The bq24075-Q1 device is integrated Li-ion linear charger and system power path management device targeted at space-limited portable applications. The device operate from either a USB port or AC adapter and support charge currents up to 1.5A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq24075-Q1 to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.
The bq24075-Q1 features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. 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.
Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged 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, enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning, 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. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | 1.5-A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC datasheet (Rev. B) | 07 Mar 2012 | |
| Technical article | When to use rechargeable batteries in small battery applications | 01 Oct 2019 | ||
| User guide | bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) | 03 Jan 2017 | ||
| Technical article | Is a LiFePO4 or Lithium-ion battery better for eCall systems? | 25 Oct 2016 | ||
| Technical article | Should I use a linear charger or a switching charger? | 31 Oct 2015 | ||
| Technical article | Summertime and the livin' is easy | 20 Jun 2014 | ||
| Application note | Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application | 08 Nov 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 (bqTiny-III™) evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24072/3/4/5/9(T) and (...)
| Package | Pins | Download |
|---|---|---|
| VQFN (RGT) | 16 | View options |
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