LNK615DG-TL Equivalent & Substitute Parts

Part Overview

The LNK615DG-TL is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch®-II series. This isolated power management IC operates at switching frequencies up to 85 kHz and delivers 5.1 W output power in an 8-SOIC package. The device is Active status and widely used in isolated offline power supply applications requiring flyback topology conversion.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for supply chain optimization, or when power output specifications allow selection from the LinkSwitch®-II family with different rated power levels while maintaining electrical and mechanical compatibility.

Substiute Parts

LNK615DG-TL

Power IntegrationsIn Stock: 23855LNK615DG-TL Datasheet

Current PartRFQ

LNK603DG-TL

Power IntegrationsIn Stock: 25330LNK603DG-TL Datasheet

Parametric EquivalentRFQ

LNK604DG-TL

Power IntegrationsIn Stock: 55235LNK604DG-TL Datasheet

Parametric EquivalentRFQ

LNK605DG-TL

Power IntegrationsIn Stock: 40470LNK605DG-TL Datasheet

Parametric EquivalentRFQ

LNK606DG-TL

Power IntegrationsIn Stock: 40834LNK606DG-TL Datasheet

Parametric EquivalentRFQ

LNK614DG-TL

Power IntegrationsIn Stock: 5670LNK614DG-TL Datasheet

Parametric EquivalentRFQ

LNK616DG-TL

Power IntegrationsIn Stock: 67804LNK616DG-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the LinkSwitch®-II family is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Topology: Flyback (all substitutes maintain this topology)
• Output Isolation: Isolated (all substitutes are isolated)
• Voltage - Breakdown: 700V (all substitutes maintain this rating)
• Frequency - Switching: Up to 85 kHz (all substitutes operate at this frequency)
• Duty Cycle: 55% (all substitutes maintain this specification)
• Operating Temperature Range: -40°C ~ 150°C (TJ) (all substitutes maintain this range)
• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads (all substitutes use identical package)
• Supplier Device Package: SO-8C (all substitutes use this package designation)
• Mounting Type: Surface Mount (all substitutes are surface mount)
• Fault Protection: Current Limiting, Open Loop, Over Temperature, Short Circuit (all substitutes include these protections)

Variable Parameter:

• Power (Watts): The LNK615DG-TL is rated at 5.1 W. Substitute parts range from 3.3 W to 6.1 W within the LinkSwitch®-II series. Selection depends on application power requirements.

Packaging Format Variation:

• LNK615DG-TL is supplied in Cut Tape (CT) & Digi-Reel® format
• Substitute parts are available in either Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) formats
• Packaging format does not affect electrical or mechanical compatibility

All substitute parts are Active status, RoHS Compliant, MSL 1, and REACH Unaffected, matching the compliance profile of the main part.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Same Power Rating):

LNK605DG-TL is electrically identical to LNK615DG-TL at 5.1 W output power. Both parts maintain identical electrical specifications and thermal operating range. Selection between these two is determined by packaging format availability: LNK615DG-TL in Cut Tape & Digi-Reel® format or LNK605DG-TL in Cut Tape & Digi-Reel® format.

Higher Power Alternatives:

LNK606DG-TL and LNK616DG-TL both deliver 6.1 W output power. These parts are suitable for applications where the LNK615DG-TL's 5.1 W rating is insufficient. Both maintain identical electrical characteristics and thermal performance. LNK606DG-TL is available in Tape & Reel format with 40,800 pcs inventory. LNK616DG-TL is available in Tape & Reel format with 67,700 pcs inventory.

Lower Power Alternatives:

LNK603DG-TL delivers 3.3 W and LNK604DG-TL delivers 4.1 W. These parts are suitable for applications with lower power requirements. LNK604DG-TL is available in Cut Tape & Digi-Reel® format with 55,200 pcs inventory. LNK603DG-TL is available in Tape & Reel format with 25,300 pcs inventory.

Packaging Format Considerations:

All substitute parts maintain the 8-SOIC package footprint and pinout. Packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) does not affect PCB assembly compatibility. Format selection is based on supply chain and manufacturing process requirements.

Compliance and Regulatory Status:

All substitute parts are Active status, RoHS Compliant, MSL 1 (Unlimited moisture sensitivity), and REACH Unaffected. All parts carry identical regulatory certifications and are suitable for equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can LNK605DG-TL replace LNK615DG-TL in my design?

A: Yes. LNK605DG-TL is electrically and mechanically identical to LNK615DG-TL. Both deliver 5.1 W output power, operate at identical switching frequencies, maintain the same 700V breakdown voltage, and use the 8-SOIC package. The parts differ only in packaging format (both available in Cut Tape & Digi-Reel®). No design changes are required.

Q: What is the difference between Cut Tape & Digi-Reel® and Tape & Reel packaging?

A: Both packaging formats contain the same IC in the 8-SOIC package. Cut Tape & Digi-Reel® format is supplied on cut tape with reel compatibility. Tape & Reel format is supplied on continuous reel. The electrical and mechanical specifications are identical. Selection depends on manufacturing equipment and supply chain requirements.

Q: Can I use LNK606DG-TL or LNK616DG-TL (6.1 W) instead of LNK615DG-TL (5.1 W)?

A: Yes, from an electrical and mechanical compatibility standpoint. LNK606DG-TL and LNK616DG-TL maintain all critical electrical parameters: 700V breakdown voltage, up to 85 kHz switching frequency, 55% duty cycle, -40°C to 150°C operating range, and 8-SOIC package. The higher power rating (6.1 W versus 5.1 W) does not create incompatibility. Application design must confirm that the higher power capability does not introduce thermal or circuit design issues.

Q: Can I use LNK603DG-TL or LNK604DG-TL (lower power ratings) instead of LNK615DG-TL?

A: Electrical and mechanical compatibility exists. LNK603DG-TL (3.3 W) and LNK604DG-TL (4.1 W) maintain identical electrical specifications and package format. However, application design must confirm that the lower power rating is sufficient for the intended circuit. Using a lower-rated part in a design requiring 5.1 W output will result in insufficient power delivery.

Q: Are all these parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH Unaffected status, matching the compliance profile of LNK615DG-TL.

Q: What fault protection features are included in substitute parts?

A: All substitute parts include identical fault protection: Current Limiting, Open Loop, Over Temperature, and Short Circuit protection. No differences exist in protection architecture across the LinkSwitch®-II family members listed.

Q: Do all substitute parts use the same pinout?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package with 7 leads. Pinout is identical across all parts. PCB layout and schematic connections require no modification when substituting between these parts.

Q: What is the operating temperature range for all these parts?

A: All parts operate across -40°C to 150°C junction temperature (TJ). No thermal performance differences exist between substitute parts.