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参数资料
| 型号： | DS2715 |
| 英文描述： | NiMH Battery Pack Charge Controller |
| 中文描述： | NiMH电池组充电控制器 |
| 文件页数： | 11/12页 |
| 文件大小： | 202K |
| 代理商： | DS2715 |
DS2715: NiMH Cell Pack Charge Controller
11 of 12
TEMPERATURE SENSE
Accurate temperature sensing is needed to determine end of charge by dT/dt and to detect over temperature fault
conditions. Connecting an external 10k NTC thermistor between THM and V
SS
, and a 10k bias resistor between
Div and THM allows the DS2715 to sense temperature. To sense the temperature of the cell pack, locate the
thermistor close to the body of a cell, preferably in the middle of the cell pack. Several recommended 10k
thermistors are shown in Table 2.
Min, Max Temperature Compare
The voltage thresholds of the THM input (V
THM-MIN
, V
THM-MAX
) are set to allow charging to start if 0 C < T
CELL
< 45 C
when using the recommended 10k bias and 10k thermistor. If pre-charging is in progress, and the voltage on
THM reaches V
THM-STOP
, pre-charging stops and a fault condition is generated. If the voltage on THM reaches V
THM-
STOP
during fast charge or top-off, charging stops and the DS2715 enters the DONE state. Fast charging will
complete normally and top-off will begin if the voltage change on THM exceeds T
TERM
oC per minute (dT/dt charge
termination).
Table 2. THM1, THM2 THRESHOLDS
TEMPERATURE ( C)
THM
THRESHOLD
RATIO
OF V
CBIAS
THERMISTOR
RESISTANCE
( )
Semitec
103AT-2
Fenwal
197-103LAG-A01
173-103LAF-301
4 C
42 C
47 C
MIN
MAX
STOP
0.73
0.33
0.29
27.04k
4.925k
4.085k
0 C
45 C
50 C
Used with a 10k resistor the Semitec 103AT-2 provides about 0.9% full scale per degree sensitivity. This linearity is
shown in the curve in Figure 4. The left axis is the ratio of the sensed voltage to the divider’s input voltage (V
Cbias
).
Figure 4. RATIO OF THM PIN TO CBIAS PIN OVER TEMPERATURE
Divider Output
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0
10
20
30
40
50
Degrees Centigrade
V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2715BZ+ | 功能描述:电池管理 NiMH Battery Pack Charge Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2715BZ+T&R | 制造商:Maxim Integrated Products 功能描述:NIMH BATPCK CHGCONT 16PIN SOIC TR L - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTRLR CHRG NIMH BATT 16-SOIC 制造商:Maxim Integrated Products 功能描述:Battery Management NiMH Battery Pack Charge Controller |
| DS2715BZ+T&R | 功能描述:电池管理 NiMH Battery Pack Charge Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2715BZ+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:NiMH Battery Pack Charge Controller |
| DS2715KLINEAR | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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