BQ2014H Datasheet, PDF (17/22 Pages) Texas Instruments – Low-Cost NiCd/NiMH Gas Gauge IC

Preliminary bq2014H
Absolute Maximum Ratings
Symbol
Parameter
Minimum Maximum Unit
Notes
VCC
All other pins
REF
Relative to VSS
Relative to VSS
Relative to VSS
V_SR
Relative to V_SS
-0.3
+7.0
V
-0.3
+7.0
V
-0.3
+8.5
V Current limited by R1 (see Figure 1)
-0.3
Vcc+0.7
V
100kΩ series resistor should be used to
protect SR in case of a shorted battery.
T_OPR
Operating temperature
0
+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.
DC Voltage Thresholds (TA = TOPR; V = 3.0 to 6.5V)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Notes
V_EDV1
V_EDVF
V_SRO
V_SRQ
V_SRD
First empty warning
Final empty warning
SR sense range
Valid charge
Valid discharge
0.73
0.76
0.79
V SB, default
V_EDV1 - 0.035 V_EDV1 - 0.025 V_EDV1 - 0.015 V SB, default
-300
-
+500
mV SR, V_SR + V_OS
250
-
-
µV VSR + VOS (see note)
-
-
-250
µV VSR + VOS (see note)
Note:
VOS is affected by PC board layout. Proper layout guidelines should be followed for optimal performance.
See “LayoutConsiderations.”
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