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參數(shù)資料
| 型號： | bq2012 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC With Slow-Charge Control(Gas Gauge芯片（帶慢充電控制）) |
| 中文描述： | 氣體計IC緩慢充電控制（電量監(jiān)測計芯片（帶慢充電控制）） |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 188K |
| 代理商： | BQ2012 |
of the battery from full to empty.
bq2012 updates the capacity of the battery. LMD is set
to PFC during a bq2012 reset.
In this way the
Secondary Status Flags Register (FLGS2)
The read-only FLGS2 register (address=06h) contains
the secondary bq2012 flags.
The
charge rate
flag (CR) is used to denote the fast
charge regime.
Fast charge is assumed whenever a
charge action is initiated. The CR flag remains asserted
if the charge rate does not fall below 2 counts/sec.
The CR values are:
Where CR is:
0
When charge rate falls below 2 counts/sec
1
When charge rate is above 2 counts/sec
The fast charge regime efficiency factors are used when
CR = 1. When CR = 0, the trickle charge efficiency fac-
tors are used. The time to change CR varies due to the
user-selectable count rates.
The
discharge rate
flags,DR2–0,are bits 6–4.
They are used to determine the current discharge re-
gime as follows:
The
overload
flag (OVLD) is asserted when a discharge
overload is detected, V
SR
< -250mV. OVLD remains as-
serted as long as the condition persists and is cleared
when V
SR
> -250mV. The overload condition is used to
stop sampling of the battery terminal characteristics for
end-of-discharge determination. Sampling is re-enabled
0.5 secs after the overload condition is removed.
DR2–0 and OVLD are set based on the measurement of the
voltage at the SR pin relative to V
SS
. The rate at which
this measurement is made varies with device activity.
Program Pin Pull-Down Register (PPD)
The read-only PPD register (address=07h) contains some of
the programming pin information for the bq2012. The seg-
ment drivers, SEG
1–6
, have a corresponding PPD register
location, PPD
1–6
. A given location is set if a pull-down re-
sistor has been detected on its corresponding segment
driver. For example, if SEG
1
and SEG
4
have pull-down
resistors,the contents of PPD are xx001001.
Program Pin Pull-Up Register (PPU)
The read-only PPU register (address=08h) contains the
rest of the programming pin information for the
bq2012.
The segment drivers, SEG
1–6
, have a corre-
sponding PPU register location, PPU
1–6
. A given loca-
tion is set if a pull-up resistor has been detected on its cor-
responding segment driver.
SEG
6
have pull-up resistors, the contents of PPU are
xx100100.
For example, if SEG
3
and
Capacity Inaccurate Count Register (CPI)
The read-only CPI register (address=09h) is used to in-
dicate the number of times a battery has been charged
without an LMD update. Because the capacity of a re-
chargeable battery varies with age and operating condi-
tions, the bq2012 adapts to the changing capacity over
time.
A complete discharge from full (NAC=LMD) to
empty (EDV1=1) is required to perform an LMD update
assuming there have been no intervening valid charges,
the temperature is greater than or equal to 0°C, and the
self-discharge counter is less than 4096 counts.
The CPI register is incremented every time a valid
charge is detected if NAC < 0.94*LMD. When NAC
≥
0.94*LMD, the CPI register increments on the first
valid charge; CPI does not increment again for a valid
charge until NAC is discharged below 0.94*LMD. This
prevents continuous trickle charging from incrementing
CPI if self-discharge decrements NAC. The CPI register
increments to 255 without rolling over. When the con-
tents of CPI are incremented to 64, the capacity inaccu-
rate flag, CI, is asserted in the FLGS1 register. The CPI
register is reset whenever an update of the LMD regis-
ter is performed,and the CI flag is also cleared.
14
bq2012
FLGS2 Bits
4
-
7
-
6
-
5
-
3
-
2
-
1
-
0
OVLD
PPD/PPU Bits
8
7
6
5
4
3
2
1
-
-
-
-
PPU
6
PPU
5
PPU
4
PPU
3
PPU
2
PPU
1
PPD
6
PPD
5
PPD
4
PPD
3
PPD
2
PPD
1
FLGS2 Bits
4
-
7
6
-
5
-
3
-
2
-
1
-
0
-
CR
FLGS2 Bits
4
DR1
7
-
6
5
3
-
2
-
1
-
0
DR2
DR0
DR2
0
0
DR1
0
0
DR0
0
1
V
SR
(V)
V
SR
> -150mV
V
SR
< -150mV
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BQ2-012 | 制造商:SMC Corporation of America 功能描述:Adapter Plate to mount D-M9 autoswitches to NCQ2 series cylinders 制造商:SMC 功能描述:Supporto per sensore per CQ2 |
| BQ2012PN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
| BQ2012PN-N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Battery Management |
| BQ2012SN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC With Slow-Charge Control |
| BQ2012SN-D107 | 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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