LNK364DN Equivalent & Substitute Parts

Part Overview

The LNK364DN is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch®-XT series. This device integrates a high-voltage power switch with control circuitry for isolated flyback topology power supplies, rated at 9W output power with 132kHz switching frequency. The LNK364DN is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. The substitute part LNK364DN-TL maintains identical electrical and mechanical specifications while offering active product status and standard packaging options.

Substiute Parts

LNK364DN

Power IntegrationsIn Stock: 70508LNK364DN Datasheet

Current PartRFQ

LNK364DN-TL

Power IntegrationsIn Stock: 61412LNK364DN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LNK364DN is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Voltage breakdown rating (700V), power output capacity (9W), switching frequency (132kHz), duty cycle (60%), and fault protection features (current limiting, open loop, over temperature, short circuit protection) must be identical.

Mechanical Compatibility: Package type (8-SOIC with 0.154" width, 7 leads), supplier device package designation (SO-8C), and surface mount mounting type must match exactly to ensure PCB layout compatibility without redesign.

Functional Architecture: Isolated flyback topology with integrated internal switch and LinkSwitch®-XT series classification must be maintained.

Compliance & Environmental: RoHS compliance, REACH status, and moisture sensitivity level (MSL 1) must be equivalent or superior.

The LNK364DN-TL qualifies as a direct substitute based on complete parameter equivalence across all electrical, mechanical, and compliance criteria. The primary distinction is product status and packaging format availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: LNK364DN-TL is the direct functional equivalent for the discontinued LNK364DN. This substitute maintains complete electrical and mechanical compatibility, enabling direct replacement in existing designs without circuit modification or PCB redesign.

Product Status Advantage: The LNK364DN-TL carries active product status, ensuring long-term availability, ongoing manufacturer support, and compliance with current supply chain requirements. The original LNK364DN discontinuation status at DiGi Electronics makes the LNK364DN-TL the appropriate selection for new production builds and design continuity.

Compliance Certification: Both parts maintain identical RoHS compliance and REACH status, with MSL 1 rating indicating unlimited shelf life under standard storage conditions. No additional qualification or testing is required for substitution based on compliance criteria.

Packaging Flexibility: The LNK364DN-TL is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing supply chain flexibility for both prototype and high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can LNK364DN-TL be used as a direct replacement for LNK364DN in existing designs?

A: Yes. The LNK364DN-TL is electrically and mechanically identical to the LNK364DN across all specified parameters. No circuit redesign, PCB layout modification, or firmware changes are required. Direct component substitution is valid.

Q: What is the primary reason for substituting LNK364DN with LNK364DN-TL?

A: The LNK364DN is discontinued at DiGi Electronics. The LNK364DN-TL maintains identical specifications while offering active product status and standard packaging availability, ensuring supply continuity and long-term design support.

Q: Are the package dimensions and pin configurations identical?

A: Yes. Both parts use the 8-SOIC package with 0.154" width and 7 leads (SO-8C supplier designation). Pin-to-pin compatibility is complete, allowing direct PCB footprint reuse without modification.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both LNK364DN and LNK364DN-TL are RoHS compliant, REACH unaffected, and carry MSL 1 rating. Compliance certifications are equivalent.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is valid when the following parameters match: 700V breakdown voltage, 9W power output, 132kHz switching frequency, 60% duty cycle, isolated flyback topology, and identical fault protection features (current limiting, open loop, over temperature, short circuit). All parameters are identical between LNK364DN and LNK364DN-TL.

Q: Is there any difference in thermal performance or operating temperature range?

A: No. Both parts operate across the identical temperature range of -40°C to 150°C (junction temperature). Thermal characteristics and derating curves are equivalent.

Q: What packaging options are available for the substitute part?

A: The LNK364DN-TL is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.