BQ24232H_15 Datasheet, PDF (25/42 Pages) Texas Instruments – bq2423xx USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC

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10 Application and Implementation
bq24230H, bq24232H
SLUSBI8A – JANUARY 2014 – REVISED DECEMBER 2014
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
The bq2423xH devices power the system while simultaneously and independently charging the 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, 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.
The bq24232xH is configureable to be host controlled for selecting different input current limits based on the
input source connected, or a fully stand alone device for applications that do not support multiple types of input
sources.
10.2 Typical Application
V_IN = V_UVLO to V_OVP , I_FASTCHG = 200 mA, I_IN(MAX) = 500 mA, Battery Temperature Charge Range 0°C to 50°C,
6.25-hour Fast Charge Safety Timer.
Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: bq24230H bq24232H
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