Fig. 1 to Fig. 3:
Portable power source circuit described in the utility model comprises single-chip microcomputer 10, DC/DC boost conversion module 20, filtering and energy-storage module 30, output control module 40, battery interface module 50, sampling module 60 and display circuit 70, lighting circuit 80 and extraneous control connection end 90.
Wherein, described single-chip microcomputer comprises interface 1,2,3,4,5,6,7,8,9,10,11,12,13 and 14; Wherein, described 5 and 6 CH-PWM signal output part and DH-PWM signal output part is exported separately.
Described DC/DC boost conversion module 20 comprises inductance L 1, nmos circuit and PMOS circuit, the left end of described inductance L 1 connects battery interface module 50, right-hand member connects the drain electrode of described NMOS and the drain electrode of described PMOS respectively, and the source electrode of described PMOS connects described filtering and energy-storage module 30 and output control module 40 successively.Wherein, NMOS comprises NMOS tube Q2, described NMOS tube Q2 connects the DH-PWM signal output part 6 of described single-chip microcomputer 10 by a resistance R12, and the connection electric wire between resistance R2 and NMOS tube Q2 also leads to resistance R11, the negative terminal of other one end connecting circuit of this resistance R11.Described PMOS comprises PMOS Q3, and described PMOS Q3 connects the CH-PWM signal output part 5 of described single-chip microcomputer 10 by a resistance R13, and in addition, described PMOS Q3 is also parallel with resistance R14.
Described filtering and energy-storage module 30 comprise the filter circuit 301 and accumulator 302 that are electrically connected from left to right successively, and described filter circuit 301 connects the source electrode of described PMOS, and described accumulator 302 connects described output control module 40; Wherein, described filter circuit 301 is made up of three electric capacity C7, C8 and C9 in parallel, and described accumulator is made up of a storage capacitor C5.
Described output control module 40 comprises output J1, input J2 and output control circuit 401, and described output J1 and input J2 is also unified into an interface 402; Described output control circuit 401 comprises a NMOS tube Q4 and resistance R15 and R16, and R16 is in parallel with NMOS tube Q4 for this resistance; The drain electrode of described NMOS tube Q4 is connected with interface 402, and the grid of described NMOS tube Q4 is electrically connected with single-chip microcomputer 10 by resistance R15, and the source electrode of described NMOS tube Q4 is electrically connected with circuit negative terminal.
Described sampling module 60 comprises current sampling circuit 601 and battery voltage sampling circuit 602, and described current sampling circuit 601 not only can gather output signal but also can Gather and input signal.Wherein, the input of described current sampling circuit 601 comprises resistance R17, resistance R18 and resistance R1 and electric capacity C2, as diagram, resistance R17 connects described output control module 40, its output connects the interface 13 of single-chip microcomputer 10, and described battery voltage sampling circuit 602 comprises resistance R6 and resistance R7, and wherein the left end of R7 connects the interface 10 of single-chip microcomputer 10, resistance R6 described in drawing at the left end of R7, this resistance R6 connects the interface 12 of single-chip microcomputer 10.
Described display circuit 70 comprises resistance R8, a resistance R9 and six LED D1, D2, D3, D4, D5 and D6, described single-chip microcomputer 10 connects described LED D1, D2, D3, D4, D5 and D6 respectively by resistance R8, resistance R9, and concrete annexation as shown in the figure.
Described extraneous control connection end 90 comprises a button S1 and resistance R10, and the two ends of described resistance R10 connect the left end connection button S1 of the interface 1 and 4, resistance R10 of single-chip microcomputer 10 respectively.
In figure, lighting circuit connects an I/O interface of single-chip microcomputer 10, i.e. the interface 8 of single-chip microcomputer 10 in figure, and this lighting circuit is a LED D7.
During specific works, BAT+ and BAT-in figure accesses lithium ion battery, needs the load electronic equipment of charging from interface 402 place in circuit.
