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Part Name
Description
VIPER28 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
VIPER28
Off-line high voltage converters
STMicroelectronics
VIPER28 Datasheet PDF : 32 Pages
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VIPER28
1
Block diagram
Block diagram
Figure 2. Block diagram
EP
T
T
ovl
CONT
LEB
E
T
P
o
T
v l
BLOCK
OLP
SOFT
START
OCP
BLOCK
OVP DETECTION
LOGIC
PWM
BLOCK
OVP
FB
VDD
DRAIN
OSCILLATOR
OCP
+
PWM
-
+
-
Disable
Internal Supply bus
&
Ref erence Voltages
SUPPLY
& UVLO
UVLO
BURST
TURN-ON
LOGIC
LEB
S
Q
R
2nd OCP
2nd OCP
LOGIC
HV_ON
I
DDch
THERMAL
SHUTDOWN
OTP
QS
R
HV_ON
OTP OVP OLP
BURST-MODE
LOGIC
BURST
Rsense
GND
2
Typical power
Table 2. Typical power
Part number
230 V
AC
Adapter
(1)
Open frame
(2)
85-265 V
AC
Adapter
(1)
Open frame
(2)
VIPER28
18 W
20 W
10 W
12 W
1. Typical continuous power in non ventilated enclosed adapter measured at 50 °C ambient.
2. Maximum practical continuous power in an open frame design at 50 °C ambient, with adequate heat sinking.
Doc ID 15028 Rev 5
3/32
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