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參數(shù)資料
| 型號： | bq2050 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Lithium Ion Power Gauge IC(鋰離子電源Gause 芯片) |
| 中文描述： | 鋰離子動力計IC（鋰離子電源高斯芯片） |
| 文件頁數(shù)： | 3/21頁 |
| 文件大小： | 235K |
| 代理商： | BQ2050 |
Functional Description
General Operation
The bq2050 determines battery capacity by monitor-
ing the amount of current input to or removed from a
rechargeable battery.
The bq2050 measures dis-
charge and charge currents, measures battery volt-
age, estimates self-discharge, monitors the battery
for low battery voltage thresholds, and compensates
for temperature and charge/discharge rates. The cur-
rent measurement is made by monitoring the voltage
across a small-value series sense resistor between the
negative battery terminal and ground. The estimate of
scaled available energy is made using the remaining
average battery voltage during the discharge cycle
and the remaining nominal available charge. The
scaled available energy measurement is corrected for
the environmental and operating conditions.
Figure 1 shows a typical battery pack application of the
bq2050 using the LED display capability as a charge-
state indicator. The bq2050 is configured to display ca-
pacity in relative display mode.
mode uses the last measured discharge capacity of the
battery as the battery “full” reference. A push-button
display feature is available for momentarily enabling
the LED display.
The relative display
The bq2050 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 may be required if the rate of change of the bat-
tery current is too great.
3
bq2050
FG205001.eps
PROG6
SEG5/PROG5
SEG4/PROG4
SEG3/PROG3
SEG2/PROG2
SEG1/PROG1
SR
DISP
SB
VCC
REF
bq2050
Power Gauge IC
LCOM
VSS
RBI
DQ
VCC
C1
0.1 F
Q1
ZVNL110A
R1
RS
RB1
RB2
Load
Charger
Indicates optional.
Directly connect to VCC across 1 cell (VBAT > 3V).
Otherwise, R1, C1, and Q1 are needed for regulation of > 1 cell.
Programming resistors (6 max.) and ESD-protection diodes are not shown.
R-C on SR may be required, application-specific.
A series Zener may be used to limit discharge current at low voltages
in designs using 3 or more cells.
VCC
C2
1M
PSTAT
Figure 1. Battery Pack Application Diagram
—
LED Display
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BQ2050H | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost Lithium Ion Power Gauge IC |
| bq2050hevm | 制造商:Texas Instruments 功能描述: |
| BQ2050HEVM-002 | 功能描述:電源管理IC開發(fā)工具 BQ2050H Eval Kit for Li-Ion 10.8V RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| BQ2050HSN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost Lithium Ion Power Gauge IC |
| BQ2050HSN-A308 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost Lithium Ion Power Gauge IC |
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