Datasheet
TPS2350
SLUS574D –JULY 2003–REVISED OCTOBER 2013
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ELECTRICAL CHARACTERISTICS (continued)
–VINA = –48 V, –VINB = 0 V, UV = 2.5 V, OV = 0.5 V, SENSE = 0 V, RAMP = 0 V, SOURCE = more negative of –VINA and
–VINB, all outputs unloaded, T
A
= –40°C to 85°C (unless otherwise noted)
(1)(2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Overload Comparator
V
TH_OL
SENSE current overload threshold 100 120 140 mV
t
RSP
Response time SENSE – SOURCE = 200 mV 2 4 7 µs
Fault Timer
FLTTIM low-level output voltage, to
V
OL
UV = –48 V 5 mV
–VINA
FLTTIM charging current, current limit
I
CHG
FLTTIM – SOURCE = 2 V –54 –50 –41 µA
mode
FLTTIM fault threshold voltage to
V
FLT
3.75 4.00 4.25
SOURCE
V
V
RST
Fault reset threshold to SOURCE 0.5
I
DSG
FLTTIM Discharge current, retry mode FLTTIM – SOURCE = 2 V 0.38 0.75 µA
SENSE – SOURCE = 80 mV,
D Output duty cycle during retry cycles 1% 1.5%
FLTTIM − SOURCE = 2 V
FLTTIM discharge current, timer reset FLTTIM − SOURCE = 2 V,
I
RST
1 mA
mode SENSE = 2 V
Logic Outputs (FLT, PG)
I
OHFLT
FLT high-level output leakage current UV = –48 V, FLT – SOURCE = 80 V –10 10
µA
I
OHPG
PG high-level output leakage current UV = –45 V, PG – SOURCE = 80 V –10 10
SENSE–SOURCE = 80 mV,
R
DS(on)
FLT ON resistance FLTTIM–SOURCE = 5 V, 50 80
Ω
I(FLT) = 1 mA
R
DS(on)
PG ON resistance UV = –48 V, I
O
(PG) = 1 mA 50 80
Supply Selector
V
THA
Threshold voltage, –VINA falling –VINB = –48 V, –VINA falling –48.45 –48.40 –48.35
V
V
THB
Threshold voltage, –VINB falling –VINA = –48 V, –VINB falling –48.45 –48.40 –48.35
–VINA = 0 V, –VINB = –48 V,
I
SINK
GATA sink current 30 80 mA
GATA = –41 V
–VINA = –48 V, –VINB = –0 V,
I
SOURCE
GATA source current –50 –20 µA
GATA = –41 V
–VINA = –48 V, –VINB = –0 V,
I
SINK
GATB sink current 30 80 mA
GATB = –41 V
–VINA = 0 V, –VINB = –48 V,
I
SOURCE
GATB source current –50 –20 µA
GATB = –41 V
V
OLA
GATA low voltage to –VINA VINA = 0 V, –VINB = –48 V 0.1
V
OLA
GATA high voltage to –VINA –VINA = –48 V, –VINB = 0 V 11 14 17
V
V
OLB
GATB low voltage to –VINB –VINA = –48 V, –VINB = 0 V 0.1
V
OLB
GATB high voltage to –VINB –VINA = 0 V, –VINB = –48 V 11 14 17
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