VIPER50B Datasheet, PDF (1/20 Pages) STMicroelectronics – SMPS PRIMARY I.C.

VIPer50B
®
VIPer50BSP
TYPE
VIPer50B/BSP
V_DSS
400 V
I_n
R_DS(on)
3A
2.2 Ω
SMPS PRIMARY I.C.
TARGET DATA
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
10
PENTAWATT HV
1 _{PENTAWATT HV}
PowerSO-10
(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.
BLOCK DIAGRAM
OSC
DRAIN
ON/OFF
OSCILLATOR
SECURITY _PWM
LATCH
LATCH
VDD
UVLO
LOGIC
FF
R/S Q
S
R1 _FF Q
S
R2 R3
OVERTEMP.
DETECTOR
0.5 V +
_
ERROR
_ AMPLIFIER
13 V +
4.5 V
1.7 µ s
DELAY
250 ns
BLANKING
0.5V
++ ^_
_
1 V/A
CURRENT
AMPLIFIER
COMP
SOURCE
December 1999
1/20