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TI bq24078高电压1.5A锂电池充电解决方案

TI公司的bq2407x系列是高电压1.5A锂电池线性充电器,具有系统功率通路管理功能,工作在USB端口或AC适配器,支持充电电流高达1.5A,输入电压高达28V,最大输入电流可在100-mA和500-mA选择,主要用在智能手机,手持媒体播放器,低功耗手持设备,手持游戏机,可穿戴,家庭自动化和手持医疗设备.本文介绍了bq24078主要特性,功能框图,主控制充电器应用电路以及评估模块bq24078 EVM主要特性,电路图,材料清单和PCB设计图.

The bq2407x is a family of integrated Li-Ion batterylinear chargers with system power path managementfunctionality targeted at space-constrained portableapplications. The devices operate from either a USBport or an AC adapter and support charge currents up to 1.5 A. The input voltage range with inputovervoltage protection supports unregulated adapters. The USB input current limit accuracy andstart up sequence allow the bq2407x to meet USB-IFinrush current specifications. Additionally, the inputdynamic power management (VIN-DPM) preventssystem crashes because of incorrectly configuredUSB sources and maximizes the power availablefrom the adapter.

The bq2407x features dynamic power pathmanagement (DPPM) that powers the system whilesimultaneously and independently charging thebattery. The DPPM circuit reduces the charge currentwhen the input current limit causes the system outputto fall to the DPPM threshold; thus, supplying thesystem load at all t

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