基于單片機的智能手機充電器的設(shè)計-免費閱讀
【正文】 從我們對理論和實驗結(jié)果的觀察，我們得出的結(jié)論是，這種雙電池的設(shè)計有能力延長這樣一個微型電腦平均運行時間的兩倍。此外，在單片機系統(tǒng)的雙充電電池的可行性估計已給出。盡管當前的MC 硅太陽能電池發(fā)電效率還不夠高，％％。因此，太陽能電池作為通過用雙充電電池為微型計算機8051系統(tǒng)充電的充電電池在不久的將來是可行的。這種靈活的效率的改進，就是現(xiàn)在這些重要的設(shè)備，這對持續(xù)增長和移動特征設(shè)置擴展，手持產(chǎn)品擴展是至關(guān)重要的。如Intersil的公司是新一代充電器芯片開發(fā)的領(lǐng)頭羊。目前已開發(fā)出發(fā)達的電池充電器的集成電路使用一個開關(guān)式的充電器供應(yīng)高的充電電流以最小的熱量影響到系統(tǒng)使，然后在低電流充電模式下轉(zhuǎn)換成為線性充電器，以減少噪音。此外，一些早期的幾代開關(guān)模式的設(shè)備需要一些外部元件。線性充電器有一段較長的歷史。通過優(yōu)化電源消耗來延長電池的壽命是掌上型電源管理的驅(qū)動力?！秶鴮W(xué)智慧、易經(jīng)》46套講座《人力資源學(xué)院》56套講座+27123份資料《各階段員工培訓(xùn)學(xué)院》77套講座+ 324份資料《員工管理企業(yè)學(xué)院》67套講座+ 8720份資料《工廠生產(chǎn)管理學(xué)院》52套講座+ 13920份資料《財務(wù)管理學(xué)院》53套講座+ 17945份資料《銷售經(jīng)理學(xué)院》56套講座+ 14350份資料《銷售人員培訓(xùn)學(xué)院》72套講座+ 4879份資料Improvements in Battery Charger ICs Keep Pace with Rapid Increases in Mobile Handset CapabilitiesIn the era of global wireless connectivity, almost nothing is more important than keeping a smart phone or mobile Internet device charged. Expanding features on the constantly improving portable and handheld device create a major challenge for designers of battery charger ICs. High resolution screens and larger memories bine with new capabilities to tax the battery, requiring battery charger technology that is not only more efficient but also capable of managing power distribution. Optimizing power consumption to prolong battery life has always been a driving force in handheld power management. However what is changing are the efficiency expectations for charging handheld devices when they are plugged into the wall. The latest generations of device designs are using highefficiency switching chargers in place of traditional linear chargers. Customers today continue to demand shorter charge cycles when charging their battery. Beside higher efficiency with respect to the conventional linear chargers, one of the great advantages of using switching chargers solution is the capability to boost the charge current from what supplied by the source. This is especially important when powering off of a USB port where the current available might be limited to less than 500mA. Higher charge currents equate to shorter charge cycles thus satisfying customer expectations.There are two kinds of battery chargers used in most handhelds now – linear chargers and switching devices. Linear chargers have a longer history. They have typically provided a relatively efficient, simple way to charge portable devices, creating minimal noise without many external ponents. But as portable devices bee more plex and add layers of new features, they need higher battery capacity. Linear chargers present liabilities due to power dissipation, which bee clear if a user wants to charge a device while using at the same time. The heat generated while simultaneously using and charging can damage the system or battery. Not a good oute. The alternative is a switching device, or switch mode battery charger IC, that can deliver higher current levels to a battery while requiring as little power as possible. Historically, there have been some noise issues with these kinds of ICs. In addition, some early generations of switch mode devices have required several externa
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