- 您现在的位置：买卖IC网 > PDF目录1834 > LTC4160EUDC-1#TRPBF (Linear Technology)IC SWITCH POWER MANAGER 20-QFN PDF资料下载
参数资料
| 型号： | LTC4160EUDC-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 24/32页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH POWER MANAGER 20-QFN |
| 标准包装： | 2,500 |
| 系列： | Bat-Track™, PowerPath™ |
| 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： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（3x4） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页
LTC4160/LTC4160-1
APPLICATIONS INFORMATION
R NOM + R NTCHOT
R NOM + R NTC COLD
R NOM = HOT ? R 25
R NOM =
r COLD – r HOT
R NOM =
? 100 k = 104 . 2 k
NTCBIAS
R NOM
–
+
Therefore,thehottrippointissetwhen:
R NTCHOT
? NTCBIAS = 0 . 349 ? NTCBIAS
And the cold trip point is set when:
R NTC COLD
? NTCBIAS = 0 . 765 ? NTCBIAS
Solving these equations for R NTC|COLD and R NTC|HOT results
in the following:
R NTC|HOT = 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
direction. The temperature span will change somewhat
due to the non-linear behavior of the thermistor. The fol-
lowing equations can be used to calculate a new value for
the bias resistor:
r
0 . 536
be set to 46.4k. With this value of R NOM , r COLD is 1.436
and 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 “temperature 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,
R1, as shown in Figure 8. The following formulas can be
used to compute the values of R NOM and R1:
? 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
a Vishay Curve 1 thermistor choose:
3 . 266 – 0 . 4368
2 . 714
the nearest 1% value is 105k:
R1 = 0.536 ? 105k – 0.4368 ? 100k = 12.6k
the nearest 1% value is 12.7k. The final solution is shown
in Figure 8 and results in an upper trip point of 45°C and
a lower trip point of 0°C.
LTC4160/LTC4160-1
3 NTC BLOCK
0.765 ? NTCBIAS
100k
TOO_COLD
NTC
4
R NOM = COLD ? R 25
r
3 . 25
where r HOT and r COLD are the resistance ratios at the de-
sired 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
hot trip point is desired.
T
R NTC
100k
0.349 ? NTCBIAS
0.1V
–
+
+
–
TOO_HOT
NTC_ENABLE
From the Vishay Curve 1 R-T characteristics, r HOT is
0.2488 at 60°C. Using the above equation, R NOM should
Figure 7. Standard NTC Configuration
41601 F07
41601fa
24
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4410ES6#TRPBF | IC POWER MANAGER USB TSOT23-6 |
| LTC4411ES5#TRMPBF | IC IDEAL DIODE LOW LOSS TSOT23-5 |
| LTC4412IS6#TRMPBF | IC PWR PATH CNTRLR TSOT23-6 |
| LTC4413EDD-1#PBF | IC IDEAL DIODE DUAL 10-DFN |
| LTC4413EDD#PBF | IC IDEAL DIODE DUAL 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4210 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Supply Hot Swap Controller for Advanced Mezzanine Card |
| LTC4210-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC42101CS6 | 制造商:Linear Technology 功能描述: |
| LTC4210-1CS6 | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23 |
| LTC4210-1CS6#PBF | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23 制造商:Linear Technology 功能描述:IC HOT SWAP CONT 制造商:Linear Technology 功能描述:HOT SWAP CNTRL 16.5VIN 6SOT23 制造商:Linear Technology 功能描述:HOT SWAP, CNTRL, 16.5VIN, 6SOT23 制造商:Linear Technology 功能描述:IC, HOT SWAP CONT; Controller Applications:Hot Board Insertion, Electronic Circuit Breaker, Industrial High Side Switch; Input Voltage:16.5V; Internal Switch:Yes; Supply Voltage Min:2.7V; Supply Voltage Max:16.5V; No. of Pins:6 ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。