LNK6417D-TL Equivalent & Substitute Parts

Part Overview

The LNK6417D-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch™-3 series. This isolated power management IC operates at switching frequencies up to 85kHz and delivers 7.5W output power in a compact 8-SOIC package. The device is designed for offline flyback topology applications requiring integrated current limiting, open loop control, over-temperature protection, and short-circuit fault protection.

The LNK6417D-TL maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified based on matching electrical specifications, package compatibility, and thermal operating range to ensure direct functional equivalence in circuit design.

Substiute Parts

LNK6417D-TL

Power IntegrationsIn Stock: 15931LNK6417D-TL Datasheet

Current PartRFQ

LNK6404D-TL

Power IntegrationsIn Stock: 1825LNK6404D-TL Datasheet

Parametric EquivalentRFQ

LNK6406D-TL

Power IntegrationsIn Stock: 3192LNK6406D-TL Datasheet

Parametric EquivalentRFQ

LNK6407D-TL

Power IntegrationsIn Stock: 15740LNK6407D-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LNK6417D-TL are qualified based on the following critical parameters that determine functional equivalence:

Matching Criteria:

• Manufacturer: Power Integrations
• Series: LinkSwitch™-3
• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 725V
• Frequency - Switching: Up to 85kHz
• Duty Cycle: 55%
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Mounting Type: Surface Mount
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Short Circuit
• RoHS Status: RoHS Compliant
• MSL Rating: 1 (Unlimited)

Variable Parameter:

• Power (Watts): Differs across substitute parts (4.1W, 6.1W, 7.5W)

The LNK6417D-TL operates at 7.5W output power. Substitute parts with lower power ratings (LNK6404D-TL at 4.1W, LNK6406D-TL at 6.1W) are suitable for applications requiring reduced power delivery. The LNK6407D-TL matches the 7.5W specification of the main part.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status with full RoHS compliance and REACH unaffected certification. Selection between the LNK6417D-TL and its substitutes is determined by output power requirements:

LNK6417D-TL (7.5W): Primary selection for applications requiring 7.5W output power delivery. Inventory: 15,900 pcs.

LNK6407D-TL (7.5W): Direct functional equivalent with identical 7.5W power specification. Inventory: 15,700 pcs. Pin-compatible replacement with no circuit modifications required.

LNK6406D-TL (6.1W): Suitable for applications with reduced power requirements up to 6.1W. Inventory: 3,103 pcs. Identical package and thermal characteristics.

LNK6404D-TL (4.1W): Applicable for low-power applications requiring up to 4.1W output. Inventory: 1,782 pcs. Maintains full electrical and thermal compatibility within its power rating.

All parts share identical package geometry (8-SOIC), thermal operating range (-40°C to 150°C), and protection features, enabling direct PCB-level substitution when power requirements align.

Frequently Asked Questions (FAQ)

Q: Can LNK6404D-TL replace LNK6417D-TL in a 7.5W application?

A: No. The LNK6404D-TL is rated for 4.1W maximum output power, while the LNK6417D-TL is rated for 7.5W. Using an undersized part will result in insufficient power delivery and potential thermal stress.

Q: Are all substitute parts pin-compatible with LNK6417D-TL?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package with 7 leads, enabling direct PCB-level replacement without layout modifications.

Q: What is the primary difference between LNK6417D-TL and LNK6407D-TL?

A: Both parts deliver 7.5W output power and share identical electrical specifications, topology, and thermal characteristics. The primary difference is manufacturer part numbering within the LinkSwitch™-3 series.

Q: Can substitute parts be used in applications below their rated power?

A: Yes. Parts rated for higher power (LNK6417D-TL, LNK6407D-TL at 7.5W) can be used in applications requiring lower power output. The device will operate within its specified parameters at reduced load conditions.

Q: Are all parts RoHS compliant?

A: Yes. All listed parts maintain RoHS compliance and REACH unaffected certification status, suitable for regulated manufacturing environments.

Q: What is the significance of the 725V breakdown voltage specification?

A: The 725V breakdown voltage is a critical electrical parameter common to all substitute parts, ensuring equivalent voltage stress tolerance in offline flyback converter applications. This specification is identical across all listed parts.

Q: Do substitute parts require different PCB layout considerations?

A: No. All substitute parts use identical package dimensions and lead spacing (8-SOIC, 0.154" width, 3.90mm), requiring no PCB layout modifications for direct substitution.