BQ40Z60_16 Datasheet, PDF (18/47 Pages) Texas Instruments – Programmable Battery Management Unit

bq40z60
SLUSAW3C – DECEMBER 2014 – REVISED JULY 2015
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8.48 Timing Requirements
Typical values stated where T_A = 25°C and VCC = 10.8 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
MIN
TYP
MAX UNIT
CURRENT PROTECTION TIMING
t_OCD
OCD detection delay
time
1
31 ms
Δt_OCD
OCD detection delay
time program step
2
ms
t_SCC
SCC detection delay
time
0
915 µs
Δt_SCC
SCC detection delay
time program step
61
µs
t_SCD1
SCD1 detection delay ^{PROTECTION_CONTROL[SCDDx2] = 0}
time
PROTECTION_CONTROL[SCDDx2] = 1
0
915
µs
0
1850
Δt_SCD1
SCD1 detection delay ^{PROTECTION_CONTROL[SCDDx2] = 0}
time program step
PROTECTION_CONTROL[SCDDx2] = 1
61
µs
121
t_SCD2
SCD2 detection delay ^{PROTECTION_CONTROL[SCDDx2] = 0}
time
PROTECTION_CONTROL[SCDDx2] = 1
0
458
µs
0
915
Δt_SCD2
SCD2 detection delay ^{PROTECTION_CONTROL[SCDDx2] = 0}
time program step
PROTECTION_CONTROL[SCDDx2] = 1
30.5
µs
61
t_DETECT
t_ACC
Current fault detect
time
V_SRP – V_SRN = V_T – 3 mV for OCD, SCD1, and SC2,
V_SRP – V_SRN = V_T + 3 mV for SCC
Current fault delay time
accuracy
Max delay setting
–10%
160 µs
10%
8.49 Typical Characteristics
1050000
1040000
Typical Charger Switching Frequency
1030000
1020000
1010000
1000000
990000
980000
970000
960000
950000
-40
10
60
Temperature (ƒC)
C001
Figure 1. Charger Switching Frequency Across Temperature
18
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