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L6565D Integrated Circuit Chip QUASI - RESONANT SMPS CONTROLLER

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L6565D Integrated Circuit Chip QUASI - RESONANT SMPS CONTROLLER

Model Number L6565D
Certification new & original
Place of Origin original factory
Minimum Order Quantity 20pcs
Price Negotiate
Payment Terms T/T, Western Union, Paypal
Supply Ability 9500pcs
Delivery Time 1 day
Packaging Details Please contact me for details
Description Converter Offline Flyback Topology 8-SOIC
Icc + Iz 30 mA
Output Totem Pole Peak Current (2 µs) ±700 mA
Analog Inputs & Outputs -0.3 to 7 V
Zero Current Detector 50 (source) -10 (sink) mA
Junction Temperature Operating -40 to 150 °C
Storage Temperature -55 to 150 °C
Detailed Product Description

 

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

SymbolPinParameterValueUnit
IVcc8ICC + IZ30mA
IGD7Output Totem Pole Peak Current (2 µs)±700mA
INV, COMP, VFF, CS1, 2, 3 4Analog Inputs & Outputs-0.3 to 7V
IZCD5Zero Current Detector50 (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

 

 

 

 

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Product Tags: electronics ic chip   integrated circuit components  
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