CN104270000A - Thermal printer power supply soft start system for POS machine - Google Patents
Thermal printer power supply soft start system for POS machine Download PDFInfo
- Publication number
- CN104270000A CN104270000A CN201410459569.4A CN201410459569A CN104270000A CN 104270000 A CN104270000 A CN 104270000A CN 201410459569 A CN201410459569 A CN 201410459569A CN 104270000 A CN104270000 A CN 104270000A
- Authority
- CN
- China
- Prior art keywords
- power supply
- control signal
- resistance
- output end
- power
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/346—Passive non-dissipative snubbers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
The invention discloses a thermal printer power supply soft start system for a POS machine. The thermal printer power supply soft start system comprises a control signal input end, a power supply input end, a switching circuit, a buffer capacitor and a power supply output end. The buffer capacitor is added to the thermal printer power supply system, a printer is slowly started the moment a power supply is powered on, damage of instant high voltage differences to the thermal printer is reduced, the repair rate of products is decreased, the reliability and durability of the products are improved, and the user satisfaction degree about the products is improved. The thermal printer power supply soft start system is simple in structure and low in design and production cost and has good economic and social benefits. The thermal printer power supply soft start system can be widely applied to various POS machines.
Description
Technical field
The present invention relates to POS field, particularly relate to the thermal printer power-supply system of POS.
Background technology
POS is a kind of point-of-sale terminal with clearing of account function, is widely used in the places such as supermarket, chain store, hypermarket, restaurant.Thermal printer in POS can print transaction sales slip by the mode heating heat-sensitive paper, and the volume of thermal printer can be placed in POS completely simultaneously.Thermal printer only completes in transaction, just can power on when printing transaction sales slip.
Traditional thermal printer power circuit directly directly will access printer through DC8.5V by metal-oxide-semiconductor, after CPU controls metal-oxide-semiconductor conducting, DC8.5V directly accesses printer, be easy to cause printer to access voltage instantaneous like this uprise, burn printer, after printer damages, product must be returned factory and keep in repair by user, has both increased product repair rate and has again reduced satisfaction, the Brand Recognition degree of user to product quality.In addition, in the circuit of traditional design, when printer power supply is opened, Switching Power Supply can be needed to provide larger current instantaneously, comparatively large to the damage of power supply like this, easily cause the reduction in Switching Power Supply useful life.
Therefore, there is the problem easily causing printer power supply overvoltage, easy burn-out printer in the traditional design mode of thermal printer power circuit, adds maintenance cost, reduces the degree of recognition of user to product quality.
Summary of the invention
In order to solve the problems of the technologies described above, the object of this invention is to provide one and can prevent printer startup transient voltage from uprising, effectively avoiding printer power supply overvoltage, extend the thermal printing electromechanical source delay startup system in printer life-span.
The technical solution adopted in the present invention is:
For a thermal printing electromechanical source delay startup system for POS, it comprises: control signal input, for receiving the control signal from POS control circuit; Power input, is connected with switching circuit, for providing power supply signal; Switching circuit, is connected with control signal input, power input and power output end respectively, for controlling power input out-put supply signal according to control signal to power output end; Buffer capacitor, is connected with switching circuit respectively and power output end connects, and be provided for power output end when receiving power supply signal, output voltage slowly raises; Power output end, for powering to thermal printer.
Preferably, described buffer capacitor is electrochemical capacitor.
Preferably, the capacity of described electrochemical capacitor is 220uF.
Preferably, described switching circuit comprises triode and metal-oxide-semiconductor, the base stage of described triode is connected to control signal input by the second resistance and the first resistance successively, the base stage of described triode is by the 3rd grounding through resistance, the grounded emitter of described triode, the collector electrode of described triode is connected to the grid of metal-oxide-semiconductor successively by the 4th resistance and the 5th resistance, the grid of described metal-oxide-semiconductor is connected to power input by the 6th resistance, the source electrode of described metal-oxide-semiconductor is connected to power input, the drain electrode of described metal-oxide-semiconductor is connected to power output end, described power output end is by buffer capacitor ground connection.
Preferably, it also comprises control signal test side, and described control signal test side is connected to the base stage of triode by the second resistance.
