LNK302G Equivalent & Substitute Parts

Part Overview

The LNK302G is an offline switch IC from Power Integrations' LinkSwitch®-TN series, designed for non-isolated power conversion applications utilizing Buck, Buck-Boost, and Flyback topologies. This component integrates an internal switch with comprehensive fault protection including current limiting, open loop control, over-temperature, and short-circuit protection.

The LNK302G carries an Obsolete product status. Identifying suitable substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this part.

Substiute Parts

LNK302G

Power IntegrationsIn Stock: 2184LNK302G Datasheet

Current PartRFQ

LNK302GN-TL

Power IntegrationsIn Stock: 17316LNK302GN-TL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LNK302G is determined by strict equivalence across the following critical parameters:

Topology & Functional Requirements: The substitute must support identical converter topologies (Buck, Buck-Boost, Flyback) and maintain non-isolated output configuration.

Electrical Specifications: Breakdown voltage (700V), switching frequency (66kHz), and duty cycle (69%) must remain constant to ensure circuit performance without redesign.

Protection & Control Features: Fault protection mechanisms (current limiting, open loop, over-temperature, short-circuit) must be present and functionally equivalent.

Package & Mounting: The substitute must utilize the same 8-SMD (7 Leads) Gull Wing package in SMD-8B configuration to ensure PCB compatibility without layout modifications.

Operating Temperature Range: The -40°C ~ 150°C (TJ) operating range must be maintained.

Manufacturer & Series: The substitute must originate from Power Integrations and belong to the LinkSwitch®-TN series to guarantee design compatibility and performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

LNK302GN-TL is the direct substitute for LNK302G based on complete electrical and mechanical parameter equivalence. All critical specifications including topology, voltage rating, switching frequency, duty cycle, fault protection, operating temperature range, and package configuration are identical.

The LNK302GN-TL offers additional advantages:

Product Status: The substitute maintains Active product status, ensuring long-term availability and manufacturer support, whereas the LNK302G is Obsolete.

Regulatory Compliance: The LNK302GN-TL is RoHS Compliant, meeting current environmental and regulatory requirements. The original LNK302G is RoHS non-compliant.

Supply Chain: The LNK302GN-TL demonstrates significantly higher inventory availability (17,300 units) compared to the LNK302G (2,100 units), supporting production continuity.

Packaging Flexibility: The LNK302GN-TL is available in Cut Tape (CT) and Digi-Reel® packaging options, providing supply chain flexibility.

No circuit redesign, PCB layout modification, or firmware changes are required when transitioning from LNK302G to LNK302GN-TL.

Frequently Asked Questions (FAQ)

Q: Can LNK302GN-TL be used as a direct replacement for LNK302G without circuit modifications?

A: Yes. All electrical specifications, switching characteristics, fault protection features, operating temperature range, and package configuration are identical. Direct substitution is possible without circuit redesign or PCB layout changes.

Q: What is the difference between LNK302G and LNK302GN-TL?

A: The primary differences are product status (Obsolete vs. Active), RoHS compliance status (non-compliant vs. compliant), packaging options (standard vs. Cut Tape/Digi-Reel), and inventory availability. All functional and electrical parameters are equivalent.

Q: Why is the LNK302G marked as Obsolete?

A: The LNK302G has reached end-of-life status. Power Integrations has transitioned to the LNK302GN-TL variant, which maintains identical functionality while offering improved compliance and supply chain support.

Q: Are there any compatibility concerns with the 8-SMD (7 Leads) Gull Wing package?

A: No. Both parts use the identical SMD-8B package configuration. PCB footprints, solder pad layouts, and mounting procedures are fully compatible.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical electrical characteristics and performance in circuit applications.

Q: What packaging options are available for LNK302GN-TL?

A: LNK302GN-TL is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for different procurement and assembly workflows.

Q: Is the operating temperature range identical between both parts?

A: Yes. Both LNK302G and LNK302GN-TL operate across the identical temperature range of -40°C ~ 150°C (TJ).

Q: Can existing designs using LNK302G be updated to LNK302GN-TL without qualification testing?

A: From an electrical and mechanical standpoint, parameter equivalence is complete. Design qualification decisions depend on individual company quality and compliance procedures.