LNK302DN Equivalent & Substitute Parts

Part Overview

The LNK302DN is an offline switch IC manufactured by Power Integrations, designed for non-isolated power conversion applications. This device operates as a multi-topology converter supporting Buck, Buck-Boost, and Flyback configurations at a switching frequency of 66kHz. The LNK302DN is part of the LinkSwitch®-TN series and features integrated current limiting, open loop control, over-temperature protection, and short-circuit fault protection.

The LNK302DN has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

LNK302DN

Power IntegrationsIn Stock: 23469LNK302DN Datasheet

Current PartRFQ

LNK302DN-TL

Power IntegrationsIn Stock: 30485LNK302DN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNK302DN is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Voltage breakdown rating: 700V
• Switching frequency: 66kHz
• Duty cycle: 69%
• Topology support: Buck, Buck-Boost, Flyback
• Fault protection features: Current Limiting, Open Loop, Over Temperature, Short Circuit
• Operating temperature range: -40°C ~ 150°C (TJ)

Mechanical Equivalence Criteria:

• Package type: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Supplier device package: SO-8C
• Mounting type: Surface Mount

Compliance Equivalence Criteria:

• RoHS Compliant status
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part LNK302DN-TL meets all electrical, mechanical, and compliance requirements for direct substitution. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The LNK302DN-TL is the direct substitute for the discontinued LNK302DN. Both parts are manufactured by Power Integrations and share identical electrical specifications, thermal characteristics, and mechanical packaging.

Selection Basis:

The LNK302DN-TL is recommended for new designs and component replacement due to its active product status. The part maintains full electrical and mechanical compatibility with the original LNK302DN, ensuring seamless integration into existing circuit designs without modification.

Both parts carry RoHS Compliant certification and REACH Unaffected status, meeting current environmental and regulatory requirements. The Moisture Sensitivity Level of 1 (Unlimited) indicates no special moisture handling requirements during storage or assembly.

The LNK302DN-TL is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the LNK302DN-TL be used as a direct replacement for the LNK302DN?

A: Yes. The LNK302DN-TL is electrically and mechanically identical to the LNK302DN. All electrical parameters, including breakdown voltage (700V), switching frequency (66kHz), duty cycle (69%), topology support, and fault protection features are equivalent. The physical package (8-SOIC, SO-8C) and pin configuration are identical, enabling direct substitution without circuit modification.

Q: What is the difference between LNK302DN and LNK302DN-TL?

A: The primary differences are product status and packaging format. The LNK302DN is discontinued at DiGi Electronics, while the LNK302DN-TL maintains active product status. The LNK302DN-TL is supplied in Cut Tape (CT) and Digi-Reel® packaging, whereas the LNK302DN uses standard packaging. Electrical and mechanical specifications are identical.

Q: Are there any thermal or operating condition differences between these parts?

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

Q: What compliance certifications apply to both parts?

A: Both the LNK302DN and LNK302DN-TL are RoHS Compliant and REACH Unaffected. Both carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during handling or storage.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The identical 8-SOIC package with 7 leads and SO-8C supplier device package designation ensures pin-for-pin compatibility. No PCB layout modifications are required.

Q: Which part should be selected for new production designs?

A: The LNK302DN-TL should be selected for new designs due to its active product status and higher inventory availability (30,400 Pcs vs. 23,442 Pcs). This ensures long-term component supply continuity.