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BQ769142
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
Typical values stated where T
to 80 V (unless otherwise noted)
PARAMETER
CHG pin voltage with
respect to BAT, DSG
pin voltage with
V
(FETON_LO_LOBAT)
respect to BAT, 4.7 V
≤ V
BAT
(2)
V
DSG
DSG on voltage with
V
(SRCFOL_FETON)
respect to BAT
CHG off voltage with
V
(CHGFETOFF)
respect to BAT
DSG off voltage with
V
(DSGFETOFF)
respect to LD
CHG and DSG rise
t
(FET_ON)
time
t
CHG fall time to BAT
(CHGFETOFF)
t
DSG fall time to LD
(DSGFETOFF)
Charge pump start up
t
(CP_START)
time
Charge pump
C
(CP1)
capacitor
(1)
Operation with V
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
BAT
5.5 V or 11 V mode), the maximum voltage on V
their maximum specified voltage.
(2)
When the DSG driver is enabled, the CHG driver is disabled, and a voltage is applied at the LD pin such that V
at DSG will rise to ≈ V
LD
(3)
Specified by design
(4)
Specified by characterization
(5)
R
can be optimized during design and system evaluation for best performance. A larger value may be desired to avoid an overly
GATE
fast FET turn off, which can result in a large voltage transient due to cell and harness inductance.
7.26 Comparator-Based Protection Subsystem
Typical values stated where T
to 80 V (unless otherwise noted)
PARAMETER
V
Overvoltage detection range
(OVP)
Overvoltage detection voltage
V
(OVP_ACC)
threshold accuracy
20
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= 25°C and V
= 59.2 V, min/max values stated where T
A
BAT
(1)
TEST CONDITIONS
CHG/DSG C
L
overdrive setting
< 8 V, V
≤
LD
CHG/DSG C
L
CHG/DSG C
L
CHG/DSG C
L
CHG/DSG C
L
to 4 V gate-source overdrive, charge pump
high overdrive setting
CHG C
= 20 nF, R
L
10% of V
(FETON)
DSG C
= 20 nF, R
L
(5)
of V
(FETON)
C
= 20 nF, C
L
(CP1)
V
(FETON)
(3)
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
BAT
- 0.7 V
= 25°C and V
= 59.2 V, min/max values stated where T
A
BAT
(1)
Nominal setting (50.6 mV steps)
T
= +25°C, nominal setting between
A
1.012 V and 5.566 V
T
= +25°C, nominal setting between
A
3.036 V and 5.06 V
T
= -10°C to +60°C, nominal setting
A
between 1.012 V and 5.566 V
(4)
T
= -10°C to +60°C, nominal setting
A
between 3.036 V and 5.06 V
T
= -40°C to +85°C, nominal setting
A
between 1.012 V and 5.566 V
T
= -40°C to +85°C, nominal setting
A
between 3.036 V and 5.06 V
Product Folder Links:
= 20 nF, charge pump low
= 20 nF, source follower mode
= 20 nF, steady state value
= 20 nF, steady state value
= 20 nF, R
= 100 Ω, 0.5 V
GATE
(4) (5)
= 100 Ω, 90% to
GATE
(5)
= 100 Ω, 90% to 10%
GATE
= 470 nF, 10% to 90% of
TEST CONDITIONS
(2)
(2)
(2)
(2)
(2)
(2)
BQ769142
www.ti.com
= -40°C to 85°C and V
A
BAT
MIN
TYP
MAX
3.5
5
7
0
0.4
0.7
21
40
46
65
2
20
100
100
470
2200
> V
, the voltage
LD
DSG
= -40°C to 85°C and V
A
BAT
MIN
TYP
MAX
1.012 V
to 5.566
V in 50.6
mV steps
±2
–10
10
±3
–15
15
±5
–25
25
Copyright © 2021 Texas Instruments Incorporated
= 4.7 V
UNIT
V
V
V
V
µs
µs
µs
ms
nF
= 4.7 V
UNIT
V
mV
mV
mV
mV
mV
mV
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