PowerSO-10鈩?/div>
FEATURES
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SWITCHING FREQUENCY UP TO 300 kHz
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CURRENT LIMITATION
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CURRENT MODE CONTROL WITH
ADJUSTABLE LIMITATION
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SOFT START AND SHUT DOWN CONTROL
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AUTOMATIC BURST MODE IN STAND-BY
CONDITION (鈥淏LUE ANGEL鈥?COMPLIANT)
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UNDERVOLTAGE LOCKOUT WITH
HYSTERESIS
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HIGH VOLTAGE STARTUP CURRENT
SOURCE
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OVERTEMPERATURE PROTECTION
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OVERLOAD AND SHORT-CIRCUIT CONTROL
BLOCK DIAGRAM
OSC
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 benefits:
鈥?Overload and short circuit controlled by
feedback monitoring and delayed device reset.
鈥?Efficient standby mode by enhanced pulse
skipping.
鈥?Primary regulation or secondary loop failure
protection through high gain error amplifier.
DRAIN
ON/OFF
OSCILLATOR
PWM
LATCH
OVERTEMP.
DETECTOR
R1
R2
R3
UVLO
COMPARATOR
VDD
8.4/
11.5V
0.5V
STANDBY
COMPARATOR
4V
150/400ns
BLANKING
PWM
COMPARATOR
8V
S
FF
R4
Q
R5
0.5V
H
COMP
BLANKING TIME
SELECTION
1V
CURRENT
AMPLIFIER
15V
ERROR
AMPLIFIER
125k
4.35V
OVERLOAD
COMPARATOR
OVERVOLTAGE
COMPARATOR
18V
4.5V
TOVL
COMP
SOURCE
June 2004
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