BQ40Z50-R2 Datasheet, PDF (17/51 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

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bq40z50-R2
SLUSCS4 – JUNE 2017
Timing Requirements: OCD, SCC, SCD1, SCD2 Current Protection Timing (continued)
Typical values stated where T_A = 25°C and VCC = 14.4 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
NOM
MAX UNIT
Δt_SCD1
SCD1 detection
delay time
program step
AFE PROTECTION CONTROL[SCDDx2] = 0
AFE PROTECTION CONTROL[SCDDx2] = 1
61
µs
121
t_SCD2
SCD2 detection ^{AFE PROTECTION CONTROL[SCDDx2] = 0}
delay time
AFE PROTECTION CONTROL[SCDDx2] = 1
0
458
µs
0
915
Δt_SCD2
SCD2 detection
delay time
program step
AFE PROTECTION CONTROL[SCDDx2] = 0
AFE PROTECTION CONTROL[SCDDx2] = 1
30.5
µs
61
t_DETECT
t_ACC
Current fault
detect time
Current fault
delay time
accuracy
V_SRP – V_SRN = V_T – 3 mV for OCD, SCD1, and SC2,
V_SRP – V_SRN = V_T + 3 mV for SCC
Max delay setting
–10%
160
µs
10%
7.33 Timing Requirements: SMBus
Typical values stated where T_A = 25°C and VCC = 14.4 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
NOM
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(START)
Hold time after (repeated)
start
4.0
µs
t_SU(START)
t_SU(STOP)
t_HD(DATA)
t_SU(DATA)
t_TIMEOUT
t_LOW
t_HIGH
t_R
t_F
t_LOW(SEXT)
Repeated start setup time
Stop setup time
Data hold time
Data setup time
Error signal detect time
Clock low period
Clock high period
Clock rise time
Clock fall time
Cumulative clock low slave
extend time
10% to 90%
90% to 10%
4.7
µs
4.0
µs
300
ns
250
ns
25
35 ms
4.7
µs
4.0
50
µs
1000
ns
300
ns
25 ms
t_LOW(MEXT)
Cumulative clock low
master extend time
10 ms
7.34 Timing Requirements: SMBus XL
Typical values stated where T_A = 25°C and VCC = 14.4 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
NOM
MAX UNIT
f_SMBXL
SMBus XL operating
frequency
SLAVE mode
40
400 kHz
t_BUF
Bus free time between start
and stop
4.7
µs
t_HD(START)
Hold time after (repeated)
start
4.0
µs
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