L6565N

L6565N

L6565DTR Active

Quasi-resonant Controller
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2 (**)
GradeIndustrial
Package NameSO-8
Key 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

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.

In stock:
$0.86
Range Unit Price Savings
1 - 9$0.860%
10 - 99$0.7315%
100 - 499$0.5042%
500$0.4745%
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