FSD106LG Equivalent & Substitute Parts

Part Overview

The FSD106LG is an offline switch IC manufactured by onsemi, designed for power management applications in converter offline topology. This component is classified as obsolete, which necessitates identification of active equivalent parts for continued system design and maintenance. The FSD106LG operates as a control IC for offline power conversion circuits, making substitute selection critical for maintaining functional compatibility in legacy and new designs.

Substiute Parts

FSD106LG

onsemiIn Stock: 35223FSD106LG Datasheet

Current PartRFQ

FSL106MR

onsemiIn Stock: 2265FSL106MR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The FSL106MR qualifies as a functional substitute for the FSD106LG based on the following substitution criteria:

Common Functional Basis:

• Manufacturer: onsemi (same manufacturer ensures design continuity and support)
• Category: Power Management (PMIC) (identical functional classification)
• Primary Function: IC OFFLINE SWITCH (both serve offline switching control)
• Base Product Family: FSD106 / FSL106 (related product lines within onsemi's offline switch portfolio)

Substitution Logic: The FSL106MR represents an active, production-qualified alternative within onsemi's offline switch IC family. While the FSD106LG operates in a generic offline topology, the FSL106MR implements a specific flyback topology variant with defined electrical parameters. This substitution is valid for applications requiring offline switch functionality where the FSL106MR's specified operating parameters align with system requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The FSD106LG is obsolete, while the FSL106MR is active and in production. Selection of the FSL106MR ensures access to current manufacturing support, quality assurance, and supply chain continuity.

Compliance & Certifications: Both parts maintain REACH Unaffected status. The FSL106MR additionally carries ROHS3 Compliant certification, meeting current regulatory requirements for electronic components in restricted substance directives.

Functional Alignment: Both components serve offline switch control functions within onsemi's product portfolio. The FSL106MR's active status and specified electrical parameters (67kHz switching frequency, 650V breakdown voltage, 8V–26V supply range, 10W power rating) provide defined performance characteristics suitable for offline converter applications.

Frequently Asked Questions (FAQ)

Q: Can FSL106MR directly replace FSD106LG in existing designs? A: The FSL106MR is functionally equivalent as an offline switch IC from the same manufacturer. However, the FSL106MR is packaged in 8-DIP through-hole format. Verify that your PCB layout and mounting requirements are compatible with this package specification before implementation.

Q: What are the key differences between FSD106LG and FSL106MR? A: The primary differences are product status (obsolete vs. active), topology specificity (generic offline vs. defined flyback), and packaging (unspecified vs. 8-DIP through-hole). The FSL106MR provides explicit electrical parameters including 67kHz switching frequency, 650V breakdown voltage, and 10W power rating.

Q: Are there compliance differences between these parts? A: Both parts maintain REACH Unaffected status. The FSL106MR carries ROHS3 Compliant certification, ensuring compliance with current restriction of hazardous substances requirements. The FSD106LG's compliance status for RoHS is not specified.

Q: What is the package compatibility consideration? A: The FSL106MR uses 8-DIP (0.300", 7.62mm) through-hole packaging. Confirm your application supports through-hole mounting and 8-pin DIP footprint spacing before selecting this substitute.

Q: Why is the FSD106LG obsolete? A: The FSD106LG's obsolete status indicates it is no longer in active production. The FSL106MR represents onsemi's current-generation equivalent within the offline switch IC family, providing ongoing manufacturing and support.