- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385185 > bq2011 (Benchmark Technology Group) Gas Gauge IC for High Discharge Rates(用于高放電率的氣體Gauge芯片) PDF資料下載
參數(shù)資料
| 型號(hào)： | bq2011 |
| 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） |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 181K |
| 代理商： | BQ2011 |
Gas Gauge Operation
The operational overview diagram in Figure 2 illustrates
the operation of the bq2011. The bq2011 accumulates a
measure of charge and discharge currents, as well as an
estimation of self-discharge. Charge and discharge cur-
rents are temperature and rate compensated, whereas
self-discharge is only temperature compensated.
The main counter, Nominal Available Charge (NAC),
represents the available battery capacity at any given
time.
Battery charging increments the NAC register,
while battery discharging and self-discharge decrement
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.
bq2011 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
CC
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
battery 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
bq2011 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.
5
bq2011
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
+
Compensation
Rate and
Temperature
Temperature Step,
Other Data
+
-
Inputs
Main Counters
and Capacity
Reference (LMD)
Outputs
Serial
Port
Chip-Controlled
Available Charge
LED Display
-
+
Rate and
Temperature
Compensation
Figure 2. Operational Overview
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| bq2012 | Gas Gauge IC With Slow-Charge Control(Gas Gauge芯片（帶慢充電控制）) |
| bq2013H | Gas Gauge IC for Power-Assist Applications(應(yīng)用于電源援助的氣體Gauge芯片) |
| bq2014H | Low-Cost NiCd/NiMH Gas Gauge IC(低價(jià)格NiCd/NiMHGas Gauge芯片) |
| bq2014 | Gas Gauge IC with External Charge Control(氣體Gauge（帶外部電荷控制）) |
| bq2040 | Gas Gauge IC With SMBus Interface(氣體Gauge芯片（帶SMBus 接口）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ2011_05 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC for High Discharge Rates |
| BQ2011JPN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
| BQ2011JPN-N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
| BQ2011JSN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
| BQ2011K | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC for High Discharge Rates |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。