參數(shù)資料
型號： bq2945
廠商： Benchmark Technology Group
英文描述： Gas Gauge IC with SMBus Interface(Gas Gauge芯片（帶SMBus 接口）)
中文描述： 氣體計(jì)IC，帶有SMBus接口（電量監(jiān)測計(jì)芯片（帶的SMBus接口））
文件頁數(shù)： 19/32頁
文件大?。?/td> 256K
代理商： BQ2945
This flag is cleared when the average current falls below
256mA.
The OC values are:
Where OC is:
0
AverageCurrent is less than 1.25
Charg-
ingCurrent or less than 256mA if charging
current is programmed less than 1024mA
1
AverageCurrent exceeds 1.25
Charg-
ingCurrent or 256mA if the charging cur-
rent is programmed less than 1024mA.
This bit is cleared if average current <
256mA.
FLAGS1
Bits 7 and 6 are reserved.
The
Valid Charge
flag (VQ), bit 5, is set when V
SRO
≥
|V
SRD
| and 10mAh of charge has accumulated. This bit
is cleared during a discharge and when V
SRO
≤
|V
SRD
|.
The VQ values are:
Where VQ is:
0
V
SRO
≤
|V
SRD
|
1
V
SRO
≥
|V
SRD
| and 10mAh of charge has
accumulated
Bit 4 is reserved.
The
Valid Discharge
flag (VDQ), bit 3, is set when a
valid discharge is occurring (discharge cycle valid for
learning new full charge capacity) and cleared if a par-
tial charge is detected, EDV1 is asserted when T < 0°C,
or self-discharge accounts for more than 256mAh of the
discharge.
The VDQ values are:
Where VDQ is:
0
Self-discharge is greater than 256mAh,
EDV1 = 1 when T < 0°C or VQ = 1
1
On first discharge after RM=FCC
The
Stop EDV
flag (SEDV), bit 2, is set when the dis-
charge current > 6.15A and cleared when the discharge
current falls below 6.15A.
The SEDV values are:
Where SEDV is:
0
Current < 6.15A
1
Current > 6.15A
The
First End-of-Discharge Voltage
flag (EDV1), bit 1, is
set when Voltage < EDV1 and SEDV = 0 and cleared
when VQ = 1 and Voltage > EDV1.
The EDV1 values are:
Where EDV1 is:
0
VQ = 1 and Voltage > EDV1
1
Voltage < EDV1 and SEDV = 0
The
Final End-of-Discharge Voltage
flag (EDVF), bit 0,
is set when Voltage < EDVF and SEDV = 0 and cleared
when VQ = 1 and Voltage > EDVF.
The EDVF values are:
Where EDVF is:
0
VQ = 1 and Voltage > EDVF
1
Voltage < EDVF and SEDV = 0
Error Codes and Status Bits
Error codes and status bits are listed in Table 8 and Ta-
ble 9,respectively.
19
bq2945
FLAGS1 Bits
4
-
7
-
6
-
5
-
3
-
2
-
1
-
0
EDVF
FLAGS1 Bits
4
-
7
-
6
-
5
-
3
-
2
1
-
0
-
SEDV
FLAGS1 Bits
4
-
7
-
6
-
5
-
3
-
2
-
1
0
-
EDV1
FLAGS1 Bits
4
-
7
-
6
-
5
3
-
2
-
1
-
0
-
VQ
FLAGS1 Bits
4
-
7
-
6
-
5
-
3
2
-
1
-
0
-
VDQ
FLAGS2 Bits
4
-
7
-
6
-
5
-
3
-
2
-
1
-
0
OC
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