Texas Instruments BQ769142, Руководство пользователя

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7.7 LD Pin
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
(PULLUP)
Internal pullup current from BAT pin to LD
pin, used for load detect functionality
V
BAT
≥ 4.7 V, V
LD
= VSS 35 100 172 µA
R
PD
Internal pulldown resistance on LD pin in
SHUTDOWN mode
V
BAT
≥ 4.7 V 80 kΩ
(1) Operation with V
BAT
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
5.5 V or 11 V mode), the maximum voltage on V
BAT
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
their maximum specified voltage.
7.8 Precharge (PCHG) and Predischarge (PDSG) FET Drive
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
(PCHG_ON)
Output voltage, PCHG on
max(V
PACK
, V
BAT)
- V
PCHG
, V
PACK
≥ 8 V,
V
BAT
≥ 4.7 V
7.5 8.4 9.7 V
V
(PCHG_ON)
Output voltage, PCHG on
V
PACK
- V
PCHG
, 4.7 V ≤ V
PACK
< 8 V, V
BAT
≥ 4.7 V, V
PACK
> V
BAT
V
PACK
–
0.5 V
V
PACK
V
V
(PDSG_ON)
Output voltage, PDSG on max(V
LD
, V
BAT
) - V
PDSG
, V
BAT
≥ 8 V 7.47 8.4 9.7 V
V
(PDSG_ON)
Output voltage, PDSG on
V
BAT
- V
PDSG
, 4.7 V ≤ V
BAT
< 8 V, V
BAT
≥
V
LD
V
BAT
–
0.5 V
V
BAT
V
I
(PULLDOWN)
Current sink capability, PCHG and
PDSG
PCHG and PDSG enabled, V
BAT
= 59.2 V 30 µA
(1) Operation with V
BAT
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
5.5 V or 11 V mode), the maximum voltage on V
BAT
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
their maximum specified voltage.
7.9 FUSE Pin Functionality
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
(OH)
Output voltage high (when driving fuse) V
BAT
≥ 8 V, C
L
= 1 nF, 5 kΩ load. 6 7 9 V
V
(OH)
Output voltage high (when driving fuse) 4.7 V ≤ V
BAT
< 8 V, C
L
= 1 nF, 5 kΩ load.
V
BAT
–
1.75
V
V
(IH)
High-level input (for fuse detection)
Current into device pin must be limited to
maximum 2 mA
2 12 V
V
(IL)
Low-level input (for fuse detection) 0.7 V
t
(RISE)
Output rise time (when driving fuse)
V
BAT
≥ 8 V, C
L
= 1 nF, R
LOAD
= 5 kΩ,
V
(OH)
= 10% to 90% of final settled
voltage
0.5 µs
(1) Operation with V
BAT
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
5.5 V or 11 V mode), the maximum voltage on V
BAT
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
their maximum specified voltage.
7.10 REG18 LDO
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
C
REG18
External capacitor, REG18 to VSS
(2)
1.8 2.2 22 µF
V
REG18
Regulator voltage 1.6 1.8 2 V
BQ769142
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
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