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PDF VIPER53EDIP Data sheet ( Hoja de datos )
| Número de pieza | VIPER53EDIP | |
| Descripción | STATE OF THE ART PRIMARY SIDE SWITCH FOR AC/DC CONVERTERS | |
| Fabricantes | STMicroelectronics | |
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VIPER53EDIP
VIPER53ESP
OFF LINE PRIMARY SWITCH
Table 1. TYPICAL OUTPUT POWER
CAPABILITY
TYPE
European US / Wide range
(195 - 265 Vac) (85 - 265 Vac)
VIPer53EDIP
50W
30W
VIPer53ESP
65W
40W
Note : Above power capabilities are given under adequate
thermal conditions
Figure 1. Package
PRELIMINARY DATA
s SWITCHING FREQUENCY UP TO 300 KHZ
10
s CURRENT MODE CONTROL WITH
ADJUSTABLE CURRENT LIMITATION
s SOFT START AND SHUT DOWN CONTROL
DIP-8
1
PowerSO-10™
s AUTOMATIC BURST MODE IN STAND-BY
CONDITION (“BLUE ANGEL” COMPLIANT)
s UNDERVOLTAGE LOCKOUT WITH
HYSTERESIS
s INTEGRATED STARTUP CURRENT SOURCEwww.DataSheet4U.com
Typical applications cover off line power supplies
s OVERTEMPERATURE PROTECTION
with a secondary power capability ranging up to
s OVERLOAD AND SHORT-CIRCUIT
CONTROL
s OVERVOLTAGE PROTECTION
30W in wide range input voltage or 50W in single
European voltage range and DIP-8 package, with
the following benefits:
– Overload and short circuit controlled by
feedback monitoring and delayed device reset.
DESCRIPTION
The VIPer53E combines in the same package an
enhanced current mode PWM controller with a
high voltage MDMesh Power Mosfet.
– Efficient standby mode by enhanced pulse
skipping.
Integrated startup current source disabled during
the normal operation to reduce the input power.
Table 2. Order Codes
Package
DIP-8
PowerSO-10™
Tube
VIPer53EDIP
VIPer53ESP
Tape And Reel
-
VIPer53ESP13TR
September 2004
Rev. 1
1/22
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
1 page  
VIPER53EDIP / VIPER53ESP
ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=13V, unless otherwise specified)
Table 8. Supply Section
Symbol
Parameter
Test Conditions
VDSstart
Drain Voltage Starting
Threshold
VDD=5V; IDD=0mA
IDDch1 Startup Charging Current VDD=0 ... 5V; VDS=100V (See figure 6)
IDDch2 Startup Charging Current VDD=10V; VDS=100V (See figure 6)
IDDchoff
Startup Charging Current VDD=5V; VDS=100V
in Thermal Shutdown
Tj > TSD - THYST
(See figure 8)
IDD0
Operating Supply Current
Not Switching
Fsw=0kHz; VCOMP=0V
IDD1
Operating Supply Current
Switching
Fsw=100kHz
VDDoff
VDD Undervoltage
Shutdown Threshold
(See figure 6)
VDDon VDD Startup Threshold (See figure 6)
VDDhyst
VDD Threshold
Hysteresis
(See figure 6)
VDDovp
VDD Overvoltage
Shutdown Threshold
(See figure 8)
Min.
0
7.5
10.2
2.6
17
Typ.
34
-12
-2
8
9
8.4
11.5
3.1
18
Max.
50
11
9.3
12.8
19
Unit
V
mA
mA
mA
mA
mA
V
V
V
V
Table 9. Pwm Comparator Section
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
HCOMP ∆VCOMP / ∆IDPEAK
VCOMP=1 ... 4 V
dID/dt=0
(See figure 8)
1.7 2 2.3 V/A
VCOMPos VCOMP Offset
dID/dt=0
(See figure 8)
0.5
V
IDlim
Peak Drain Current
Limitation
ICOMP=0mA; VTOVL=0V (See figure 8)
dID/dt=0
1.7 2 2.3 A
IDmax
Drain Current Capability
VCOMP=VCOMPovl; VTOVL=0V
dID/dt=0
(See figure 8)
1.6
1.9
2.3
A
td
Current Sense Delay to
Turn-Off
ID=1A
250 ns
VCOMPbl
VCOMP Blanking Time
Change Threshold
(See figure 7)
1V
tb1 Blanking Time
VCOMP < VCOMPBL
(See figure 7) 300 400 500
ns
tb2 Blanking Time
VCOMP > VCOMPBL
(See figure 7) 100 150 200
ns
tONmin1 Minimum On Time
VCOMP < VCOMPBL
450 600 750
ns
tONmin2 Minimum On Time
VCOMP > VCOMPBL
250 350 450
ns
VCOMPoff
VCOMP Shutdown
Threshold
(See figure 8)
0.5 V
VCOMPhi VCOMP High Level
ICOMP=0mA
(See note 5)
4.5
V
ICOMP COMP Pull Up Current VCOMP=2.5V
0.6 mA
Note: 6. In order to insure a correct stability of the error amplifier, a capacitor of 10nF (minimum value: 8nF) should always be present on
the COMP pin.
5/22
5 Page 
VIPER53EDIP / VIPER53ESP
Figure 16: Off Line Power Supply With Optocoupler Feedback
F1
AC IN
C1
R1
T1
D1
C2
R4
R3
OSC
VDD
DRAIN
CONTROL
C4
COMP
TOVL
SOURCE
C5
C12
10nF
R5
R9
1k
C7 C6
R2
C3
D2
T2
L1
D4
D3 C8 C9
DC OUT
C10
R8
U2
C11
R7
U3
R6
SECONDARY FEEDBACK CONFIGURATION
EXAMPLE
The secondary feedback is implemented through
an optocoupler driven by a programmable zener of
the TL431 type as shown on figure 11.
The optocoupler is connected in parallel with the
compensation network on the COMP pin which
delivers a constant biasing current of 0.6 mA to the
optotransistor. This current doesn’t depend on the
compensation voltage, and so it doesn’t depend
on the output load either. The gain of the
optocoupler ensures consequently a constant
biasing of the TL431 device (U3) which is in
charge of secondary regulation. If the optocoupler
gain is sufficiently low, no additional components
are required to ensure a minimum current biasing
of U3. Also, the low biasing current value avoid
any ageing of the optocoupler.
The constant current biasing can be used to
simplify the secondary circuit: Instead of a TL431,
a simple zener and resistance network in series
with the optocoupler diode can insure a good
secondary regulation. As the current flowing in this
branch remains constant for the same reason as
above, typical load regulation of 1% can be
achieved from zero to full output current with this
simple configuration.
Since the dynamic characteristics of the converter
are set on the secondary side through
components associated to U3, the compensation
network has only a role of gain stabilization for the
optocoupler, and its value can be freely chosen.
R5 can be set to a fixed value of 2.2 kΩ, offering
the possibility of using C7 as a soft start capacitor:
When starting up the converter, the VIPer53E
device delivers a constant current of 0.6 mA on the
COMP pin, creating a constant voltage of 1.3 V in
R5 and a rising slope across C7. This voltage
shape together with the operating range of 0.5 V to
4.5 V provides a soft startup of the converter. The
rising speed of the output voltage can be set
through the value of C7. C4 and C6 values must
be adjusted accordingly in order to ensure a
correct startup.
11/22
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