BQ2050 Datasheet, PDF (16/21 Pages) Texas Instruments – Lithium Ion Power Gauge™ IC

bq2050
Absolute Maximum Ratings
Symbol
VCC
All other pins
REF
Parameter
Relative to VSS
Relative to VSS
Relative to VSS
VSR
Relative to VSS
TOPR
Operating tempera-
ture
Minimum
-0.3
-0.3
-0.3
-0.3
0
-40
Maximum
7.0
7.0
8.5
7.0
70
85
Unit
Notes
V
V
V Current limited by R1 (see Figure 1)
Minimum 100Ω series resistor should
V
be used to protect SR in case of a
shorted battery (see the bq2050 appli-
cation note for details).
°C Commercial
°C Industrial
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 con-
ditions beyond the operational limits for extended periods of time may affect device reliability.
DC Voltage Thresholds (TA = TOPR; V = 3.0 to 6.5V)
Symbol
Parameter
Minimum Typical Maximum Unit
Notes
VEDVF
VEDV1
VSRO
VSRQ
VSRD
VMCV
Final empty warning
First empty warning
SR sense range
Valid charge
Valid discharge
Maximum single-cell voltage
1.44
1.49
-300
210
-
2.20
1.47
1.52
-
-
-
2.25
1.50
1.55
2000
-
-200
2.30
V SB
V SB
mV SR, VSR + VOS
µV VSR + VOS (see note)
µV VSR + VOS (see note)
V SB
Note:
VOS is affected by PC board layout. Proper layout guidelines should be followed for optimal performance.
See “Layout Considerations.”
16