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Product attributes Property Value
Manufacturer Power Integrations
Product Series LinkSwitch™-3
Packaging 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) 9 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 12-BESOP (0.350", 8.89mm Width), 11 Leads, Exposed Pad
Supplier Device Package 12-ESOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations LNK6427K-TL is an isolated Flyback offline switcher from the LinkSwitch-3 series in a 12-BESOP package with exposed pad. It integrates the power switch, delivers up to 9 W, and switches at up to 85kHz with a 55% maximum duty cycle. A 725V breakdown rating and fault protection make it a compact choice for low-power isolated AC-DC designs.

  • Integrated switch reduces external components.
  • 725V breakdown for robust offline operation.
  • Isolated Flyback topology for safety-critical designs.
  • Fault protection including open loop and over temperature.
  • Exposed-pad package aids thermal dissipation.

Small AC-DC Adapters

The 9 W output and isolated Flyback topology suit compact adapters requiring galvanic isolation.

Auxiliary Power Rails

Up to 85kHz switching and an integrated switch enable compact isolated bias supplies.

Consumer Appliances

A 725V breakdown and -40°C to 150°C junction range support reliable offline operation.

Smart Home Devices

Low power and integrated switch make this device a fit for small isolated power stages.

Q: What topology does the LNK6427K-TL use?
A: It is an isolated Flyback offline switcher from the LinkSwitch-3 series with an integrated switch.
Q: What is the breakdown voltage?
A: 725V Vds rating.
Q: How much power can it deliver?
A: Up to 9 W.
Q: What switching frequency does it use?
A: Up to 85kHz with 55% max duty cycle.
Q: What protections are included?
A: Current limiting, open loop, over temperature, and short circuit protection.
Base Product Number : LNK6427K
12-BESOP 725V 9W AC-DC Flyback Converter Isolated LinkSwitch-3 Offline Switcher Power Integrations
Q: What topology does the LNK6427K-TL use?
A: It is an isolated Flyback offline switcher from the LinkSwitch-3 series with an integrated switch.
Q: What is the breakdown voltage?
A: 725V Vds rating.
Q: How much power can it deliver?
A: Up to 9 W.
Q: What switching frequency does it use?
A: Up to 85kHz with 55% max duty cycle.
Q: What protections are included?
A: Current limiting, open loop, over temperature, and short circuit protection.