BQ24232HA
- 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
- Selectable 100-mA and 500-mA Maximum
- 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
- 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 bq24232HA device is a highly integrated Li-ion linear charger and system power-path management device targeted at space-limited portable applications. The device operates from either a USB port or ac adapter and supports 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 bq24232HA 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 bq24232HA 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 | bq24232HA USB-Friendly Lithium-Ion Battery Charger and Power-Path Management IC datasheet | PDF | HTML | 2016年 5月 5日 |
| Application note | Configuring Standalone Linear Power Path Chargers (Rev. A) | PDF | HTML | 2020年 4月 6日 | |
| Application note | Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) | 2018年 5月 1日 |
設計與開發
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| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN (RGT) | 16 | 檢視選項 |
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
- 資格摘要
- 進行中可靠性監測
- 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。