BQ4050 Datasheet, PDF (17/53 Pages) Texas Instruments – CEDV Gas Gauge and Protection Solution

www.ti.com
bq4050
SLUSC67A – MARCH 2016 – REVISED MARCH 2016
6.32 Timing Requirements: OCD, SCC, SCD1, SCD2 Current Protection Timing
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
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 ^{AFE PROTECTION CONTROL[SCDDx2] = 0}
delay time
AFE PROTECTION CONTROL[SCDDx2] = 1
0
915
µs
0
1850
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%
6.33 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
f_MAS
SMBus master clock
frequency
MASTER mode, no clock low slave extend
10
51.2
100 kHz
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
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: bq4050
Submit Documentation Feedback
17