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參數(shù)資料
| 型號： | bq2040 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC With SMBus Interface(氣體Gauge芯片（帶SMBus 接口）) |
| 中文描述： | 氣體計IC，帶有SMBus接口（氣體計芯片（帶的SMBus接口）） |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 189K |
| 代理商： | BQ2040 |
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End of Discharge Voltage1 (0x3e)
This read-only word returns the first end-of-discharge
voltage programmed for the pack.
Output:
Returns battery end-of-discharge voltage pro-
grammed in EEPROM in mV.
two’s complemented unsigned integer.
End of Discharge VoltageF (0x3f)
This read-only word returns the final end-of-discharge
voltage programmed for the pack.
Output:
Returns battery final end-of-discharge voltage pro-
grammed in EEPROM in mV.
two’s complemented unsigned integer.
FLAGS1&2() (0x2f)
This read-only register returns an unsigned integer rep-
resenting the internal status registers of the bq2040.
The MSB represents FLAGS2, and the LSB represents
FLAGS1. See Table 6 for the bit description for FLAGS1
and FLAGS2.
FLAGS2
The
Display Mode
flag (DMODE), bit 7 determines
whether the bq2040 displays Relative or Absolute capac-
ity.
The DMODE value is:
Where DMODE is:
0
Selects Absolute display
1
Selects Relative display
Bit 6 reflects the high/low state of PSTAT. PSTAT
≥
1.5V
generates a charge suspend condition.
The PSTAT value is:
Where PSTAT is:
0
PSTAT input < 1.0V
1
PSTAT input
≥
1.5V
The
Chemistry
flag (CHM), bit 5, selects Li-Ion or nickel
compensation factors.
The CHM value is:
Where CHM is:
0
Selects Nickel
1
Selects Li-Ion
Bit 4, the
Charge Control
flag (CC), determines whether
a bq2040-based charge termination will set RM to a
user-defined programmable full charge capacity.
The CC value is:
Where CC is:
0
RM is not modified on valid bq2040
charge termination
1
RM is set to a programmable percentage of
the FCC when a valid bq2040 charge termi-
nation occurs
Bit 3 is reserved.
Bit 2, the
Overvoltage
flag (OV), is set when the bq2040
detects a pack voltage 5% greater than the programmed
charging voltage. This bit is cleared when the pack volt-
age falls 5% below the programmed charging voltage.
The OV value is:
Where OV is:
0
Voltage < 1.05
ChargingVoltage
1
Voltage
≥
1.05
ChargingVoltage
Bit 1, the
Low Temperature Fault
flag (LTF), is set when
Temperature is < 12°C and cleared when Temperature
is
≥
15°C.
The LTF value is:
18
bq2040
FLAGS2 Bits
4
-
7
-
6
-
5
-
3
-
2
1
-
0
-
OV
FLAGS2 Bits
4
CC
7
-
6
-
5
-
3
-
2
-
1
-
0
-
FLAGS2 Bits
4
-
7
6
-
5
-
3
-
2
-
1
-
0
-
DMODE
FLAGS2 Bits
4
-
7
-
6
-
5
3
-
2
-
1
-
0
-
CHM
FLAGS2 Bits
4
-
7
-
6
-
5
-
3
-
2
-
1
0
-
LTF
FLAGS2 Bits
4
-
7
-
6
5
-
3
-
2
-
1
-
0
-
PSTAT
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