CN201690269U - Handheld meter terminal power supply control circuit - Google Patents
Handheld meter terminal power supply control circuit Download PDFInfo
- Publication number
- CN201690269U CN201690269U CN201020175221XU CN201020175221U CN201690269U CN 201690269 U CN201690269 U CN 201690269U CN 201020175221X U CN201020175221X U CN 201020175221XU CN 201020175221 U CN201020175221 U CN 201020175221U CN 201690269 U CN201690269 U CN 201690269U
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- Prior art keywords
- power supply
- voltage
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- circuit
- converter
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- 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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The utility model relates to a power supply control circuit, which discloses a handheld meter terminal power supply control circuit, which comprises a normal mode power supply circuit and a sleep mode power supply circuit, wherein an electrical switch and a voltage converter are added in the normal mode power supply circuit, a CPU and various function modules are connected with the voltage converter through the electrical switch, than are connected with an original circuit through the voltage converter, and function modules which are not needed are controlled and selected to be closed by the CPU. The voltage converter is added in an original sleep mode power supply circuit, and is controlled by the CPU to lead a system to be in a sleep state. The handheld meter terminal power supply control circuit adds the electrical switch and the voltage converter in an original circuit, thereby leading the power consumption of the normal mode power supply circuit and the sleep mode power supply circuit to be reduced, and achieving the purpose of low power consumption.
Description
Technical field
The utility model relates to a kind of power control circuit, a kind of specifically hand-hold meter reading terminal power control circuit.
Background technology
Because micropower radio meter register pattern has the wiring of need not, advantages such as simple installation, industry extensively adopts checking meter.Along with people to the improving constantly of embedded radio hand-hold meter reading terminal functional requirement, the power consumption of hand-hold meter reading terminal is also constantly increasing.Conflictingly with it be, the size of hand-hold meter reading terminal is but constantly being dwindled, and the operating time makes embedded hand-hold meter reading terminal power-supply system management face the increasing pressure also in continuous prolongation.How to design stable performance, meter reading terminal low in energy consumption and become one of difficult point of embedded hand-hold meter reading terminal exploitation.
Summary of the invention
Technical problem to be solved in the utility model is: the shortcoming at above prior art exists, a kind of hand-hold meter reading terminal power control circuit is proposed, and can selectively close unwanted functional module, thereby reach the purpose of low-power consumption.
The technical scheme that the utility model solves above technical problem is:
The hand-hold meter reading terminal power control circuit comprises normal mode power supply circuits and park mode power supply circuits; The normal mode power supply circuits comprise power supply input circuit, charging circuit and boot-strap circuit, and CPU, USB and each functional module are all joined with boot-strap circuit; The park mode power supply circuits comprise power supply input circuit, and CPU and each functional module are all joined with power supply input circuit; The normal mode power supply circuits also comprise the LDO converter of the LDO converter (buck converter) of an output 1.8V voltage, an output 3.3V voltage and the BOOST converter (booster converter) of an output 5V voltage, CPU, USB pass through an electronic switch with each functional module and link to each other with the LDO converter of output 3.3V voltage, the LDO converter of output 3.3V voltage links to each other with power supply input circuit with boot-strap circuit, CPU also links to each other with the LDO converter of output 1.8V voltage separately, and the LDO converter of output 1.8V voltage links to each other with power supply input circuit with boot-strap circuit.
Like this, in original normal mode power supply circuits, electronic switch and voltage changer have been increased, CPU and each functional module connect voltage changer by electronic switch, connect original circuit by voltage changer again, selectively close unwanted functional module by CPU control, thereby make the normal mode power supply circuits reduce the power consumption of wireless module.
As the further technical scheme that limits of the utility model, the park mode power supply circuits also comprise the LDO converter of an output 1.8V voltage and the LDO converter of an output 3.3V voltage, CPU links to each other with the LDO converter of output 3.3V voltage with each functional module, the LDO converter of output 3.3V voltage links to each other with power supply input circuit, CPU also links to each other with the LDO converter of output 1.8V voltage separately, and the LDO converter of output 1.8V voltage links to each other with power supply input circuit.Like this, in original park mode power supply circuits, increased voltage changer, made system be in resting state, thereby park mode power supply circuits power consumption is reduced by CPU control.
This shows, the increase electronic switch and the voltage changer in original circuit of the utility model science, thus the power consumption of normal mode power supply circuits and park mode power supply circuits all is reduced, reach the purpose of low-power consumption.
