CN103001285A - Miniature direct-current power management module - Google Patents
Miniature direct-current power management module Download PDFInfo
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- CN103001285A CN103001285A CN 201210453153 CN201210453153A CN103001285A CN 103001285 A CN103001285 A CN 103001285A CN 201210453153 CN201210453153 CN 201210453153 CN 201210453153 A CN201210453153 A CN 201210453153A CN 103001285 A CN103001285 A CN 103001285A
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- power management
- charging
- circuit
- management module
- current
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Abstract
The invention discloses a miniature direct-current power management module, and relates to a management control circuit of a small direct-current rechargeable battery. The miniature direct-current power management module comprises a charging self-regulating circuit, a charging current output circuit and a charging state indicating circuit, and an output end of a direct-current voltage-stabilized source is directly connected with a positive input power pin of a power management IC (integrated circuit). The miniature direct-current power management module has the advantages that the miniature direct-current power management module is scientific and reasonable in design, simple in structure and low in cost; an LED on-off charging prompting effect and charging current monitoring, undervoltage self-locking and automatic recharging functions are realized by the aid of the power control IC; battery charging management is effectively carried out, and the service life of a battery is prolonged; and requirement of sustainable development of China on environmental protection is met.
Description
Technical field
Embodiments of the invention relate to electric power management circuit, particularly a kind of battery management control circuit of small-sized DC charging.
Background technology
Development along with current electronic technology, one of the requisite electronic equipment in people's daily life such as Mobile portable electronic equipment such as mobile phone or MP3, MP4, MP5, and along with the function of present Mobile portable electronic product is constantly improved increase, screen size also increases gradually, when bringing better user to experience to people, also inevitably accelerated the electric quantity consumption of supplying cell.Therefore, in order to prolong the stand-by time of Mobile portable electronic equipment, when increasing battery capacity, be necessary that also idea manages to guarantee effective management of charging and discharging of battery, to prolong the battery Acceptable life.
Summary of the invention
The present invention be directed to the problems referred to above, aim to provide a kind of cost minisize dc power management module low, simple in structure.
Implementation of the present invention is: mainly be comprised of charging self-regulation circuit, charging current output circuit and charged state indicating circuit, and the D.C. regulated power supply output directly is connected with the positive input power pins of power management IC; Wherein:
The charged state indicating circuit is connected with green LED LED3 ' with red light emitting diodes LED3 respectively by its state indication output end pin by power management IC, and connects and composes by series resistance R2 and D.C. regulated power supply output; Charging self-regulation circuit is comprised of being connected a resistance R 4 between charging current monitoring pin and the ground power management IC, for charging current is set, is implemented in when charging under the constant-current mode, and the voltage of pin is maintained at 1V;
The charging current output circuit, external capacitor C5 between charging current output pin and ground consists of by power management IC, and being used for provides charging current and final the adjusting to determine float charge voltage to battery.
Useful technique effect of the present invention is: the present invention utilizes power supply control IC not only to realize the charge prompting of LED diode light on and off promptings, and realized charging current monitoring, under-voltage self-locking, automatically recharged function, effectively carry out battery charging management, prolong battery, meet the environment protection requirement of China's sustainable development.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
With reference to figure, the present invention mainly is comprised of charging self-regulation circuit, charging current output circuit and charged state indicating circuit, and the D.C. regulated power supply output directly is connected with the positive input power pins of power management IC.
Power management IC adopts Nanjing to open up the single-lithium-battery pond charging management chip TP4057 that little integrated circuit Co., Ltd produces in the embodiments of the invention, and its input voltage is 4 ~ 9V, and the computing formula that can regulate charging current is as follows.
The charged state indicating circuit is connected with green LED LED3 ' with red light emitting diodes LED3 respectively by its state indication output end pin by power management IC, and connects and composes by series resistance R2 and D.C. regulated power supply output; The state demonstrative definition of the light-emitting diode in the present embodiment is as shown in the table.
| Red light emitting diodes LED3 | Green LED LED3 ' | State |
| Bright | Go out | Charge |
| Go out | Bright | Finish charging |
| Go out | Go out | Line under-voltage or battery reversal connection |
Charging self-regulation circuit is reached at least 1% resistance R 4 and forms being connected a precision between charging current monitoring pin and the ground by power management IC, for charging current is set, is implemented in when charging under the constant-current mode, and the voltage of pin is maintained at 1V.
