TI bq2416x雙輸入2.5A鋰電池充電解方案

1、ti bq2416x雙輸入2.5a鋰電池充電解方案ti公司的bq24160/ bq24161/ bq24163/ bq24168是高度集成的單個鋰電池充電器和系統(tǒng)功率通路管理器件,充電高達(dá)2.5a,輸入額度20v,輸入6.5v,主要用在手持設(shè)備,手持媒體播放器,手提設(shè)備,上網(wǎng)本和手提上網(wǎng)設(shè)備(pid).本文介紹了bq2416x主要特性,方框圖, 應(yīng)用以及bq24160/161/163/168評估模塊主要特性,應(yīng)用,材料清單和布局圖.2.5a, dual-input, single cell switchmode li-ion battery charger with power path ma

2、nagement and i2c interfacethe bq24160/ bq24161/ bq24163/ bq24168 are highly integrated single cell li-ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. the single cell charger has dual inputs which allow opera

3、tion from either a usb port or higher-power input supply (i.e., ac adapter or wireless charging input) for a versatile solution. the two inputs are fully isolated from each other and are easily selectable using the i2c interface.the power path management feature allows the bq2416x to power the syste

4、m from a high-efficiency dc-to-dc converter while simultaneously and independently charging the battery. the charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit.this allows for proper charge termination

5、and timer operation. under normal battery charging conditions, the system voltage is approximately equal to the battery voltage, however if the battery is deeply discharged, the system voltage does not drop below 3.5v. this minimum system voltage support enables the system to run with a defective or

6、 absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. the power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. this enables the use o

7、f a smaller adapter. the 2.5a input current capability allows for gsm phone calls as soon as the adapter is plugged in regardless of the battery voltage. the charge parameters are programmable using the i2c interface.the battery is charged in three phases: precharge, fast-charge constant current and

8、 constant voltage. in all charge phases, an internal control loop monitors the ic junction temperature and reduces the charge current if the internal temperature threshold is exceeded. additionally, a voltage-based battery pack thermistor monitoring input (ts) is included that monitors battery tempe

9、rature for safe charging. the ts function for bq24160, bq24163 and bq24168 is jeita compatible.bq2416x主要特性:2 high-efficiency switch mode charger with separate power path control make a gsm call with a deeply discharged battery or no battery instantly start up system from a deeply discharged battery

10、or no batterydual input chargerhighly integrated battery n-channel controller for power path management 20 v input rating, with overvoltage protection (ovp) 6.5 v for usb input 10.5 v for in input (bq24160/1/3) 6.5 v for in input (bq24168) integrated fets for up to 2.5a charge rate up to 2.5 a from

11、in input (input current limit) up to 1.5 a from usb input (input current limit)safe and accurate battery management functions 0.5% battery regulation accuracy 10% charge current accuracycharge parameters programmed using i2c interface charge voltage, current, termination threshold, input current limit, vindpm thresholdvoltage based, ntc monitoring input jeita compatible (bq24160/3/8)thermal regulation protection for output current controllow battery leakage current, bat short-circuit protectionsoft-start feature to reduce inrush currentthermal shutdown and protectionavailable i