Datasheet



SLUS471D − JUNE 2002 − REVISED JANUARY 2008
9
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TYPICAL CHARACTERISTICS
Figure 13
−40 −15 10 35 60 85
−10.5
−10.3
−10.1
−9.9
−9.7
−9.5
IRAMP OUTPUT CURRENT
vs
AMBIENT TEMPERATURE, NORMAL RATE
I
SRC2
− IRAMP Output Current − µA
Average for V
O(IRAMP)
= 1 V, 3 V
V
RTN
= 36 V to 80 V
T
A
− Ambient Temperature − °C
Figure 14
TIMER CHARGING CURRENT
vs
AMBIENT TEMPERATURE
−40 −15 10 35 60 85
−55
−53
−51
−49
−47
−45
I
CHG
− Charging Current − µA
V
I(ISENS)
= 80 mV
V
O(FLTTIME)
= 2 V
T
A
− Ambient Temperature − °C
V
RTN
= 48 V
V
RTN
= 36 V
V
RTN
= 80 V
Figure 15
−40 −15 10 35 60 8
5
0.26
0.29
0.32
0.35
0.38
0.41
0.44
0.47
0.50
FLTTIME DISCHARGE CURRENT
vs
AMBIENT TEMPERATURE (TPS2391)
I
DSG
− Discharge Current − µA
V
I(ISENS)
= 80 mV
V
O(FLTTIME)
= 2 V
V
RTN
= 36 V to 80 V
T
A
− Ambient Temperature − °C
Figure 16
FAULT LATCH THRESHOLD
vs
AMBIENT TEMPERATURE
−40 −15 10 35 60 85
3.75
3.88
4.00
4.13
4.25
V
FLT
− Threshold Voltage − V
V
RTN
= 48 V
T
A
− Ambient Temperature − °C