The charging current output circuit, external capacitor C5 between charging current output pin and ground consists of by power management IC, and being used for provides charging current and final the adjusting to determine float charge voltage to battery.
Power source charges management work process is: behind access battery V6 to be charged, when the voltage of battery V6 to be charged less than the setting voltage lower limit is, then power management IC will carry out precharge to battery, and electric current is for setting 1/10 of electric current.After the voltage of battery V6 to be charged reaches the setting lower voltage limit, power management IC will carry out the electric current constant current charge to battery.After the voltage of battery V6 to be charged reached capping voltage, the charging output current is reduced to set 1/10 of electric current, the beginning constant voltage charge, and expression battery first voltage charging process is finished.
After this, when power management IC monitors cell voltage V6 and is lower than the setting voltage higher limit, will again enter charging process, guarantee all the time the higher charging saturation voltage of battery.
Claims (3)
1. minisize dc power management module is characterized in that comprising: mainly be comprised of charging self-regulation circuit, charging current output circuit and charged state indicating circuit, and the D.C. regulated power supply output directly is connected with the positive input power pins of power management IC; Wherein:
The charged state indicating circuit is connected with green LED LED3 ' with red light emitting diodes LED3 respectively by its state indication output end pin by described power management IC, and connects and composes by series resistance R2 and D.C. regulated power supply output;
Charging self-regulation circuit is comprised of being connected a resistance R 4 between charging current monitoring pin and the ground described power management IC, for charging current is set, is implemented in when charging under the constant-current mode, and the voltage of pin is maintained at 1V;
The charging current output circuit, external capacitor C5 between charging current output pin and ground consists of by described power management IC, and being used for provides charging current and final the adjusting to determine float charge voltage to battery.
2. minisize dc power management module according to claim 1 is characterized in that the precision of described resistance R 4 is reached for 1% at least.
3. minisize dc power management module according to claim 1 is characterized in that described power management IC can be the TP4057 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210453153 CN103001285A (en) | 2012-11-13 | 2012-11-13 | Miniature direct-current power management module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210453153 CN103001285A (en) | 2012-11-13 | 2012-11-13 | Miniature direct-current power management module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103001285A true CN103001285A (en) | 2013-03-27 |
Family
ID=47929549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210453153 Withdrawn CN103001285A (en) | 2012-11-13 | 2012-11-13 | Miniature direct-current power management module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103001285A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326459A (en) * | 2013-07-17 | 2013-09-25 | 深圳市翌日科技有限公司 | Low-voltage direct-current power supply switchover circuit and direct-current power supply |
| CN106655431A (en) * | 2016-12-21 | 2017-05-10 | 江西佰仕通电子科技有限公司 | Charger circuit capable of automatically adjusting current |
| CN107689207A (en) * | 2017-11-03 | 2018-02-13 | 红品晶英科技（深圳）有限公司 | A kind of circuit structure that pattern displaying is carried out used in cell phone rear cover |
-
2012
- 2012-11-13 CN CN 201210453153 patent/CN103001285A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326459A (en) * | 2013-07-17 | 2013-09-25 | 深圳市翌日科技有限公司 | Low-voltage direct-current power supply switchover circuit and direct-current power supply |
| CN103326459B (en) * | 2013-07-17 | 2015-07-15 | 深圳市翌日科技有限公司 | Low-voltage direct-current power supply switchover circuit and direct-current power supply |
| CN106655431A (en) * | 2016-12-21 | 2017-05-10 | 江西佰仕通电子科技有限公司 | Charger circuit capable of automatically adjusting current |
| CN106655431B (en) * | 2016-12-21 | 2023-05-12 | 江西佰仕通电子科技有限公司 | Automatic current regulation charger circuit |
| CN107689207A (en) * | 2017-11-03 | 2018-02-13 | 红品晶英科技（深圳）有限公司 | A kind of circuit structure that pattern displaying is carried out used in cell phone rear cover |
| CN107689207B (en) * | 2017-11-03 | 2023-08-04 | 红品晶英科技（深圳）有限公司 | Circuit structure for displaying patterns on mobile phone rear cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20130327 |