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参数资料
| 型号： | DS2715BZ+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/17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
Application Circuits
Switchmode
Figure 5 shows a typical DS2715 switchmode application circuit for charging a 3-cell battery stack. Connecting the
MODE pin to CBIAS enables the comparator mode of current regulation. The DS2715 regulates the current
through the current sense resistor R7 by switching Q1 on and off as the sense resistor voltage ramps up and down
toward the preset sense voltage thresholds. The .1ohm sense resistor along with the DC ground-referenced sense
threshold level of -(V FC + V HYS-FC /2) sets the average charge current in the example to 1.07A. The sense resistor
should have a proper power rating for the chosen charge current.
Figure 5. TYPICAL Switchmode APPLICATION CIRCUIT FOR A 3-CELL
STACK
A bootstrap subcircuit with C5, R3 and Q3 is used to improve the turnoff time of Q1 to minimize switching losses.
When V CH is pulled low to turn on Q1, C5 is charged through the R6/R3 path. When V CH is left open-circuit to turn
off Q1, the voltage of the V CH node jumps up close to the gate voltage of Q1. This causes the gate of Q3 to be
pushed up due to the voltage across C5. Q3 is then turned on, which helps to speed turn-off of Q1 by discharging
its internal capacitances. The values of the components in this section of the circuit are tuned to work with the
chosen transistors. The values of R6 and R9 should be chosen so that no more than 20mA is sunk by V CH . D4 is
used to clamp the inductive spike that could occur if the batteries are removed during charging. This function can
also be served by an energy absorbing capacitor placed in parallel with the battery stack.
Q2 is used to float the Rt pin when the supply source is disconnected. This puts the DS2715 into SUSPEND mode
and resets the state machine. D1 prevents current from flowing into the charge source. D2 and R2 create the
maintenance charge current path. D1, D2 and R2 should be sized appropriately for the wattage they must dissipate
based on the application parameters. R1 and C3 create a low pass filter to minimize noise transfer as the DS2715
local ground moves in relation to the system or charge source ground.
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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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