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參數(shù)資料
| 型號(hào)： | bq2014 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC with External Charge Control(氣體Gauge（帶外部電荷控制）) |
| 中文描述： | 氣體計(jì)IC（氣體壓力表與外部充電控制（帶外部電荷控制）） |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 219K |
| 代理商： | BQ2014 |
Functional Description
General Operation
The bq2014 determines battery capacity by monitoring
the amount of charge input to or removed from a re-
chargeable battery. The bq2014 measures discharge and
charge currents, estimates self-discharge, monitors the
battery for low-battery voltage thresholds, and compen-
sates for temperature and charge/discharge rates. The
charge measurement is made by monitoring the voltage
across a small-value series sense resistor between the
battery’s negative terminal and ground. The available
battery charge is determined by monitoring this voltage
over time and correcting the measurement for the envi-
ronmental and operating conditions.
Figure 1 shows a typical battery pack application of the
bq2014 using the LED display capability as a charge-
state indicator. The bq2014 is configured to display ca-
pacity in a relative display mode. The relative display
mode uses the last measured discharge capacity of the
battery as the battery “full” reference.
ments output a percentage of the available charge based
on NAC and LMD.
A push-button display feature is
available for momentarily enabling the LED display.
The LED seg-
The bq2014 monitors the charge and discharge currents
as a voltage across a sense resistor (see R
S
in Figure 1).
A filter between the negative battery terminal and the
SR pin is required.
3
bq2014
Figure 1. Battery Pack Application Diagram—LED Display,
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