VIPER17 STMicroelectronics, VIPER17 Datasheet - Page 16

• Manufacturer Part Number: VIPER17
• Description: VIPerPlus family: fixed frequancy high performance off line high voltage converter
• Manufacturer: STMicroelectronics

Operation descriptions
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Figure 23. Timing diagram: normal power-up and power-down sequences
Figure 24. Soft-start: timing diagram
V
V
I
DRAIN_START
DD(RESTART)
DDch
V
DRAIN
V
(3mA)
V
DDoff
DDon
V
V
I
DD
DD
IN
Power-on
I
DRAIN
V
V
V
I
Dlim
V
FBolp
FBlin
OUT
FB
t
SS
( SOFT START- UP )
Doc ID 14419 Rev 7
Normal operation
DELAY (OLP)
STEADY STATE
regulation is lost here
Power-off
V
HV startup is no more activated
t
t
t
IN
< V
DRAIN_START
time
time
time
time
VIPER17