Abstract: The single cell Lithium-ion (Li-ion) battery charger that does not dissipate power (no heat) can also use a low cost linear AC adapter. This application note discusses how to design a simple and low-cost Li-ion charger. ...

Abstract: Techniques are described for minimizing power dissipation in linear battery chargers. Beginning with a stable wall-cube switching power source, methods are described to limit the dissipation in the linear charging circuit. Circui...

Abstract: A portable wireless contact manager called Spotme was designed by the Swedish company Shockfish SA. Spotme was powered by a 4.2V Li+ rechargeable battery. However, the internal communicator circuitry requires four different volta...

Abstract: Notebook computers increasingly require complex battery charging algorithms and systems. This article provides information and background on lithium-ion (Li+), nickel-cadmium (NiCd), and nickel-metal-hydride (NiMH) batteries and ...

Abstract: There are three methods to charging Li+ batteries: switch-mode, linear and pulse. Each method has its advantages and disadvantages. Switch-mode charging minimizes power dissipation over a wide range of AC adapter voltages, but co...

Proper Layout and Component Selection Controls EMI Abstract: Understanding the physics of voltage regulator topologies is important in designing power systems for EMI and EMC compliance. In particular, the physical princi...

Abstract: A portable device using the circuit of Figure 1 derives power from the USB bus. The MAX1811 uses USB power charges a lithium-ion (Li+) battery at, USB compatible, 100mA or 500mA rates. Battery power is then stepped up with the MA...

Abstract: A USB interface is capable of charging a portable device while transferring data. But for high-capacity batteries, the limited output current of USB hosts and hubs greatly extends the charging time. Powered USB hubs and USB hosts...

摘要：DS2711和DS2712標(biāo)準(zhǔn)NiMH電池充電器(專為1節(jié)或2節(jié)AA或AAA NiMH“標(biāo)準(zhǔn)”電池設(shè)計(jì))能夠檢測原電池(一次電池，不可充電電池)，避免對其充電。本應(yīng)用筆記介紹了各種來自不同廠商的電...

摘要：本文概要介紹了電池充電方式和現(xiàn)代電池技術(shù)，以使讀者能更好的了解便攜設(shè)備中使用的電池。本文對鎳鎘(NiCd)電池，鎳氫(NiMH)電池和鋰離子(Li+)電池的化學(xué)性質(zhì)進(jìn)行了描述，...

Abstract: Adding watchdog protection to the charger-input circuitry of a mobile phone guards against damage when the baseband processor stalls or ceases software execution. Mobile-phone batteries are usually charged throu...

摘要：USB作為低功耗電子產(chǎn)品(大多數(shù)為電池供電產(chǎn)品)的電源提供了越來越多的應(yīng)用機(jī)會，無處不在的USB也為充電器設(shè)計(jì)提供了更多機(jī)會和更大的挑戰(zhàn)。本文介紹了電池充電器與USB電...

Abstract: This application note describes how to improve full-scale current-sense and charge-termination accuracy of the MAX1737 lithium-ion (Li+) battery charger. The MAX1737 current-sense is more accurate than stated in the data sheet, b...

摘要：DS2714獨(dú)立式NiMH電池充電器的數(shù)據(jù)資料中提供了一個(gè)使用pnp晶體管的應(yīng)用電路，利用pnp晶體管對充電電流進(jìn)行開、關(guān)控制。這種方式可能存在某些問題，因?yàn)槌潆娍刂埔_的電...

摘要：本應(yīng)用筆記簡單介紹了鎳鎘(NiCd)、鎳氫(NiMH)和鋰離子(Li-Ion，Li+)可充電電池, 討論它們的性能，并說明在不需要微控制器的情況下如何構(gòu)建單機(jī)結(jié)構(gòu)，安全、快速地為鎳氫和鋰...

Abstract: Due to the high energy/power density, in relation to the weight and volume of Lithium-ion (Li+) battery technology, there are some lingering safety concerns when charging and discharging the batteries. Although an already mature ...

摘要：MAX8671X電源管理IC (PMIC)能夠?yàn)楸銛y系統(tǒng)設(shè)計(jì)提供鋰電池充電及電源穩(wěn)壓，該器件可利用USB端口或外部AC-DC電源適配器作為輸入電源為鋰離子(Li+)、鋰聚合物(Li-Poly)電池充電。PMIC...

摘要：DS2715電池充電器的開關(guān)速度因充電模式、電感選擇和電池電壓而有所不同。某些情況下，需要了解各種條件下的開關(guān)速度,以解決噪聲靈敏度、峰值充電電流和電感選擇限制等...

摘要：開關(guān)模式下，DS2712電池充電器的開關(guān)速度因電感選擇、充電電流和電池電壓而有所不同。某些情況下，需要了解各種條件下的開關(guān)速度，以解決噪聲靈敏度、峰值充電電流和...

摘要：由于Li+電池充電器的充電過程會持續(xù)一個(gè)小時(shí)甚至更長的時(shí)間，利用實(shí)際負(fù)載(即電池)對充電器進(jìn)行測試將非常耗時(shí)。本應(yīng)用筆記介紹了一種簡單的Li+電池仿真方法，與采用實(shí)...