Texas Instruments BQ76942, Руководство пользователя

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Typical values stated where T
A
= 25°C and V
BAT
= 55.0 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 55 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
(PULLDOWN)
Current sink capability, PCHG and
PDSG
PCHG and PDSG enabled, V
BAT
= 37.0 V 30 µA
7.9 FUSE Pin Functionality
Typical values stated where T
A
= 25°C and V
BAT
= 55.0 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 55 V (unless otherwise noted)
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
SERIES
= 100
Ω, V
(OH)
= 10% to 90% of final settled
voltage
0.5 µs
7.10 REG18 LDO
Typical values stated where T
A
= 25°C and V
BAT
= 55.0 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 55 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
C
REG18
External capacitor, REG18 to VSS
(1)
1.8 2.2 22 µF
V
REG18
Regulator voltage 1.6 1.8 2 V
ΔV
O(TEMP)
Regulator output over temperature
ΔV
REG18
vs (V
REG18
at 25°C), I
REG18
= 1
mA, V
BAT
= 37.0 V
±0.15 %
ΔV
O(LINE)
Line regulation
ΔV
REG18
vs (V
REG18
at 25°C, V
BAT
= 37.0
V), I
REG18
= 1 mA, as V
BAT
varies across
specified range
–0.6 0.5 %
ΔV
O(LOAD)
Load regulation
ΔV
REG18
vs (V
REG18
, V
BAT
= 37.0 V),
I
REG18
= 0 mA to 1 mA, at 25°C
–1.5 1.5 %
I
SC
Regulator short-circuit current limit V
REG18
= 0 V 3 14 mA
(1) Specified by design
7.11 REG0 Pre-regulator
Typical values stated where T
A
= 25°C and V
BAT
= 55.0 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 55 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
BREG_HDRM
Pre-regulator control voltage
headroom ( min(V
BAT
- V
BREG
) )
V
BAT
≥ 4.7 V 1.5 1.9 V
V
REGIN_INT
Pre-regulator voltage, when
generated using BREG V
BAT
> 8 V, although specific requirement
depends on external device selected
5 5.5 5.8 V
V
REGIN_EXT
Pre-regulator voltage when using
externally supplied REGIN
(3)
See requirements based on settings of
REG1 and REG2
5.5 V
ΔV
O(TEMP)
Regulator output over temperature
ΔV
REGIN
vs V
REGIN
at 25°C, I
REGIN
= 50
mA, V
BAT
> 8 V
±0.05 %
I
Max
Maximum current driven out from
BREG Under short circuit conditions (V
REGIN
= 0
V)
2.5 3.33 mA
C
EXT
External capacitor REGIN to VSS
(2)
(3)
15 22 27 nF
BQ76942
SLUSE14B – DECEMBER 2020 – REVISED DECEMBER 2021
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