VIPER20A-E Datasheet, PDF (1/34 Pages) STMicroelectronics – SMPS primary I.C.

VIPer20A-E
SMPS primary I.C.
General features
Type
VIPer20A-E
VIPer20ASP-E
VIPer20ADIP-E
V_DSS
700V
700V
700V
I_n
R_DS(on)
0.5A 18Ω
0.5A 18Ω
0.5A _18Ω
■ 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
DIP-8
PENTAWATT HV (022Y)
10
1
POWERSO-10^TM
Description
All the devices are 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/ 0.5A).
Typical applications cover offline power supplies
with a secondary power capability of 10W in wide
range condition and 20W 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
June 2006
VDD
ON/OFF
OSCILLATOR
UVLO
LOGIC
SECURITY
LATCH
R/S ^FF Q
S
PWM
LATCH
S
R1 FF Q
R2 R3
OVERTEMP.
DETECTOR
0.5 V +
_
ERROR
AMPLIFIER
_
13 V +
4.5 V
1.7
µs
delay
250 ns
Blanking
COMP
Rev 2
0.5V
++ ^_
6 V/A
_
CURRENT
AMPLIFIER
SOURCE
1/34
www.st.com
34