BQ2902 Datasheet, PDF (6/12 Pages) Texas Instruments – Rechargeable Alkaline Charge/Discharge Controller IC

bq2902
Absolute Maximum Ratings
Symbol
Parameter
Minimum Maximum Unit
Notes
DCIN
VDC relative to GND
-0.3
7.0
V
DC threshold voltage applied on any
VT
pin, excluding the DC pin, relative to
-0.3
7.0
V
GND
TOPR
Operating ambient temperature
0
+70
°C Commercial
-40
+85
°C Industrial
TSTG
TSOLDER
IDC
ILOAD
IOL
Storage temperature
Soldering temperature
DC charging current
Discharge current
Output current
-40
+85
°C
-
+260
°C 10 sec max.
-
400
mA
-
500
mA
-
-
mA CHG
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 Thresholds (TA = 25°C; VDC = 5.5V)
Symbol
Parameter
VMAX
Maximum open-circuit
voltage
VEDV
End-of-discharge voltage
VFLT
VMIN
VCE
Maximum open-circuit
voltage
Minimum battery voltage
Charge enable
Rating
1.63
0.90
1.00
1.10
3.00
0.40
1.40
Tolerance
± 3%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
Unit
Notes
V
V_OCV > VMAX inhibits/terminates
charge pulses
V VSEL = BAT2N
V VSEL = Z
V VSEL = BAT1P
V
V_CCV > VFLT terminates charge, in-
dicates fault
V VOCV < VMIN inhibits charge
V
VOCV < VCE on both cells re-
initiates charge
Note:
Each DC threshold parameter above has a temperature coefficient associated with it. To determine the
coefficient for each parameter, use the following formula:
Tempco = ^{ParameterRating} * -0.5mV/°C
1.63
The tolerance for these temperature coefficients is 10%.
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