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參數(shù)資料
| 型號： | bq2011K |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC for High Discharge Rates(用于高放電率的氣體Gauge芯片) |
| 中文描述： | 氣體計IC，高放電率（用于高放電率的氣體計芯片） |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 175K |
| 代理商： | BQ2011K |
Functional Description
General Operation
The bq2011K determines battery capacity by monitoring
the amount of charge input to or removed from a recharge-
able battery. The bq2011K measures discharge and charge
currents, estimates self-discharge, monitors the battery for
low-battery voltage thresholds, and compensates for tem-
perature and charge/discharge rates. The charge measure-
ment 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 de-
termined by monitoring this voltage over time and correct-
ing the measurement for the environmental and operating
conditions.
Figure 1 shows a typical battery pack application of the
bq2011K using the LED display with absolute mode as a
charge-state indicator. The absolute display mode uses
the programmed full count (PFC) as the full reference,
forcing each segment of the display to represent a fixed
amount of charge.
A push-button display feature is
available for momentarily enabling the LED display.
The bq2011K monitors the charge and discharge cur-
rents as a voltage across a sense resistor (see R
S
in Fig-
ure 1). A filter between the negative battery terminal
and the SR pin may be required if the rate of change of
the battery current is too great.
Register Backup
The bq2011K RBI input pin is intended to be used with
a storage capacitor to provide backup potential to the in-
3
bq2011K
FG201103.eps
SPFC
SEG5
SEG4/PROG4
SEG3/PROG3
SEG2/PROG2
SEG1/PROG1
VSS
DISP
SB
VCC
REF
bq2011K
Gas Gauge IC
LCOM
SR
RBI
DQ
VCC
C1
0.1 F
Q1
ZVNL110A
R1
RS
RB1
RB2
Load
Charger
Indicates optional.
Directly connect to VCC across 4 cells (4.8V nominal and should not
exceed 6.5V) with a resistor and a Zener diode to limit voltage during charge.
Otherwise, R1, C1, and Q1 are needed for regulation of >4 cells.
Programming resistors and ESD-protection diodes are not shown.
R-C on SR may be required (application-specific), where the maximum R should not exceed 20K.
Figure 1. Application Diagram: LED Display, Absolute Mode
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BQ2011KSN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Battery Management |
| BQ2011KSN- | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC for High Discharge Rates |
| BQ2011KSN-D121 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| BQ2011KSN-N | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC for High Discharge Rates |
| BQ2011PN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
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