BQ24770
- Host-controlled NVDC-1 1S-4S Battery Charge Controller with 4.5-24 V Input Range
- Support SMBus (bq24770) and I2C (bq24773)
- System Instant-on Operation with no Battery or Deeply Discharged Battery
- Supplement Mode with Synchronous BATFET Control when Adaptor is fully loaded
- Ultra Fast Input Current DPM at 100 µs
- Ultra Low Quiescent Current of 600 µA and High PFM Light Load Efficiency >80% at 20 mA Load to Meet Energy Star and ErP Lot6.
- High Accuracy Power / Current Monitor for CPU Throttling
- Comprehensive PROCHOT Profile
- Input and Battery Current Monitor (IADP/IBAT)
- System Power Monitor (PMON)
- Programmable Input Current Limit, Charge Voltage, Charge Current and Minimum System Voltage Regulation
- ±0.5% Charge Voltage (16 mV/step)
- ±2% Input/charge Current (64 mA/step)
- ±2% 40x Input / 16x Discharge / 20x Charge Current Monitor
- Support Battery LEARN Function
- High Integration
- NMOS ACFET and RBFET Driver
- PMOS battery FET Gate Driver
- Internal Loop Compensation
- Independent Comparator
- Automatic Trickle Charge to Wake up Gas Gauge
- 600kHz to 1.2MHz Programmable Switching Frequency
The bq2477x is high-efficiency, synchronous, NVDC-1 battery charge controllers, offering low component count for space-constraint, multi-chemistry battery charging applications.
The power path management allows the system to be regulated at battery voltage but does not drop below system minimum voltage (programmable). With this feature, the system keeps operating even when the battery is completely discharged or removed. The power path management allows the battery to provide supplement current to the system to keep the input supply from being overloaded.
The bq2477x provides drivers and power path management for N-channel ACFET and reverse blocking FET. The devices provides driver to control NVDC operation of external P-channel battery FET. It also drives high-side and low-side MOSFETs of the switching regulator.
The bq2477x monitors adapter current (IADP), battery charge/discharge current (IBAT) and system power (PMON). The flexibly programmed PROCHOT output goes directly to CPU for throttle back when needed.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq2477x NVDC Battery Charge Controller With System Power Monitor and Processor Hot Indicator datasheet (Rev. C) | PDF | HTML | 2016年 12月 19日 |
| Application note | Autonomous Smart Battery Guide | PDF | HTML | 2021年 10月 15日 | |
| EVM User's guide | bq2477x EVM User’s Guide (Rev. C) | 2016年 11月 8日 | ||
| Application note | Implementing Peak Power Shift Function With bq24770 | 2016年 5月 19日 |
設計與開發
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BQ24770EVM-540 — 具有 SMBus 的 NVDC 電池充電控制器評估模組
The bq2477x evaluation module (EVM) is an SMBus controlled NVDC-1 charge controller with N-CH MOSFET Selector and Current Monitoring. The input voltage range, for the buck converter, is between 6 and 24 V, with a programmable output of 1–4 cells (bq2477x) and a charge output current range of (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RUY) | 28 | 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。