CN202276179U - Tablet computer charging power supply system - Google Patents
Tablet computer charging power supply system Download PDFInfo
- Publication number
- CN202276179U CN202276179U CN2011203874771U CN201120387477U CN202276179U CN 202276179 U CN202276179 U CN 202276179U CN 2011203874771 U CN2011203874771 U CN 2011203874771U CN 201120387477 U CN201120387477 U CN 201120387477U CN 202276179 U CN202276179 U CN 202276179U
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- integrated circuit
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Abstract
The utility model discloses a tablet computer charging/power supply system which comprises an alternating current adapter, a USB interface, a charging integrated circuit, a battery, a direct current limit integrated circuit, a first resistor, a second resistor, a metal oxide semiconductor field-effect transistor, a first diode, a second diode and a third diode, wherein the first diode and the first resistor are connected with the alternating current adapter; the first resistor and the second resistor are connected in series; the metal oxide semiconductor field-effect transistor is connected with the first resistor, the second resistor and the second diode in parallel; the battery is connected with the metal oxide semiconductor field-effect transistor, the second diode and the charging integrated circuit; the third diode is connected between the charging integrated circuit and the direct current limit integrated circuit; and the direct current limit integrated circuit is connected with the USB interface. The utility model can simultaneously supply power to the battery and charge the battery, can protect the battery, and can not shorten the service life of the battery.
Description
Technical field
The utility model relates to a kind of electric power system, particularly a kind of panel computer charging electric power system.
Background technology
After the iPAD of Apple was market-oriented, the notion of panel computer is extensively promoted and many communication terminals of audient company pursues, and many companies have all released panel computer in succession.And panel computer has multi-functional and large-sized monitor, also is indispensable, to such an extent as to the index that the battery flying power has been the panel computer performance to be considered.So, in panel computer, see high capacity cells such as 4000MAH through regular meeting, some producer also uses two batteries, is used for increasing battery capacity, increases cruising time.Though capacity increases, the time increases, and also becomes a new problem to battery charge with to the power supply of system.Present numerous Chevron Research Company (CRC) is power management and the charging circuit that application scheme company is provided.
Present electric power system is as shown in Figure 1; Present electric power system can be supported AC adapter (AC adapter) and two kinds of charge modes of USB interface; And this is managed through a charging integrated circuit (charge IC) because be; The charging integrated metal-oxide half field effect transistor of IC interior (MOSFET pipe) is because the overcurrent of this metal-oxide half field effect transistor is big inadequately, so be the dynamic charging method of using always.Promptly be not fully system to be charged and supply power after AC adapter inserts, when the summation of the power supply of system and battery charge is higher than the AC adapter power supply capacity, will reduce charging current perhaps cut-out charge, be used to provide enough system's power consumptions.This system is reasonable application at the hand-held product of mobile phone and so on, and in panel computer, just is easy to cause the charging interval long, and perhaps for a long time battery fills the situation of insatiable hunger.For example the user is being the power consumption that needs 1500mA with a system, and the charging integrated circuit provides the electric current of 2000mA altogether, only stays 500mA to charge the battery, and needs at least 8 hours just can fill full.And when charging with USB interface, battery will cause battery to use up the situation of shutdown also in discharge always in fact.
The utility model content
The utility model technical problem to be solved provides a kind of panel computer charging electric power system, and it can be supplied power simultaneously and to battery charge, protect battery, the useful life that can not damage battery.
For solveing the technical problem; The utility model provides a kind of panel computer charging electric power system; It is characterized in that; It comprises AC adapter, USB interface, charging integrated circuit, battery, direct current limit ic, first resistance, second resistance, metal-oxide half field effect transistor, first diode, second diode, the 3rd diode, and first diode, first resistance are connected with AC adapter, first resistance, the series connection of second resistance; Metal-oxide half field effect transistor and first resistance, second resistance, second diode are parallelly connected; Battery is connected with metal-oxide half field effect transistor, second diode, charging integrated circuit, and the 3rd diode is connected between charging integrated circuit and the direct current limit ic, and the direct current limit ic is connected with USB interface.
The positive progressive effect of the utility model is: the utility model can be supplied power simultaneously and to battery charge, protected battery, the useful life that can not damage battery.
Description of drawings
Fig. 1 is the theory diagram of present electric power system.
