現在提供此產品的更新版本
功能相同,但引腳輸出與所比較的裝置不同
BQ24076
- 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 1.5-A Charge Current with Current Monitoring Output (ISET)
- Programmable Input Current Limit up to 1.5 A for Wall Adapters
- System Output Tracks Battery Voltage
- Battery Disconnect Function with SYSOFF Input
- Programmable Pre-Charge and Fast-Charge Safety Timers
- Reverse Current, Short-Circuit, and Thermal Protection
- NTC Thermistor Input
- Proprietary Start-up Sequence Limits Inrush Current
- Battery Charge Voltage, VBAT:
- bq24076 - 4.4 V (typ)
- bq24078 - 4.35 V (typ)
- Status Indication – Charging/Done, Power Good
The bq2407x is a family of integrated Li-Ion battery linear chargers with system power path management functionality targeted at space-constrained portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents system crashes because of incorrectly configured USB sources and maximizes the power available from the adapter.
The bq2407x 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, the regulated system input enables instant system turn-on when plugged in 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.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | bq2407x 1.5-A High Battery Voltage Li-Ion Battery Chargers with Power-Path Management IC datasheet (Rev. A) | PDF | HTML | 2017年 12月 14日 |
User guide | Achieving Ship Mode With the BQ24075, BQ24076, BQ24078, and BQ24079 | PDF | HTML | 2021年 11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 | ||
EVM User's guide | bq24076, bq24078 1.5-A Single-Chip Li-Ion and Li-Polymer CM IC EVM | 2017年 10月 9日 |
設計與開發
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BQ24076EVM-015 — bq24076 1.5A 單晶片鋰離子和鋰聚合物電池充電器管理 IC 評估模組
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