BQ33100_15 Datasheet, PDF (9/67 Pages) Texas Instruments – Super Capacitor Manager

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bq33100
SLUS987B – JANUARY 2011 – REVISED DECEMBER 2015
7.19 Current Protection Thresholds
Typical values stated where T_A = 25°C and VCC = VCC = 14.4 V, Minimum and maximum values stated where T_A = –40°C to
85°C and VCC = VCC = 3.8 V to 25 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_(OCD)
OCD detection threshold voltage range, typical
RSNS = 0
RSNS = 1
50
200
mV
25
100
ΔV_(OCDT) OCD detection threshold voltage program step
RSNS = 0
RSNS = 1
10
mV
5
V_(SCCT)
SCC detection threshold voltage range, typical
ΔV_(SCCT) SCC detection threshold voltage program step
RSNS = 0
RSNS = 1
RSNS = 0
RSNS = 1
RSNS is set in
STATE_CTL
register
–100
–50
–300
mV
–225
–50
mV
–25
V_(SCDT)
SCD detection threshold voltage range, typical
RSNS = 0
RSNS = 1
100
450
mV
50
225
ΔV_(SCDT) SCD detection threshold voltage program step
RSNS = 0
RSNS = 1
50
mV
25
V_(OFFSET) SCD, SCC and OCD offset
V_{(Scale_Err)} SCD, SCC and OCD scale error
–10
–10%
10
mV
10%
7.20 Current Protection Timing
Typical values stated where T_A = 25°C and VCC = VCC = 14.4 V, Minimum and maximum values stated where T_A = –40°C to
85°C and VCC = VCC = 3.8 V to 25 V (unless otherwise noted)
MIN NOM MAX UNIT
t_(OCDD)
t_{(OCDD_STEP)}
t_(SCDD)
Overcurrent in discharge delay
OCDD step options
Short circuit in discharge delay
AFE.STATE_CNTL[SCDDx2] = 0
AFE.STATE_CNTL[SCDDx2] = 1
1
31 ms
2
ms
0
915
μs
0
1830
t_{(SCDD_STEP)}
SCDD step options
AFE.STATE_CNTL[SCDDx2] = 0
AFE.STATE_CNTL[SCDDx2] = 1
61
μs
122
t_(SCCD)
t_{(SCCD_STEP)}
t_(DETECT)
t_ACC
Short circuit in charge delay
SCCD step options
Current fault detect time
Overcurrent and short circuit
delay time accuracy
0
V_SRP-SRN = V_THRESH + 12.5 mV,
T_A = –40°C to 85°C
Accuracy of typical delay time with WDI active
Accuracy of typical delay time with no WDI
input
–20%
–50%
915 μs
61
μs
35
160 μs
20%
50%
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