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参数资料
| 型号： | DS2715BZ+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/17页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR CHRG NIMH BATT 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 镍金属氢化物 |
| 电源电压： | 4.5 V ~ 16 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
DS2715: NiMH Battery Pack Charge Controller
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 3.
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 the thermistor
temperature is between 0 ? C and 45 ? C when using the recommended 10k ? bias resistor and 10k ? thermistor
circuit. 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 TOPOFF, charging
stops and the DS2715 enters the DONE state. FAST_CHARGE will complete normally and TOPOFF will begin if
the voltage change on THM exceeds the equivalent T TERM oC per minute (dT/dt Detect specification).
Table 3. THM THRESHOLDS
THM
THRESHOLD
MIN
MAX
STOP
RATIO
OF V CBIAS
0.73
0.33
0.29
THERMISTOR
RESISTANCE
( ? )
27.04k
4.925k
4.085k
Semitec
103AT-2
0 ? C
45 ? C
50 ? C
TEMPERATURE ( ? C)
Fenwal
197-103LAG-A01
173-103LAF-301
4 ? C
42 ? C
47 ? 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
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0
10
20
30
40
50
Degrees Centigrade
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| DS2715KLINEAR+ | 制造商:Maxim Integrated Products 功能描述:DS2715 LINEAR EVAL KIT - Boxed Product (Development Kits) |
| DS2715KSWITCH | 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 |
| DS2715KSWITCH+ | 制造商:Maxim Integrated Products 功能描述:EVALUATION KIT FOR THE DS2715 - Boxed Product (Development Kits) |
| DS2715Z | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:NiMH Battery Pack Charge Controller |
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