LNK3304D-TL Equivalent & Substitute Parts

Part Overview

The LNK3304D-TL is an offline switch IC from Power Integrations' LinkSwitch®-TNZ series, designed for isolated power conversion applications. This PMIC operates as a converter for offline buck, buck-boost, and flyback topologies at 66kHz switching frequency with 6W power handling capability. The device is classified as Active product status with full RoHS compliance and REACH unaffected designation. Substitute parts are necessary when addressing supply chain constraints, inventory availability, or when application power requirements differ from the primary specification while maintaining electrical and mechanical compatibility within the LinkSwitch®-TNZ family.

Substiute Parts

LNK3304D-TL

Power IntegrationsIn Stock: 2311LNK3304D-TL Datasheet

Current PartRFQ

LNK3302D-TL

Power IntegrationsIn Stock: 11020LNK3302D-TL Datasheet

Parametric EquivalentRFQ

LNK3306D-TL

Power IntegrationsIn Stock: 2529LNK3306D-TL Datasheet

Parametric EquivalentRFQ

LNK3307D-TL

Power IntegrationsIn Stock: 3454LNK3307D-TL Datasheet

Parametric EquivalentRFQ

LNK3312D-TL

Power IntegrationsIn Stock: 3567LNK3312D-TL Datasheet

Parametric EquivalentRFQ

LNK3314D-TL

Power IntegrationsIn Stock: 3308LNK3314D-TL Datasheet

Parametric EquivalentRFQ

LNK3316D-TL

Power IntegrationsIn Stock: 3469LNK3316D-TL Datasheet

Parametric EquivalentRFQ

LNK3317D-TL

Power IntegrationsIn Stock: 5857LNK3317D-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the LinkSwitch®-TNZ family is determined by strict adherence to the following invariant parameters:

Fixed Electrical Parameters (Non-Negotiable for Substitution):

• Voltage - Breakdown: 725V
• Frequency - Switching: 66kHz
• Voltage - Start Up: 18V
• Duty Cycle: 69%
• Output Isolation: Isolated
• Internal Switch(s): Yes
• Topology: Buck, Buck-Boost, Flyback
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
• Control Features: EN, Soft Start
• Operating Temperature: -40°C ~ 150°C (TJ)

Fixed Mechanical Parameters (Non-Negotiable for Substitution):

• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Supplier Device Package: SO-8C
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Variable Parameter (Allows Substitution):

• Power (Watts): 3W, 6W, or 12W ratings

All substitute parts maintain identical electrical characteristics, protection features, control functionality, and physical packaging. The power rating variation accommodates different application requirements while preserving circuit topology compatibility and thermal operating range. All substitute parts are Active status, RoHS Compliant, and REACH Unaffected.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status with identical RoHS Compliance and REACH Unaffected certifications. Selection between LNK3304D-TL and substitute parts is based on application power requirements and inventory availability:

For 6W Applications: LNK3304D-TL and LNK3314D-TL are electrically equivalent. Both support 6W power handling with identical electrical specifications and packaging. Selection between these two parts depends on supply chain availability and inventory levels.

For 3W Applications: LNK3302D-TL and LNK3312D-TL are electrically equivalent. Both support 3W power handling with identical electrical specifications and packaging. LNK3302D-TL offers higher inventory availability (10976 pcs).

For 12W Applications: LNK3306D-TL, LNK3307D-TL, LNK3316D-TL, and LNK3317D-TL are electrically equivalent. All support 12W power handling with identical electrical specifications and packaging. LNK3317D-TL offers highest inventory availability (5798 pcs).

All parts share identical voltage ratings (725V breakdown), switching frequency (66kHz), startup voltage (18V), duty cycle (69%), isolation characteristics, protection features, control functionality, and thermal operating range (-40°C to 150°C). Physical packaging is identical across all variants: 8-SOIC with 7 leads, SO-8C supplier package, surface mount configuration, and MSL 3 moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can LNK3304D-TL be directly replaced with LNK3314D-TL?

A: Yes. Both parts are rated for 6W power handling and share identical electrical specifications including 725V breakdown voltage, 66kHz switching frequency, 18V startup voltage, 69% duty cycle, isolated output, and identical fault protection and control features. Both use the same 8-SOIC package with 7 leads. Direct substitution is supported at the circuit board level without design modifications.

Q: What is the difference between 3W, 6W, and 12W rated parts in the LinkSwitch®-TNZ family?

A: The power rating indicates the maximum continuous power handling capability of the device. All other electrical parameters remain identical: breakdown voltage, switching frequency, startup voltage, duty cycle, topology support, protection features, and control functionality. Selection of power rating depends on the application's power delivery requirements. A 12W-rated part can be used in applications designed for lower power, but a 3W-rated part cannot be used in applications requiring 6W or 12W output.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use identical packaging: 8-SOIC (0.154", 3.90mm Width) with 7 leads in SO-8C supplier package configuration. Surface mount footprints are identical across all variants. PCB layout and land patterns require no modification when substituting between any parts in this list.

Q: Do all parts have the same thermal operating range?

A: Yes. All parts operate across the identical temperature range of -40°C to 150°C (junction temperature). Thermal performance characteristics are consistent across the family.

Q: What compliance certifications apply to all substitute parts?

A: All parts are RoHS Compliant and REACH Unaffected. All parts carry Active product status. Moisture sensitivity level is MSL 3 (168 Hours) for all variants. All parts are supplied in Tape & Reel (TR) packaging.

Q: Can a 12W-rated part be used in a circuit designed for 6W operation?

A: Yes. A higher power-rated part can be used in lower power applications. The 12W-rated parts (LNK3306D-TL, LNK3307D-TL, LNK3316D-TL, LNK3317D-TL) are electrically compatible with circuits designed for 6W or 3W operation. The device will operate within its specified parameters at the lower power level.

Q: Are there any differences in fault protection between substitute parts?

A: No. All parts include identical fault protection: Current Limiting, Open Loop, Over Temperature, Over Voltage, and Short Circuit protection. All parts include identical control features: Enable (EN) and Soft Start functionality.

Q: What is the significance of the base product number (e.g., LNK3304 vs. LNK3314)?

A: The base product number identifies the specific variant within the LinkSwitch®-TNZ series. The suffix "D-TL" indicates the specific package and lead configuration (8-SOIC, Tape & Reel). Parts with different base numbers but identical electrical specifications are functionally equivalent for substitution purposes.