VIPER15 STMicroelectronics, VIPER15 Datasheet - Page 17

• Manufacturer Part Number: VIPER15
• Description: VIPerPlus family: quasi-resonant high performance off line high voltage converter
• Manufacturer: STMicroelectronics

VIPER15
As soon as the output voltage reaches the regulated value, the regulation loop takes over
and the drain current is regulated below its limit, I
at a value lower than the threshold V
Figure 22. I
Figure 23. Timing diagram: normal power-up and power-down sequences
V
V
I
DRAIN_START
DD(RESTART)
DDch
V
DRAIN
V
(3mA)
I
V
DDch
DDoff
DDon
V
V
I
DD
DD
IN
V
(-3 mA)
DRAIN
V
V
V
V
V
V
V
FBolp
FBbm
I
DDon
DDoff
FBlin
I
I
DD
DD1
DD0
DD
START- UP
FB
DD
current during start-up and burst mode
Power-on
NORMAL MODE
Doc ID 15455 Rev 5
FBlin
Normal operation
Dlim
BURST MODE
, by the feedback voltage, which settles
regulation is lost here
Power-off
Operation description
V
HV startup is no more activated
IN
< V
DRAIN_START
NORMAL MODE
t
t
t
t
V
time
time
time
time
FBbmhys
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