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參數(shù)資料
| 型號： | bq2014H |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Low-Cost NiCd/NiMH Gas Gauge IC(低價格NiCd/NiMHGas Gauge芯片) |
| 中文描述： | 低成本鎳鎘/鎳氫電池電量監(jiān)測計芯片（低價格鎳鎘/ NiMHGas計芯片） |
| 文件頁數(shù)： | 3/22頁 |
| 文件大?。?/td> | 185K |
| 代理商： | BQ2014H |
Functional Description
General Operation
The bq2014H determines battery capacity by moni-
toring the amount of current input to or removed
from a rechargeable battery.
sures discharge and charge currents, measures bat-
tery voltage, estimates self-discharge, monitors the
battery for low battery-voltage thresholds, and com-
pensates for temperature and charge/discharge rate.
Current measurement is made by monitoring the
voltage across a small-value series sense resistor be-
tween the negative battery terminal and ground.
The bq2014H compensates the nominal available
capacity register for discharge rate and tempera-
ture and reports the compensated available
capacity. The bq2014H uses the compensated available
The bq2014H mea-
capacity to drive the LED display. In addition, the
bq2014H estimates the available energy using the aver-
age battery voltage during the discharge cycle and re-
maining compensated available capacity.
Figure 1 shows a typical battery pack application of the
bq2014H using the LED display capability as a charge-
state indicator.
The bq2014H is configured to display
capacity in relative display mode. The relative display
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 bq2014H 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 is required.
3
F2014HBP.eps
DONE
SEG5/PROG5
SEG4/PROG4
SEG3/PROG3
SEG2/PROG2
SEG1/PROG1
SR
DISP
SB
VCC
REF
bq2014H
Gas-Gauge IC
LCOM
VSS
RBI
HDQ
VCC
100K
0.1
μ
F
C1
Q1
ZVNL110A
RS
1M
RB1
R1
RB2
See note 4
Load
Charger
1. Indicates optional.
2. Programming resistors (5 max.) and ESD-protection diodes are not shown.
3. RC on SR is required.
4. A series diode is required on RBI if the bottom series cell is used as the backup source.
If the cell is used, the backup capacitor is not required, and the anode is connected to the
positive terminal of the cell.
VCC
C2
Notes:
Figure 1. Battery Pack Application Diagram—LED Display
Preliminary
bq2014H
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| BQ2014HSNTR | 功能描述:電池管理 NiCd/NiMH Gas Gauge RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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