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| 型号： | DS2711Z+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/15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
Charge Timer
The charge timer monitors the duration of charge in fast and top-off charge phases, and is reset at the beginning of
each phase. The timeout period is set with an external resistor connected from the TMR pin to V SS . Resistors can
be selected to support fast-charge timeout periods of 0.5 to 10 hours and top-off charge timeout periods of 0.25 to
5 hours. If the timer expires in fast-charge, the timer count is reset and charging proceeds to the top-off charge
phase. The top-off timeout period is half of the fast charge timeout period. If the timer expires in top-off, charging
proceeds to the maintenance phase. The programmed charge time approximately follows the equation:
t = 1.5 x R/1000 (time in minutes)
Suspend
Suspension of charge activity is possible by disconnecting the TMR pin. The CC1 and CC2 outputs become high-Z
and the charge timer stops. The state machine and all timers are reset to their presence test conditions.
Temperature Sense
Connecting an external 10k ? NTC thermistor between THM1 or THM2 (THMx) and V SS , and a 10k ? bias resistor
between V DD and THMx allows the DS2711 to sense temperature. To sense the temperature of the battery cells,
locate the thermistor close to the body of the battery cell so THM1 monitors the temperature of cell-1 and THM2
monitors the temperature of cell-2. Alternatively, the thermistor can sense ambient temperature by locating it away
from the cells. THM1 and THM2 can be connected together to sense temperature using a single thermistor and
bias resistor. The temperature qualification function can be defeated by connecting THM1 and THM2 to a single
resistor-divider supplying a voltage between the Thermistor-Min and Thermistor-Max threshold voltages. Several
recommended 10k ? thermistors are shown in Table 2.
Min, Max Temperature Compare
The voltage thresholds of the THMx inputs (VTHM-MIN, VTHM-MAX) are set to allow fast charging to start if 0 ° C <
T A < 45 ° C when using the recommended 10k ? bias and 10k ? thermistor. If fast charging is in progress, and the
voltage on THMx reaches VTHM-STOP, fast charging stops and the maintenance phase begins.
Table 1. THM1, THM2 Thresholds
THM
THRESHOLD
RATIO OF V DD
THERMISTOR
RESISTANCE
( ? )
TEMPERATURE ( ° C)
Semitec 103AT-2 197-103LAG-A01
Fenwal
173-103LAF-301
MIN
MAX
STOP
0.73
0.33
0.29
27.04k
4.925k
4.085k
0
45
50
4
42
47
Figure 7. Cell Voltage Sense Points
Series Configuration
Charge Source
CC1
VP2
Parallel Configuration
Charge Source
CC2
Vcell2
CC1
VP1
VP2
VP1
Vcell1
VN1
VN0
10 of 15
Vcell1
VN1
VN0
Vcell2
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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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