LNK6764V Equivalent & Substitute Parts

Part Overview

The LNK6764V 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 28W output power in a 12-EDIP package. The device is Active status and RoHS compliant, making it suitable for isolated offline power supply 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 without circuit redesign, subject to application power requirements and thermal constraints.

Substiute Parts

LNK6764V

Power IntegrationsIn Stock: 16779LNK6764V 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

Substitution eligibility for the LNK6764V is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Topology: Flyback
• Output Isolation: Isolated
• Voltage - Breakdown: 650V
• Frequency - Switching: 120–136 kHz
• Duty Cycle: 64%
• Package / Case: 12-SDIP (0.412", 10.46mm), 11 Leads, Exposed Pad
• Mounting Type: Through Hole
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit

Power Rating Consideration: Power output (28W for LNK6764V) is application-dependent. Substitute parts with equal or higher power ratings maintain compatibility with designs rated for the original part's power level. Parts with lower power ratings are not substitutes for the LNK6764V.

The LNK6664V matches all critical parameters and power rating (28W), qualifying as a parametric equivalent. The LNK6768V matches all critical parameters but delivers 47W, providing higher power capacity within the same electrical and mechanical envelope.

Parameter Comparison

Engineering Selection Recommendations

LNK6664V Selection: The LNK6664V is a direct parametric equivalent to the LNK6764V. All electrical characteristics, switching frequency, duty cycle, breakdown voltage, and package specifications are identical. Both parts deliver 28W output power. The LNK6664V carries identical RoHS compliance and REACH status. Moisture sensitivity level is MSL 1 (Unlimited) for both parts. This part is suitable for direct replacement in existing LNK6764V designs without circuit modification.

LNK6768V Selection: The LNK6768V shares identical electrical topology, switching frequency, duty cycle, breakdown voltage, and package specifications with the LNK6764V. The primary difference is increased power output (47W versus 28W). The LNK6768V is suitable for applications requiring higher power delivery within the same electrical and mechanical constraints. Moisture sensitivity level is MSL 3 (168 Hours), requiring controlled storage conditions. All parts maintain Active product status and full compliance certifications.

Compliance Considerations: All three parts are RoHS Compliant, REACH Unaffected, and carry EAR99 ECCN classification. Through-hole mounting and eDIP-12 packaging are consistent across all options.

Frequently Asked Questions (FAQ)

Q: Can LNK6664V replace LNK6764V in an existing design? A: Yes. The LNK6664V is a parametric equivalent with identical electrical specifications, switching frequency, duty cycle, breakdown voltage, and package configuration. No circuit redesign is required.

Q: What is the difference between LNK6764V and LNK6768V? A: Both parts share identical topology, switching frequency (120–136 kHz), duty cycle (64%), breakdown voltage (650V), and 12-SDIP package. The LNK6768V delivers 47W output power compared to 28W for the LNK6764V. The LNK6768V has MSL 3 (168 Hours) moisture sensitivity versus MSL 1 (Unlimited) for the LNK6764V.

Q: Can LNK6768V be used in place of LNK6764V? A: The LNK6768V is electrically and mechanically compatible with LNK6764V designs. The higher power rating (47W) does not prevent substitution in 28W applications. However, the MSL 3 moisture sensitivity level requires appropriate storage and handling protocols.

Q: Are all three parts through-hole mounted? A: Yes. LNK6764V, LNK6664V, and LNK6768V all use through-hole mounting in 12-SDIP (0.412", 10.46mm) packages with 11 leads and exposed pad.

Q: What is the operating temperature range for these parts? A: All three parts operate from −40°C to +150°C (junction temperature).

Q: Do these parts include fault protection? A: Yes. LNK6764V, LNK6664V, and LNK6768V all include integrated current limiting, overload, over-temperature, over-voltage, and short-circuit protection.

Q: Are these parts RoHS compliant? A: Yes. All three parts are RoHS Compliant and REACH Unaffected.