BQ3050 Datasheet, PDF (13/28 Pages) Texas Instruments – 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq3050
www.ti.com
SLUSA92A – JANUARY 2011 – REVISED JUNE 2011
ELECTRICAL CHARACTERISTICS: SCD1 Current Protection (continued)
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
t_ACC
Over Current and Short Circuit
delay time accuracy
Accuracy of typical delay time
–20
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
%
ELECTRICAL CHARACTERISTICS: SCC 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_(SCCT)
SCC detection threshold voltage ^{RSNS = 0}
range, typical
RSNS = 1
–100
–50
–300
mV
–225
mV
ΔV_(SCCDT)
SCC detection threshold voltage ^{RSNS = 0}
program step
RSNS = 1
–50
mV
–25
mV
V_(OFFSET)
SCC offset
–10
10
mV
V_{(Scale_Err)}
SCC scale error
–10
10
%
t_(SCCD)
Short Circuit in Charge Delay
0
915
ms
t_{(SCCD_STEP)} SCCD Step options
61
ms
t_(DETECT)
Current fault detect time
VSRP – SRN = VTHRESH + 12.5 mV
160
µs
t_ACC
Over Current and Short Circuit
delay time accuracy
Accuracy of typical delay time
–20
20
%
ELECTRICAL CHARACTERISTICS: SBS Timing Characteristics
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
f_SMB
SMBus operating frequency
Slave mode, SMBC 50% duty cycle
10
100
kHz
f_MAS
SMBus master clock frequency
Master mode, no clock low slave
extend
51.2
kHz
t_BUF
Bus free time between start and
stop
4.7
µs
t_HD:STA
Hold time after (repeated) start
4.0
µs
Copyright © 2011, Texas Instruments Incorporated
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