November 2003 1/15
VIPer12ADIP
VIPer12AS
LOW POWER OFF LINE SMPS PRIMARY SWITCHER
®
TYPICAL POWER CAPABILITY
FIXED 60 KHZ SWITCHING FREQUENCY
9V TO 38V WIDE RANGE V
DD
VOLTAGE
CURRENT MODE CONTROL
AUXILIARY UNDERVOLTAGE LOCKOUT
WITH HYSTERESIS
HIGH VOLTAGE START UP CURRENT
SOURCE
OVERTEMPERATURE, OVERCURRENT AND
OVERVOLTAGE PROTECTION WITH
AUTORESTART
DESCRIPTION
The VIPer12A combines a dedicated current mode
PWM controller with a high voltage Power
MOSFET on the same silicon chip. Typical
applications cover off line power supplies for
battery charger adapters, standby power supplies
for TV or monitors, auxiliary supplies for motor
control, etc. The internal control circuit offers the
following benefits:
Large input voltage range on the V
DD
pin
accommodates changes in auxiliary supply
voltage. This feature is well adapted to battery
charger adapter configurations.
Automatic burst mode in low load condition.
Overvoltage protection in hiccup mode.
Mains type SO-8 DIP8
European
(195 - 265 Vac)
8 W 13 W
US / Wide range
(85 - 265 Vac)
5 W 8 W
ORDER CODES
PACKAGE TUBE T&R
SO-8 VIPer12AS VIPer12AS13TR
DIP-8 VIPer12ADIP
SO-8 DIP-8
BLOCK DIAGRAM
ON/OFF
0.23 V
DRAIN
SOURCE
VDD
PWM
LATCH
60kHz
OSCILLATOR
BLANKING
+
_
8/14.5V
_
+
FF
S
R1
R4
Q
R3
FB
REGULATOR
INTERNAL
SUPPLY
OVERVOLTAGE
LATCH
OVERTEMP.
DETECTOR
1 k
42V
_
+
R2
FF
S
R
Q
230
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
VIPer12ADIP / VIPer12AS
2/15
PIN FUNCTION
CURRENT AND VOLTAGE CONVENTIONS
CONNECTION DIAGRAM
Name Function
V
DD
Power supply of the control circuits. Also provides a charging current during start up thanks to a high
voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the
V
DD
voltage and provides two thresholds:
- V
DDon
: Voltage value (typically 14.5V) at which the device starts switching and turns off the start up
current source.
- V
DDoff
: Voltage value (typically 8V) at which the device stops switching and turns on the start up current
source.
SOURCE Power MOSFET source and circuit ground reference.
DRAIN
Power MOSFET drain. Also used by the internal high voltage current source during start up phase for
charging the external V
DD
capacitor.
FB
Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak drain MOSFET
current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin
shorted to the SOURCE pin.
I
DD
I
D
I
FB
V
DD
V
FB
V
D
FB
VDD DRAIN
SOURCE
CONTROL
VIPer12A
1
2
3
4
DRAIN
DRAIN
DRAIN
DRAIN
8
7
6
5
DRAIN
DRAIN
DRAIN
DRAIN
1
2
3
4
8
7
6
5
FB
VDD
SOURCE
FB
VDD
SOURCE
SOURCE SOURCE
SO-8 DIP8
Obsolete Product(s) - Obsolete Product(s)
VIPer12ADIP / VIPer12AS
3/15
ABSOLUTE MAXIMUM RATINGS
Note: 1. This parameter applies when the start up current source is off. This is the case when the V
DD
voltage has reached V
DDon
and
remains above V
DDoff
.
2. This parameter applies when the start up current source is on. This is the case when the V
DD
voltage has not yet reached V
DDon
or has fallen below V
DDoff
.
THERMAL DATA
Note: 1. When mounted on a standard single-sided FR4 board with 200 mm² of Cu (at least 35 µm thick) connected to all DRAIN pins.
ELECTRICAL CHARACTERISTICS (T
j
=25°C, V
DD
=18V, unless otherwise specified)
POWER SECTION
Note: 1. On clamped inductive load
Symbol Parameter Value Unit
V
DS(sw)
Switching Drain Source Voltage (T
j
=25 ... 125°C) (See note 1)
-0.3 ... 730 V
V
DS(st)
Start Up Drain Source Voltage (T
j
=25 ... 125°C) (See note 2)
-0.3 ... 400 V
I
D
Continuous Drain Current Internally limited A
V
DD
Supply Voltage 0 ... 50 V
I
FB
Feedback Current 3 mA
V
ESD
Electrostatic Discharge:
Machine Model (R=0; C=200pF)
Charged Device Model
200
1.5
V
kV
T
j
Junction Operating Temperature Internally limited °C
T
c
Case Operating Temperature -40 to 150 °C
T
stg
Storage Temperature -55 to 150 °C
Symbol Parameter Max Value Unit
Rthj-case
Thermal Resistance Junction-Pins for:
SO-8
DIP8
25
15
°C/W
Rthj-amb
Thermal Resistance Junction-Ambient for:
SO-8 (See note 1)
DIP8 (See note 1)
55
45
°C/W
Symbol Parameter Test Conditions Min. Typ. Max. Unit
BV
DSS
Drain-Source Voltage
I
D
=1mA; V
FB
=2V
730 V
I
DSS
Off State Drain Current
V
DS
=500V; V
FB
=2V; T
j
=125°C
0.1 mA
R
DSon
Static Drain-Source
On State Resistance
I
D
=0.2A
I
D
=0.2A; T
j
=100°C
27 30
54
t
f
Fall Time
I
D
=0.1A; V
IN
=300V (See fig.1)
(See note 1)
100 ns
t
r
Rise Time
I
D
=0.2A; V
IN
=300V (See fig.1)
(See note 1)
50 ns
C
oss
Drain Capacitance
V
DS
=25V
40 pF

VIPER12AS

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
AC/DC Converters 700V 0.36A SMPS DISC-BY-STM-12/04
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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