June 2004 1/24
VIPer53DIP
VIPer53SP
OFF LINE PRIMARY SWITCH
®
TYPICAL OUTPUT POWER CAPABILITY
Note: Above power capabilities are given under adequate
thermal conditions
FEATURES
SWITCHING FREQ UENCY UP TO 300 kHz
CURRENT LIMITATION
CURRENT MODE CONTROL WITH
ADJUSTABLE LIMITATION
SOFT START AN D SHUT DOWN CONTROL
AUTOMATIC BURST MO DE IN STAND-BY
CONDITION (“BLUE ANGEL” COMPLIA NT)
UNDERVOLTAGE LOCKOUT WITH
HYSTERESIS
HIGH VO LTAG E STARTUP CURRENT
SOURCE
OVERTEMPER ATURE PR O TECTION
OVERLOAD AND SHORT-CIRCUI T CONTROL
DESCRIPTION
The VIPer53 combines in the same package an
enhanced current mode PWM controller with a
high voltage MDMesh Power Mosfet. Typical
applications cover off line power supplies with a
secondary power capability ranging up to 30W in
wide range input voltage or 50W in single
European voltage range and DIP-8 package, with
the following benefit s:
– Overload and short circuit controlled by
feedback monitoring and delayed device r eset.
– Efficient standby mode by enhanced pulse
skipping.
– Primary regulation or secondary loop failure
protection through high gain error amplifier.
TYPE
European
(195 - 265 Vac)
US / Wide range
(85 - 265 Vac)
DIP-8 50W 30W
PowerSO-10
™
65W 40W
1
10
DIP-8
PowerSO-10™
BLOCK DIAGRAM
FF
OSCILLATOR
150/400ns
BLANKING
1V
4V
OVERTEMP.
DETECTOR
8.4/
11.5V
15V
0.5V
VDD
OSC DRAIN
TOVL COMP SOURCE
PWM
LATCH
ON/OFF
BLANKING TIME
SELECTION
PWM
COMPARATOR
CURRENT
AMPLIFIER
S
R1
R2
R3 R4 R5
Q
8V
4.35V
OVERLOAD
COMPARATOR
18V
4.5V
125k
0.5V
STANDBY
COMPARATOR
OVERVOLTAGE
COMPARATOR
ERROR
AMPLIFIER
UVLO
COMPARATOR
H
COMP
