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参数资料
| 型号： | LTC2941IDCB#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC FUEL/GAS GAUGE LI-ION 6DFN |
| 标准包装： | 2,500 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 供应商设备封装： | 6-DFN-EP（2x3） |
| 包装： | 带卷 (TR) |
| 配用： | DC1496A-A-ND - BOARD EVAL LTC2941 |
LTC2941
OPERATION
Overview
The LTC2941 is a battery gas gauge device designed for
use with single Li-Ion cells and other battery types with
a terminal voltage between 2.7V and 5.5V. A precision
coulomb counter integrates current through a sense
resistor between the battery’s positive terminal and the
load or charger.
Coulomb Counter
Charge is the time integral of current. The LTC2941 mea-
sures battery current by monitoring the voltage developed
across a sense resistor and then integrates this information
to infer charge. The differential voltage between SENSE +
and SENSE – is applied to an auto-zeroed differential analog
integrator to convert the measured current to charge.
When the integrator output ramps to REFHI or REFLO
levels, switches S1, S2, S3 and S4 toggle to reverse the
ramp direction. By observing the condition of the switches
and the ramp direction, polarity is determined.
A programmable prescaler is incremented or decremented
every time the integrator changes ramp direction. The
prescaler effectively increases integration time by a factor
M programmable from 1 to 128. At each under or overflow
of the prescaler, the accumulated charge is incremented or
decremented one count. The value of accumulated charge
is read via the I 2 C interface.
Power-Up Sequence
When V SENSE+ rises above a threshold of approximately
2.5V, the LTC2941 generates an internal power-on reset
(POR) signal and sets all registers to their default state.
In the default state, the coulomb counter is active. The
accumulated charge is set to mid-scale (7FFFh), the low
threshold registers are set to 0000h and all the high thresh-
old registers are set to FFFFh. The alert mode is enabled
and the coulomb counter prescaling factor M is set to 128.
STATUS
CHARGER
LOAD
1
SENSE +
V SUPPLY
S1
REFHI
+
–
CONTROL
LOGIC
CONTROL
REGISTERS
AL /CC
5
+
R SENSE
I BAT
BATTERY
6
2
SENSE
GND
–
S2
S3
S4
REFLO
+
–
POLARITY
DETECTION
PRE-
SCALER
M
ACR
THRESHOLDS
I 2 C/
SMBus
SCL
SDA
3
4
2941 F03
Figure 3. Coulomb Counter Section of the LTC2941
2941fa
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2942CDCB#PBF | 制造商:Linear Technology 功能描述:IC, BATTERY GAS GAUGE, LI-ION, DFN-6; Battery Management Function:Fuel Gauge; Battery Type:Li-Ion; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Battery IC Case Style:DFN; No. of Pins:6; IC Interface Type:I2C ;RoHS Compliant: Yes |
| LTC2942CDCB#TRMPBF | 功能描述:IC FUEL/GAS GAUGE LI-ION 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC2942CDCB#TRPBF | 功能描述:IC FUEL/GAS GAUGE LI-ION 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC2942CDCB-1#PBF | 制造商:Linear Technology 功能描述:IC BATTERY FUEL GAUGE LI-ION 5.5V DFN-6 制造商:Linear Technology 功能描述:IC, BATTERY FUEL GAUGE LI-ION 5.5V DFN-6 制造商:Linear Technology 功能描述:IC, BATTERY FUEL GAUGE LI-ION 5.5V DFN-6; Battery Management Function:Fuel Gauge, Charge Controller; Battery Type:Li-Ion; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Battery IC Case Style:DFN; No. of Pins:6 ;RoHS Compliant: Yes |
| LTC2942CDCB-1#TRMPBF | 功能描述:IC FUEL/GAS GAUGE LI-ION 1A 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
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