UC17131/2/3
UC27131/2/3
UC37131/2/3
APPLICATION INFORMATION (cont.)
tINT
VCC
t
t
VCDEL_MAX = 5.8V
VFAULT_H = 4.9V
VFAULT_L = 1.0V
VCDEL
VFAULT_H
tD(OFF)
tD(ON)
tD(ON)
OUTPUT
DRIVER
DISABLED
DISABLED
ENABLED
ENABLED
t
LED
t
INDETERMINATE
STATE
UDG-98030
Figure 3b. Power interrupt fault operation, high side configuration, V = 5VDC.
IN
I
LOAD
t
4.9V
V
CDEL
t
t
tSC
OUTPUT
DRIVER
tR(OFF)
LED
t
UDG-98031
Figure 3c. Overcurrent fault operation.
UNITRODE CORPORATION
7 CONTINENTAL BOULEVARD • MERRIMACK, NH 03054
TEL (603) 424-2410 • FAX (603) 424-3460
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