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参数资料
| 型号： | LTC4155IUFD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 41/52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
APPLICATIONS INFORMATION
α T ≡ T
α TOO _ COLD ≡
β ? ? ?? ?? ?? ?
α T
= e
R TEMP_RANGE
Optional dilution resistor, connected in series with
the thermistor.
r
r 25
Thermistor resistance ratio at any temperature T relative
to its reference temperature.
r TOO _ COLD
r 25
Thermistor resistance ratio at desired NTC_TOO_COLD
threshold temperature relative to its reference
temperature.
This parameter is dependent only upon the material prop-
erties of the thermistor. α T for a given thermistor and
temperature may be found in one of two ways. Thermistor
manufacturers often provide a lookup table relating α T to
temperature in their data sheets. For any temperature T,
α T may be referenced directly.
The second way to obtain α T for any T requires the use
of a modeling equation and a material constant specific
to the thermistor:
? ? 1 ? ? 1 ? ?
? ? ? T ? ? T 0 ? ? ?
where:
α TOO _ WARM ≡
r TOO _ WARM
r 25
e = Natural logarithm base, approximately 2.71828
T = Temperature of interest, expressed in Kelvin
Thermistor resistance ratio at desired NTC_TOO_WARM
threshold temperature relative to its reference
temperature.
T 0 = Thermistor model nominal temperature, expressed
in Kelvin. Typically 298.15K (25°C + 273.15°C)
≡ HOT _ FAULT
α HOT _ FAULT
r
r 25
β = Model material constant, expressed in Kelvin. This
model is a curve fit at T 0 and a second temperature. β is
close to 4000K for most thermistors. Higher β results in
α BIAS ≡ BIAS
α TEMP _ RANGE ≡
ThermistorresistanceratioatdesiredNTC_HOT_FAULT
threshold temperature relative to its reference tem-
perature.
R
r 25
Ratio of low drift bias resistor to r 25 .
R TEMP _ RANGE
r 25
Ratio of optional low drift dilution resistor to r 25 .
Note that r 25 , r T , r TOO_COLD , r TOO_WARM , and r HOT_FAULT
and are all resistance values of the thermistor at different
temperatures, while R BIAS and R TEMP_RANGE are actual
low drift resistors.
In all of the following calculations, it will be necessary to
determine the thermistor’s α T at various temperatures.
increased temperature sensitivity at the expense of reduced
linearity over a wide temperature range
Simple Alternate Thermistor Bias Network
By simply adjusting the bias resistor, R BIAS , and omitting
the optional R TEMP_RANGE , one of the three temperature
thresholds may be adjusted. The other two temperature
comparator thresholds will be determined by the choice
of the first temperature threshold and the NTCVAL
thresholds fixed in the LTC4155. Increasing R BIAS above
r 25 shifts all three temperature thresholds colder while
simultaneously slightly compressing the temperature span
between thresholds. Likewise, decreasing R BIAS below
r 25 shifts all three temperature thresholds warmer while
simultaneously slightly expanding the temperature span
between thresholds. To program a single temperature
threshold, obtain the value of either α TOO_COLD ,
α TOO_WARM or α HOT_FAULT for the chosen temperature
threshold using one of the aforementioned methods and
4155fc
41
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相关代理商/技术参数 |
参数描述 |
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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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