Datasheet

bq77PL900
SLUS844B – JUNE 2008 – REVISED JANUARY 2009 ...................................................................................................................................................... www.ti.com
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
BATTERY PROTECTION THRESHOLDS
OV detection threshold
V
OV
Default 4.15 4.5 V
range
OV detection threshold
Δ V
OV
50 mV
program step
OV detection hysteresis
V
OVH
Default 0 0.3 V
voltage range
OV detection hysteresis
Δ V
OVH
0.1 V
program step
UV detection threshold
V
UV
Default 1.4 2.9 V
range
UV detection threshold
Δ V
UV
100 mV
program step
UV detection hysteresis
V
UVH
Default 0.2 1.2 V
voltage
UV detection threshold
Δ V
UVH
200 mV
program step
OCD detection threshold
V
OCDT
Default 10 85 mV
range
OCD detection threshold
Δ V
OCDT
5 mV
program step
SCD detection threshold
V
SCDT
Default 60 135 mV
range
SCD detection threshold
Δ V
SCDT
5 mV
program step
OV detection threshold
V
OV_acr
Default (T
A
= 0 ° C to 85 ° C) – 50 0 50 mV
accuracy
UV detection threshold
V
UV_acr
Default – 100 0 100 mV
accuracy
V
OCD
= 10 mV or 15 mV – 4 0 4 mV
OCD detection threshold
V
OCD_acr
accuracy
V
OCD
> 20 mV – 20% 0 20%
SCD detection threshold
V
SCD_acr
Default – 20% 0 20%
accuracy
BATTERY PROTECTION DELAY TIMES
OV detection delay time
t
OV
Default 500 2250 ms
range
OV detection delay time
Δ t
OV
250 ms
step
UV detection delay time
t
UV
Default 0 8000 ms
range
UV detection delay time
Δ t
UV
1.25 1000 ms
step
OCD detection delay
t
OCD
Default 20 1600 ms
time range
OCD detection delay
Δ t
OCD
20 100 ms
time step
SCD detection delay
t
SCD
Default 0 900 µ s
time range
SCD detection threshold
Δ t
SCD
60 µ s
program step
OV detection delay time
t
OV_acr
Default – 15% 0% 15%
accuracy
UV detection delay time
t
UV_acr
Default – 15% 0% 15%
accuracy
OC detection delay time
t
OC_acr
Default – 15% 0% 15%
accuracy
SC detection delay time
V
SCD_acr
t
SCD
Max – 15% 0% 15%
accuracy
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