Operation description VIPer20A-E
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Figure 11. Behaviour of the high voltage current source at start-up
Figure 12. Start-up waveforms
Ref.
UNDERVOLTAGE
LOCK OUT LOGIC
15 mA1 mA
3 mA
2 mA
15 mA
VDD
DRAIN
SOURCE
VIPer20
Auxiliary primary
winding
VDD
t
VDDoff
VDDon
Start up duty cycle ~ 12%
CVDD
FC00101A
