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LNK6406D - LinkSwitch-3 AC-DC Offline Switcher IC

The LNK6406D from Power Integrations is a highly integrated AC-DC offline switcher IC from the LinkSwitch-3 family, designed for cost-effective, space-saving power supply solutions up to 6.1W. This single-chip solution combines a 725V power MOSFET, oscillator, control logic, and comprehensive protection features in a compact SO-8C surface mount package.

Key Features & Benefits

  • Integrated 725V MOSFET – Reduces component count and board space
  • 6.1W maximum output power – Ideal for low-power auxiliary supplies, standby converters, and smart home devices
  • Flyback topology – Proven, cost-effective design for isolated power conversion
  • Up to 85kHz switching frequency – Enables use of smaller transformers and output capacitors
  • Comprehensive fault protection – Current limiting, open loop, over-temperature, and short circuit protection ensure reliable operation
  • Wide operating temperature range – -40°C to 150°C (TJ) for demanding industrial and automotive applications
  • Surface mount SO-8C package – Automated assembly compatible, RoHS compliant

Typical Applications

  • Auxiliary power supplies for industrial equipment
  • Standby power for consumer electronics
  • Smart home and IoT device power
  • LED lighting drivers
  • White goods and appliances
  • Telecom and networking equipment

Why Choose Authorized Distribution?

When you purchase the LNK6406D from our authorized distributor network, you receive:

  • 100% genuine Power Integrations components with full manufacturer traceability
  • Complete technical documentation including datasheets, application notes, and reference designs
  • Long lifecycle availability to support your product programs and mitigate obsolescence risk
  • Design-in support from Power Integrations and our technical team
  • Global shipping through authorized channels with proper handling and storage

Download LinkSwitch-3 Family Datasheet →


Product attributes Property Value
Manufacturer Power Integrations
Product Series LinkSwitch™-3
Packaging |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 725V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 55%
Frequency - Switching Up to 85kHz
Power (Watts) 6.1 W
Fault Protection Current Limiting, Open Loop, Over Temperature, Short Circuit
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width), 7 Leads
Supplier Device Package SO-8C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY