BQ24725 具有 N 通道功率 MOSFET 选择器的 2-4 节锂离子电池 SMBus 充电控制器
BQ24725 描述
The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.
The bq24725 uses 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 high regulation accuracies that can be programmed by the system power management micro-controller.
The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3
|
BQ24725 |
| # Series Cells |
2-4 |
| Charge Status Outputs |
1 |
| Control Topology |
Switchmode |
| Switching Frequency(kHz) |
615, 750 and 885 |
| Primary Charge Termination Method |
Host Controlled |
| Pin/Package |
20VQFN |
| Optional Functions |
LEARN function |
BQ24725 特性
- 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 LERAN 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 9V-24V
- 5µA Off-State Battery Discharge Current
- 20-pin 3.5 × 3.5 mm2 QFN Package
- APPLICATIONS
- Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
- Personal Digital Assistant
- Handheld Terminal
BQ24725 芯片订购指南
| 器件 |
状态 |
温度 |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ24725RGRR |
ACTIVE |
-40 to 85 |
3.10 | 1ku |
VQFN (RGR) | 20 |
3000 | LARGE T&R |
PAS |
| BQ24725RGRT |
ACTIVE |
-40 to 85 |
3.60 | 1ku |
VQFN (RGR) | 20 |
250 | SMALL T&R |
PAS |
BQ24725 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| BQ24725RGRR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-250C-1 YEAR |
BQ24725RGRR |
BQ24725RGRR |
| BQ24725RGRT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-250C-1 YEAR |
BQ24725RGRT |
BQ24725RGRT |
BQ24725 应用技术支持与电子电路设计开发资源下载
- BQ24725 数据资料 dataSheet 下载.PDF
- TI 德州仪器电池管理产品选型与价格 . xls
- 照明和显示屏电源选择指南 (PDF 1427 KB)
- 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- PowerPAD™ Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
BQ24725 相关工具
