BQ24725A
- SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies
- Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps
- Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circuit protection
- Programmable input current, charge voltage, charge current limits
- ±0.5% Charge voltage accuracy up to 19.2V
- ±3% Charge current accuracy up to 8.128A
- ±3% Input current accuracy up to 8.064A
- ±2% 20x Adapter current or charge current amplifier output accuracy
- Programmable battery depletion threshold, and battery LEARN function
- Programmable adapter detection and indicator
- Integrated soft start
- Integrated loop compensation
- Real time system control on ILIM pin to limit charge current
- AC Adapter operating range 4.5V-24V
- 5µA Off-state battery discharge current
- 0.65mA (0.8mA max) Adapter standby quiescent current
- 20-pin 3.5 x 3.5 mm2 VQFN Package
The BQ24725A is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.
The BQ24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.
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 BQ24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The BQ24725A charges one, two, three or four series Li+ cells.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | BQ24725A SMBus 1- to 4-Cell Li+ Buck Battery Charge Controller with N-Channel Power MOSFET Selector datasheet (Rev. C) | PDF | HTML | 2019/10/2 | ||
| 應用說明 | Autonomous Smart Battery Guide | PDF | HTML | 2021/10/15 | |||
| 技術文章 | Using battery charger ICs to shrink your design for vacuum robots | PDF | HTML | 2018/3/21 | |||
| 應用說明 | How to Review a Multicell Switching Charger Schematic | 2011/9/21 |
設計與開發
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BQ24725AEVM-710 — BQ24725A 1 到 4 芯鋰離子電池 SMBus 充電控制器評估模組
The BQ24725AEVM-710 evaluation module (EVM) is a complete charger module for evaluating a multicell synchronous notebook turbo boost charge using the bq24725A 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 (...)
TI-CHARGER-GUI — 適於與 USB2ANY 和電池充電搭配使用的 GUI 軟體評估模組
SLUC258 — bq24725A/735/728/738 SMBus Gui
SLUC203 — bq24725_725A_726_707_73x Calculation Tool
PMP21618 — 適用於 12-V 鉛酸電池充電器的通用輸入參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGR) | 20 | Ultra Librarian |
訂購與品質
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。