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参数资料
| 型号： | LTC4155IUFD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 33/52页 |
| 文件大小： | 0K |
| 描述： | IC I2C POWER MANAGER DUAL 28QFN |
| 标准包装： | 2,500 |
| 系列： | PowerPath™ |
| 功能： | 充电管理，电源管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN（4x5） |
| 包装： | 带卷 (TR) |
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LTC4155
OPERATION
r T κ SPAN ? NTCVAL + κ OFFSET
1 ? κ SPAN ? NTCVAL – κ OFFSET
T =
ln ( α Τ ) +
thermistor current, and its associated battery drain by a
factor of 2000 from its DC value. A typical network using
a 10k thermistor causes 115nA of battery drain. A 100k
thermistor would reduce this drain to 11.5nA.
To improve measurement resolution over the temperature
range of interest, the full-scale range of the analog-to-
digital converter is restricted to the range 0.113 to 0.895
NTCBIAS. The NTC ADC result can be interpreted as follows:
α T ≡ =
r 25
where NTCVAL is the decimal representation of the
NTCVAL[6:0] status report in the range [0-127], ADC con-
stant κ SPAN = 0.006162, ADC constant κ OFFSET = 0.1127,
r T is the resistance of the thermistor at temperature T,
and α T is the resistance ratio of the thermistor at the two
temperatures T and 25°C.
Thermistor manufacturer data sheets will either provide a
temperature lookup table relating α T to T, or will supply a
curve fit parameter β which can be used with the follow-
ing equations to determine the thermistor temperature:
β
β
T 0
In addition to thermistor value reporting, the LTC4155
automatically pauses battery charging if the thermistor
reading falls outside of limits corresponding to the
range 0°C to 40°C for a Vishay curve 2 thermistor. The
NTC_TOO_COLD and NTC_TOO_WARM conditions
are encoded in the I 2 C status report NTCSTAT[1:0].
CHARGER_STATUS[2:0] will also report temperature
warnings and faults when the battery charger is enabled.
See Table 14 and Table 17. Optionally, a charger status
interrupt request may be generated when the thermistor
reading enters or exits this temperature range.
If the temperature reading is above a limit corresponding
to 60°C for a Vishay curve 2 thermistor, an optional
NTC_HOT_FAULT interrupt may be generated. In addition,
the overtemperature battery conditioner may be enabled
by I 2 C to minimize the time that the battery is exposed
simultaneously to high temperature and high voltage.
Refer to the Overtemperature Battery Conditioner section
for more detail.
The NTC_TOO_COLD temperature indication is triggered
when NTCVAL rises to decimal result 102. This corre-
sponds to a α COLD,WARNING = 2.86 and 0°C for a Vishay
curve 2 thermistor. The low temperature indication is
cleared when the NTCVAL falls to decimal result 98. This
corresponds to α COLD,RESET = 2.53 and 2°C for a Vishay
? κ SPAN ? NTCVAL + κ OFFSET ? β
ln ? ?+
T =
β
? 1 ? κ SPAN ? NTCVAL – κ OFFSET ? T 0
curve 2 thermistor.
The NTC_TOO_WARM temperature indication is triggered
when NTCVAL falls to decimal result 41. This corresponds
to α WARM,WARNING = 0.576 and 40°C for a Vishay curve?2
where:
T = Temperature result expressed in Kelvin
T 0 = Thermistor model nominal temperature, expressed
in Kelvin. Typically 298.15K (25°C + 273.15°C)
β = Thermistor model material constant, expressed in
Kelvin.
thermistor. The high temperature indication is cleared
when NTCVAL rises to decimal result 45. This corresponds
to α WARM,RESET = 0.639 and 37°C for a Vishay curve 2
thermistor.
The NTC_HOT_FAULT temperature indication is triggered
when NTCVAL falls to decimal result 19. This corre-
sponds to α CRITICAL,FAULT = 0.298 and 60°C for a Vishay
4155fc
33
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| LTC4156EUFD#PBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC4156EUFD#TRPBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4156IUFD#PBF | 功能描述:IC POWER LI-ION CHARGER 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:* 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
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| LTC4160 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Switching Power Manager with USB On-The-Go And Overvoltage Protection |
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