CN107480750A - A kind of USB flash disk power supply circuit and POS - Google Patents
A kind of USB flash disk power supply circuit and POS Download PDFInfo
- Publication number
- CN107480750A CN107480750A CN201710624550.4A CN201710624550A CN107480750A CN 107480750 A CN107480750 A CN 107480750A CN 201710624550 A CN201710624550 A CN 201710624550A CN 107480750 A CN107480750 A CN 107480750A
- Authority
- CN
- China
- Prior art keywords
- usb flash
- flash disk
- circuit
- power supply
- comparator
- 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.)
- Granted
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007651 thermal printing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
- G06K19/07732—Physical layout of the record carrier the record carrier having a housing or construction similar to well-known portable memory devices, such as SD cards, USB or memory sticks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0702—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0715—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including means to regulate power transfer to the integrated circuit
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/12—Cash registers electronically operated
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Power Sources (AREA)
Abstract
The present invention discloses a kind of USB flash disk power supply circuit, including bleeder circuit, comparator and booster circuit, the bleeder circuit includes the first bleeder circuit and the second bleeder circuit, the input of first bleeder circuit is connected with lithium battery, the output end of first bleeder circuit and the normal phase input end of comparator connect, the output end of second bleeder circuit and the negative-phase input of comparator connect, the output end of the comparator and the enabled input of booster circuit connect, the output end of the booster circuit is connected with the input of the second bleeder circuit, the output end output USB flash disk supply voltage of the booster circuit.Invention additionally discloses a kind of POS for including above-mentioned USB flash disk power supply circuit.The present invention relates to POS technical field, a kind of USB flash disk power supply circuit and POS, realize only when USB flash disk inserts POS, USB flash disk power supply circuit just starts to power for USB flash disk, lithium battery utilization rate is improved, so as to reduce Overall Power Consumption, POS standby time and transaction duration is improved, improves product reliability.
Description
Technical field
The present invention relates to POS technical field, more particularly to a kind of USB flash disk power supply circuit and POS.
Background technology
POS is a kind of point-of-sale terminal with clearing of account function, be widely used in supermarket, chain store, hypermarket,
The places such as restaurant.Therefore, Mobile portable formula POS is increasingly favored by numerous clients.The portable most important skill of PO machines
Art difficult point is：In the basic function with traditional POS, powered using single lithium battery on the premise of, it is necessary to assure complete machine is treated
Machine time length, chain transaction time length.This has related to complete machine power-supply system power dissipation design, wherein, USB flash disk is conventional as POS
Software upgrade tool is, it is necessary to often access in POS, and in traditional design mode, USB flash disk Power Management Design is 5V, and is started shooting in machine
When, USB flash disk power circuit begins to work, Overall Power Consumption is increased 10mA, for the battery-powered POS of single-lithium-battery,
Continuing 10mA electric current can reduce by 10% stand-by time.
The content of the invention
In order to solve the above-mentioned technical problem, reduce Overall Power Consumption it is an object of the invention to provide one kind, improve single-lithium-battery
Battery-powered device standby duration and the USB flash disk power supply circuit using duration.
In order to solve the above-mentioned technical problem, reduce Overall Power Consumption it is a further object to provide one kind, improve list
Save the standby time of lithium battery power supply and the POS using duration.
The technical solution adopted in the present invention is：A kind of USB flash disk power supply circuit, including bleeder circuit, comparator and boosting electricity
Road, the bleeder circuit include the first bleeder circuit and the second bleeder circuit, input and the lithium electricity of first bleeder circuit
Pond is connected, and the output end of first bleeder circuit is connected with the normal phase input end of the comparator, second bleeder circuit
Output end be connected with the negative-phase input of the comparator, the output end of the comparator is enabled defeated with the booster circuit
Enter end connection, the output end of the booster circuit is connected with the input of second bleeder circuit, the booster circuit it is defeated
Go out end output USB flash disk supply voltage.
As the further improvement of such scheme, first bleeder circuit includes first resistor and second resistance, described
One end of first resistor is connected with lithium battery, the other end of the first resistor by second resistance of connecting with connecting power supply, institute
The intermediate node stated between first resistor and second resistance is connected with the normal phase input end of the comparator.
