The bq2423xH series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter and support charge currents from 25 mA to 500 mA. The high-input voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423xH to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq2423xH 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, this feature enables instant system turn-on even with a totally discharged battery. The power-path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus 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 | bq2423xx USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC datasheet (Rev. B) | PDF | HTML | 08 Apr 2017 |
| Application note | Configuring Standalone Linear Power Path Chargers (Rev. A) | PDF | HTML | 06 Apr 2020 | |
| Application note | Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) | 01 May 2018 | ||
| Analog Design Journal | 2Q 2016 Analog Applications Journal Issue | 26 Apr 2016 | ||
| Analog Design Journal | Battery-charging considerations for low-power applications | 26 Apr 2016 | ||
| User guide | bq24230H and bq24232H 1.5-A Single-Chip Li-Ion | 29 Jan 2014 |
For additional terms or required resources, click any title below to view the detail page where available.
The bq2423XH evaluation module (EVM) is a complete charger module for evaluating compact, linear mode battery charge and power path management solution for single-cell, Li-ion and Li-polymer battery-powered systems used in a wide range of portable applications.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |
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