参数资料
型号: BQ2057TTSG4
厂商: Texas Instruments
文件页数: 13/31页
文件大小: 0K
描述: IC LI-ION LDO CHRG MGMT 8-TSSOP
标准包装: 150
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-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 8-TSSOP
包装: 管件
配用: 296-9502-ND - EVAL MOD FOR BQ257T
bq2057, bq2057C
bq2057T, bq2057W
SLUS025F ? MAY 2001 ? REVISED JULY 2002
APPLICATION INFORMATION
battery temperature monitoring (continued)
For PTC Thermistors
R
T1
+
5
3
R
R
TH
TH
R
* R
TC
TC
(5)
TH
TH
TC
R
T2
+
2
5
R
R
– 7
R
TC
R
(6)
Where R (TC) is the cold temperature resistance and R (TH) is the hot temperature resistance of thermistor, as
specified by the thermistor manufacturer.
R T1 or R T2 can be omitted If only one temperature (hot or cold) setting is required. Applying a voltage between
the V (TS1) and V (TS2) thresholds to pin TS disables the temperature-sensing feature.
DC+
RT1
DC?
RSNS
SNS
BAT
VCC
bq2057
COMP
CC
VSS
BAT+
DC+
SNS
BAT
VCC
bq2057
COMP
CC
VSS
BAT+
TS
STAT
TS
STAT
RT1
DC?
RT2
BAT?
Thermistor
RT2
Thermistor
BAT?
RSNS
High-Side Current Sensing
Low-Side Current Sensing
Figure 9. Temperature Sensing Circuits
VCC
Temperature Fault
V(TS2)
Normal Temperature Range
V(TS1)
Temperature Fault
VSS
Figure 10. bq2057 TS Input Thresholds
www.ti.com
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