計算工具
BQ24707
- SMBus Host-Controlled NMOS-NMOS
Synchronous Buck Converter With Programmable
615 kHz, 750 kHz, and 885 kHz Switching
Frequency - Real-Time System Control on ILIM Pin to Limit
Charge Current - Enhanced Safety Features for Overvoltage
Protection, Overcurrent Protection, Battery,
Inductor, and MOSFET Short-Circuit Protection - Programmable Input Current, Charge Voltage,
Charge Current Limits- ±0.5% Charge Voltage Accuracy up to 19.2 V
- ±3% Charge Current Accuracy up to 8.128 A
- ±3% Input Current Accuracy up to 8.064 A
- ±2% 20× Adapter Current or Charge Current
Output Accuracy
- Programmable Adapter Detection and Indicator
- Independent Comparator With Internal Reference
- Integrated Soft-Start
- Integrated Loop Compensation
- AC Adapter Operating Range 5 V to 24 V
- 15-µA Off-State Battery Discharge Current
- 20-pin 3.5 mm × 3.5 mm QFN Package
- bq24707: ACOK Delay Default 1.3 s
- bq24707A: ACOK Delay Default 1.2 ms
- APPLICATIONS
- Portable Notebook Computers, UMPCs, Ultra-Thin
Notebooks, and Netbooks - Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Portable Equipment
- Portable Notebook Computers, UMPCs, Ultra-Thin
All other trademarks are the property of their respective owners
The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.
SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.
The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.
The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.
技術文件
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檢視所有 3 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq24707x 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Protection datasheet (Rev. C) | PDF | HTML | 2015年 7月 31日 |
| Application note | Autonomous Smart Battery Guide | PDF | HTML | 2021年 10月 15日 | |
| Application note | How to Review a Multicell Switching Charger Schematic | 2011年 9月 21日 |
設計與開發
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參考設計
TIDA-00038 — 多節電池同步切換模式參考設計
This reference design is a complete charger module for evaluating a multicell (1 to 4 cells) synchronous notebook charger using the bq24707 device. It is designed to deliver up to 4 A of charge current to Li-ion or Li-polymer applications. The charge current is programmable by an SMBus interface (...)
| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN (RGR) | 20 | 檢視選項 |
訂購與品質
內含資訊：
- 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
內含資訊：
- 晶圓廠位置
- 組裝地點