L6565D Integrated Circuit Chip QUASI - RESONANT SMPS CONTROLLER

L6565

QUASI-RESONANT SMPS CONTROLLER

■ 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 (< 70µA) 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

APPLICATIONS

■ TV/MONITOR SMPS

■ AC-DC ADAPTERS/CHARGERS

■ DIGITAL CONSUMER

■ PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS

DESCRIPTION

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.

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Stock Offer (Hot Sell)

CHONGMING GROUP (HK) INT'L CO., LTD. located in Hong Kong and Shenzhen. We are an independent Distributor of Electronic Components,established in 2008. AS a growing fast company, CM GROUP is renowned for its world-class efficiency, excellent services, and extraordinary ability to supply electronic components that are hard to find and even obsolete. We have taken pride in our innovation, reliability and service, especially in the semiconductor marketplace.
Our distribution brands include XILINX，ALTERA，ATMEL, INFINEON, ST,SAMSUNG，TEXAS INSTRUMENTS，ON，TOSHIBA，，MICROCHIP，CYPRESS，FREESCALE，etc. We distributes over 200,000 products ranging from semiconductors to resistors, capacitors, diodes, inductors, connectors, transistors, sensors and so on.
Our mission is to meet and exceed all the expecations of what we supply to customers.