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参数资料
| 型号： | DS2715BZ+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/17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
Figure 3. Ideal Comparator Input and Charge Control Output Waveforms
Not drawn to scale
V Pullup
V CH
V OL
|V FC |
|V sns |
|V sns (DC)|
|V FC + V HYS-FC |
Time
Charge Rate Selection
The charge rate is determined by an external sense resistor connected between the SNS+ and SNS- pins. The
DS2715 will regulate the charge current to maintain a voltage drop of V FC (or V FC + 0.5 x V HYS-FC in comparator
mode) across the sense resistor during FAST-CHARGE. The sense resistor can therefore be selected by:
Linear Mode:
Comparator Mode:
R = |V FC / Desired FAST-CHARGE Current|
R = |(V FC + 0.5 x V HYS-FC ) / Desired FAST-CHARGE Current|
Timeout Selection
The various charge modes employ different timers to ensure reliable and safe charging. PRECHARGE has a fixed
30 minute limit generated by an internal oscillator. A fault is generated if this time limit is exceeded. FAST-
CHARGE mode normally operates until its dT/dt termination scheme activates. In the event that the dT/dt sensing
does not perform correctly, a safety timeout is required. This timeout is set by an external resistor on the Rt pin to
V SS and provides secondary protection against significant overcharging. As such, the value of the Rt resistor
should be chosen so that the timeout is greater than the FAST-CHARGE time expected in the application, but not
so much greater that its protection is compromised. If the timer expires during FAST-CHARGE, the timer count is
reset and charging proceeds to the TOPOFF charge phase. The Rt resistor also sets the timed charge duration of
TOPOFF mode. The TOPOFF time-out period is fixed at half (a quarter for the DS2715B) of the FAST-CHARGE
time-out period. When the timer expires in TOPOFF, the DS2715 enters the DONE state.
Resistors can be selected to support fast-charge time-out periods of 0.5 to 6 hours and TOPOFF charge time-out
periods of 0.25 to 3 hours (0.125 to 1.5 hours for the DS2715B). The programmed FAST-CHARGE time
approximately follows the equation:
t(minutes) = 1.5 x R(ohms) / 1000
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| DS2715Z+T&R | IC NIMH CHARGER 16-SOIC |
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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