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参数资料
| 型号： | DC1496A-A |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTC2941 |
| 软件下载： | QuikEval System |
| 设计资源： | DC1496A Design Files DC1496A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™ |
| 主要目的： | 电源管理，电池监控器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LTC2941 |
| 主要属性： | I²C、SMBus 接口 |
| 次要属性： | LED 状态指示器 |
| 已供物品： | 板，线缆 |
| 相关产品： | DC590B-ND - BOARD DEMO USB SERIAL CONTROLLER LTC2941IDCB-1#TRMPBFDKR-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941IDCB-1#TRMPBFCT-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941IDCB-1#TRPBF-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941IDCB-1#TRMPBFTR-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941CDCB-1#TRPBF-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941CDCB-1#TRMPBFDKR-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941CDCB-1#TRMPBFCT-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941CDCB-1#TRMPBFTR-ND - IC FUEL/GAS GAUGE LI-ION 1A 6DFN LTC2941IDCB#TRMPBF-ND - IC FUEL/GAS GAUGE LI-ION 6DFN 更多... |
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 |
|---|---|
| DC1496A-B | 功能描述:BOARD EVAL LTC2942 RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:QuikEval™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| DC1496B-A | 制造商:Linear Technology 功能描述:BOARD EVAL LTC2941 制造商:Linear Technology 功能描述:LTC2941 BATTERY GAS GAUGE EV 制造商:Linear Technology 功能描述:DEMO BOARD, LTC2941IDCB BATTERY GAS GAUGE; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2941; Kit Application Type:Power Management; Application Sub Type:Fuel Gauge; Kit Contents:Demo Board LTC2941 |
| DC1496B-B | 功能描述:BOARD EVAL LTC2942 RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:QuikEval™ 标准包装:1 系列:- 主要目的:数字电位器 嵌入式:- 已用 IC / 零件:AD5258 主要属性:- 次要属性:- 已供物品:板 相关产品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP |
| DC1496B-B | 制造商:Linear Technology 功能描述:EVAL BOARD, LTC2942 BATTERY FUEL GAUGE |
| DC1496B-C | 制造商:Linear Technology 功能描述:BOARD EVAL FOR LTC2941-1 制造商:Linear Technology 功能描述:LTC2941-1 BATTERY GAS GAUGE 制造商:Linear Technology 功能描述:DEMO BOARD, LTC2941IDCB-1 BATTERY GAS GAUGE; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2941; Kit Application Type:Power Management; Application Sub Type:Fuel Gauge; Kit Contents:Demo Board LTC2941 |
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