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參數(shù)資料
| 型號(hào)： | 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(jì)IC，高放電率（用于高放電率的氣體計(jì)芯片） |
| 文件頁(yè)數(shù)： | 5/20頁(yè) |
| 文件大?。?/td> | 175K |
| 代理商： | BQ2011K |
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the NAC register and increment the DCR (Discharge
Count Register).
The Discharge Count Register (DCR) is used to update
the Last Measured Discharge (LMD) register only if a
complete battery discharge from full to empty occurs
without any partial battery charges.
bq2011K adapts its capacity determination based on the
actual conditions of discharge.
Therefore, the
The battery’s initial capacity is equal to the Pro-
grammed Full Count (PFC) shown in Table 1.
LMD is updated, NAC counts up to but not beyond this
threshold during subsequent charges. This approach al-
lows the gas gauge to be charger-independent and com-
patible with any type of charge regime.
Until
1.
Last Measured Discharge (LMD) or learned
battery capacity:
LMD is the last measured discharge capacity of the
battery. On initialization (application of V
or bat-
tery replacement), LMD = PFC. During subsequent
discharges, the LMD is updated with the latest
measured capacity in the Discharge Count Register
(DCR) representing a discharge from full to below
EDV. A qualified discharge is necessary for a ca-
pacity transfer from the DCR to the LMD register.
The LMD also serves as the 100% reference thresh-
old used by the relative display mode.
2.
Programmed Full Count (PFC) or initial bat-
tery capacity:
The initial LMD and gas gauge rate values are pro-
grammed by using PFC. The PFC also provides the
100% reference for the absolute display mode. The
bq2011K is configured for a given application by se-
lecting a PFC value from Table 1. The correct PFC
may be determined by multiplying the rated bat-
tery capacity in mAh by the sense resistor value:
Battery capacity (mAh)*sense resistor (
) =
PFC (mVh)
Selecting a PFC slightly less than the rated capac-
ity for absolute mode provides capacity above the
full reference for much of the battery’s life.
Example: Selecting a PFC Value
Given:
Sense resistor = 0.002
Number of cells = 6
Capacity = 1800mAh,NiCd cells
Current range = 1A to 80A
Absolute display mode
Self-discharge =
C80
Voltage drop across sense resistor = 2mV to 160mV
5
bq2011K
FG201104.eps
Temperature
Compensation
Charge
Current
Discharge
Current
Self-Discharge
Timer
Temperature
Translation
Nominal
Available
Charge
(NAC)
Last
Measured
Discharged
(LMD)
Discharge
Count
Register
(DCR)
<
Qualified
Transfer
+
TRate and
Compensation
Temperature
Temperature Step,
Other Data
+
-
Inputs
Main Counters
and Capacity
Reference (LMD)
Outputs
Serial
Port
Chip-Controlled
Available Charge
LED Display
-
+
Figure 2. Operational Overview
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| bq2011 | Gas Gauge IC for High Discharge Rates(用于高放電率的氣體Gauge芯片) |
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相關(guān)代理商/技術(shù)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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