LNK6768K-TL Equivalent & Substitute Parts

Part Overview

The LNK6768K-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch™-HP series. This isolated power management IC operates at 120kHz to 136kHz switching frequency with 68W power output capability and 650V breakdown voltage rating. The device is designed for offline flyback topology applications requiring integrated current limiting, overload, over-temperature, over-voltage, and short-circuit protection. Product status is Active with RoHS compliance and REACH unaffected designation. Substitute parts are identified when design requirements permit operation at alternative power output levels while maintaining electrical and mechanical compatibility within the LinkSwitch™-HP series.

Substiute Parts

LNK6768K-TL

Power IntegrationsIn Stock: 1753LNK6768K-TL Datasheet

Current PartRFQ

LNK6663K-TL

Power IntegrationsIn Stock: 1966LNK6663K-TL Datasheet

Parametric EquivalentRFQ

LNK6667K-TL

Power IntegrationsIn Stock: 6121LNK6667K-TL Datasheet

Parametric EquivalentRFQ

LNK6763K-TL

Power IntegrationsIn Stock: 2926LNK6763K-TL Datasheet

Parametric EquivalentRFQ

LNK6765K-TL

Power IntegrationsIn Stock: 1887LNK6765K-TL Datasheet

Parametric EquivalentRFQ

LNK6767K-TL

Power IntegrationsIn Stock: 9715LNK6767K-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts within the LinkSwitch™-HP series are qualified for the LNK6768K-TL based on the following criteria:

Mandatory Matching Parameters:

• Manufacturer: Power Integrations
• Series: LinkSwitch™-HP
• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 650V
• Frequency - Switching: 120kHz ~ 136kHz
• Duty Cycle: 64%
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
• Operating Temperature: -40°C ~ 150°C (TJ)
• Package / Case: 12-BESOP (0.350", 8.89mm Width), 11 Leads, Exposed Pad
• Mounting Type: Surface Mount
• RoHS Status: RoHS Compliant
• MSL Rating: 3 (168 Hours)

Variable Parameter (Substitution Basis):

• Power (Watts): Varies by part number (35W, 42W, 59W, 68W)

All substitute parts maintain identical electrical characteristics, protection features, thermal operating range, and physical packaging. Substitution is valid when application power requirements permit operation at the alternative wattage rating of the substitute device.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status with identical RoHS compliance and REACH unaffected designation. Selection between LNK6768K-TL and substitute devices is determined by application power output requirements:

LNK6768K-TL (68W): Primary selection for maximum power output applications within the LinkSwitch™-HP series.

LNK6767K-TL (59W): Substitute for 59W applications; available in Cut Tape (CT) & Digi-Reel® packaging with highest inventory (9700 pcs).

LNK6667K-TL (59W): Substitute for 59W applications; available in Tape & Reel (TR) packaging with high inventory (6098 pcs).

LNK6765K-TL (42W): Substitute for 42W applications; Tape & Reel (TR) packaging.

LNK6763K-TL (35W): Substitute for 35W applications; Tape & Reel (TR) packaging.

LNK6663K-TL (35W): Substitute for 35W applications; Tape & Reel (TR) packaging with inventory of 1868 pcs.

All devices share identical electrical protection features, thermal operating range (-40°C to 150°C), and 12-BESOP package footprint. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LNK6767K-TL replace LNK6768K-TL in all applications?

A: LNK6767K-TL is a substitute only when application power requirements are 59W or lower. The 68W-rated LNK6768K-TL is required for applications demanding the full 68W output capability. Both devices share identical electrical characteristics, protection features, and package specifications.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Packaging format affects supply chain logistics and handling but does not alter electrical performance or physical footprint. Both packaging types use the 12-BESOP case with identical lead configuration and exposed pad design. Selection is based on procurement and assembly process requirements.

Q: Are all substitute parts pin-compatible with LNK6768K-TL?

A: Yes. All substitute parts use the 12-BESOP package with 11 leads and exposed pad in identical configuration. PCB footprint and pin assignment are identical across all listed devices.

Q: Do substitute parts maintain the same fault protection features?

A: Yes. All substitute parts include identical fault protection: current limiting, overload, over-temperature, over-voltage, and short-circuit protection. Operating temperature range (-40°C to 150°C) and duty cycle (64%) are identical.

Q: What is the MSL (Moisture Sensitivity Level) rating for all parts?

A: All parts carry MSL rating 3 with 168-hour floor life. Storage and handling requirements are identical across all substitute devices.

Q: Can lower-wattage parts be used in place of the 68W LNK6768K-TL?

A: Lower-wattage substitutes (59W, 42W, 35W) are valid only when application design permits operation at the reduced power rating. The 68W LNK6768K-TL must be used for applications requiring full 68W output capability.

Q: Are all parts RoHS compliant?

A: Yes. All listed parts are RoHS compliant with REACH unaffected status, meeting environmental and regulatory requirements for industrial and consumer applications.