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VIPER50BSP Datasheet

  • VIPER50BSP

  • SMPS PRIMARY I.C.

  • 20頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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VIPer50B
VIPer50BSP
SMPS PRIMARY I.C.
TARGET DATA
T YPE
VIPer50B/BSP
V
DSS
400 V
I
n
3 A
R
DS(on)
2.2
鈩?/div>
10
PENTAWATT HV
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
鈥滲LUE ANGEL鈥?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
BLOCK DIAGRAM
OSC
1
PowerSO-10
PENTAWATT HV
(022Y)
DESCRIPTION
VIPer50B made using VIPower M0 Technology
combines on the same silicon chip a
state-of-the-art PWM circuit together with an
optimized high voltage avalanche rugged Vertical
Power MOSFET (400 V / 3 A). Typical
applications cover off line power supplies with a
secondary power capability of 50W in a US mains
lines configuration. 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.
DRAIN
ON/OFF
OSCILLATOR
SECURITY
LATCH
V
DD
PWM
LATCH
S
R1 FF Q
R2 R3
UVLO
LOGIC
R/S
FF
S
Q
OVERTEMP.
DETECTOR
0.5V
_
+ +
_
0.5 V
ERROR
_ AMPLIFIER
13 V
+
+
_
1.7
s
DELAY
250 ns
BLANKING
1 V/A
CURRENT
AMPLIFIER
COMP
SOURCE
FC002 91B
4.5 V
December 1999
1/20

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