September 2002
1/15
VIPer22ADIP
VIPer22AS
LOW POWER OFF LINE SMPS PRIMARY SWITCHER
TYPICAL POWER CAPABILITY
n
FIXED 60 KHZ SWITCHING FREQUENCY
n
9V TO 38V WIDE RANGE VDD VOLTAGE
n
CURRENT MODE CONTROL
n
AUXILIARY UNDERVOLTAGE LOCKOUT
WITH HYSTERESIS
n
HIGH VOLTAGE START UP CURRENT
SOURCE
n
OVERTEMPERATURE, OVERCURRENT AND
OVERVOLTAGE PROTECTION WITH
AUTORESTART
DESCRIPTION
The VIPer22A 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
DIP-8
European
(195 - 265 Vac)
12 W
20 W
US / Wide range
(85 - 265 Vac)
7 W
12 W
ORDER CODES
PACKAGE
TUBE
T&R
SO-8
VIPer22AS
VIPer22AS
13TR
DIP-8
VIPer22ADIP
-
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
VIPer22ADIP / VIPer22AS
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
VIPer22A
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
VIPer22ADIP / VIPer22AS
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 mm of Cu (at least 35
m thick) connected to all DRAIN pins.
ELECTRICAL CHARACTERISTICS (T
j
=25C, 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 ... 125C)
(See note 1)
-0.3 ... 730
V
V
DS(st)
Start Up Drain Source Voltage (T
j
=25 ... 125C)
(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
DIP-8
25
15
C/W
Rthj-amb
Thermal Resistance Junction-Ambient for :
SO-8
(See note 1)
DIP-8
(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
=125C
0.1
mA
R
DSon
Static Drain-Source
On State Resistance
I
D
=0.4A
I
D
=0.4A; T
j
=100C
15
17
31
t
f
Fall Time
I
D
=0.2A; V
IN
=300V
(See fig.1)
(See note 1)
100
ns
t
r
Rise Time
I
D
=0.4A; V
IN
=300V
(See fig.1)
(See note 1)
50
ns
C
oss
Drain Capacitance
V
DS
=25V
40
pF
VIPer22ADIP / VIPer22AS
4/15
ELECTRICAL CHARACTERISTICS (T
j
=25C, V
DD
=18V, unless otherwise specified)
SUPPLY SECTION
Note: 1. These test conditions obtained with a resistive load are leading to the maximum conduction time of the device.
OSCILLATOR SECTION
PWM COMPARATOR SECTION
OVERTEMPERATURE SECTION
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
DDch
Start Up Charging
Current
V
DS
=100V; V
DD
=0V ...V
DDon
(See fig. 2)
-1
mA
I
DDoff
Start Up Charging
Current
in Thermal Shutdown
V
DD
=5V; V
DS
=100V
T
j
> T
SD
- T
HYST
0
mA
I
DD0
Operating Supply Current
Not Switching
I
FB
=2mA
3
5
mA
I
DD1
Operating Supply Current
Switching
I
FB
=0.5mA; I
D
=50mA
(Note 1)
4.5
mA
D
RST
Restart Duty Cycle
(See fig. 3)
16
%
V
DDoff
V
DD
Undervoltage
Shutdown Threshold
(See fig. 2 & 3)
7
8
9
V
V
DDon
V
DD
Start Up Threshold
(See fig. 2 & 3)
13
14.5
16
V
V
DDhyst
V
DD
Threshold
Hysteresis
(See fig. 2)
5.8
6.5
7.2
V
V
DDovp
V
DD
Overvoltage
Threshold
38
42
46
V
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
F
OSC
Oscillator Frequency
Total Variation
V
DD
=V
DDoff
... 35V; T
j
=0 ... 100C
54
60
66
kHz
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
G
ID
I
FB
to I
D
Current Gain
(See fig. 4)
560
I
Dlim
Peak Current Limitation
V
FB
=0V
(See fig. 4)
0.56
0.7
0.84
A
I
FBsd
I
FB
Shutdown Current
(See fig. 4)
0.9
mA
R
FB
FB Pin Input Impedance
I
D
=0mA
(See fig. 4)
1.2
k
t
d
Current Sense Delay to
Turn-Off
I
D
=0.4A
200
ns
t
b
Blanking Time
500
ns
t
ONmin
Minimum Turn On Time
700
ns
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
T
SD
Thermal Shutdown
Temperature
(See fig. 5)
140
170
C
T
HYST
Thermal Shutdown
Hysteresis
(See fig. 5)
40
C
VIPer22ADIP / VIPer22AS
5/15
Figure 1 : Rise and Fall Time
Figure 2 : Start Up VDD Current
Figure 3 : Restart Duty Cycle
I
D
V
DS
90%
10%
t
fv
t
rv
t
t
L
D
300V
C
FB
VDD
DRAIN
SOURCE
CONTROL
VIPer22A
C << Coss
V
DD
V
DDhyst
V
DDoff
V
DDon
I
DD0
I
DDch
V
DS
= 100 V
F
sw
= 0 kHz
I
DD
t
V
DD
V
DDoff
V
DDon
t
CH
t
ST
D
RST
t
S T
t
ST
t
CH
+
-------------------------
=
100V
10
F
FB
VDD
DRAIN
SOURCE
CONTROL
VIPer22A
2V
PDF 
ZIP