VIPER50A-E Datasheet, PDF (1/31 Pages) STMicroelectronics – SMPS PRIMARY I.C.

VIPer50A-E
VIPer50ASP-E
SMPS PRIMARY I.C.
General Features
Type
VIPer50A-E/ASP-E
V_DSS
700V
I_n
1.5A
R_DS(on)
5.7Ω
10
1
■ ADJUSTABLE SWITCHING FREQUENCY UP
TO 200 kHz
■ CURRENT MODE CONTROL
■ SOFT START AND SHUTDOWN 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
■ OVER-TEMPERATURE PROTECTION
■ LOW STAND-BY CURRENT
■ ADJUSTABLE CURRENT LIMITATION
Block Diagram
PENTAWATT HV
POWERSO-10^TM
PENTAWATT HV (022Y)
Description
VIPer50A-E/ASP-E, made using VIPower M0
Technology, combines on the same silicon chip a
state-of-the-art PWM circuit together with an
optimized, high voltage, Vertical Power MOSFET
(700V/ 1.5A).
Typical applications cover offline power supplies
with a secondary power capability of 25W in wide
range condition and 50W in single range or with
doubler 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 ability to operate in stand-by mode
without extra components.
OSC
DRAIN
ON/OFF
OSCILLATOR
SECURITY PWM
LATCH
LATCH
VDD
UVLO
LOGIC
R/S ^FF 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
++ ^_
_
2 V/A
CURRENT
AMPLIFIER
September 2005
COMP
SOURCE
Rev 1
1/31
www.st.com
31