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LNK6428E - LinkSwitch™-3 Offline Switcher IC

The LNK6428E from Power Integrations is a high-performance integrated offline switcher IC designed for isolated flyback AC-DC power conversion applications up to 10W. Part of the proven LinkSwitch-3 family, this device integrates a 725V power MOSFET, oscillator, control logic, and comprehensive protection features in a compact eSIP-7C through-hole package.

Key Features & Benefits

  • Integrated 725V Power MOSFET - Reduces component count and board space
  • 10W Output Power - Ideal for low-power AC-DC applications including adapters, chargers, and auxiliary supplies
  • Flyback Topology - Proven, cost-effective isolated power conversion
  • Up to 85kHz Switching Frequency - Enables compact transformer design
  • Comprehensive Protection - Current limiting, open loop, over-temperature, and short circuit protection ensure reliable operation
  • 55% Maximum Duty Cycle - Optimized for wide input voltage range designs
  • Wide Operating Temperature Range - -40°C to 150°C (TJ) for industrial and automotive applications
  • RoHS Compliant - Meets environmental standards for global markets

Target Applications

  • AC-DC adapters and chargers
  • Auxiliary power supplies for industrial equipment
  • Smart home and IoT device power
  • White goods and appliance control
  • LED lighting drivers
  • Standby and bias supplies

Quality & Compliance

All LNK6428E units are sourced from authorized distributors with full traceability and come with manufacturer documentation. RoHS and REACH compliant for global regulatory requirements. Suitable for aerospace, automotive, industrial, medical, and telecom applications requiring long lifecycle support.

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) 10 W
Fault Protection Current Limiting, Open Loop, Over Temperature, Short Circuit
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Through Hole
Package / Case 7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Supplier Device Package eSIP-7C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY