VIPer50B
VIPer50BSP
SMPS PRIMARY I.C.
TARGET DATA
December 1999
BLOCK DIAGRAM
F
C
0
0
2
9
1
B
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_
+
0.5V
+
_
1.7 µ s
DELAY
250 ns
BLANKING
CURRENT
AMPLIFIER
ON/OFF
0.5V
1 V/A
_
+
+
_
4.5V
T YPE V
DSS
I
n
R
DS(on)
V IPer50B/B SP 400 V 3 A 2. 2 Ω
FEATURE
■ ADJUSTABLE SWITCHING FREQUENCY UP
TO 200KHZ
■ CURRENT MODE CONTROL
■ SOFT START AND SHUT DOWN CONTROL
■ AUTOMATIC BURST MODE OPERATION IN
STAND-BY CONDITION ABLE TO MEET
”BLUE ANGEL” NORM (<1W TOTAL POWER
CONSUMPTION)
■ INTERNALLY TRIMMED ZENER
REFERENCE
■ UNDERVOLTAGE LOCK-OUT WITH
HYSTERESIS
■ INTEGRATED START-UP SUPPLY
■ AVALANCHERUGGED
■ OVERTEMPERATURE PROTECTION
■ LOW STAND-BYCURRENT
■ ADJUSTABLE CURRENT LIMITATION
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
secondarypower 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.
PowerSO-10
1
10
PENTAWATT HV PENTAWATT HV
(022Y)
1/20
