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參數(shù)資料
| 型號(hào)： | bq2052 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC for Lithium Primary Cells(Gas Gauge 芯片（用于鋰電池）) |
| 中文描述： | 氣體計(jì)IC（電量監(jiān)測(cè)計(jì)芯片（用于鋰電池），鋰原電池） |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 161K |
| 代理商： | BQ2052 |
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On initialization with PROG6=L, the bq2052 sets the
registers as
FNAC = 0x00
CACH = 0x00
CACL = 0x00
RCAC = 0x00
FLGS1 = 0x10
Layout Considerations
The bq2052 measures the voltage differential between
the SR and V
SS
pins. V
OS
(the offset voltage at the SR
pin) is greatly affected by PC board layout. For optimal
results, the PC board layout should follow the strict rule
of a single-point ground return. Sharing high-current
ground with small signal ground causes undesirable
noise on the small signal nodes.
13
Preliminary
bq2052
DC Voltage Thresholds
(TA= TOPR; V = 3.0 to 6.5V)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Notes
V
EDV1
First empty warning
0.73
0.76
0.79
V
SB, default
V
EDVF
Final empty warning
-
V
EDV1
- 0.10
-
V
SB, default
V
SRO
SR sense range
-300
-
+500
mV
SR, V
SR
+ V
OS
V
SRD
Valid discharge
-
-
-250
μ
V
V
SR
+ V
OS
(see note)
Note:
V
OS
is affected by PC board layout. Proper layout guidelines should be followed for optimal performance.
See “Layout Considerations.”
Absolute Maximum Ratings
Symbol
Parameter
Minimum
Maximum
Unit
Notes
V
CC
Relative to V
SS
-0.3
+7.0
V
All other pins
Relative to V
SS
-0.3
+7.0
V
REF
Relative to V
SS
-0.3
+8.5
V
Current limited by R1 (see Figure 1)
V
SR
Relative to V
SS
-0.3
Vcc+0.7
V
Recommended 100K
series resistor
should be used to protect SR in case
of a shorted battery.
T
OPR
Operating temperature
-20
+70
°C
Commercial
Note:
Permanent device damage may occur if
Absolute Maximum Ratings
are exceeded. Functional
operation should be limited to the Recommended DC Operating Conditions detailed in this data sheet.
Exposure to conditions beyond the operational limits for extended periods of time may affect device reli-
ability.
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