LNK6763V Equivalent & Substitute Parts

Part Overview

The LNK6763V 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 with 25W output power capability and integrated fault protection including current limiting, overload, overvoltage, and short circuit protection. The device is Active status and RoHS compliant. Alternative models become necessary when higher power output requirements exist, inventory constraints occur, or design specifications require different power ratings within the same topology and package family.

Substiute Parts

LNK6763V

Power IntegrationsIn Stock: 983LNK6763V 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 LNK6763V are determined by strict equivalence in the following critical parameters:

• Manufacturer: Power Integrations (same source)
• Series: LinkSwitch™-HP (same IC family)
• Topology: Flyback (same converter architecture)
• Output Isolation: Isolated (same isolation requirement)
• Voltage - Breakdown: 650V (same voltage rating)
• Frequency - Switching: 120kHz ~ 136kHz (same operating frequency)
• Duty Cycle: 64% (same duty cycle)
• Package / Case: 12-SDIP eDIP-12 (same physical form factor)
• Mounting Type: Through Hole (same mounting method)
• Operating Temperature: -40°C ~ 150°C (same thermal range)
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit (same protection features)

The primary differentiator among substitute parts is Power (Watts) output rating. LNK6664V and LNK6768V maintain all critical electrical and mechanical parameters while offering different power handling capabilities (28W and 47W respectively).

Parameter Comparison

Engineering Selection Recommendations

All three parts—LNK6763V, LNK6664V, and LNK6768V—are Active status products from Power Integrations and maintain RoHS compliance and REACH unaffected status. Selection between these parts is based on power output requirements:

LNK6763V (25W): Select when the application requires 25W output power and standard moisture sensitivity handling (MSL 1).

LNK6664V (28W): Select when the application requires up to 28W output power. This part offers higher availability (35,400 pcs in stock) and maintains MSL 1 moisture sensitivity level.

LNK6768V (47W): Select when the application requires up to 47W output power. This part accommodates higher power demands within the same package and topology. Note MSL 3 (168 Hours) moisture sensitivity level applies.

All substitute parts share identical electrical characteristics (650V breakdown voltage, 120kHz-136kHz switching frequency, 64% duty cycle, isolated topology) and mechanical compatibility (12-SDIP eDIP-12 package, through-hole mounting, -40°C to 150°C operating range). Direct substitution is permissible when power rating requirements align with the selected part's specification.

Frequently Asked Questions (FAQ)

Q: Can LNK6664V replace LNK6763V in an existing design?

A: Yes. LNK6664V maintains identical electrical parameters (650V breakdown, 120kHz-136kHz switching frequency, 64% duty cycle, isolated topology) and physical package (12-SDIP eDIP-12, through-hole mounting). The 28W rating accommodates applications designed for 25W. Both parts have MSL 1 moisture sensitivity.

Q: Can LNK6768V replace LNK6763V?

A: Yes, with consideration of moisture sensitivity. LNK6768V shares all critical electrical and mechanical parameters with LNK6763V. The 47W power rating is suitable for 25W applications. However, LNK6768V has MSL 3 (168 Hours) versus LNK6763V's MSL 1 (Unlimited), requiring appropriate moisture control during storage and handling.

Q: Are these parts pin-compatible?

A: Yes. All three parts use the 12-SDIP (0.412", 10.46mm) package with 11 leads and exposed pad. Through-hole mounting is identical across all variants.

Q: What determines substitution eligibility?

A: Substitution is valid when the replacement part maintains: same manufacturer (Power Integrations), same series (LinkSwitch™-HP), same topology (Flyback), same isolation (Isolated), same voltage rating (650V), same switching frequency (120kHz-136kHz), same duty cycle (64%), same package (12-SDIP eDIP-12), same mounting type (Through Hole), and same operating temperature range (-40°C to 150°C). Power rating must meet or exceed application requirements.

Q: What is the difference in power output between these parts?

A: LNK6763V provides 25W, LNK6664V provides 28W, and LNK6768V provides 47W. Selection depends on the maximum power the application requires.

Q: Are all parts RoHS compliant?

A: Yes. LNK6763V, LNK6664V, and LNK6768V are all RoHS compliant and REACH unaffected.

Q: What is the significance of MSL rating differences?

A: Moisture Sensitivity Level (MSL) indicates moisture handling requirements. LNK6763V and LNK6664V have MSL 1 (Unlimited), allowing indefinite storage without moisture control. LNK6768V has MSL 3 (168 Hours), requiring moisture control measures and limiting storage time to 168 hours after moisture exposure.