BQ2954 锂离子开关模式充电管理 IC
BQ2954 描述
The bq2954 Li-Ion Charge-Management IC uses a flexible pulse-width modulation regulator to control voltage and current during charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design minimizes power dissipation.
For safety, the bq2954 inhibits fast charging until the battery voltage and temperature are within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2954 provides low-current conditioning of the battery.
For charge qualification, the bq2954 uses an external thermistor to measure battery temperature. Charging begins when power is applied or the battery is inserted
The bq2954 charges a battery in two phases
|
BQ2954 |
| # Series Cells |
Multiple |
| Charge Current(Max)(A) |
>2 |
| Charge Status Outputs |
2 |
| Control Topology |
Switchmode |
| Switching Frequency(kHz) |
100 |
| Primary Charge Termination Method |
Minimum Current |
| Pin/Package |
16PDIP, 16SOIC |
| Vin(Max)(V) |
7 |
| Battery Charge Voltage(V) |
adjustable |
BQ2954 特性
- Safe charge of Li-Ion battery packs
- Pulse-width modulation control for current and voltage regulation
- Programmable high-side/low-side current-sense
- Fast charge terminated by selectable minimum current; safety backup termination at maximum time
- Precharge qualification detects shorted or damaged cells and conditions battery
- Charging continuously qualified by temperature and voltage limits
- Direct LED control outputs to display charge status and fault conditions
BQ2954 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ2954PN |
ACTIVE |
0 to 70 |
2.00 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| BQ2954PNE4 |
ACTIVE |
0 to 70 |
2.00 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| BQ2954SN |
ACTIVE |
0 to 70 |
2.40 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| BQ2954SNG4 |
ACTIVE |
0 to 70 |
2.40 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| BQ2954SNTR |
ACTIVE |
0 to 70 |
2.00 | 1ku |
SOIC (D) | 16 |
1 | LARGE T&R |
|
| BQ2954SNTRG4 |
ACTIVE |
0 to 70 |
2.00 | 1ku |
SOIC (D) | 16 |
1 | LARGE T&R |
|
BQ2954 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 |
| BQ2954PN |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
BQ2954PN |
BQ2954PN |
| BQ2954PNE4 |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
BQ2954PNE4 |
BQ2954PNE4 |
| BQ2954SN |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
BQ2954SN |
BQ2954SN |
| BQ2954SNG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
BQ2954SNG4 |
BQ2954SNG4 |
| BQ2954SNTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
BQ2954SNTR |
BQ2954SNTR |
| BQ2954SNTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
BQ2954SNTRG4 |
BQ2954SNTRG4 |
BQ2954 应用技术支持与电子电路设计开发资源下载
- BQ2954 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)
- 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)
BQ2954 相关工具