As the further improvement of such scheme, second bleeder circuit includes 3rd resistor, the 4th resistance, the first electricity
Appearance, the second electric capacity, the 3rd electric capacity and the first diode, the positive pole of first diode are connected with lithium battery, and the described 1st
The negative pole of pole pipe is connected with the output end of the booster circuit, and the negative pole of first diode passes through the 3rd electric capacity and the electricity of connecting
Connecting to source, the negative pole of first diode is also connected by 3rd resistor of connecting with the negative-phase input of the comparator,
One end of first electric capacity is connected with power supply, the other end of first electric capacity by connect second electric capacity with it is described
The negative-phase input connection of comparator, the connecting node between first electric capacity and second electric capacity are connected with lithium battery,
One end of 4th resistance is connected with lithium battery, and the other end of the 4th resistance is connected with power supply by the 3rd electric capacity of connecting
Connect.
As the further improvement of such scheme, the booster circuit includes boost chip, the output end of the comparator
It is connected with the enabled input of boost chip, the output end output USB flash disk supply voltage of the boost chip.
Preferably, the boost chip is SX1302 chips, SX1315 chips or BX8022 chips etc..
A kind of POS, it includes USB flash disk power supply circuit described above.
The beneficial effects of the invention are as follows：
A kind of USB flash disk power supply circuit, by the Voltage Feedback of booster circuit output to the second bleeder circuit, combined using comparator
First bleeder circuit and the second bleeder circuit, realize that USB flash disk power supply circuit just starts to power for USB flash disk only when USB flash disk inserts equipment,
Lithium battery utilization rate is improved, so as to reduce Overall Power Consumption, the standby time of equipment is improved and using duration, it is reliable to improve product
Property.
A kind of POS, by the Voltage Feedback of booster circuit output to the second bleeder circuit, first point is combined using comparator
Volt circuit and the second bleeder circuit, realize that USB flash disk power supply circuit just starts to power for USB flash disk, improves lithium only when USB flash disk inserts POS
Battery utilization rate, so as to reduce Overall Power Consumption, POS standby time and transaction duration are improved, improves product reliability, lifting is used
Family satisfaction.
Brief description of the drawings
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of USB flash disk power supply circuit theory diagram of the present invention；
Fig. 2 is a kind of USB flash disk power supply circuit schematic diagram of the present invention；
Fig. 3 is the circuit block diagram of POS power circuit of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.
Fig. 1 is a kind of USB flash disk power supply circuit theory diagram of the present invention, as shown in figure 1, a kind of USB flash disk power supply circuit, including partial pressure
Circuit, comparator and booster circuit.
Specifically, bleeder circuit includes the first bleeder circuit and the second bleeder circuit, the input of the first bleeder circuit with
Lithium battery connects, and in the present embodiment, lithium battery is 3.7V single lithium batteries, and the output end and comparator of the first bleeder circuit are just
Phase input connects, and the output end of the second bleeder circuit and the negative-phase input of comparator connect, the output end and liter of comparator
The enabled input connection of volt circuit, the output end of booster circuit are connected with the input of the second bleeder circuit, booster circuit
Output end exports USB flash disk supply voltage, and the output end of booster circuit can be connected with USB flash disk.
Fig. 2 is a kind of USB flash disk power supply circuit schematic diagram of the present invention, with reference to Fig. 1 and Fig. 2, in the USB flash disk power supply circuit, and first point
Volt circuit includes first resistor R1 and second resistance R2, and first resistor R1 one end is connected with lithium battery VCC-BAT, first resistor
The R1 other end by with connecting second resistance R2 connection power supplys, intermediate node between first resistor R1 and second resistance R2 with
Comparator U1B normal phase input end+connection.
Second bleeder circuit includes 3rd resistor R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity
The output end connection of C3 and the first diode D1, the first diode D1 negative pole and booster circuit, the first diode D1 negative pole
By connecting, the 3rd electric capacity C3 is connected with power supply, and the first diode D1 negative pole also passes through 3rd resistor R3 and the comparator of connecting
U1B negative-phase input-connection, the first electric capacity C1 one end are connected with power supply, and the first electric capacity C1 other end passes through series connection
Second electric capacity C2 and comparator U1B negative-phase input-be connected.Connecting node between first electric capacity C1 and the second electric capacity C2 with
Lithium battery VCC-BAT connections, the 4th resistance R4 one end are connected with lithium battery VCC-BAT, the other end of the 4th resistance R4
By connecting, the 3rd electric capacity C3 is connected with power supply.
