CIRCUITO INTEGRADO L6565 QUASI-RESONANT SMPS CONTROLLER


CIRCUITO INTEGRADO L6565

10.000

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.
  • 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
SKU: ELEC001305 Categoría: Etiquetas: , , , , ,