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参数资料
| 型号： | BQ26221PWR |
| 厂商： | Texas Instruments |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MONITOR HP 8-TSSOP |
| 标准包装： | 1 |
| 功能： | 电池监控器 |
| 电池化学： | 多化学 |
| 电源电压： | 2.8 V ~ 4.5 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1020 (CN2011-ZH PDF) |
| 其它名称： | 296-17161-6 |
bq26221
SLUS607 ? MAY 2004
APPLICATION INFORMATION
PACK+
C4
0.1 μ F
U1
bq26221PW
+
C3
0.1 μ F
1
2
RBI
VCC
GPIO 8
SRP 7
R2
100 k ?
HDQ
Additional ESD
Protection
R5 R4
100 ? 100 ?
3
4
VSS
HDQ
SRN 6
BAT 5
C1
0.1 μ F
R3
100 k ?
R1
0.02 ?
D1
5.6 V
C2
0.1 μ F
Protection Controller
PACK?
UDG?04012
Figure 3. Typical Application Circuit for a Single-Cell Li-Ion Application
functional description
The bq26221 measures the voltage drop across a low-value series current-sense resistor between the SRP
and SRN pins using a voltage-to-frequency converter. The cell voltage is sensed between the BAT and VSS
pins. All data is placed into various internal counter and timer registers. Using information from the bq26221,
the system host can determine the battery state-of-charge, estimate self discharge, and calculate the average
charge and discharge currents. During pack storage periods, the use of an internal temperature sensor doubles
the self-discharge count rate every 10 ° C above 25 ° C. The VFC offset is automatically compensated for in the
charge and discharge counter registers.
Access to the registers and control of the bq26221 is accomplished through a single-wire interface through a
register mapped command protocol. This protocol includes placing the device in the low-power mode,
hardware-register reset, programming flash from RAM, and transferring flash data to RAM.
The bq26221 can operate directly from a single Li-Ion cell as long as V CC is between 2.8 V and 4.5 V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BQ26221PWRG4 | 功能描述:电池管理 Hi-Performance Batt Monitor IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ26230PW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| BQ26231 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW COST BATTERY COULOMB COUNTER FOR EMBEDDED PORTABLE APPLICATIONS |
| BQ26231EVM-001 | 功能描述:电源管理IC开发工具 BQ26231 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| BQ26231PW | 功能描述:电池管理 Cost-Efficient Coulomb Counter RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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