BQ24232H_15 Datasheet, PDF (11/42 Pages) Texas Instruments – bq2423xx USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC

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9 Detailed Description
bq24230H, bq24232H
SLUSBI8A – JANUARY 2014 – REVISED DECEMBER 2014
9.1 Overview
The bq2423xH devices are integrated Li-ion linear chargers and system power-path management devices
targeted at space-limited portable applications. The device powers the system while simultaneously and
independently charging the battery. This feature reduces the number of charge and discharge cycles on the
battery, allows for proper charge termination, and enables the system to run with a defective or absent battery
pack. This feature also allows instant system turnon even with a totally discharged battery. The input power
source for charging the battery and running the system can be an AC adapter or a USB port. The devices feature
dynamic power-path management (DPPM), which shares the source current between the system and battery
charging and automatically reduces the charging current if the system load increases. When charging from a
USB port, the input dynamic power management (V_IN-DPM) circuit reduces the input current limit if the input
voltage falls below a threshold, thus preventing the USB port from crashing. The power-path architecture also
permits the battery to supplement the system current requirements when the adapter cannot deliver the peak
system currents.
Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: bq24230H bq24232H
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