BQ24305 过压和过流保护 IC 和锂离子充电器前端保护 IC
BQ24305 描述
The bq24300 and bq24304 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The device operates like a linear regulator: for voltages up to the Input Overvoltage threshold, the output is held at 5.5V (bq24300), 5.0V (bq24305) or 4.5V (bq24304). In case of an input overvoltage condition, if the overvoltage condition persists for more than a few microseconds, the IC removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the current to a safe value for a blanking duration before turning the switch off.
|
BQ24300 |
BQ24304 |
BQ24305 |
| Input Voltage(Max)(V) |
30 |
30 |
30 |
| Input Over-Voltage Protection(V) |
10.5 |
10.5 |
10.5 |
| Input Over-Current Protection(A) |
0.3 |
0.3 |
0.3 |
| Battery Over-Voltage Protection(Max)(V) |
4.4 |
4.4 |
4.4 |
| Battery Over-Voltage Protection(Typ)(V) |
4.35 |
4.35 |
4.35 |
| Optional Functions |
Reverse polarity protection |
Reverse polarity protection |
Reverse polarity protection |
BQ24305 特性
- Provides Protection for Three Variables:
- Input Overvoltage
- Input Overcurrent with Current Limiting
- Battery Overvoltage
- 30V Maximum Input Voltage
- Optional Input Reverse Polarity Protection
- High Immunity Against False Triggering Due to Voltage Spikes
- Robust Against False Triggering Due to Current Transients
- Thermal Shutdown
- Enable Function
- Small 2 mm × 2 mm 8-Pin SON Package
- LDO Mode Voltage Regulation Options:
- 5.5V on BQ24300
- 4.5V on BQ24304
- 5.0V on bq24305
- APPLICATIONS
- Bluetooth Headsets
- Low-Power Handheld Devices
BQ24305 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 |
| BQ24305DSGR |
ACTIVE |
-40 to 125 |
0.55 | 1ku |
WSON (DSG) | 8 |
3000 | LARGE T&R |
NXQ |
| BQ24305DSGT |
ACTIVE |
-40 to 125 |
0.65 | 1ku |
WSON (DSG) | 8 |
250 | SMALL T&R |
NXQ |
BQ24305 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 |
| BQ24305DSGR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ24305DSGR |
BQ24305DSGR |
| BQ24305DSGT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ24305DSGT |
BQ24305DSGT |
BQ24305 应用技术支持与电子电路设计开发资源下载
- BQ24305 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)
- QFN Layout Guidelines (PDF 1279 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)
- PowerPADTM 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)
BQ24305 相关工具