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Product attributes Property Value
Manufacturer Power Integrations
Product Series LinkSwitch™-3
Packaging Cut Tape (CT) | Tape & Reel (TR)
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) 4.1 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

The LNK6404D-TL from Power Integrations is a Flyback offline switcher IC in the LinkSwitch-3 series, delivering 4.1 W of isolated output power. It features an integrated switch rated at 725V breakdown, a 55% maximum duty cycle, and switching frequency up to 85kHz. Packaged in a 7-lead 8-SOIC, it includes Current Limiting, Open Loop, Over Temperature, and Short Circuit protection across a -40°C to 150°C junction temperature range.

  • Integrated 725V switch simplifies design and reduces external component count.
  • Galvanically isolated Flyback topology for safe offline conversion.
  • Wide -40°C to 150°C junction temperature range for demanding environments.
  • Comprehensive protection including Current Limiting, Open Loop, Over Temperature, and Short Circuit.
  • Up to 85kHz switching with 55% max duty cycle for compact designs.

Low-Power Isolated Adapters

The LNK6404D-TL delivers 4.1 W in an isolated Flyback topology with an integrated 725V switch, ideal for compact low-power AC-DC adapters.

Harsh-Environment Power Supplies

With a -40°C to 150°C junction temperature range, this device suits demanding environments requiring reliable isolated bias power.

Appliance Auxiliary Supplies

Current Limiting and Open Loop protection make the LNK6404D-TL a robust choice for auxiliary power in appliances and control boards.

Metering and Sensor Power

The 7-lead 8-SOIC package and up to 85kHz switching support compact isolated supplies for metering and sensor electronics.

Q: What topology does the LNK6404D-TL use?
A: It is a Flyback offline switcher from Power Integrations' LinkSwitch-3 series.
Q: Is the output isolated?
A: Yes, it provides galvanically isolated output.
Q: Does it include an integrated switch?
A: Yes, it has an integrated switch with a 725V breakdown rating.
Q: What is the maximum duty cycle and frequency?
A: 55% maximum duty cycle with switching frequency up to 85kHz.
Q: What power does it deliver?
A: 4.1 W output power.
Q: What protections are included?
A: Current Limiting, Open Loop, Over Temperature, and Short Circuit protection.
Base Product Number : LNK6404D
4.1 W 725V 8-SOIC 85kHz AC-DC Flyback Converter Isolated LinkSwitch-3 Offline Switcher Power Integrations
Q: What topology does the LNK6404D-TL use?
A: It is a Flyback offline switcher from Power Integrations' LinkSwitch-3 series.
Q: Is the output isolated?
A: Yes, it provides galvanically isolated output.
Q: Does it include an integrated switch?
A: Yes, it has an integrated switch with a 725V breakdown rating.
Q: What is the maximum duty cycle and frequency?
A: 55% maximum duty cycle with switching frequency up to 85kHz.
Q: What power does it deliver?
A: 4.1 W output power.
Q: What protections are included?
A: Current Limiting, Open Loop, Over Temperature, and Short Circuit protection.