LNK3694P Equivalent & Substitute Parts

Part Overview

The LNK3694P is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch™-XT2 series. This integrated circuit is designed for isolated flyback topology power supply applications operating at 66kHz switching frequency with 6W output power capability. The device features internal power switching, comprehensive fault protection including current limiting and over-temperature/over-voltage protection, and operates across an industrial temperature range of -40°C to 150°C.

The LNK3694P is classified as Active product status with full RoHS compliance. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit designs, particularly when inventory availability or application-specific power requirements necessitate alternative part selection.

Substiute Parts

LNK3694P

Power IntegrationsIn Stock: 935LNK3694P Datasheet

Current PartRFQ

LNK3696P

Power IntegrationsIn Stock: 6265LNK3696P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LNK3694P are identified based on strict electrical and mechanical parameter equivalence within the LinkSwitch™-XT2 product family. The substitution logic is based on the following criteria:

Mandatory Matching Parameters:

• Topology: Flyback
• Voltage - Breakdown: 900V
• Frequency - Switching: 66kHz
• Duty Cycle: 65%
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Package / Case: 8-DIP (0.300", 7.62mm), 7 Leads
• Mounting Type: Through Hole
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Fault Protection: Current Limiting, Over Temperature, Over Voltage

Variable Parameter Allowing Substitution:

• Power (Watts): The LNK3694P operates at 6W, while substitute parts may operate at higher power ratings (11W) within the same package and electrical specifications. Higher power-rated devices can substitute for lower power applications when all other parameters match.

The LNK3696P meets all mandatory matching criteria and is therefore classified as a parametric equivalent with increased power handling capability.

Parameter Comparison

Engineering Selection Recommendations

LNK3696P as Substitute for LNK3694P:

The LNK3696P is a direct parametric equivalent of the LNK3694P with identical electrical specifications across all critical parameters: topology, voltage rating, switching frequency, duty cycle, isolation characteristics, fault protection features, and thermal operating range. Both devices share identical package specifications (8-DIP through-hole), RoHS compliance status, and export classification codes.

The primary distinction is power rating: the LNK3696P is rated for 11W output power compared to the LNK3694P's 6W rating. This higher power capability does not preclude substitution in 6W applications. Both devices maintain Active product status from Power Integrations, ensuring continued manufacturing support and supply chain availability.

Selection between these parts should be based on application power requirements and inventory availability. The LNK3696P offers increased design margin for applications operating near the 6W threshold and provides access to higher inventory levels (6200 units versus 828 units for the LNK3694P).

Frequently Asked Questions (FAQ)

Q: Can the LNK3696P replace the LNK3694P in existing designs?

A: Yes. The LNK3696P is a parametric equivalent with identical electrical and mechanical specifications. The higher power rating (11W versus 6W) does not create incompatibility in 6W applications. Pin configuration, package dimensions, and electrical characteristics remain identical.

Q: What is the difference between the LNK3694P and LNK3696P?

A: The devices differ only in maximum power output rating. The LNK3694P is rated for 6W, while the LNK3696P is rated for 11W. All other specifications—topology, voltage breakdown, switching frequency, duty cycle, isolation, protection features, package type, and operating temperature range—are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the LNK3694P and LNK3696P carry RoHS Compliant status and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What is the package compatibility between these parts?

A: Both parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging with 7 leads. PCB layouts and assembly processes require no modification for substitution.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on application power requirements. The LNK3696P offers higher power capability and greater inventory availability. The LNK3694P is appropriate for applications with confirmed 6W power requirements and existing supply chain commitments.

Q: Do these parts require different thermal management?

A: Both parts operate across the identical temperature range (-40°C to 150°C junction temperature). Thermal management requirements depend on application-specific power dissipation and PCB design. The higher power rating of the LNK3696P does not mandate increased thermal management in 6W applications.

Q: Are there any lead-time differences between these parts?

A: The LNK3696P maintains higher inventory levels (6200 units) compared to the LNK3694P (828 units), potentially offering improved lead-time availability. Consult current distributor inventory for specific lead-time information.