LNK6436D Equivalent & Substitute Parts

Part Overview

The LNK6436D is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch™-3 series. This device integrates a high-voltage power switch with control circuitry for isolated flyback topology applications, delivering up to 6.1 W output power. The LNK6436D is discontinued at DiGi Electronics, necessitating identification of functionally equivalent substitute components for ongoing design support and procurement.

Substiute Parts

LNK6436D

Power IntegrationsIn Stock: 898LNK6436D Datasheet

Current PartRFQ

LNK6417D

Power IntegrationsIn Stock: 8605LNK6417D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNK6436D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 725V rating
• Frequency - Switching: Up to 85kHz operation
• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Short Circuit
• Series: LinkSwitch™-3

Allowable Variation:

• Power (Watts): The substitute part may exceed the original specification, provided all other parameters remain equivalent. The LNK6436D operates at 6.1 W; substitute parts with higher power ratings remain functionally compatible in applications designed for the original device.

The LNK6417D meets all mandatory matching parameters and represents a direct parametric equivalent with increased power capability (7.5 W versus 6.1 W).

Parameter Comparison

Engineering Selection Recommendations

The LNK6417D is a direct parametric substitute for the LNK6436D. Both devices are RoHS Compliant and REACH Unaffected, meeting equivalent regulatory and environmental standards. The LNK6417D provides higher power output (7.5 W versus 6.1 W) while maintaining identical electrical characteristics, package configuration, and thermal operating range.

Selection between these parts should be based on application power requirements and component availability. The LNK6417D is currently available in higher inventory quantities (8563 Pcs) compared to the LNK6436D (838 Pcs), making it the preferred choice for new procurement and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the LNK6417D replace the LNK6436D in existing designs?

A: Yes. The LNK6417D is a parametric equivalent with identical topology, voltage rating, switching frequency, package, and thermal specifications. The increased power rating (7.5 W versus 6.1 W) does not create compatibility issues in applications originally designed for the LNK6436D.

Q: Are there package differences between LNK6436D and LNK6417D?

A: No. Both devices use the 8-SOIC (0.154", 3.90mm Width), 7 Leads package with surface mount configuration. PCB layout and footprint compatibility are identical.

Q: What is the significance of the power rating difference?

A: The LNK6417D operates at 7.5 W output power versus 6.1 W for the LNK6436D. This represents increased power delivery capability within the same package and electrical framework. Applications designed for 6.1 W operation remain fully compatible with the higher-rated substitute.

Q: Do both parts share the same fault protection features?

A: Yes. Both the LNK6436D and LNK6417D include identical fault protection: Current Limiting, Open Loop, Over Temperature, and Short Circuit protection.

Q: Are there compliance or certification differences?

A: No. Both parts are RoHS Compliant, REACH Unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001).

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

A: Both the LNK6436D and LNK6417D operate across -40°C to 150°C junction temperature (TJ), providing identical thermal performance specifications.