LS4270-7E 查看數據表（PDF） - Power-One Inc.
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LS4270-7E Datasheet PDF : 27 Pages
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Cassette Style
100 Watt AC-DC Converters
S Series PFC
Input voltage monitoring
V2 UV
UV high
3
UV low
0
V3 UV
UV high
3
tlow min 2
3
4
tlow min 2
3
tlow min 2
tlow min 2
3
4
tlow min 2
3
11045
t
UV low
0
Uo1
th 1
5.1 V
4.875 V
2.0 V
0
t
th 1
t
Uci [V DC]
358
355
0
Input voltage failure
Output voltage monitoring
V2 UV
UV high
UV low
4
0
V3 UV
UV high
3
4
UV low
0
Switch-on cycle
Input voltage sag
4
t
tlow min 2
3
t
t
Switch-on cycle and subsequent
input voltage failure
Uo1
5.1 V
4.875 V
2.0 V
0
Ui
Uti + Uhi
Uti
0
Output voltage failure
Fig. 40
Relationship between Uci, Uo1, UV, IV and Uo1/Uo nom ver-
sus time.
t 1 VME request: minimum 4 ms
2 tlow min = 40...200 ms, typically 80 ms
3 UV level not defined at Uo1 < 2.0 V
4 The V signal drops simultaneously with the output voltage if the
pull-up resistor RP is connected to Vo1+.
The V signal remains high if RP is connected to an external
t source.
Edition 01/01.2001
26/27
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