LNK306DN Equivalent & Substitute Parts

Part Overview

The LNK306DN is an offline switch IC manufactured by Power Integrations, designed for non-isolated power conversion applications. This device operates as a LinkSwitch®-TN series component, supporting Buck, Buck-Boost, and Flyback topologies at a switching frequency of 66kHz. The LNK306DN is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements.

Substiute Parts

LNK306DN

Power IntegrationsIn Stock: 16098LNK306DN Datasheet

Current PartRFQ

LNK306DN-TL

Power IntegrationsIn Stock: 45333LNK306DN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNK306DN is determined by strict equivalence across the following critical parameters:

Topology & Functional Requirements: The substitute must support identical topologies (Buck, Buck-Boost, Flyback) and operate as a non-isolated offline switch.

Electrical Specifications: Voltage breakdown rating (700V), switching frequency (66kHz), duty cycle (69%), and fault protection features (Current Limiting, Open Loop, Over Temperature, Short Circuit) must match exactly.

Thermal & Operating Conditions: Operating temperature range of -40°C to 150°C (TJ) must be maintained.

Package & Mechanical Compatibility: The substitute must use the same 8-SOIC package configuration (0.154", 3.90mm Width, 7 Leads) with SO-8C supplier device package designation to ensure PCB layout compatibility.

Compliance & Regulatory: RoHS compliance and MSL rating (1 - Unlimited) must be equivalent.

The LNK306DN-TL meets all these criteria and is classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

LNK306DN-TL is the direct substitute for the discontinued LNK306DN. Both components are manufactured by Power Integrations within the LinkSwitch®-TN series and share identical electrical, thermal, and mechanical specifications.

The primary distinction between these parts is product status and packaging format. The LNK306DN is discontinued at DiGi Electronics, while the LNK306DN-TL maintains active product status with higher inventory availability (45,300 pieces versus 16,087 pieces). The LNK306DN-TL is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production-volume applications.

Both components carry equivalent compliance certifications: RoHS Compliant, REACH Unaffected, MSL 1 (Unlimited), and ECCN EAR99 classification. No design modifications, PCB layout changes, or thermal management adjustments are required when transitioning from LNK306DN to LNK306DN-TL.

Frequently Asked Questions (FAQ)

Q: Can LNK306DN-TL be used as a direct replacement for LNK306DN in existing designs?

A: Yes. The LNK306DN-TL is electrically and mechanically identical to the LNK306DN. All electrical parameters, package dimensions, pin configurations, and thermal characteristics are equivalent. No circuit modifications are necessary.

Q: What is the difference between LNK306DN and LNK306DN-TL?

A: The primary differences are product status and packaging format. The LNK306DN is discontinued, while LNK306DN-TL is active. The LNK306DN-TL is supplied in Cut Tape (CT) and Digi-Reel® formats, whereas the LNK306DN packaging format is not specified in the provided data. Both share identical electrical and mechanical specifications.

Q: Are there any PCB layout considerations when using LNK306DN-TL?

A: No. Both parts use the identical 8-SOIC package (0.154", 3.90mm Width, 7 Leads) with SO-8C supplier device package designation. Existing PCB layouts require no modification.

Q: What topologies does the LNK306DN-TL support?

A: The LNK306DN-TL supports Buck, Buck-Boost, and Flyback topologies in non-isolated configurations at a switching frequency of 66kHz.

Q: What is the maximum operating temperature for LNK306DN-TL?

A: The maximum junction temperature (TJ) is 150°C. The operating temperature range is -40°C to 150°C.

Q: Does LNK306DN-TL include fault protection?

A: Yes. The LNK306DN-TL includes Current Limiting, Open Loop, Over Temperature, and Short Circuit protection features.

Q: Is LNK306DN-TL RoHS compliant?

A: Yes. The LNK306DN-TL is RoHS Compliant with MSL rating of 1 (Unlimited moisture sensitivity level).