BQ2054 Datasheet, PDF (13/16 Pages) Texas Instruments – Lithium Ion Fast-Charge IC

bq2054
Impedance
Symbol
Parameter
Minimum
RBATZ BAT pin input impedance
50
RSNSZ SNS pin input impedance
50
RTSZ
TS pin input impedance
50
RPROG1
Soft-programmed pull-up or pull-down
resistor value (for programming)
-
RPROG2 Pull-up or pull-down resistor value
-
RMTO
Charge timer resistor
20
Typical Maximum
-
-
-
-
-
-
-
10
-
3
-
480
Unit
MΩ
MΩ
MΩ
Notes
kΩ ^DSEL
kΩ
ITERM
kΩ
Timing (TA = TOPR; VCC = 5V ±10%)
Symbol
Parameter
tMTO
tQT
tHO
tIMIN
Charge time-out range
Pre-charge qual test time-out period
Termination hold-off period
Min. current detect filter period
FPWM
PWM regulator frequency range
Minimum
1
-
1.14
80
-
Typical
-
tMTO
-
100
Maximum
24
-
1.52
160
Unit
hours
-
sec.
msec.
kHz
Notes
See Figure 7
CPWM = 0.001µF
(equation 7)
Capacitance
Symbol
Parameter
Minimum
Typical
Maximum
Unit
CMTO
CPWM
Charge timer capacitor
PWM R-C capacitance
-
-
0.1
µF
-
0.001
-
µF
13