As the further technical scheme that limits of the utility model, the normal mode power supply circuits also comprise the BOOST converter of an output 5V voltage, USB links to each other with the BOOST converter of output 5V voltage separately, and the BOOST converter of output 5V voltage links to each other with power supply input circuit with boot-strap circuit.CPU is the ARM7TDMI core processor LPC2214 of NXP company.
Description of drawings
Fig. 1 is the circuit diagram of the utility model normal mode power supply circuits.
Fig. 2 is the circuit diagram of the utility model park mode power supply circuits.
Embodiment
Embodiment one
Present embodiment is a kind of hand-hold meter reading terminal power control circuit, comprises normal mode power supply circuits and park mode power supply circuits.The normal mode power supply circuits as shown in Figure 1, comprise power supply input circuit, charging circuit, Ni-MH battery group and boot-strap circuit, the LDO converter that also comprises an output 1.8V voltage, the BOOST converter of the LDO converter of an output 3.3V voltage and an output 5V voltage, CPU, USB passes through an electronic switch with each functional module and links to each other with the LDO converter of output 3.3V voltage, the LDO converter of output 3.3V voltage links to each other with power supply input circuit with boot-strap circuit by its power converting circuit, CPU also links to each other with the LDO converter of output 1.8V voltage separately, and the LDO converter of output 1.8V voltage links to each other with power supply input circuit with boot-strap circuit by its power converting circuit.The normal mode power supply circuits also comprise the BOOST converter of an output 5V voltage, and USB links to each other with the BOOST converter of output 5V voltage separately, and the BOOST converter of output 5V voltage links to each other with power supply input circuit with boot-strap circuit by its power converting circuit.
CPU adopts flush bonding processor to constitute usually, adopts the ARM7TDMI core processor LPC2214 of NXP company to constitute.LPC2214 is the high-performance embedded microprocessor that designs for all kinds of handheld terminals specially, and dominant frequency can reach 60MHz, has characteristics such as peripheral interface is abundant, volume is little, low in energy consumption.LPC2214 has 4 kinds of mode of operations: normal mode, low-speed mode, idle pulley, sleep pattern.Can change mutually between 4 kinds of patterns, difference mainly is the difference of processor working frequency, operating voltage.
Under normal operation mode, CPU and peripheral interface circuit are taked time sharing power supply as required, reach the purpose of conserve energy by the electronic switch of control peripheral control unit.Peripheral components mainly comprises FLASH, SRAM, wireless module, LCD, keyboard etc.The Peripheral Interface of hand-hold meter reading terminal is abundant, but these interfaces are not necessarily all used simultaneously.According to the scene of the hand-hold meter reading terminal business operation flow process of checking meter, when when not needing to carry out wireless telecommunications,, the power supply of wireless communication module is cut off by CPU control, only allow peripheral hardwares power supplies such as part peripheral hardware such as LCD, SRAM, keyboard.After in the meter reader application program, starting the radio meter register order, again the wireless module power supply is enabled, communication is closed the wireless module power supply after finishing at once.Simultaneously, when wireless module sends, receiving circuit cuts out; During reception, transtation mission circuit cuts out, can further reduce the power consumption of wireless module.When not needing to carry out transfer of data such as RS232, RS485, USB, circuit supplies such as RS232, RS485, USB are cut off.
The park mode power supply circuits as shown in Figure 2, comprise power supply input circuit, also comprise the LDO converter of an output 1.8V voltage and the LDO converter of an output 3.3V voltage, CPU links to each other with the LDO converter of output 3.3V voltage with each functional module, the LDO converter of output 3.3V voltage links to each other with power supply input circuit, CPU also links to each other with the LDO converter of output 1.8V voltage separately, and the LDO converter of output 1.8V voltage links to each other with power supply input circuit.
The input power supply of battery is behind the LDO converter, and one tunnel output 3.3V supplies with ports such as CPU IO, RTC and SRAM; Another road is by LDO converter output 1.8V, and CPU internal energy administration module is powered during for dormancy.At this moment, the power supply of other peripheral hardware is all cut off.Under the park mode, the main Time-out strategy that adopts, after system finishes all tasks, if the duration surpasses a certain threshold value (this time interval can be set by the timing module that system provides), power management module is converted to resting state with system, waken system again when having the new task request to arrive is carried out new task.At park mode, LPC2214 is in the SLEEP pattern, and inner PLL closes fully, so power consumption is very low.Before CPU entered park mode, it was write timing in the warning register of RTC inside earlier, when RTC timing alarm time arrives, the keyboard message trigger was arranged perhaps, and then system is waken up, and reenters normal operation mode.
