The bq2404x series of devices are highly integrated Li-ion linear charger devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter.The bq2404x 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 pre-charge current and termination current threshold are programmed via an external resistor on the bq24040. The fast charge current value is also programmable via an external resistor.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | 0.8-A, Single-Input Single-Cell Li-Ion Battery Charger UG | 29 Sep 2009 | |
| Data sheet | BQ2404x 1A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger datasheet (Rev. H) | 01 Feb 2021 | ||
| Certificate | BQ24040EVM EU Declaration of Conformity (DoC) | 02 Jan 2019 | ||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 18 Aug 2014 | ||
| User guide | 1-A Single-Input, Single-Cell Li-Ion Battery Charger | 31 Dec 2012 | ||
| Application note | Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio | 29 Nov 2012 |
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