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VIPER27LN Datasheet(PDF) 16 Page - STMicroelectronics

Part # VIPER27LN
Description  Off-line high voltage converters
PDF  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER27LN Datasheet(HTML) 16 Page - STMicroelectronics

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Operation descriptions
VIPER27
16/31
Doc ID 15133 Rev 5
Figure 23.
Timing diagram: normal power-up and power-down sequences
Figure 24.
Soft-start: timing diagram
I
DD
V
DD
V
DRAIN
V
DDon
time
V
IN
V
DRAIN_START
Power-on
Power-off
Normal operation
regulation is lost here
V
IN < VDRAIN_START
HV startup is no more activated
V
DDoff
V
DD(RESTART)
I
DDch (3mA)
time
time
time
t
SS
( SOFT START- UP )
STEADY STATE
VFB
V
FBlin
V
FBolp
IDRAIN
I
Dlim
V
OUT
DELAY (OLP)
t
t
t



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