Specifically, booster circuit includes boost chip U2, boost chip U2 can be SX1302 chips, SX1315 chips or
Person's BX8022 chips etc..In the present embodiment, booster circuit also includes the 5th resistance R5 and the 4th electric capacity C4, comparator U1B's
Output end is connected by the 5th resistance R5 that connects with boost chip U2 enabled input, and comparator U1B output end also passes through
With connecting the 5th resistance R5 and the 4th electric capacity C4 connection power supplys.Boost chip U2 output end VCC-USB5V outputs 5V USB flash disk supplies
Piezoelectric voltage.Boost chip U2 output end VCC-USB5V is used to be connected with USB flash disk socket J1 voltage input end VBUS, is carried for USB flash disk
For working power.
First resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance value are adjusted, when use single-unit lithium
When battery powered equipment is not inserted into USB flash disk, the voltage of comparator U1B negative-phase input is approximately equal to lithium battery VCC-BAT electricity
Pressure, the level of comparator U1B negative-phase input are higher than the level of normal phase input end, now, comparator U1B output low levels,
Boost chip U2 enabled input is low level, and boost chip U2 is in inactive state.Powered when using single lithium battery
Equipment insertion USB flash disk when, because in USB flash disk there is internal resistance in circuit so that the partial pressure value of comparator U1B negative-phase input reduces,
Cause comparator U1B normal phase input end level to be higher than the level of inverting input, now, comparator U1B output high level, rise
Pressure chip U2 enabled input is high level, and boost chip U2 starts, and the 5V voltages of boost chip U2 output temperatures supply for USB flash disk
Electricity.
A kind of USB flash disk power supply circuit, by the Voltage Feedback of booster circuit output to the second bleeder circuit, combined using comparator
First bleeder circuit and the second bleeder circuit, realize that USB flash disk power supply circuit just starts to power for USB flash disk only when USB flash disk inserts equipment,
Lithium battery utilization rate is improved, so as to reduce Overall Power Consumption, the standby time of equipment is improved and using duration, it is reliable to improve product
Property.
Fig. 3 is the circuit block diagram of POS power circuit of the present invention, with reference to Fig. 2 and Fig. 3, a kind of POS, and the power supply of POS
Circuit includes 3.7V chargeable lithium cells, above-mentioned USB flash disk power supply circuit, wherein, 3.7V chargeable lithium cells are as POS system electricity
Source, POS show that power supply, magnetic card/IC-card/non-connect card power supply and camera/probe power supply, respectively POS system, POS
Machine display screen, POS magnetic card/IC-card/non-connect card and camera/probe provides operating voltage, and 3.7V chargeable lithium cells lead to
It is 5V that USB flash disk power supply circuit, which is crossed, by 3.7V boostings, and the 5V voltages after boosting can be used as thermal printing electromechanical source and USB flash disk power supply.
First resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance value are adjusted, when use single-unit lithium
When battery powered POS is not inserted into USB flash disk, the voltage of comparator U1B negative-phase input is approximately equal to lithium battery VCC-BAT electricity
Pressure, the level of comparator U1B negative-phase input are higher than the level of normal phase input end, now, comparator U1B output low levels,
Boost chip U2 enabled input is low level, and boost chip U2 is in inactive state.Powered when using single lithium battery
POS insertion USB flash disk when, because in USB flash disk there is internal resistance in circuit so that the partial pressure value of comparator U1B negative-phase input reduces,
Cause comparator U1B normal phase input end level to be higher than the level of inverting input, now, comparator U1B output high level, rise
Pressure chip U2 enabled input is high level, and boost chip U2 starts, and the 5V voltages of boost chip U2 output temperatures supply for USB flash disk
Electricity.Single lithium battery is opened without the IC that will just be boosted when POS is started shooting and exports constant 5V power supplys, only inserts POS in USB flash disk
When, USB flash disk power supply circuit just starts to power for USB flash disk, so as to reduce Overall Power Consumption, improves the standby of single lithium battery power supply POS
Duration and transaction duration, improve Consumer's Experience.
A kind of POS, by the Voltage Feedback of booster circuit output to the second bleeder circuit, first point is combined using comparator
Volt circuit and the second bleeder circuit, realize that USB flash disk power supply circuit just starts to power for USB flash disk, improves lithium only when USB flash disk inserts POS
Battery utilization rate, so as to reduce Overall Power Consumption, POS standby time and transaction duration are improved, improves product reliability, lifting is used
Family satisfaction.