Fig. 2 is the theory diagram of the utility model panel computer charging electric power system.
Embodiment
Lift a preferred embodiment below, and combine accompanying drawing to come the clearer the utility model of intactly explaining.
As shown in Figure 2; The utility model panel computer charging electric power system comprises AC adapter, USB interface, charging integrated circuit, battery, direct current limit ic, first resistance R 1, second resistance R 2, metal-oxide half field effect transistor Q1, the first diode D1, the second diode D2, the 3rd diode D3; The first diode D1, first resistance R 1 are connected with AC adapter; First resistance R 1,2 series connection of second resistance R; Metal-oxide half field effect transistor Q1 and first resistance R 1, second resistance R 2, the second diode D2 are parallelly connected; Battery is connected with metal-oxide half field effect transistor Q1, the second diode D2, charging integrated circuit, and the 3rd diode D3 is connected between charging integrated circuit and the direct current limit ic, and the direct current limit ic is connected with USB interface.
The operation principle of the utility model panel computer charging electric power system is following: when AC adapter is connected outside AC power; The DC power supply that AC adapter produces is through first resistance R 1, second resistance R, 2 dividing potential drops; Make metal-oxide half field effect transistor Q1 from cut-off state; Battery is no longer to using electricity system power supply, the DC power supply that the power supply of using electricity system produces from AC adapter.And this moment, the charging integrated circuit is started working, with the charging current set to battery charge; When AC adapter breaks off with outside AC power, metal-oxide half field effect transistor Q1 saturation conduction, battery is supplied power to using electricity system.For prevent moment that AC adapter switches on and off because of using electricity system (panel computer) power consumption; And do not supply with; Cause the using electricity system shutdown perhaps to be restarted, the utility model is held the parallelly connected second diode D2 at metal-oxide half field effect transistor Q1, is used to provide the quick afterflow of moment.When USB interface was connected outside AC power, the direct current limit ic was opened, and charged the battery through charging integrated circuit, the 3rd diode D3, and battery is no longer to using electricity system power supply, the DC power supply that the power supply of using electricity system produces from USB interface.When AC adapter, USB interface were all connected outside AC power, the direct current limit ic was closed, and only keep AC adapter and supply power to using electricity system, and to battery charge.Connect the second diode D2 between battery and the using electricity system, the AC power that prevents two outsides is used for protecting battery to battery charge, can not damage the useful life of battery.The utility model is suitable for the bigger mobile terminal devices of power consumption such as panel computer.
Though more than described the embodiment of the utility model; But those skilled in the art is to be understood that; These only illustrate, and under the prerequisite of principle that does not deviate from the utility model and essence, can make numerous variations or modification to these execution modes.Therefore, the protection range of the utility model is limited appended claims.
Claims (1)
1. panel computer charging electric power system; It is characterized in that; It comprises AC adapter, USB interface, charging integrated circuit, battery, direct current limit ic, first resistance, second resistance, metal-oxide half field effect transistor, first diode, second diode, the 3rd diode; First diode, first resistance are connected with AC adapter; The series connection of first resistance, second resistance, metal-oxide half field effect transistor and first resistance, second resistance, second diode are parallelly connected, and battery is connected with metal-oxide half field effect transistor, second diode, the integrated circuit that charges; The 3rd diode is connected between charging integrated circuit and the direct current limit ic, and the direct current limit ic is connected with USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203874771U CN202276179U (en) | 2011-10-12 | 2011-10-12 | Tablet computer charging power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203874771U CN202276179U (en) | 2011-10-12 | 2011-10-12 | Tablet computer charging power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202276179U true CN202276179U (en) | 2012-06-13 |
Family
ID=46196516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203874771U Expired - Fee Related CN202276179U (en) | 2011-10-12 | 2011-10-12 | Tablet computer charging power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202276179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701156A (en) * | 2013-08-23 | 2014-04-02 | 赛龙通信技术（深圳）有限公司 | Charge device and electronic equipment |
-
2011
- 2011-10-12 CN CN2011203874771U patent/CN202276179U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701156A (en) * | 2013-08-23 | 2014-04-02 | 赛龙通信技术（深圳）有限公司 | Charge device and electronic equipment |
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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 |
Granted publication date: 20120613 Termination date: 20181012 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |