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VIPER50SP Datasheet(PDF) 15 Page - STMicroelectronics

Part # VIPER50SP
Description  SMPS PRIMARY I.C.
Download  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER50SP Datasheet(HTML) 15 Page - STMicroelectronics

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VIPer50/SP - VIPer50A/ASP
COMP pin in order to limit the primary peak current
of the device to a value:
where:
The suggested value for R1+R2 is in the range of
220K
Ω.
OVER-TEMPERATURE PROTECTION:
Over-temperature protection is based on chip
temperature
sensing.
The
minimum junction
temperature at which over-temperature cut-out
occurs is 140ºC while the typical value is 170ºC.
The device is automatically restarted when the
junction temperature decreases to the restart
temperature threshold that is typically 40ºC below
the shutdown value (see figure 8).
I
DPEAK
V
COMP
0.5
–
H
ID
-------------------------------------
=
V
COMP
0.6
R
1
R
2
+
R
2
----------------------
×
=
Figure 18: Typical Compensation Network
Figure 20: External Clock Synchronization
Figure 19: Slope Compensation
Figure 21: Current Limitation Circuit Example
-
+
13V
OSC
COMP
SOURCE
DRAIN
VDD
VIPer50
R1
C1
FC00351
C2
-
+
13V
OSC
COM P
SO U RCE
DRAIN
VD D
VIPer50
R1
R2
Q1
C2
C1
R3
FC 00361
C3
-
+
13V
OSC
COMP SOURCE
DRAIN
VDD
VIPer50
10 k
Ω
FC00370
-
+
13V
OSC
COMP
SOURCE
DRAIN
VDD
VIPer50
R1
R2
Q1
FC00380


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