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VIPER20BSP Datasheet(PDF) 1 Page - STMicroelectronics

Part # VIPER20BSP
Description  SMPS PRIMARY I.C.
PDF  17 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER20BSP Datasheet(HTML) 1 Page - STMicroelectronics

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VIPer20B
VIPer20BSP
SMPS PRIMARY I.C.
PRELIMINARY DATA
®
September 1999
BLOCK DIAGRAM
VDD
OSC
COMP
DRAIN
SOURCE
13 V
UVLO
LOGIC
SECURITY
LATCH
PWM
LATCH
FF
FF
R/S
S
Q
S
R1
R2 R3
Q
OSCILLATOR
OVERTEMP.
DETECTOR
ERROR
AMPLIFIER
_
+
0.5 V
+
_
2
µs
delay
300 ns
Blanking
CURRENT
AMPLIFIER
ON/OFF
0.5V
6 V/A
_
+
+
_
4.5 V
T YPE
VDSS
In
RDS(on)
VIPer20B/ SP
400V
1.3 A
8.7
Ω
FEATURE
s
ADJUSTABLE SWITCHING FREQUENCY UP
TO 200KHZ
s
CURRENT MODE CONTROL
s
SOFT START AND SHUT DOWN CONTROL
s
AUTOMATIC BURST MODE OPERATION IN
STAND-BY CONDITION ABLE TO MEET
”BLUE ANGEL” NORM (1W TOTAL POWER
CONSUMPTION)
s
INTERNALLY TRIMMED ZENER
REFERENCE
s
UNDERVOLTAGE LOCK-OUT WITH
HYSTERESIS
s
INTEGRATED START-UP SUPPLY
s
AVALANCHE RUGGED
s
OVERTEMPERATURE PROTECTION
s
LOW STAND-BY CURRENT
s
ADJUSTABLE CURRENT LIMITATION
DESCRIPTION
VIPer20B
™ combines on the same silicon chip a
state-of-the-art PWM circuit together with an
optimized high voltage avalanche rugged Vertical
Power MOSFET (400V 1.3A).
Typical applications cover off line power supplies
with a secondary max power capability of 30W. It
is compatible from both primary or secondary
regulation loop despite using around 50% less
components when compared with a discrete
solution. Burst mode operation is an additional
feature of this device, offering the possibility to
operate
in
stand-by
mode
without
extra
components.
PENTAWATT HV
Power SO-10
1
10
1/17


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