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The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters.
Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET's turn-on.
L6565D Maximum Ratings
Symbol
Pin
Parameter
Value
Unit
IVcc
8
ICC + IZ
30
mA
IGD
7
Output Totem Pole Peak Current (2 s)
±700
mA
INV, COMP, VFF, CS
1, 2, 3 4
Analog Inputs & Outputs
-0.3 to 7
V
IZCD
5
Zero Current Detector
50 (source) -10 (sink)
mA
Ptot
Power Dissipation @Tamb = 50 °C (Minidip) (SO8)
1 0.65
W
Tj
Junction Temperature Operating range
-40 to 150
°C
Tstg
Storage Temperature
-55 to 150
°C
L6565D Features
` QUASI-RESONANT (QR) ZERO-VOLTAGESWITCHING (ZVS) TOPOLOGY ` LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE ` FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY ` PULSE-BY-PULSE & HICCUP-MODE OCP ` ULTRA-LOW START-UP (< 70A) AND QUIESCENT CURRENT (< 3.5mA) ` DISABLE FUNCTION (ON/OFF CONTROL) ` 1% PRECISION (@ Tj = 25°C) INTERNAL REFERENCE VOLTAGE ` ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN ` BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT
L6565D Typical Application
· TV/MONITOR SMPS · AC-DC ADAPTERS/CHARGERS · DIGITAL CONSUMER · PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS