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LNK520P-TL Scheda tecnica(PDF) 2 Page - Power Integrations, Inc.

Il numero della parte LNK520P-TL
Spiegazioni elettronici  Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers
PDF  20 Pages
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Produttore elettronici  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

LNK520P-TL Scheda tecnica(HTML) 2 Page - Power Integrations, Inc.

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LNK520
E
2/05
Pin Functional Description
DRAIN (D) Pin:
Power MOSFET drain connection. Provides internal operating
current for start-up. Internal current limit sense point for drain
current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
and current limit control. Internal shunt regulator connection
to provide internal bias current during normal operation. It is
also used as the connection point for the supply bypass and
auto-restart/compensation capacitor.
SOURCE (S) Pin:
Output MOSFET source connection for high voltage power
return. Primary side control circuit common and reference
point.
Figure 3. Pin Configuration.
Figure 2. Block Diagram.
PI-2777-032503
SHUTDOWN/
AUTO-RESTART
PWM
COMPARATOR
CLOCK
SAW
OSCILLATOR
INTERNAL
SUPPLY
5.6 V
4.7 V
SOURCE
S
R
Q
DMAX
-
+
CONTROL
-
+
5.6 V
IFB
Z C
VC
+
-
EDGE
0
1
HYSTERETIC
THERMAL
SHUTDOWN
LEADING
EDGE
BLANKING
CURRENT
LIMIT
ADJUST
LOW
FREQUENCY
OPERATION
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN
IDCS
CURRENT LIMIT
COMPARATOR
RE
÷ 8
PI-3790-121503
S
D
S
S
S
C
5
7
8
S
4
2
3
1
P Package (DIP-8B)
G Package (SMD-8B)
LNK520



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