参数资料
| 型号： | LTC4095EDC#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION/POLY 8-DFN |
| 标准包装： | 2,500 |
| 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： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（2x2） |
| 包装： | 带卷 (TR) |
LTC4095
APPLICATIONS INFORMATION
Alternate NTC Thermistors and Biasing
The LTC4095 provides temperature quali?ed charging if a
grounded thermistor and a bias resistor are connected to
the NTC pin. By using a bias resistor whose value is equal
to the room temperature resistance of the thermistor (R25)
the upper and lower temperatures are pre-programmed
to approximately 40°C and 0°C, respectively (assuming
a Vishay “Curve 1” thermistor).
The upper and lower temperature thresholds can be ad-
justed by either a modi?cation of the bias resistor value
or by adding a second adjustment resistor to the circuit.
If only the bias resistor is adjusted, then either the upper
or the lower threshold can be modi?ed but not both. The
other trip point will be determined by the characteristics
of the thermistor. Using the bias resistor in addition to an
adjustment resistor, both the upper and the lower tempera-
In the explanation below, the following notation is used.
R25 = Value of the thermistor at 25°C
R NTC|COLD = Value of thermistor at the cold trip point
R NTC|HOT = Value of the thermistor at the hot trip point
r COLD = Ratio of R NTC|COLD to R25
r HOT = Ratio of R NTC|HOT to R25
R NOM = Primary thermistor bias resistor (see Figure 3)
R1 = Optional temperature range adjustment resistor (see
Figure 4)
The trip points for the LTC4095’s temperature quali?ca-
tion are internally programmed at 0.349 ? IN for the hot
threshold and 0.765 ? IN for the cold threshold.
Therefore, the hot trip point is set when:
ture trip points can be independently programmed with
the constraint that the difference between the upper and
lower temperature thresholds cannot decrease. Examples
of each technique are given below.
|
R NTCHOT
|
R NOM + R NTCHOT
? IN = 0 . 349 ? IN
NTC thermistors have temperature characteristics which
and the cold trip point is set when:
are indicated on resistance-temperature conversion tables.
The Vishay-Dale thermistor NTHS0603N011-N1003F, used
in the following examples, has a nominal value of 100k
and follows the Vishay “Curve 1” resistance-temperature
characteristic.
R NTC | COLD
R NOM + R NTC | COLD
? IN = 0 . 765 ? IN
8
IN
LTC4095 NTC BLOCK
8
IN
0.765 ? IN
0.765 ? IN
R NOM
100k
R NTC
100k
6
NTC
(NTC RISING)
TOO_COLD
R NOM
105k
R1
12.7k
6
NTC
(NTC RISING)
TOO_COLD
R NTC
0.349 ? IN
(NTC FALLING)
TOO_HOT
100k
0.349 ? IN
(NTC FALLING)
TOO_HOT
+
NTC_ENABLE
+
NTC_ENABLE
0.017 ? IN
(NTC FALLING)
–
0.017 ? IN
(NTC FALLING)
–
Figure 3. Typical NTC Thermistor Circuit
4095 F03
4095 F04
Figure 4. NTC Thermistor Circuit with Additional Bias Resistor
4095fa
11
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4096XEDD#TRPBF | IC CHARGER LI-ION DL 10-DFN |
| LTC4097EDDB#TRPBF | IC CHARGER LI-ION/POLY 12-DFN |
| LTC4098EUDC#TRPBF | IC CHARGER USB COMP 20-UTQFN |
| LTC4099EUDC#PBF | IC USB PWR MANAGER/CHRGR 20-QFN |
| LTC4100EG#TR | IC CHARGER SMART BATTERY 24-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4096 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
| LTC4096EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
| LTC4096EDD#PBF | 功能描述:IC CHARGER LI-ION DL 10-DFN 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 |
| LTC4096EDD#TRPBF | 功能描述:IC CHARGER LI-ION DL 10-DFN 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 |
| LTC4096X | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Chargers |
发布紧急采购，3分钟左右您将得到回复。