VIPER53-E Datasheet, PDF (1/36 Pages) STMicroelectronics – OFF-line primary switch

VIPer53 - E
OFF-line primary switch
General features
Type
European
(195 - 265Vac)
DIP-8
50W
PowerSO-10^TM
65W
US / Wide range
(85 - 265 Vac)
30W
40W
PowerSO-10
DIP-8
Features
■ Switching frequency up to 300kHz
■ Current limitation
■ Current mode control with adjustable limitation
■ Soft start and shut-down control
■ Automatic burst mode in standby condition
(“Blue Angel“ compliant )
■ Undervoltage lockout with Hysteresis
■ HIgh voltage star-tup current source
■ Overtemperature protection
■ Overload and short-circuit control
Block diagram
Description
The VIPer53-E combines an enhanced current
mode PWM controller with a high voltage
MDMesh Power Mosfet in the same package.
Typical applications cover offline 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 benefits:
■ Overload and short circuit controlled by
feedback monitoring and delayed device reset.
■ Efficient standby mode by enhanced pulse
skipping.
■ Primary regulation or secondary loop failure
protection through high gain error amplifier.
OSC
DRAIN
O N/O FF
OSCILLAT OR
VDD
UVLO
C O MPARATO R
8.4/
11.5V
15V
ERROR
AMPLIFIER
O VER VO LTAGE
C O MPARATO R
18V
OVERT EMP.
DET ECT OR
PWM
LATCH
R1 ^S
FF Q
R2
R3 R4 R5
0.5V
STANDBY
COMPARATOR
4.35V
OVERLOAD
COMPARATOR
BLANKING TIME
SELECTION
1V
150/400ns
BLANKING
PW M
C O MPAR ATO R
4V
8V
125k
0.5V
H_{COM P}
CURRENT
AMPLIFIER
4.5V
November 2006
Rev 1
T OVL
COMP
SOURCE
1/36
www.st.com
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