The utility model can also have other execution mode, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the claimed scope of the utility model.
Claims (4)
1. the hand-hold meter reading terminal power control circuit comprises normal mode power supply circuits and park mode power supply circuits; Described normal mode power supply circuits comprise power supply input circuit, charging circuit and boot-strap circuit, and CPU, USB and each functional module are all joined with boot-strap circuit; Described park mode power supply circuits comprise power supply input circuit, and CPU and each functional module are all joined with power supply input circuit; It is characterized in that: described normal mode power supply circuits also comprise the LDO converter of an output 1.8V voltage, the BOOST converter of the LDO converter of an output 3.3V voltage and an output 5V voltage, described CPU, USB passes through an electronic switch with each functional module and links to each other with the LDO converter of described output 3.3V voltage, the LDO converter of described output 3.3V voltage links to each other with power supply input circuit with described boot-strap circuit, described CPU also links to each other with the LDO converter of described output 1.8V voltage separately, and the LDO converter of described output 1.8V voltage links to each other with power supply input circuit with described boot-strap circuit.
2. hand-hold meter reading terminal power control circuit as claimed in claim 1, it is characterized in that: described park mode power supply circuits also comprise the LDO converter of an output 1.8V voltage and the LDO converter of an output 3.3V voltage, described CPU links to each other with the LDO converter of described output 3.3V voltage with each functional module, the LDO converter of described output 3.3V voltage links to each other with described power supply input circuit, described CPU also links to each other with the LDO converter of described output 1.8V voltage separately, and the LDO converter of described output 1.8V voltage links to each other with described power supply input circuit.
3. hand-hold meter reading terminal power control circuit as claimed in claim 1, it is characterized in that: described normal mode power supply circuits also comprise the BOOST converter of an output 5V voltage, described USB links to each other with the BOOST converter of described output 5V voltage separately, and the BOOST converter of described output 5V voltage links to each other with power supply input circuit with described boot-strap circuit.
4. as claim 1 or 2 or 3 described hand-hold meter reading terminal power control circuits, it is characterized in that: described CPU is the ARM7TDMI core processor LPC2214 of NXP company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020175221XU CN201690269U (en) | 2010-04-29 | 2010-04-29 | Handheld meter terminal power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020175221XU CN201690269U (en) | 2010-04-29 | 2010-04-29 | Handheld meter terminal power supply control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690269U true CN201690269U (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201020175221XU Expired - Fee Related CN201690269U (en) | 2010-04-29 | 2010-04-29 | Handheld meter terminal power supply control circuit |
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| CN (1) | CN201690269U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968905A (en) * | 2010-09-09 | 2011-02-09 | 扬州恒信仪表有限公司 | Portable data terminal |
| CN107168156A (en) * | 2017-05-16 | 2017-09-15 | 深圳市美好创亿医疗科技有限公司 | Reduce the control circuit and control method of electronic product power consumption |
| CN108469860A (en) * | 2018-05-07 | 2018-08-31 | 武汉新芯集成电路制造有限公司 | Low pressure difference linear voltage regulator module |
| CN109448347A (en) * | 2018-10-16 | 2019-03-08 | 江苏万邦微电子有限公司 | A kind of security device based on low-power consumption |
| CN114762474A (en) * | 2020-12-30 | 2022-07-19 | 南京泉峰科技有限公司 | Self-driven device and electronic system thereof |
-
2010
- 2010-04-29 CN CN201020175221XU patent/CN201690269U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968905A (en) * | 2010-09-09 | 2011-02-09 | 扬州恒信仪表有限公司 | Portable data terminal |
| CN101968905B (en) * | 2010-09-09 | 2012-12-12 | 扬州恒信仪表有限公司 | Portable data terminal |
| CN107168156A (en) * | 2017-05-16 | 2017-09-15 | 深圳市美好创亿医疗科技有限公司 | Reduce the control circuit and control method of electronic product power consumption |
| CN108469860A (en) * | 2018-05-07 | 2018-08-31 | 武汉新芯集成电路制造有限公司 | Low pressure difference linear voltage regulator module |
| CN109448347A (en) * | 2018-10-16 | 2019-03-08 | 江苏万邦微电子有限公司 | A kind of security device based on low-power consumption |
| CN114762474A (en) * | 2020-12-30 | 2022-07-19 | 南京泉峰科技有限公司 | Self-driven device and electronic system thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20180429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |