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参数资料
| 型号： | DS2711Z+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/15页 |
| 文件大小： | 0K |
| 描述： | IC NIMH CHARGER 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 镍金属氢化物 |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | -20°C ~ 70°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： | 管件 |
DS2711/DS2712: Loose-Cell NiMH Chargers
DETAILED DESCRIPTION
Charge Algorithm Overview
A charge cycle begins in one of three ways: with the application of power to the DS2711 with cell(s) already
inserted, with the detection of cell insertion after power-up, or when exiting suspend mode with cell(s) inserted. The
charge cycle begins with precharge qualification to prevent fast charging of deeply depleted cells or charging under
extreme temperature conditions. Precharging is performed at a reduced rate until each cell reaches 1V. The
algorithm proceeds to a fast-charge phase, which includes cell tests to avoid accidental charging of alkaline cells or
NiMH cells that are worn-out or damaged. Fast charging continues as long as the cell temperature(s) are less than
50 ° C (based on THM1, THM2 voltages) and the open-circuit cell voltage(s) are between 1.0V and 1.75V. Fast
charging terminates by the - ? V (negative delta voltage) method. The top-off charge phase follows to completely
charge the cells. After the top-off charge timer expires, the maintenance charge phase continues indefinitely to
keep the cells at a full state of charge. Maximum voltage, temperature, and charge-time monitoring during all
charge phases act as secondary or safety termination methods to provide additional protection from overcharge.
Each cell is monitored independently, and in parallel mode the charge phase of each cell is independently
controlled.
Series Charge Configuration
The DS2711/DS2712 series configuration supports one or two-slot stand-alone and one or two cell in-system
chargers. The single-cell-series mode charges one cell while the two-cell-series mode charges two series cells.
Since the cells are charged in series, cell sizes should not be mixed in the series configuration. In the application
example in Figure 3, charge current is gated to the battery cells by a PNP transistor under the control of the CC1
pin of the DS2711. Current regulation is performed outside of this example schematic using the current-sense
feedback provided by the DS2711 CSOUT pin. The DS2712 can also be used in this circuit to provide switch-mode
control on the CSOUT pin. RSNS = 0.125 ? sets the charge source current, ICHG, to 1A. In series mode, the
effective charge current is 0.969 x ICHG = 969mA.
Figure 3. Series Configuration with External Current Regulation
ICHG
FCX718
+5V
10K
270
100
DS2711/12
CC1 VP2
VP1
CC2
LED1
THM2
0.1
10K
x2
VSS
THM1
LED2
VDD
103AT-2
x2
IFB
CSOUT
VN1
VN0
TMR
CTST
DMSEL
75K
100K
RSNS
GND
0.125
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2711Z/T&R | 制造商:Maxim Integrated Products 功能描述:LOOSE CELL NIMH CHARG.SOIC16 PIN TR - Tape and Reel |
| DS2711Z/T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Loose Cell NiMH Chargers |
| DS2711Z/TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Loose Cell NiMH Chargers |
| DS2711Z+ | 功能描述:电池管理 Loose Cell NiMH Chargers 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 |
| DS2711Z+T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Loose-Cell NiMH Chargers Detect and Avoid Charging Alkaline Cells |
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