Preferably, described control signal input is by the first capacity earth, and described 6th resistor coupled in parallel has the second electric capacity, and described buffer capacitor is parallel with the 7th resistance.
Preferably, described power input is direct current 8.5V input.
The invention has the beneficial effects as follows:
The present invention by increasing buffer capacitor in thermal printer power-supply system, the moment powered at printer power supply is slowly opened, reduces instantaneous pressure difference to the injury of thermal printer, reduce product repair rate, improve product reliability and durability, and then improve the user satisfaction of product.Structure of the present invention is simple, design and production cost low, there is good economic and social benefit.
The present invention can be widely used in the thermal printer power-supply system of various POS.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is the circuit theory diagrams of an embodiment of the present invention;
Fig. 2 is that traditional thermal printer power system circuit power input and power output end are at the voltage oscillogram of surrounding time that powers on;
Fig. 3 is that power input of the present invention and power output end are at the voltage oscillogram of surrounding time that powers on.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 1, as a kind of preferred embodiment of the present invention, a kind of thermal printing electromechanical source delay startup system for POS comprises:
Control signal input PRT-PWR, for receiving the control signal from POS control circuit.Wherein, control signal is from the control circuit of POS inside.
Power input VCC, is connected with switching circuit, for providing power supply signal.In the present embodiment, power input VCC input power is direct current 8.5V.
Switching circuit, is connected with control signal input PRT-PWR, power input VCC and power output end VPRN respectively, for controlling power input VCC out-put supply signal according to control signal to power output end VPRN.Wherein, switching circuit comprises triode Q1 and metal-oxide-semiconductor Q2, the base stage of described triode Q1 is connected to control signal input PRT-PWR by the second resistance R2 and the first resistance R1 successively, the base stage of described triode Q1 is by the 3rd resistance R3 ground connection, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 is connected to the grid G of metal-oxide-semiconductor Q2 successively by the 4th resistance R4 and the 5th resistance R5, the grid G of described metal-oxide-semiconductor Q2 is connected to power input VCC by the 6th resistance R6, the source S of described metal-oxide-semiconductor Q2 is connected to power input VCC, the drain D of described metal-oxide-semiconductor Q2 is connected to power output end VPRN, described power output end VPRN is by buffer capacitor C3 ground connection.
Buffer capacitor C3, is connected with switching circuit respectively and power output end VPRN connects, and be provided for power output end VPRN when receiving power supply signal, output voltage slowly raises.In the present embodiment, buffer capacitor C3 adopts electrochemical capacitor, and its capacitance is 220uF.
Power output end VPRN, for powering to thermal printer.
Preferably, it also comprises control signal test side PRT-PWR#, and described control signal test side PRT-PWR# is connected to the base stage of triode Q1 by the second resistance R2.Can whether normally be sent to by detection control signal by control signal test side PRT-PWR#.
Preferably, described control signal input PRT-PWR is by the second electric capacity C2C1 ground connection, and described 6th resistance R6 is parallel with the second electric capacity, and described buffer capacitor C3 is parallel with the 7th resistance R7.Second electric capacity C2C1 and the second capacitor strobe, and the 7th resistance R7 is as load resistance.
The course of work of the present invention is described in detail in detail below:
When the printer of POS does not work, the control signal that POS control circuit exports is low level, and now triode Q1 and metal-oxide-semiconductor Q2 is in off state, and printer power supply VPRN voltage is 0V.
When printer is started working, POS control circuit outputs a control signal to control signal input PRT-PWR, makes its level become high level from low level.When control signal input PRT-PWR becomes high level, triode Q1 conducting, and then make metal-oxide-semiconductor Q2 conducting.Now owing to opening Cushioning Design, power input VCC first charges to buffer capacitor C3, and after buffer capacitor C3 charging complete, the voltage of power output end VPRN also slowly reaches 8.5V.And then achieve printer power supply output VPRN and delay the design of opening.
As shown in Figure 2, in the process that conventional printer power control circuit is opened at printer power supply, the voltage waveform of power input VCC there will be shake.According to measurement, in 28.8ms process electric on a printer, the voltage of the power input VCC of complete machine there will be the process first declining and rise, and power input VCC voltage first can drop to 7.08V, then rises to 8.28V.Because thermal printer is when heating printhead, there will be the situation of big current, the voltage of power output end VPRN and power supply input list now can be caused to occur identical fluctuation.
