LNK407LG Equivalent & Substitute Parts

Part Overview

The LNK407LG is an AC DC offline switcher LED driver IC manufactured by Power Integrations, operating in the LinkSwitch®-PH series. This device integrates an internal switch and operates as a flyback topology converter with triac dimming capability, designed for lighting applications. The part is currently active in production status with 996 pieces in stock inventory. Alternative equivalent parts are necessary when addressing supply chain constraints, specific packaging requirements, or thermal operating range specifications for particular application environments.

Substiute Parts

LNK407LG

Power IntegrationsIn Stock: 1057LNK407LG Datasheet

Current PartRFQ

AL6562AS-13

Diodes IncorporatedIn Stock: 63141AL6562AS-13 Datasheet

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LT3799EMSE#PBF

Analog Devices Inc.In Stock: 1960LT3799EMSE#PBF Datasheet

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LT3799IMSE-1#PBF

Analog Devices Inc.In Stock: 1127LT3799IMSE-1#PBF Datasheet

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MP4031GS-Z

Monolithic Power SystemsIn Stock: 20248MP4031GS-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNK407LG is determined by the following critical parameters:

Primary Substitution Criteria:

• Device type: AC DC offline switcher for lighting applications
• Topology: Flyback converter architecture
• Dimming capability: Triac dimming support
• Number of outputs: Single output configuration
• Internal switch integration: Presence or absence of integrated switching element
• Operating temperature range: Minimum -40°C junction temperature
• Regulatory compliance: RoHS and REACH status

Secondary Considerations:

• Supply voltage range compatibility
• Output current capability
• Package form factor and mounting type
• Frequency of operation
• Inventory availability and production status

The substitute parts listed below share the core functional characteristics of AC DC offline switching with triac dimming for LED driver applications. However, variations exist in supply voltage ranges, package types, and thermal specifications that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

LT3799EMSE#PBF and LT3799IMSE-1#PBF (Analog Devices Inc.)

These parts share identical electrical and package specifications. Both are ROHS3 compliant and REACH unaffected. The LT3799 series operates as AC DC offline switcher flyback converters with triac dimming support. The primary distinction from the LNK407LG is the surface mount 16-MSOP-EP package versus through-hole 7-SSIP mounting. Operating temperature range is limited to -40°C ~ 125°C (TJ), which is 25°C lower than the LNK407LG maximum. Frequency range of 25kHz ~ 300kHz provides broader operational flexibility compared to the fixed 66kHz of the LNK407LG. These parts are suitable for applications where surface mount assembly is preferred and thermal requirements do not exceed 125°C junction temperature.

MP4031GS-Z (Monolithic Power Systems)

This part operates as an AC DC offline switcher with flyback topology and supports both analog and TRIAC dimming modes. The 8-SOIC surface mount package differs from the LNK407LG through-hole configuration. Supply voltage range of 11V ~ 27V is significantly narrower than the LNK407LG range of 36V ~ 725V, limiting applicability to lower voltage input designs. Operating temperature maximum of -40°C ~ 125°C (TJ) is 25°C below the LNK407LG specification. Inventory availability is substantial at 20,200 pieces. This part is applicable only to designs with restricted input voltage requirements below 36V.

AL6562AS-13 (Diodes Incorporated)

This part operates as an AC DC offline switcher but employs step-up (boost) topology rather than flyback, representing a fundamental architectural difference from the LNK407LG. The 8-SOIC surface mount package and supply voltage range of 10.3V ~ 22V indicate this device is designed for lower voltage input applications. Operating temperature range matches the LNK407LG at -40°C ~ 150°C (TJ). The boost topology and lower voltage specifications make this part unsuitable as a direct functional equivalent to the LNK407LG for standard offline LED driver applications requiring high input voltage capability.

Compliance and Production Status

All substitute parts maintain active production status and comply with RoHS3 and REACH requirements. Moisture sensitivity level is MSL 1 (unlimited) for all parts except MP4031GS-Z, which specifies MSL 2 (1 year). All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Frequently Asked Questions (FAQ)

Q: Can the LT3799EMSE#PBF directly replace the LNK407LG in an existing PCB design?

A: Direct PCB replacement is not possible due to package incompatibility. The LNK407LG uses through-hole 7-SSIP mounting with formed leads, while the LT3799EMSE#PBF requires surface mount 16-MSOP-EP assembly. PCB redesign is necessary. Additionally, the LT3799EMSE#PBF maximum operating temperature is 125°C (TJ) versus 150°C (TJ) for the LNK407LG, which may affect thermal margin in high-temperature applications.

Q: What is the primary functional difference between the MP4031GS-Z and LNK407LG?

A: Both devices are AC DC offline switcher LED drivers with triac dimming capability and flyback topology. The critical difference is supply voltage range: the LNK407LG operates from 36V to 725V, while the MP4031GS-Z operates from 11V to 27V. The MP4031GS-Z is designed for lower voltage input applications and cannot be used in designs requiring the full 36V ~ 725V input range of the LNK407LG.

Q: Why is the AL6562AS-13 listed as a substitute if it uses boost topology instead of flyback?

A: The AL6562AS-13 is listed based on the provided input parameters as a substitute part. However, the fundamental topology difference (step-up boost versus flyback) represents a significant architectural distinction. The boost topology and lower supply voltage range (10.3V ~ 22V) make this part unsuitable for applications requiring the LNK407LG's high-voltage input capability and flyback architecture. This part should not be selected as a functional equivalent without comprehensive circuit redesign.

Q: Are the LT3799EMSE#PBF and LT3799IMSE-1#PBF interchangeable?

A: Yes. Both parts share identical electrical specifications, package type (16-MSOP-EP), and operating parameters. The difference in part number suffix indicates different temperature grade or manufacturing lot designations from Analog Devices Inc., but the functional and electrical characteristics are equivalent.

Q: What are the thermal considerations when substituting the LNK407LG?

A: The LNK407LG operates to 150°C (TJ). The LT3799 series and MP4031GS-Z are limited to 125°C (TJ), representing a 25°C reduction in maximum junction temperature. Applications operating near thermal limits may experience reduced performance margin or require additional thermal management modifications. The AL6562AS-13 matches the 150°C (TJ) specification of the LNK407LG.

Q: What packaging considerations apply to substitution?

A: The LNK407LG uses through-hole 7-SSIP mounting with formed leads, suitable for wave soldering and through-hole assembly processes. All substitute parts use surface mount packages (16-MSOP-EP or 8-SOIC), requiring reflow soldering and PCB redesign. Through-hole to surface mount conversion involves significant assembly process changes and PCB layout modifications.

Q: Which substitute part has the highest inventory availability?

A: The AL6562AS-13 has the highest inventory at 63,080 pieces. The MP4031GS-Z follows with 20,200 pieces. However, inventory availability should not override functional compatibility requirements. The AL6562AS-13 boost topology and MP4031GS-Z limited voltage range make these parts unsuitable for many LNK407LG applications despite high stock levels.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory compliance status of the LNK407LG. All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.