Cassette Style
100 Watt AC-DC Converters
S Series PFC
D-signal with respect to input and output voltage versus time:
Input voltage monitoring
NPN UD
UD high
UD low
0
3
3
ID
ID high
ID low
0
JFET UD
UD high
UD low
0
Uo1
Uo1 nom
1
0.95
th1
tlow
4
min
0
Uci [V DC]
11044
3
3
t
t
tlow
4
min
tlow
4
min
t
thigh min
th1
t
358
355
0
Input voltage failure
Output voltage monitoring
NPN UD
UD high
2
Switch-on cycle
UD low
0
ID
ID high
ID low
0
JFET UD
UD high
UD low
0
Uo1
Uo1 nom
Uto +Uho
Uto
0
tlow
4
min
Output voltage failure
Fig. 38
Relationship between Uci, Uo1, UD, Uo1/Uo nom versus time
Input voltage sag
t
Switch-on cycle and subsequent
input voltage failure
t
t
t
1 Hold-up time see section Electrical Input Data.
2 With output voltage monitoring, hold-up time th = 0.
3 The signal will remain high if the D output is connected to
an external source.
t 4 tlow min = 100...170 ms, typically 130 ms.
Edition 01/01.2001
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