BQ24232
- Fully Compliant USB Charger
- Selectable 100-mA and 500-mA Maximum Input Current
- 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
- Input-based Dynamic Power Management (VIN- DPM) for Protection Against Poor USB Sources
- 28-V Input Rating With Overvoltage Protection
- Integrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
- Supports up to 500-mA Charge Current With Current Monitoring Output (ISET)
- Programmable Input Current Limit up to 500 mA for Wall Adapters
- Programmable Termination Current (bq24232)
- Programmable Precharge and Fast-Charge Safety Timers
- Reverse Current, Short-Circuit, and Thermal Protection
- NTC Thermistor Input
- Proprietary Start-Up Sequence Limits Inrush Current
- Status Indication – Charging/Done, Power Good
- Small 3 mm × 3 mm 16-Lead QFN Package
The bq2423x 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 between 25 mA and 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 bq2423x to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq2423x 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 enables instant system turn-on 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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq2423x USB-Friendly Lithium-Ion Battery Charger And Power-Path Management IC datasheet (Rev. J) | PDF | HTML | 2017年 4月 8日 |
| Application note | Configuring Standalone Linear Power Path Chargers (Rev. A) | PDF | HTML | 2020年 4月 6日 | |
| Application note | BQ2423X external NTC control reference design | 2019年 3月 22日 | ||
| Application note | Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) | 2018年 5月 1日 | ||
| User guide | bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) | 2017年 1月 3日 | ||
| Analog Design Journal | Battery-charging considerations for low-power applications | 2016年 4月 26日 | ||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 2014年 8月 18日 | ||
| More literature | Adapting Qi-compliant wireless-power solutions to low-power wearable products | 2014年 6月 6日 | ||
| Application note | Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application | 2012年 11月 8日 |
設計與開發
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BQ24232EVM — BQ24232 評估模組
This user’s guide describes the bq24072/3/4/5 and bq24320/2 (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 and bq24320/2 product (...)
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。