LNK6765V Equivalent & Substitute Parts

Part Overview

The LNK6765V is an offline switch flyback converter IC manufactured by Power Integrations, part of the LinkSwitch™-HP series. This isolated power management IC operates at 120kHz to 136kHz switching frequency and delivers 30W output power in a 12-EDIP package. The device is Active status and RoHS Compliant, designed for offline flyback topology applications requiring integrated current limiting, overload, over-temperature, over-voltage, and short-circuit protection.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement within the same application topology and package footprint, subject to power rating and thermal requirements of the target circuit.

Substiute Parts

LNK6765V

Power IntegrationsIn Stock: 7495LNK6765V Datasheet

Current PartRFQ

LNK6664V

Power IntegrationsIn Stock: 35437LNK6664V Datasheet

Parametric EquivalentRFQ

LNK6768V

Power IntegrationsIn Stock: 6170LNK6768V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LNK6765V are qualified based on strict parameter matching in the following categories:

Mandatory Matching Parameters:

• Manufacturer: Power Integrations
• Series: LinkSwitch™-HP
• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 650V
• Frequency - Switching: 120kHz ~ 136kHz
• Duty Cycle: 64%
• Package / Case: 12-SDIP (0.412", 10.46mm), 11 Leads, Exposed Pad
• Mounting Type: Through Hole
• Operating Temperature: -40°C ~ 150°C (TJ)
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit

Variable Parameters (Application-Dependent):

• Power (Watts): Substitutes must meet or exceed circuit power requirements
• Moisture Sensitivity Level (MSL): Substitutes may differ based on storage and assembly environment

The LNK6664V and LNK6768V meet all mandatory matching criteria and are classified as parametric equivalents within the LinkSwitch™-HP family.

Parameter Comparison

Engineering Selection Recommendations

LNK6664V Selection Criteria: The LNK6664V is a parametric equivalent with 28W power rating. This substitute is suitable for applications where the circuit power requirement does not exceed 28W. The LNK6664V maintains identical electrical characteristics, package footprint, and thermal operating range as the LNK6765V. Both devices carry MSL 1 rating, indicating unlimited shelf life under controlled storage conditions. RoHS Compliance and REACH Unaffected status are maintained.

LNK6768V Selection Criteria: The LNK6768V is a parametric equivalent with 47W power rating. This substitute is suitable for applications requiring higher power delivery than the LNK6765V. The LNK6768V maintains identical electrical characteristics, package footprint, and thermal operating range. The MSL rating differs at 3 (168 Hours), requiring controlled storage conditions with maximum 168-hour exposure to ambient conditions before assembly. RoHS Compliance and REACH Unaffected status are maintained.

Selection Logic:

• Use LNK6664V when circuit power demand is ≤28W
• Use LNK6765V for 30W applications (original specification)
• Use LNK6768V when circuit power demand is ≤47W or when higher power margin is required

All three parts are Active status products from Power Integrations, ensuring long-term availability and technical support.

Frequently Asked Questions (FAQ)

Q: Can LNK6664V replace LNK6765V in a 30W application? A: No. The LNK6664V is rated for 28W maximum output power. Applications requiring 30W operation must use LNK6765V or LNK6768V.

Q: Can LNK6768V replace LNK6765V in a 30W application? A: Yes. The LNK6768V is rated for 47W output power, exceeding the 30W requirement. All electrical parameters, package footprint, and thermal characteristics are identical. The device operates within the same -40°C to 150°C temperature range.

Q: What is the difference in Moisture Sensitivity Level (MSL) between these parts? A: LNK6765V and LNK6664V carry MSL 1 (Unlimited shelf life). LNK6768V carries MSL 3, requiring storage at controlled humidity with maximum 168-hour exposure to ambient conditions before assembly. MSL differences do not affect electrical performance but impact supply chain handling and storage requirements.

Q: Are all three parts RoHS Compliant? A: Yes. LNK6765V, LNK6664V, and LNK6768V are all RoHS Compliant and REACH Unaffected.

Q: Can these parts be used interchangeably on the same PCB? A: Yes, from a mechanical standpoint. All three parts use identical 12-SDIP (0.412", 10.46mm) package with 11 leads and exposed pad, mounted through-hole. PCB layout and footprint are identical. Selection depends on circuit power requirements and MSL handling capabilities.

Q: What is the switching frequency range for all substitute parts? A: All three parts operate at 120kHz to 136kHz switching frequency with 64% duty cycle.

Q: Do these parts require different thermal management? A: All parts operate within -40°C to 150°C junction temperature range. Thermal management requirements depend on circuit design and power dissipation, not on part selection among these three equivalents.