BQ3055 Datasheet, PDF (11/23 Pages) Texas Instruments – 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq3055
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SLUSA91A – OCTOBER 2010 – REVISED JANUARY 2012
ELECTRICAL CHARACTERISTICS: OCD Current Protection
Typical values stated where TA = 25ºC and VCC = 14.4 V, Min/Max values stated where T_A= –40ºC to 85ºC and VCC = 3.8 V
to 25 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V_(OCD)
OCD detection threshold voltage ^{RSNS = 0}
range, typical
RSNS = 1
50
200
mV
25
100
mV
ΔV_(OCDT)
OCD detection threshold voltage ^{RSNS = 0}
program step
RSNS = 1
10
mV
5
mV
V_(OFFSET)
OCD offset
–10
V_{(Scale_Err)}
OCD scale error
–10
t_(OCDD)
Over Current in Discharge Delay
1
t_{(OCDD_STEP)} OCDD Step options
2
t_(DETECT)
Current fault detect time
VSRP – SRN = VTHRESH + 12.5 mV
t_ACC
Over Current and Short Circuit
delay time accuracy
Accuracy of typical delay time
–20
10
mV
10
%
31
ms
ms
160
µs
20
%
ELECTRICAL CHARACTERISTICS: SCD1 Current Protection
Typical values stated where TA = 25ºC and VCC = 14.4 V, Min/Max values stated where T_A= –40ºC to 85ºC and VCC = 3.8 V
to 25 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V_(SDC1)
SCD1 detection threshold
voltage range, typical
RSNS = 0
RSNS = 1
100
450
mV
50
225
mV
ΔV_(SCD1T)
SCD1 detection threshold
voltage program step
RSNS = 0
RSNS = 1
50
mV
25
mV
V_(OFFSET)
SCD1 offset
–10
V_{(Scale_Err)}
SCD1 scale error
–10
AFE.STATE_CNTL[SCDDx2] = 0
0
t_(SCD1D)
Short Circuit in Discharge Delay
AFE.STATE_CNTL[SCDDx2] = 1
0
10
mV
10
%
915
µs
1830
µs
AFE.STATE_CNTL[SCDDx2] = 0
61
µs
t_{(SCD1D_STEP)} SCD1D Step options
AFE.STATE_CNTL[SCDDx2] = 1
122
µs
t_(DETECT)
t_ACC
Current fault detect time
VSRP – SRN = VTHRESH + 12.5 mV
Over Current and Short Circuit
delay time accuracy
Accuracy of typical delay time
–20
160
µs
20
%
ELECTRICAL CHARACTERISTICS: SCD2 Current Protection
Typical values stated where TA = 25ºC and VCC = 14.4 V, Min/Max values stated where T_A= –40ºC to 85ºC and VCC = 3.8 V
to 25 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V_(SDC2)
SCD2 detection threshold
voltage range, typical
RSNS = 0
RSNS = 1
100
450
mV
50
225
mV
ΔV_(SCD2T)
SCD2 detection threshold
voltage program step
RSNS = 0
RSNS = 1
50
mV
25
mV
V_(OFFSET)
SCD2 offset
–10
V_{(Scale_Err)}
SCD2 scale error
–10
AFE.STATE_CNTL[SCDDx2] = 0
0
t_(SCD1D)
Short Circuit in Discharge Delay
AFE.STATE_CNTL[SCDDx2] = 1
0
10
mV
10
%
458
µs
915
µs
AFE.STATE_CNTL[SCDDx2] = 0
30.5
µs
t_{(SCD2D_STEP)} SCD2D Step options
AFE.STATE_CNTL[SCDDx2] = 1
61
µs
t_(DETECT)
t_ACC
Current fault detect time
VSRP – SRN = VTHRESH + 12.5 mV
Over Current and Short Circuit
delay time accuracy
Accuracy of typical delay time
–20
160
µs
20
%
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