When outside has 5V power supply to input, interface 402 will be linked into, single-chip microcomputer 10 is by after receiving the signal that sends of battery voltage sampling circuit 602, and single-chip microcomputer 10 is converted to mode of operation by standby mode and judges external input voltage thus whether in the voltage range of setting; If fruit outer power voltage is not when arranging in voltage range, the control end sending a signal to output control circuit 401 is disconnected the connection with external power source with control input end by single-chip microcomputer 10, stops output pwm signal simultaneously.If outer power voltage is in the scope arranged, single-chip microcomputer 10 controls external power source by transmitting control signal to the control end of output control circuit 401 to be passed through, single-chip microcomputer 10 is by the detection to battery voltage sampling circuit 602 simultaneously, judges whether that output pwm signal carries out trickle charge pattern, constant current charging mode or constant voltage charge pattern with control PMOS.As cell voltage≤3.0V, be trickle charge pattern, charging current is arrange charging current 2/10ths; When cell voltage is higher than 3.0V and lower than 4.2V, be constant current charging mode, charging current is for arranging charging current; Cell voltage, just in time when 4.2V, is constant voltage charge pattern, and now charged electrical fails to be convened for lack of a quorum and linearly reduces, until when charging current is arrange charging current 2/10ths, charging process terminates.While judging charge mode, single-chip microcomputer 10 can detect the signal from current sampling circuit 601 simultaneously, and whether judge to export has load to connect.Its judge according to being: the tube voltage drop that the internal resistance of NMOS Q4 of output control circuit 401 own produces, deliver to single-chip microcomputer 10 through current sampling circuit 601 sampling and process.When the tube voltage drop of Nmos Q4 exceeds settings, show that output has had load to connect, now single-chip microcomputer 10 will start discharge and recharge automatic control mode, the PWM port of charge closing, will directly to load supplying by external power source VCC; And when portable power source external load equipment is full of, single-chip microcomputer 10 detects this situation by current sampling circuit 601, thus the PWM port restarting charging is to portable power source inside lithium cell charging, until be full of.This automated intelligent of single-chip microcomputer 10 controls, and effectively improves the useful life of portable power source lithium ion battery and the reliability of portable power source.
During work, DC/DC boost conversion module 20 exports after lithium ion battery battery voltage rise to 5V, and the two-way pwm signal that single-chip microcomputer 10 exports is driving N metal-oxide-semiconductor Q2 and PMOS Q3 respectively, when switch Nmos pipe Q2 conducting, and during PMOS Q3 cut-off, lithium ion battery output voltage flows through inductance L 1 energy storage; When switch NMOS tube Q2 ends, and during PMOS Q3 conducting, the energy stored in inductance L 1 supplies output by PMOS Q3, now that voltage in inductance L 1 and lithium ion battery voltage are connected in series through PMOS Q3 and supply output, so the voltage be added on output is higher than lithium ion battery voltage, therefore reach the object of DC/DC boost conversion module 20 boost conversion.The electric current that in the course of work, battery flows out is continuous print, but flowing through PMOS Q3 is pulse, so there has been the existence of filter circuit 301, also charges to accumulator 302 simultaneously.When PMOS Q3 ends, the voltage of output just starts to decline, and now accumulator 302 discharges to output again, so load still has stable also continuous print electric current.Again because now single-chip microcomputer 10 supply voltage is provided by output, so Error processing will be carried out to 1/4 supply voltage in single-chip microcomputer 10 inside, and after carrying out application condition with the reference voltage of single-chip microcomputer 10 inside, control the pulse duration that two-way pwm signal exports, obtain again the stable 5V voltage that we need thus on the output.
Single-chip microcomputer 10 is while completing said process; the protected location of its inside constantly will judge the generation of various mistake by the feedback signal of the supply voltage circuit of current sampling circuit 601 and single-chip microcomputer 10 inside, such as output overcurrent, output overvoltage, input overvoltage, input undervoltage, lithium ion battery exported situations such as putting, overcharge.The control end of control end and PWM output that the results conversion of judgement becomes control signal to be sent to output control circuit 401 by protected location is to complete protection act.Thus ensure that the safety of portable power source.
