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L6219ST SOIC
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LM11172.5ST SOT223

L6565ST SOIC

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.

Converter’s power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant.

The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection.

SKU: L6565D Category:
Description

All features

  • TV/MONITOR SMPS
  • BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT
  • DIGITAL CONSUMER
  • AC-DC ADAPTERS/CHARGERS
  • PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS
  • 1% PRECISION (@ Tj = 25˚C) INTERNAL REFERENCE VOLTAGE
  • DISABLE FUNCTION (ON/OFF CONTROL)
  • QUASI-RESONANT (QR) ZERO-VOLTAGE-SWITCHING (ZVS) TOPOLOGY
  • FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY
  • LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE
  • ULTRA-LOW START-UP (< 70µA) AND QUIESCENT CURRENT (< 3.5mA)
  • ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
  • PULSE-BY-PULSE & HICCUP-MODE OCP
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