As shown in Figure 3, the present invention is with the printer power supply control circuit of delay startup.As can be seen from Figure, in power output end VPRN voltage rise process, there is not shake in complete machine power input VCC, so both can improve the stability of power supply, can ensure again when printer power supply is opened, there will not be complete machine to occur unstable situation because of power source change.Thus improve reliability and the durability of power control circuit, improve Consumer's Experience.
The present invention by increasing buffer capacitor in thermal printer power-supply system, the moment powered at printer power supply is slowly opened, reduces instantaneous pressure difference to the injury of thermal printer, reduce product repair rate, improve product reliability and durability, and then improve the user satisfaction of product.Structure of the present invention is simple, design and production cost low, there is good economic and social benefit.The present invention can be widely used in the thermal printer power-supply system of various POS.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent distortion or replacement are all included in the application's claim limited range.
Claims (7)
1., for a thermal printing electromechanical source delay startup system for POS, it is characterized in that, it comprises:
Control signal input, for receiving the control signal from POS control circuit;
Power input, is connected with switching circuit, for providing power supply signal;
Switching circuit, is connected with control signal input, power input and power output end respectively, for controlling power input out-put supply signal according to control signal to power output end;
Buffer capacitor, is connected with switching circuit respectively and power output end connects, and be provided for power output end when receiving power supply signal, output voltage slowly raises;
Power output end, for powering to thermal printer.
2. a kind of thermal printing electromechanical source delay startup system for POS according to claim 1, it is characterized in that, described buffer capacitor is electrochemical capacitor.
3. a kind of thermal printing electromechanical source delay startup system for POS according to claim 2, it is characterized in that, the capacity of described electrochemical capacitor is 220uF.
4. a kind of thermal printing electromechanical source delay startup system for POS according to any one of claims 1 to 3, it is characterized in that, described switching circuit comprises triode and metal-oxide-semiconductor, the base stage of described triode is connected to control signal input by the second resistance and the first resistance successively, the base stage of described triode is by the 3rd grounding through resistance, the grounded emitter of described triode, the collector electrode of described triode is connected to the grid of metal-oxide-semiconductor successively by the 4th resistance and the 5th resistance, the grid of described metal-oxide-semiconductor is connected to power input by the 6th resistance, the source electrode of described metal-oxide-semiconductor is connected to power input, the drain electrode of described metal-oxide-semiconductor is connected to power output end, described power output end is by buffer capacitor ground connection.
5. a kind of thermal printing electromechanical source delay startup system for POS according to claim 4, it is characterized in that, it also comprises control signal test side, and described control signal test side is connected to the base stage of triode by the second resistance.
6. a kind of thermal printing electromechanical source delay startup system for POS according to claim 5, it is characterized in that, described control signal input is by the first capacity earth, and described 6th resistor coupled in parallel has the second electric capacity, and described buffer capacitor is parallel with the 7th resistance.
