- 您现在的位置：买卖IC网 > PDF目录16244 > LTC4097EDDB#TRMPBF (Linear Technology)IC CHARGER LI-ION/POLY 12-DFN PDF资料下载
参数资料
| 型号： | LTC4097EDDB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION/POLY 12-DFN |
| 标准包装： | 1 |
| 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： | 4.25 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN-EP（3x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1341 (CN2011-ZH PDF) |
| 其它名称： | LTC4097EDDB#TRMPBFDKR |
LTC4097
APPLICATIONS INFORMATION
VNTC
3
NTC BLOCK
VNTC
3
NTC BLOCK
R NOM
100k
NTC
6
0.765 ? VNTC
–
+
TOO_COLD
R NOM
105k
NTC
6
0.765 ? VNTC
–
+
TOO_COLD
R NTC
R1
100k
–
TOO_HOT
12.7k
–
TOO_HOT
0.349 ? VNTC
+
R NTC
0.349 ? VNTC
+
100k
+
NTC_ENABLE
+
NTC_ENABLE
0.1V
–
0.1V
–
4097 F04
Figure 4. Typical NTC Thermistor Circuit
and the cold trip point is set when:
4097 F05
Figure 5. NTC Thermistor Circuit with Additional Bias Resistor
where r HOT and r COLD are the resistance ratios at the
R NTC | COLD
R NOM + R NTC | COLD
? VNTC = 0 . 765 ? VNTC
desired hot and cold trip points. Note that these equations
are linked. Therefore, only one of the two trip points can
be chosen, the other is determined by the default ratios
designed in the IC. Consider an example where a 60°C
r COLD HOT
R NOM =
SolvingtheseequationsforR NTC|COLD andR NTC|HOT results
in the following:
R NTC|COLD = 0.536 ? R NOM
and
R NTC|COLD = 3.25 ? R NOM
By setting R NOM equal to R25, the above equations result
in r HOT = 0.536 and r COLD = 3.25. Referencing these ratios
to the Vishay Resistance-Temperature Curve 1 chart gives
a hot trip point of about 40°C and a cold trip point of about
0°C. The difference between the hot and cold trip points
is approximately 40°C.
By using a bias resistor, R NOM , different in value from R25,
the hot and cold trip points can be moved in either direc-
tion. The temperature span will change somewhat due to
the non-linear behavior of the thermistor. The following
equations can be used to easily calculate a new value for
the bias resistor:
hot trip point is desired.
From the Vishay Curve 1 R-T characteristics, r HOT is 0.2488
at 60°C. Using the above equation, R NOM should be set
to 46.4k. With this value of R NOM , the cold trip point is
about 16°C. Notice that the span is now 44°C rather than
the previous 40°C. This is due to the decrease in “tem-
perature gain” of the thermistor as absolute temperature
increases.
The upper and lower temperature trip points can be inde-
pendently programmed by using an additional bias resistor
as shown in Figure 5. The following formulas can be used
to compute the values of R NOM and R1:
– r
? R 25
2 . 714
R 1 = 0 . 536 ? R NOM – r HOT ? R 25
For example, to set the trip points to 0°C and 45°C with
R NOM =
? 100 k = 104 . 2 k
R NOM =
R NOM =
r HOT
0 . 536
r COLD
3 . 25
? R 25
? R 25
a Vishay Curve 1 thermistor choose
3.266 – 0.4368
2 . 714
4097f
17
相关PDF资料 |
PDF描述 |
|---|---|
| A3BRB-2406M | IDC CABLE - ASR24B/AE24M/APR24B |
| GEM22DRST | CONN EDGECARD 44POS DIP .156 SLD |
| M2MXH-2660K | IDC CABLE - MDM26H/MC26F/X |
| VE-J71-EY-S | CONVERTER MOD DC/DC 12V 50W |
| VE-J70-EZ-F4 | CONVERTER MOD DC/DC 5V 25W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4098 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual-Input Power Manager |
| LTC4098-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual-Input Power Manager |
| LTC4098-3.6 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual-Input Power Manager |
| LTC4098EPDC#PBF | 功能描述:IC CHARGER USB COMP 20-UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:Bat-Track™, PowerPath™ 标准包装:1 系列:- 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:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| LTC4098EPDC#TRPBF | 功能描述:IC CHARGER USB COMP 20-UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:Bat-Track™, PowerPath™ 标准包装:1 系列:- 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:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
发布紧急采购，3分钟左右您将得到回复。