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LNK500G Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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LNK500G Datasheet(HTML) 2 Page - Power Integrations, Inc. |
2 / 20 page 2 LNK500 B 3/03 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. PI-3417-111802 S D S S S C 5 7 8 S 4 2 3 1 P Package (DIP-8B) G Package (SMD-8B) LNK500 Figure 2. Block Diagram. PI-3416-032603 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 |
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Similar Description - LNK500G |
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