LC5523F LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5523F is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for single-output lighting applications. This component features an internal switch and operates across a supply voltage range up to 20V, with an operating temperature range of -55°C to 115°C. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

LC5523F

Sanken Electric USA Inc.In Stock: 1906LC5523F Datasheet

Current PartRFQ

LNK406EG

Power IntegrationsIn Stock: 17337LNK406EG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The LNK406EG qualifies as a functional substitute for the LC5523F based on the following alignment of critical parameters:

Substitution Criteria:

• Both devices function as AC DC offline switcher LED driver ICs with single output configuration
• Both incorporate internal switching capability for power conversion
• Both are RoHS compliant and rated for through-hole mounting
• Both support dimming functionality for LED applications
• Both maintain compliance with EAR99 export classification and identical HTSUS coding (8542.39.0001)

Key Differences Requiring Design Review:

• Supply voltage range: LC5523F operates to 20V maximum; LNK406EG operates 36V to 725V
• Package form factor: LC5523F uses TO-220-7; LNK406EG uses eSIP-7C
• Output current capability: LNK406EG rated at 1.5A per channel
• Operating temperature: LNK406EG extends to 150°C (TJ) versus 115°C (TA) for LC5523F
• Topology: LNK406EG implements flyback topology with triac dimming

Parameter Comparison

Engineering Selection Recommendations

The LNK406EG is an active product from Power Integrations and represents the primary equivalent for the obsolete LC5523F. Selection of this substitute is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• RoHS compliance matching the original component specification
• Identical export classification and tariff coding
• Through-hole mounting compatibility with existing PCB designs
• Single-output LED driver architecture aligned with the original application

Design implementation with the LNK406EG requires verification of the following circuit-level considerations: supply voltage range compatibility (36V minimum versus 20V maximum of the original), package footprint adaptation from TO-220-7 to eSIP-7C, and thermal management assessment given the extended operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the LNK406EG directly replace the LC5523F without PCB modification?

A: Package form factors differ (TO-220-7 versus eSIP-7C), requiring PCB footprint redesign. Pin configuration and functional mapping must be verified against both datasheets before implementation.

Q: What is the primary reason for substitution?

A: The LC5523F is classified as obsolete. The LNK406EG is an active product offering equivalent LED driver functionality with extended availability.

Q: Are there compliance concerns with this substitution?

A: Both components maintain RoHS compliance and identical ECCN/HTSUS classifications, eliminating regulatory barriers to substitution.

Q: How do the supply voltage ranges affect substitution feasibility?

A: The LNK406EG operates at higher input voltages (36V–725V) compared to the LC5523F (maximum 20V). Circuit design must accommodate this specification difference.

Q: What thermal considerations apply to the LNK406EG?

A: The LNK406EG operates to 150°C junction temperature, exceeding the LC5523F specification of 115°C ambient temperature. Thermal design review is recommended for high-temperature applications.

Q: Is the LNK406EG suitable for triac dimming applications?

A: Yes. The LNK406EG explicitly supports triac dimming, making it suitable for dimmable LED lighting designs.