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TIbq2416x双输入2.5A锂电池充电解计划

发稿时间:2018-12-17 编辑:admin

TIbq2416x双输入2.5A锂电池充电解计划

TI公司的bq24160/ bq24161/ bq24163/ bq24168是高度集成的单个锂电池充电器和体系功率通路办理器材,充电电流高达2.5A,输入电压额度20V,USB输入6.5V,首要用在手持设备,手持媒体播放器,手提设备,上网本和手提上网设备(PID).本文介绍了bq2416x首要特性,方框图, 使用电路图以及bq24160/161/163/168评价模块首要特性,使用电路,资料清单和PCB布局图.

2.5A, Dual-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Management and I2C Interface

The 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 operation 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 system 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 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 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 of 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 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 temperature for safe charging. The TS function for bq24160, bq24163 and bq24168 is JEITA compatible.

bq2416x首要特性:

2• High-Efficiency Switch Mode Charger with Separate Power Path Control

– Make a GSM Call with a Deeply Discharged Battery or No Battery

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