Datasheet

bq77PL900
www.ti.com ...................................................................................................................................................... SLUS844B – JUNE 2008 – REVISED JANUARY 2009
ELECTRICAL CHARACTERISTICS (continued)
BAT = PACK = 7 V to 50 V, T
A
= – 25 ° C to 85 ° C, typical values stated where T
A
= 25 ° C and BAT = PACK = 36 V (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OC/SC recovery timing
t
SRC
– 15% 12.8 s 15%
in stand-alone mode
BATTERY PROTECTION RECOVERY
V
RECSC
SC, OC recovery voltage 1 1.4 2 V
V
RECUV
= V
PACK –
V
BAT
,
Undervoltage recover
V
RECUV
0.05 0.1 0.3 V
voltage
V
UV
+ V
UVH
> V
CELL
> V
UV
FET DRIVE
V
O(FETONDSG)
= V
(BAT)
– V
(DSG)
,
8 12 16
VGS connect 1 M Ω , BAT = PACK = 35 V
Output voltage, charge
V
(FETON)
V
and discharge FETs on
V
O(FETONCHG)
= V
(PACK)
– V
(CHG)
,
8 12 16
VGS connect 1 M Ω , BAT = PACK = 35 V
V
O(FETOFFDSG)
= V
(PACK)
– V
(DSG)
, BAT = PACK = 35 V 0.2
Output voltage, charge
V
(FETOFF)
V
and discharge FETs off
V
O(FETOFFCHG)
= V
(BAT)
– V
(CHG)
, BAT = PACK = 35 V 0.2
V
DSG
: 10% to 90% 5 15
t
r
Rise time C
L
= 20 nF, BAT = PACK = 35 V µ s
V
CHG
: 10% to 90% 5 15
V
DSG
: 90% to 10% 90 140
t
f
Fall time C
L
= 20 nF, BAT = PACK = 35 V µ s
V
CHG
: 90% to 10% 90 140
LOGIC
XALERT, I
OUT
= 200 µ A, T
A
= – 40 ° C to 100 ° C 0.4
Logic-level output SDATA, SCLK, XRST, I
OUT
= 1 mA,
V
OL
0.4 V
voltage T
A
= – 40 ° C to 100 ° C
GPOD, I
OUT
= 1 mA, T
A
= – 40 ° C to 100 ° C 0.6
I
LEAK
Leakage current GPOD VOUT = 1 V, T
A
= – 40 ° C to 100 ° C 1 µ A
V
IH
SCLK (hysteresis input) Hysteresis 400 mV
XALERT, T
A
= – 40 ° C to 100 ° C 60 100 200
R
UP
Pullup resistance DATA, SCLK, T
A
= – 40 ° C to 100 ° C 6 10 20 k Ω
XRST, T
A
= – 40 ° C to 100 ° C 1 3 6
I
DOWN
Pulldown current CNF0, CNF1, CNF2 = VREG2 2 4 µ A
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