LNK3316D-TL Equivalent & Substitute Parts

Part Overview

The LNK3316D-TL is an offline switch IC manufactured by Power Integrations, part of the LinkSwitch®-TNZ series. This component functions as a converter offline switch supporting Buck, Buck-Boost, and Flyback topologies with a switching frequency of 66kHz and rated power output of 12W. The device is classified as a Power Management IC (PMIC) in the 8-SOIC surface mount package.

The LNK3316D-TL maintains Active product status with full RoHS compliance and REACH unaffected certification. Substitute parts are necessary when inventory constraints occur, when alternative power ratings are required for specific application designs, or when design flexibility across the LinkSwitch®-TNZ series is needed while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer	Power Integrations
Series	LinkSwitch®-TNZ
Package / Case	8-SOIC (0.154", 3.90mm Width), 7 Leads
Supplier Device Package	SO-8C
Mounting Type	Surface Mount
Voltage - Breakdown	725V
Topology	Buck, Buck-Boost, Flyback
Frequency - Switching	66kHz
Voltage - Start Up	18V
Duty Cycle	69%
Operating Temperature	-40°C ~ 150°C (TJ)
Output Isolation	Isolated
Internal Switch(s)	Yes
Fault Protection	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
Control Features	EN, Soft Start
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

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

Mandatory Compatibility Parameters:

Manufacturer: Power Integrations
Series: LinkSwitch®-TNZ
Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
Supplier Device Package: SO-8C
Mounting Type: Surface Mount
Voltage - Breakdown: 725V
Topology: Buck, Buck-Boost, Flyback
Frequency - Switching: 66kHz
Voltage - Start Up: 18V
Duty Cycle: 69%
Operating Temperature: -40°C ~ 150°C (TJ)
Output Isolation: Isolated
Internal Switch(s): Yes
Fault Protection: Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
Control Features: EN, Soft Start
RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 3 (168 Hours)

Variable Parameter (Application-Dependent):

Power (Watts): Available in 3W, 6W, and 12W ratings

All substitute parts listed maintain identical electrical characteristics, thermal specifications, protection features, and package specifications. The primary differentiation is power rating, which must be selected based on application requirements.

Parameter Comparison

Part Number	Power (Watts)	Voltage - Breakdown	Frequency - Switching	Topology	Package	Operating Temperature	Fault Protection	RoHS Status
LNK3316D-TL	12W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3302D-TL	3W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3304D-TL	6W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3306D-TL	12W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3307D-TL	12W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3312D-TL	3W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3314D-TL	6W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant
LNK3317D-TL	12W	725V	66kHz	Buck, Buck-Boost, Flyback	8-SOIC (SO-8C)	-40°C ~ 150°C	Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit	RoHS Compliant

Engineering Selection Recommendations

All substitute parts listed maintain Active product status within the Power Integrations LinkSwitch®-TNZ series. Each part carries full RoHS compliance certification and REACH unaffected status, ensuring regulatory compliance for industrial and commercial applications.

For 12W Applications: LNK3316D-TL, LNK3306D-TL, LNK3307D-TL, and LNK3317D-TL are electrically and mechanically interchangeable. Selection among these 12W variants is determined by application-specific requirements and inventory availability.

For 6W Applications: LNK3304D-TL and LNK3314D-TL provide equivalent functionality at reduced power rating.

For 3W Applications: LNK3302D-TL and LNK3312D-TL are suitable for lower power designs.

All parts share identical package specifications (8-SOIC SO-8C), thermal operating range (-40°C to 150°C), breakdown voltage (725V), switching frequency (66kHz), and protection feature sets. PCB layout and thermal management considerations remain consistent across all variants within the same power rating category.

Frequently Asked Questions (FAQ)

Q: Can I substitute LNK3316D-TL with a lower power rating part such as LNK3304D-TL?

A: Substitution from 12W to 6W is not recommended for applications designed for 12W output. The lower power rating indicates reduced current handling capability. Conversely, upgrading from a lower power rating to LNK3316D-TL (12W) is permissible if thermal management and PCB design accommodate the higher power dissipation.

Q: Are all substitute parts pin-compatible with LNK3316D-TL?

A: Yes. All substitute parts use the 8-SOIC (SO-8C) package with 7 leads and identical pinout configuration. Direct PCB replacement is possible without layout modification.

Q: What is the difference between LNK3316D-TL and LNK3306D-TL?

A: Both parts are rated at 12W with identical electrical specifications, topology support, switching frequency, and protection features. The primary difference is internal design optimization. Both are direct substitutes for 12W applications.

Q: Do all parts require the same startup voltage?

A: Yes. All substitute parts require 18V startup voltage. Input supply design remains unchanged across all variants.

Q: Are there any thermal management differences between power ratings?

A: Power dissipation varies with the rated power output. 12W variants (LNK3316D-TL, LNK3306D-TL, LNK3307D-TL, LNK3317D-TL) generate higher thermal output than 6W or 3W variants. PCB thermal design must accommodate the selected power rating. All parts operate within -40°C to 150°C junction temperature range.

Q: Can I use LNK3312D-TL (3W) in place of LNK3316D-TL (12W)?

A: No. The 3W rating indicates the part is designed for applications requiring maximum 3W output. Using it in a 12W application will result in insufficient power delivery and potential device failure.

Q: Are all parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS Compliant certification and REACH unaffected status, meeting environmental and regulatory requirements for industrial applications.

Q: What protection features are common across all variants?

A: All parts include Current Limiting, Open Loop, Over Temperature, Over Voltage, and Short Circuit protection. Control features include Enable (EN) and Soft Start functionality across all variants.

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