L6565D
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STMicroelectronics L6565D

Manufacturer No:
L6565D
Manufacturer:
STMicroelectronics
Package:
Tube
Description:
IC OFFLINE SWITCH FLYBACK 8SO
Delivery:
Payment:
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Product Introduction

Overview

The L6565D, produced by STMicroelectronics, is a current-mode primary controller IC designed for building offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters. This IC is optimized for high efficiency and compliance with various energy standards such as Blue Angel, Energy Star, and Energy 2000. The quasi-resonant operation is achieved through a transformer demagnetization sensing input that triggers the MOSFET's turn-on, ensuring efficient switching. The device also features line voltage feedforward to maintain constant power delivery despite changes in mains voltage and a frequency foldback mechanism to optimize standby efficiency at light loads.

Key Specifications

Parameter Min. Typ. Max. Unit
Supply Voltage (Vcc) 10.3 - 18 V
Turn-on Threshold (VccOn) 12.5 - 14.5 V
Turn-off Threshold (VccOff) 8.7 - 10.3 V
Hysteresis 3.65 - 4.3 V
Start-up Current 45 70 - µA
Quiescent Current 2.3 3.5 - mA
Operating Temperature -40 - 150 °C
Storage Temperature -55 - 150 °C
Gate Driver Peak Current - - ±700 mA

Key Features

  • Quasi-resonant (QR) Zero-Voltage-Switching (ZVS) topology for high efficiency
  • Line feedforward to deliver constant power despite mains voltage changes
  • Frequency foldback for optimum standby efficiency at light loads
  • Ultra-low start-up current (< 70µA) and quiescent current (< 3.5mA)
  • Disable function (ON/OFF control)
  • 1% precision internal reference voltage (@ Tj = 25°C)
  • ±400mA totem pole gate driver with UVLO pull-down
  • Pulse-by-pulse and hiccup-mode overcurrent protection (OCP)
  • Compliance with Blue Angel, Energy Star, and Energy 2000 standards

Applications

  • TV/Monitor SMPS
  • AC-DC adapters/chargers
  • Digital consumer electronics
  • Printers, fax machines, photocopiers, and scanners

Q & A

  1. What is the primary function of the L6565D IC?

    The L6565D is a current-mode primary controller IC designed to build offline Quasi-resonant ZVS flyback converters.

  2. What is the significance of quasi-resonant operation in the L6565D?

    Quasi-resonant operation is achieved through a transformer demagnetization sensing input that triggers the MOSFET's turn-on, ensuring efficient switching and high efficiency.

  3. How does the L6565D handle variations in mains voltage?

    The device features line voltage feedforward to maintain constant power delivery despite changes in mains voltage.

  4. What is the purpose of the frequency foldback mechanism in the L6565D?

    The frequency foldback mechanism optimizes standby efficiency at light loads by automatically lowering the operating frequency.

  5. What are the typical start-up and quiescent currents of the L6565D?

    The start-up current is less than 70µA, and the quiescent current is less than 3.5mA.

  6. Does the L6565D have overcurrent protection?
  7. Is the L6565D compliant with any energy efficiency standards?
  8. What are the typical operating and storage temperature ranges for the L6565D?

    The operating temperature range is -40°C to 150°C, and the storage temperature range is -55°C to 150°C.

  9. What is the peak current capability of the gate driver in the L6565D?

    The gate driver has a peak current capability of ±700mA.

  10. What are some common applications of the L6565D?

Product Attributes

Output Isolation:Isolated
Internal Switch(s):No
Voltage - Breakdown:- 
Topology:Flyback
Voltage - Start Up:13.5 V
Voltage - Supply (Vcc/Vdd):10.3V ~ 18V
Duty Cycle:- 
Frequency - Switching:- 
Power (Watts):- 
Fault Protection:Current Limiting
Control Features:- 
Operating Temperature:-40°C ~ 150°C (TJ)
Package / Case:8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SOIC
Mounting Type:Surface Mount
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Similar Products

Part Number L6565D L6565N
Manufacturer STMicroelectronics STMicroelectronics
Product Status Active Active
Output Isolation Isolated Isolated
Internal Switch(s) No No
Voltage - Breakdown - -
Topology Flyback Flyback
Voltage - Start Up 13.5 V 13.5 V
Voltage - Supply (Vcc/Vdd) 10.3V ~ 18V 10.3V ~ 18V
Duty Cycle - -
Frequency - Switching - -
Power (Watts) - -
Fault Protection Current Limiting Current Limiting
Control Features - -
Operating Temperature -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ)
Package / Case 8-SOIC (0.154", 3.90mm Width) 8-DIP (0.300", 7.62mm)
Supplier Device Package 8-SOIC 8-DIP
Mounting Type Surface Mount Through Hole

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