参数资料
型号: BQ2057WSNG4
厂商: Texas Instruments
文件页数: 9/31页
文件大小: 0K
描述: IC LITH-ION LDO CHRG MGMT 8-SOIC
标准包装: 75
功能: 充电管理
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4.5 V ~ 15 V
工作温度: -20°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
配用: 296-9503-ND - EVAL MOD FOR BQ2057W
bq2057, bq2057C
bq2057T, bq2057W
SLUS025F ? MAY 2001 ? REVISED JULY 2002
APPLICATION INFORMATION
Preconditioning
Phase
Current Regulation
Phase
Voltage Regulation and Charge
Termination Phase
Regulation Voltage
Regulation Current
Minimum Charge
Voltage
Preconditioning
and Taper Detect
Figure 3. Typical Charge Profile
qualification and precharge
When power is applied, the bq2057 starts a charge-cycle if a battery is already present or when a battery is
inserted. Charge qualification is based on battery temperature and voltage. The bq2057 suspends charge if the
battery temperature is outside the V (TS1) to V (TS2) range and suspends charge until the battery temperature is
within the allowed range. The bq2057 also checks the battery voltage. If the battery voltage is below the
precharge threshold V (min) , the bq2057 uses precharge to condition the battery. The conditioning charge rate
I (PRECHG) is set at approximately 10% of the regulation current. The conditioning current also minimizes heat
dissipation in the external pass-element during the initial stage of charge. See Figure 3 for a typical
charge-profile.
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BQ2057WSNTR 功能描述:电池管理 Li-Ion LDO Linear Charge Management 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
BQ2057WSNTRG4 功能描述:电池管理 Li-Ion LDO Linear Charge Management 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
BQ2057WTS 功能描述:电池管理 Li-Ion LDO Linear Charge Management 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
BQ2057WTSG4 功能描述:电池管理 Li-Ion LDO Linear Charge Management 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
BQ2057WTSTR 功能描述:电池管理 Li-Ion LDO Linear Charge Management 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