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent variations on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (6)
1. a kind of USB flash disk power supply circuit, it is characterised in that it includes bleeder circuit, comparator and booster circuit, the bleeder circuit
Including the first bleeder circuit and the second bleeder circuit, the input of first bleeder circuit is connected with lithium battery, and described first
The output end of bleeder circuit is connected with the normal phase input end of the comparator, the output end of second bleeder circuit and the ratio
Negative-phase input compared with device is connected, and the output end of the comparator is connected with the enabled input of the booster circuit, the liter
The output end of volt circuit is connected with the input of second bleeder circuit, the output end output USB flash disk power supply of the booster circuit
Voltage.
2. a kind of USB flash disk power supply circuit according to claim 1, it is characterised in that first bleeder circuit includes first
Resistance and second resistance, one end of the first resistor are connected with lithium battery, and the other end of the first resistor passes through series connection the
Two resistance connection power supply, the normal phase input end of intermediate node and the comparator between the first resistor and second resistance
Connection.
3. a kind of USB flash disk power supply circuit according to claim 2, it is characterised in that second bleeder circuit includes the 3rd
Resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the first diode, the positive pole and lithium of first diode
Battery is connected, and the negative pole of first diode is connected with the output end of the booster circuit, the negative pole of first diode
By connecting, the 3rd electric capacity is connected with power supply, and the negative pole of first diode also passes through 3rd resistor and the comparison of connecting
The negative-phase input connection of device, one end of first electric capacity are connected with power supply, and the other end of first electric capacity passes through string
Join second electric capacity to be connected with the negative-phase input of the comparator, the company between first electric capacity and second electric capacity
Connect node to be connected with lithium battery, one end of the 4th resistance is connected with lithium battery, and the other end of the 4th resistance passes through string
Join the 3rd electric capacity to be connected with power supply.
A kind of 4. USB flash disk power supply circuit according to claim 3, it is characterised in that the booster circuit includes boost chip,
The output end of the comparator and the enabled input of boost chip connect, the output end output USB flash disk power supply of the boost chip
Voltage.
A kind of 5. USB flash disk power supply circuit according to claim 4, it is characterised in that the boost chip be SX1302 chips,
SX1315 chips or BX8022 chips.
6. a kind of POS, it is characterised in that it includes the USB flash disk power supply circuit as described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624550.4A CN107480750B (en) | 2017-07-27 | 2017-07-27 | USB flash disk power supply circuit and POS machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624550.4A CN107480750B (en) | 2017-07-27 | 2017-07-27 | USB flash disk power supply circuit and POS machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107480750A true CN107480750A (en) | 2017-12-15 |
| CN107480750B CN107480750B (en) | 2020-10-23 |
Family
ID=60597279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710624550.4A Active CN107480750B (en) | 2017-07-27 | 2017-07-27 | USB flash disk power supply circuit and POS machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107480750B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202721471U (en) * | 2012-07-31 | 2013-02-06 | Tcl集团股份有限公司 | Mobile battery box |
| CN103475377A (en) * | 2013-08-22 | 2013-12-25 | 潍坊歌尔电子有限公司 | Key control system of single-battery power supply system |
| CN204316115U (en) * | 2014-11-29 | 2015-05-06 | 福建新大陆支付技术有限公司 | A kind of POS power supply circuits adopting single lithium battery |
| EP3098950A1 (en) * | 2015-05-29 | 2016-11-30 | Eaton Corporation | Single stage low voltage input dc/ac inverter |
-
2017
- 2017-07-27 CN CN201710624550.4A patent/CN107480750B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202721471U (en) * | 2012-07-31 | 2013-02-06 | Tcl集团股份有限公司 | Mobile battery box |
| CN103475377A (en) * | 2013-08-22 | 2013-12-25 | 潍坊歌尔电子有限公司 | Key control system of single-battery power supply system |
| CN204316115U (en) * | 2014-11-29 | 2015-05-06 | 福建新大陆支付技术有限公司 | A kind of POS power supply circuits adopting single lithium battery |
| EP3098950A1 (en) * | 2015-05-29 | 2016-11-30 | Eaton Corporation | Single stage low voltage input dc/ac inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107480750B (en) | 2020-10-23 |
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