7. a kind of thermal printing electromechanical source delay startup system for POS according to claim 1,2,3,5 or 6, it is characterized in that, described power input is direct current 8.5V input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459569.4A CN104270000A (en) | 2014-09-10 | 2014-09-10 | Thermal printer power supply soft start system for POS machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459569.4A CN104270000A (en) | 2014-09-10 | 2014-09-10 | Thermal printer power supply soft start system for POS machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104270000A true CN104270000A (en) | 2015-01-07 |
Family
ID=52161502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410459569.4A Pending CN104270000A (en) | 2014-09-10 | 2014-09-10 | Thermal printer power supply soft start system for POS machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104270000A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896958A (en) * | 2016-04-22 | 2016-08-24 | 天地（常州）自动化股份有限公司 | Power supply module for mine safety monitoring sensor |
| CN109391137A (en) * | 2018-12-12 | 2019-02-26 | 哈工大机器人（岳阳）军民融合研究院 | Inhibit the soft starting circuit and method of power surge |
| CN111759456A (en) * | 2020-07-10 | 2020-10-13 | 哈尔滨美顿医疗科技有限公司 | Balloon inflation circuit and device |
| CN112821369A (en) * | 2021-02-26 | 2021-05-18 | 浪潮(北京)电子信息产业有限公司 | Soft start circuit and FPGA system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202496005U (en) * | 2012-03-26 | 2012-10-17 | 青岛海信宽带多媒体技术有限公司 | Standby low power consumption circuit and set-top box |
| CN202949216U (en) * | 2012-11-05 | 2013-05-22 | 惠州市蓝微电子有限公司 | Power protection control circuit of point-of-sale machine |
| CN203193589U (en) * | 2013-04-27 | 2013-09-11 | 青岛海信宽带多媒体技术有限公司 | Power source control circuit and electronic product with slow-start control |
-
2014
- 2014-09-10 CN CN201410459569.4A patent/CN104270000A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202496005U (en) * | 2012-03-26 | 2012-10-17 | 青岛海信宽带多媒体技术有限公司 | Standby low power consumption circuit and set-top box |
| CN202949216U (en) * | 2012-11-05 | 2013-05-22 | 惠州市蓝微电子有限公司 | Power protection control circuit of point-of-sale machine |
| CN203193589U (en) * | 2013-04-27 | 2013-09-11 | 青岛海信宽带多媒体技术有限公司 | Power source control circuit and electronic product with slow-start control |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896958A (en) * | 2016-04-22 | 2016-08-24 | 天地（常州）自动化股份有限公司 | Power supply module for mine safety monitoring sensor |
| CN105896958B (en) * | 2016-04-22 | 2019-06-18 | 天地（常州）自动化股份有限公司 | The power module of mine safety monitoring sensor |
| CN109391137A (en) * | 2018-12-12 | 2019-02-26 | 哈工大机器人（岳阳）军民融合研究院 | Inhibit the soft starting circuit and method of power surge |
| CN111759456A (en) * | 2020-07-10 | 2020-10-13 | 哈尔滨美顿医疗科技有限公司 | Balloon inflation circuit and device |
| CN112821369A (en) * | 2021-02-26 | 2021-05-18 | 浪潮(北京)电子信息产业有限公司 | Soft start circuit and FPGA system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104270000A (en) | Thermal printer power supply soft start system for POS machine | |
| CN100561813C (en) | Method for restraining late-class circuit hot swap impact current and buffering asynchronous start circuit thereof | |
| CN204205549U (en) | Overvoltage protection | |
| WO2019100767A1 (en) | Bus short-circuit detection method, circuit, storage medium and processor | |
| CN103577223A (en) | Micro control unit (MCU) startup mode selecting circuit and MCU code updating method based on circuit | |
| CN105591356A (en) | Overvoltage and undervoltage protection circuit | |
| CN202495920U (en) | Reset circuit and set-top box having the circuit | |
| CN201780549U (en) | Multi-status switch control device and system | |
| CN113541454B (en) | Switching power supply control circuit, and control method and device of switching power supply | |
| CN106033241A (en) | Interface power supply circuit | |
| CN102955550B (en) | A kind of rack-mounted server system | |
| CN104181380A (en) | Light load current detection system | |
| CN203164864U (en) | Video card timing-sequence power-on control circuit compatible with various ATX (advanced technology extended) power sources | |
| CN103731945A (en) | Controlling method and controlling circuit for preventing electromagnetic heating device from stopping oscillation | |
| CN103956297A (en) | Large current contactor control circuit of low-speed electric vehicle | |
| US20140339921A1 (en) | Light Load Current Detection System | |
| CN103812200A (en) | Charging chip, charging system and electronic equipment | |
| CN201781412U (en) | Direct current power supply circuit | |
| CN204205932U (en) | Anti-high voltage surge soft starting circuit | |
| CN201066484Y (en) | Energy-saving peripheral | |
| CN203644016U (en) | MCU (Micro Control Unit) start mode selecting circuit | |
| CN102968068A (en) | Control circuit capable of achieving energy-saving working state | |
| CN113555863A (en) | Direct current power supply circuit, and control method and device for direct current power supply circuit | |
| CN208190625U (en) | The control system of electric appliance and touch key-press | |
| CN202068549U (en) | Integral power-on and power-off mute control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |