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Product attributes Property Value
Manufacturer Power Integrations
Product Series LinkSwitch™-HP
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 650V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 64%
Frequency - Switching 120kHz ~ 136kHz
Power (Watts) 39 W
Fault Protection Current Limiting, Over Load, Over Temperature, Over Voltage, 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 LNK6664K-TL from Power Integrations is a Flyback offline switcher in the LinkSwitch™-HP series, delivering up to 39 W with a galvanically isolated output. It integrates a 650V power switch and operates at 120kHz to 136kHz with a 64% maximum duty cycle. Fault protection includes current limiting, over load, over temperature, over voltage, and short circuit. Packaged in a 12-BESOP exposed-pad format rated for -40°C to 150°C junctions.

  • Integrated 650V switch simplifies isolated flyback designs and reduces external components.
  • Up to 39 W output supports higher-power AC-DC adapter applications.
  • Broad fault protection (current limiting, over load, over temperature, over voltage, short circuit) improves reliability.
  • 120kHz to 136kHz switching frequency enables compact magnetic designs.
  • -40°C to 150°C junction range suits demanding thermal environments.

High-Density AC-DC Adapters

The LNK6664K-TL delivers up to 39 W in an isolated flyback topology, well suited for compact adapters. The integrated 650V switch and 64% max duty cycle support wide-input offline designs.

Consumer Electronics Power

With current limiting, over load, over voltage, and short circuit protection, this LinkSwitch-HP device provides robust fault handling for set-top boxes and networking gear.

Industrial Bias Supplies

The 12-BESOP exposed-pad package aids thermal performance, while the -40°C to 150°C junction range supports reliable operation in industrial systems.

Appliance Control Power

Operating at 120kHz to 136kHz, the LNK6664K-TL enables compact transformer designs for isolated supplies in white goods.

Q: What is the topology of the LNK6664K-TL?
A: Flyback, with galvanically isolated output.
Q: Does it include an internal switch?
A: Yes, the power switch is integrated.
Q: What is the breakdown voltage?
A: 650V Vds rating.
Q: What power can it deliver?
A: Up to 39 W.
Q: What switching frequency does it use?
A: 120kHz to 136kHz with 64% max duty cycle.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit protection.
Base Product Number : LNK6664K
12-BESOP 39 W 650V AC-DC Flyback Converter Isolated LinkSwitch-HP Offline Switcher Power Integrations
Q: What is the topology of the LNK6664K-TL?
A: Flyback, with galvanically isolated output.
Q: Does it include an internal switch?
A: Yes, the power switch is integrated.
Q: What is the breakdown voltage?
A: 650V Vds rating.
Q: What power can it deliver?
A: Up to 39 W.
Q: What switching frequency does it use?
A: 120kHz to 136kHz with 64% max duty cycle.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit protection.