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参数资料
| 型号： | LTC4066EPF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 21/28页 |
| 文件大小： | 0K |
| 描述： | IC USB POWER MANAGER 24-UTQFN |
| 标准包装： | 2,500 |
| 功能： | 电源管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-UFQFN 裸露焊盘 |
| 供应商设备封装： | 24-UTQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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LTC4066/LTC4066-1
APPLICATIONS INFORMATION
R NOM =
? ? ( R COLD HOT ) – R HOT
R 1 = ?
? 0 . 4086 ?
? 2 . 815 – 0 . 4086 ?
R NOM =
? R NTC at 25 ° C
R NOM =
? R NTC at 25 ° C
R COLD – R HOT 100 k ? ( 3 . 266 – 0 . 3602 )
? ? ( 3 . 266 – 0 . 3602 ) – 0 . 3602 ?
R 1 = 100 k ? ? ?
Power conscious designs may want to use thermistors
whose room temperature value is greater than 10k. Vishay
Dale has a number of values of thermistor from 10k to
100k that follow the “R-T Curve 2.” Using these directly
in the manor spelled out previously in the NTC Thermistor
section will give temperature trip points of approximately
3°C and 47°C, a delta of 44°C. This delta in temperature
can be moved in either direction by changing the value of
R NOM with respect to R NTC . Increasing R NOM will move
both trip points to lower temperatures. Likewise a decrease
in R NOM with respect to R NTC will move the trip points to
higher temperatures. To calculate R NOM for a shift to lower
temperature for example, use the following equation:
R COLD
2 . 815
where R COLD is the resistance ratio of R NTC at the desired
cold temperature trip point. If you want to shift the trip points
to higher temperatures, use the following equation:
R HOT
0 . 4086
where R HOT is the resistance ratio of R NTC at the desired
hot temperature trip point.
Here is an example using a 100k R-T Curve 1 Thermistor
from Vishay Dale. The difference between the trip points
is 44°C, from before, and we want the cold trip point to
be 0°C, which would put the hot trip point at 44°C. The
R NOM needed is calculated as follows:
The nearest 1% value for R NOM is 115k. This is the value
used to bias the NTC thermistor to get cold and hot trip
points of approximately 0°C and 44°C respectively. To
extend the delta between the cold and hot trip points,
a resistor (R1) can be added in series with R NTC (see
Figure 3b). The values of the resistors are calculated as
follows:
R COLD – R HOT
2 . 815 – 0 . 4086
– R
where R NOM is the value of the bias resistor, R HOT and
R COLD are the values of R NTC at the desired temperature
trip points. Continuing the example from before with a
desired hot trip point of 50°C:
R NOM = =
2 . 815 – 0 . 4086 2 . 815 – 0 . 4086
= 120 . 8 k Ω , 121 k nearest 1 %
? ? 0 . 4086 ? ?
? ? 2 . 815 – 0 . 4086 ? ?
= 13 . 3 k Ω , 13 . 3 k is nearest 1 %
The ?nal solution is as shown if Figure 3b where R NOM =
121k, R1 = 13.3k and R NTC = 100k at 25°C.
Gas Gauge
The extremely low impedance of the ideal diode between
R NOM =
=
R COLD
2 . 815
3.266
2 . 815
? R NTC at 25 ° C
? 100 k Ω = 116 k Ω
BAT and OUT (typically 50mΩ) allows users to connect
all of their loads to the OUT pin. Such a con?guration puts
the LTC4066/LTC4066-1 in a unique position whereby it
can monitor all of the current that ?ows into and out of the
battery. Two output pins, I STAT and POL, are provided to
enable users to monitor and integrate the battery current
for a true gas gauge function.
4066fc
21
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| LTC4066EUF#PBF | 功能描述:IC USB POWER MANAGER 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能: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 ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4066EUF#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能: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 ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4066EUF-1#PBF | 功能描述:IC USB POWER MANAGER 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能: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 ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4066EUF-1#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能: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 ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4067 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with OVP and Li-Ion/Polymer Charger |
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