In addition, single-chip microcomputer 10 completes control to 6 LED D1, D2, D3, D4, D5 and D6 by 3 I/O mouths 2,3 and 7.The feedback signal of battery voltage sampling circuit 602 single-chip microcomputer 10 can be allowed to judge the electricity at this moment existing for lithium ion battery also has how many, and to be shown by LED D1, D2, D3, D4, D5 and D6.
Moreover, single-chip microcomputer 10 is completed by extraneous control connection end 90 Control on Communication of outside, namely come by button S1, resistance R10 and I/O mouth 1 and 4, touched button S1 and can complete the controls such as lighting circuit 80, LED D1, the startup of D2, D3, D4, D5 and D6 and DC/DC boost conversion module 20 and closedown.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (9)
1. a portable power source circuit, is characterized in that: comprise single-chip microcomputer, DC/DC boost conversion module, filtering and energy-storage module, output control module, battery interface module and sampling module and display circuit;
Described DC/DC boost conversion module comprises inductance L 1, NMOS and PMOS, one end of described inductance L 1 connects battery interface module, the other end connects the drain electrode of described NMOS and the drain electrode of described PMOS respectively, and the source electrode of described PMOS connects described filtering and energy-storage module and output control module successively;
Described sampling module comprises current sampling circuit and battery voltage sampling circuit, and the input of described current sampling circuit connects described output control module, and its output connects single-chip microcomputer, and the output of described battery voltage sampling circuit connects described single-chip microcomputer;
Described single-chip microcomputer exports a road DH-PWM signal output part and a road CH-PWM signal output part, and described DH-PWM signal output part connects the grid of described NMOS, and described CH-PWM signal output part connects the grid of described PMOS.
2. portable power source circuit as claimed in claim 1, it is characterized in that: described NMOS comprises NMOS tube, described NMOS tube connects the DH-PWM signal output part of described single-chip microcomputer by a resistance.
3. portable power source circuit as claimed in claim 1, it is characterized in that: described PMOS comprises PMOS, described PMOS connects the CH-PWM signal output part of described single-chip microcomputer by a resistance.
4. portable power source circuit as claimed in claim 1, it is characterized in that: described output control module comprises output, input and output control circuit, described output control circuit comprises a NMOS tube and two resistance, the drain electrode of described NMOS tube is connected with described output, the grid of described NMOS tube is electrically connected with single-chip microcomputer by one of them resistance, and the source electrode of described NMOS is electrically connected with circuit negative terminal.
5. portable power source circuit as claimed in claim 4, is characterized in that: described output and described input are also unified into an interface.
6. portable power source circuit as claimed in claim 1, it is characterized in that: described filtering and energy-storage module comprise the filter circuit and accumulator that are electrically connected successively, described filter circuit connects the source electrode of described PMOS, and described accumulator connects described output control module; Wherein, described filter circuit is made up of three electric capacity in parallel, and described accumulator is made up of a storage capacitor.
7. portable power source circuit as claimed in claim 1, it is characterized in that: described single-chip microcomputer also connects described display circuit by three, I/O mouth, described display circuit includes six LED and two resistance.
8. portable power source circuit as claimed in claim 1, is characterized in that: an I/O mouth of described single-chip microcomputer connects an extraneous control connection end.
9. portable power source circuit as claimed in claim 1, is characterized in that: an I/O mouth of described single-chip microcomputer is connected with lighting circuit, and described lighting circuit is a LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441667.0U CN204103536U (en) | 2014-08-07 | 2014-08-07 | Portable power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441667.0U CN204103536U (en) | 2014-08-07 | 2014-08-07 | Portable power source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204103536U true CN204103536U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420441667.0U Expired - Fee Related CN204103536U (en) | 2014-08-07 | 2014-08-07 | Portable power source circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204103536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167784A (en) * | 2014-08-07 | 2014-11-26 | 深圳市超创鑫科技有限公司 | Portable power source circuit |
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2014
- 2014-08-07 CN CN201420441667.0U patent/CN204103536U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167784A (en) * | 2014-08-07 | 2014-11-26 | 深圳市超创鑫科技有限公司 | Portable power source circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20190807 |