The BQ2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The BQ2405x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.
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 an 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | BQ2405x 1-A, Single-Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor and USB Detection datasheet (Rev. D) | PDF | HTML | 26 May 2021 |
| Application note | BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions | 25 Feb 2019 | ||
| Application note | Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio | 29 Nov 2012 | ||
| Analog Design Journal | 2Q 2012 Issue Analog Applications Journal | 26 Apr 2012 | ||
| Analog Design Journal | Charging a three-cell nickel-based battery pack with a Li-Ion charger | 26 Apr 2012 | ||
| Analog Design Journal | Li-ion battery-charger solutions for JEITA compliance | 29 Jan 2010 | ||
| User guide | 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger UG | 29 Sep 2009 |
For additional terms or required resources, click any title below to view the detail page where available.
The bq2405x series of devices are highly integrated Li-ion linear chargers devices targeted atspace-limited portable applications. The devices operate from either a USB port or AC adapter.The bq2405x has a single power output that charges the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DSQ) | 10 | Ultra Librarian |
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