BQ40Z50-R2 Datasheet, PDF (16/51 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq40z50-R2
SLUSCS4 – JUNE 2017
www.ti.com
7.31 OCD, SCC, SCD1, SCD2 Current Protection Thresholds
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)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OCD
OCD detection
threshold voltage range
V_OCD = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_OCD = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–16.6
–8.3
–100
mV
–50
ΔV_OCD
OCD detection
threshold voltage
program step
V_OCD = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_OCD = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–5.56
mV
–2.78
V_SCC
SCC detection
threshold voltage range
V_SCC = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCC = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
44.4
22.2
200
mV
100
ΔV_SCC
SCC detection
threshold voltage
program step
V_SCC = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCC = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
22.2
mV
11.1
V_SCD1
SCD1 detection
threshold voltage range
V_SCD1 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCD1 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–44.4
–22.2
–200
mV
–100
ΔV_SCD1
SCD1 detection
threshold voltage
program step
V_SCD1 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCD1 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–22.2
mV
–11.1
V_SCD2
SCD2 detection
threshold voltage range
V_SCD2 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCD2 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–44.4
–22.2
–200
mV
–100
ΔV_SCD2
SCD2 detection
threshold voltage
program step
V_SCD2 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 1
V_SCD2 = V_SRP – V_SRN, AFE PROTECTION
CONTROL[RSNS] = 0
–22.2
mV
–11.1
V_OFFSET
OCD, SCC, and SCDx
offset error
Post-trim
–2.5
2.5 mV
V_SCALE
OCD, SCC, and SCDx ^{No trim}
scale error
Post-trim
–10%
–5%
10%
—
5%
7.32 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
16
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