LNK564DN Equivalent & Substitute Parts

Part Overview

The LNK564DN is an offline switch flyback converter IC manufactured by Power Integrations, designed for isolated power supply applications. This device integrates a 700V breakdown voltage switch with comprehensive fault protection in an 8-SOIC package, operating at 100kHz switching frequency with 3W power capability.

The LNK564DN has been discontinued at DiGi Electronics. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical and mechanical compatibility across critical parameters including voltage rating, switching topology, package configuration, and thermal specifications.

Substiute Parts

LNK564DN

Power IntegrationsIn Stock: 195672LNK564DN Datasheet

Current PartRFQ

LNK564DN-TL

Power IntegrationsIn Stock: 1504LNK564DN-TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LNK564DN is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Topology: Flyback converter architecture
• Voltage Rating: 700V breakdown voltage
• Switching Frequency: 100kHz operation
• Power Rating: 3W capability
• Duty Cycle: 70% maximum
• Output Isolation: Isolated configuration
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Short Circuit protection suite
• Operating Temperature Range: -40°C to 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 Compliance: Required
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The LNK564DN-TL qualifies as a direct substitute based on complete alignment with all electrical, mechanical, and compliance parameters. The primary distinction is packaging format (Tape & Reel versus bulk) and product status (Active versus Discontinued).

Parameter Comparison

Engineering Selection Recommendations

LNK564DN-TL as Direct Substitute:

The LNK564DN-TL is a direct electrical and mechanical equivalent to the LNK564DN. All critical parameters—voltage rating, switching frequency, power capability, topology, package configuration, and thermal specifications—are identical. Both devices are RoHS compliant and carry MSL 1 rating.

The LNK564DN-TL is currently active in production with confirmed inventory availability (1484 Pcs), whereas the LNK564DN is discontinued. For new designs, repair operations, and production continuity, the LNK564DN-TL is the appropriate selection.

The only distinction between these parts is packaging format: the LNK564DN-TL is supplied in Tape & Reel (TR) configuration, which is standard for automated assembly operations. If bulk packaging is required, component distributors may offer reeling services or alternative packaging options for the LNK564DN-TL.

Both parts share the same base product number (LNK564) and are manufactured by Power Integrations within the LinkSwitch®-LP series, ensuring design compatibility and performance equivalence.

Frequently Asked Questions (FAQ)

Q: Can the LNK564DN-TL be used as a direct replacement for the LNK564DN in existing designs?

A: Yes. The LNK564DN-TL is electrically and mechanically identical to the LNK564DN. All electrical parameters, package dimensions, pin configuration, and thermal specifications are equivalent. The device can be substituted without circuit modification.

Q: What is the difference between LNK564DN and LNK564DN-TL?

A: The primary difference is packaging format. The LNK564DN is supplied in bulk packaging, while the LNK564DN-TL is supplied in Tape & Reel (TR) format. The actual semiconductor die and electrical performance are identical. The LNK564DN-TL is currently in active production, whereas the LNK564DN is discontinued.

Q: Are both parts RoHS compliant?

A: Yes. Both the LNK564DN and LNK564DN-TL are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature range for these devices?

A: Both devices operate across -40°C to 150°C junction temperature (TJ), suitable for industrial and consumer applications across extended temperature ranges.

Q: Can the LNK564DN-TL be used in automated pick-and-place assembly?

A: Yes. The LNK564DN-TL is supplied in Tape & Reel format, which is standard for automated surface mount assembly operations. The 8-SOIC package with 0.154" (3.90mm) width is compatible with standard SMT equipment.

Q: What fault protection features are included in the LNK564DN-TL?

A: The LNK564DN-TL includes Current Limiting, Open Loop, Over Temperature, and Short Circuit protection. These features are identical to the LNK564DN.

Q: Is the LNK564DN-TL available in stock?

A: Yes. The LNK564DN-TL has confirmed inventory of 1484 Pcs New Original In Stock, providing immediate availability for production and repair applications.

Q: What is the switching frequency of the LNK564DN-TL?

A: The switching frequency is 100kHz, identical to the LNK564DN. This frequency is fixed and integral to the LinkSwitch®-LP series design.

Q: Can the LNK564DN-TL handle 3W power output?

A: Yes. The LNK564DN-TL is rated for 3W power capability with 70% maximum duty cycle, matching the LNK564DN specifications.

Q: What is the breakdown voltage rating?

A: Both devices feature a 700V breakdown voltage rating, suitable for offline flyback converter applications operating from universal AC input voltage.