LC5222S LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5222S is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for offline PWM dimming applications with 400mA output capability. This device operates across a wide supply voltage range of 25V to 200V and supports both step-down (buck) and step-up (boost) topologies with an integrated internal switch. The LC5222S is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the core functional parameters: AC DC offline switching topology, PWM dimming capability, 400mA output current, and surface mount packaging in 8-pin configurations.

Substiute Parts

LC5222S

Sanken Electric USA Inc.In Stock: 701LC5222S Datasheet

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AL9902FDF-13

Diodes IncorporatedIn Stock: 1068AL9902FDF-13 Datasheet

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FL7733AMX

onsemiIn Stock: 40232FL7733AMX Datasheet

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HV9801ANG-G

Microchip TechnologyIn Stock: 1909HV9801ANG-G Datasheet

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LM3497MX/NOPB

Texas InstrumentsIn Stock: 98909LM3497MX/NOPB Datasheet

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LNK416LG

Power IntegrationsIn Stock: 1716LNK416LG Datasheet

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LYT1404D-TL

Power IntegrationsIn Stock: 1135LYT1404D-TL Datasheet

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MP4021GS-A

Monolithic Power Systems Inc.In Stock: 1158MP4021GS-A Datasheet

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MP4032-2GS-Z

Monolithic Power Systems Inc.In Stock: 35483MP4032-2GS-Z Datasheet

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MP4068GS

Monolithic Power SystemsIn Stock: 966MP4068GS Datasheet

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MP4088GJ-P

Monolithic Power Systems Inc.In Stock: 1126MP4088GJ-P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the LC5222S is based on the following critical parameters that define functional equivalence:

Primary Substitution Criteria:

• Type: AC DC Offline Switcher (mandatory)
• Topology: Step-Down (Buck), Step-Up (Boost) or compatible subset
• Dimming: PWM capability (mandatory)
• Internal Switch(s): Yes (preferred for pin-compatible alternatives)
• Number of Outputs: 1 (mandatory)
• Current - Output / Channel: 400mA or greater
• Voltage - Supply Range: Overlap with 25V-200V minimum
• Mounting Type: Surface Mount (mandatory)
• Operating Temperature: -40°C minimum to 105°C minimum

Secondary Compatibility Factors:

• Package compatibility: 8-pin surface mount packages (8-SOIC, 8-SOP, TSOT-23-5)
• RoHS and MSL compliance for production continuity
• Product status: Active parts preferred for long-term availability

Substitute parts are grouped into two categories: direct topology matches (buck-boost with PWM) and functional alternatives (single topology with PWM or alternative dimming methods). Parts with reduced supply voltage ranges, different topologies, or alternative dimming methods are included where they provide functional equivalence within specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Functional Equivalents (Recommended for LC5222S Replacement):

AL9902FDF-13 (Diodes Incorporated) provides the closest functional match with buck-boost topology, PWM dimming, internal switch, and 400mA output current. Supply voltage range extends to 500V, exceeding LC5222S specifications. Active product status ensures long-term availability. ROHS3 compliant with MSL-3 rating. Package change from 8-SOIC to 12-UDFN requires PCB layout modification.

Tier 2 - Topology-Compatible Alternatives:

LNK416LG (Power Integrations) offers higher current capability (1.5A) with PWM dimming and internal switch in flyback topology. Supply voltage range (36V-725V) exceeds LC5222S. Active status and RoHS compliance confirmed. Through-hole eSIP-7F package requires different mounting approach. Suitable for applications requiring higher current or extended voltage range.

MP4032-2GS-Z (Monolithic Power Systems Inc.) maintains buck-boost topology with internal switch and triac dimming in 8-SOIC package. Supply voltage range (10.3V-27V) is narrower than LC5222S. Active status with ROHS3 compliance. MSL-2 rating requires controlled storage. Triac dimming differs from PWM but provides functional dimming capability.

Tier 3 - Single-Topology Alternatives:

HV9801ANG-G (Microchip Technology) provides PWM dimming with buck topology and wide supply voltage range (15V-450V). No internal switch; external switch required. 16-SOIC package larger than LC5222S. Active status with RoHS3 compliance. Suitable where external switching is acceptable.

FL7733AMX (onsemi) offers analog dimming with multiple topology support (flyback, buck, boost) in 8-SOIC package. No internal switch. Supply voltage limited to 30V maximum. Active status with high inventory (40,200 pcs). Analog dimming differs from PWM. Suitable for low-voltage applications.

Compliance and Availability:

All recommended substitutes maintain RoHS compliance. AL9902FDF-13 and MP4032-2GS-Z show highest inventory levels (1,054 and 35,400 pcs respectively), ensuring production continuity. Product status verification confirms all alternatives are active, eliminating obsolescence risk associated with LC5222S.

Frequently Asked Questions (FAQ)

Q: Can AL9902FDF-13 directly replace LC5222S without circuit modification?

A: AL9902FDF-13 provides functional equivalence in topology, dimming method, and output current. However, package change from 8-SOIC to 12-UDFN requires PCB layout redesign. Pin configuration differs; schematic review is necessary. Supply voltage range expansion (20V-500V vs. 25V-200V) is compatible with LC5222S applications.

Q: What is the primary difference between PWM and Triac dimming in these LED drivers?

A: PWM dimming modulates the switching frequency to control LED brightness, used in LC5222S and AL9902FDF-13. Triac dimming uses phase-angle control compatible with AC mains dimmers, found in MP4032-2GS-Z and MP4088GJ-P. Application requirements determine which dimming method is appropriate.

Q: Why do some substitute parts have lower maximum supply voltages than LC5222S?

A: MP4032-2GS-Z (27V max) and MP4088GJ-P (5V max) are designed for lower-voltage applications. These parts are not suitable for LC5222S applications requiring 25V-200V operation. Selection must match the specific supply voltage range of the target application.

Q: Is internal switch presence critical for LC5222S substitution?

A: Internal switch simplifies circuit design by eliminating external switching components. AL9902FDF-13 and LNK416LG include internal switches, matching LC5222S. HV9801ANG-G and FL7733AMX lack internal switches, requiring external switch implementation. Application complexity and PCB space determine whether internal switch is mandatory.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates storage and handling requirements. LC5222S has MSL-1 (unlimited shelf life). AL9902FDF-13 has MSL-3 (168-hour limit after packaging opening). MP4032-2GS-Z has MSL-2 (1-year limit). Higher MSL ratings require controlled storage environments and faster assembly timelines.

Q: Can LNK416LG replace LC5222S in all applications?

A: LNK416LG provides higher current (1.5A vs. 400mA) and extended voltage range (36V-725V). Flyback topology differs from LC5222S buck-boost topology. Through-hole eSIP-7F package requires different mounting. Suitable for applications requiring higher current; unsuitable for direct pin-compatible replacement.

Q: How does package size affect substitution feasibility?

A: LC5222S uses 8-SOIC (0.173" width). AL9902FDF-13 uses 12-UDFN (different footprint). HV9801ANG-G uses 16-SOIC (larger). LNK416LG uses through-hole eSIP-7F. Package differences require PCB redesign. Only FL7733AMX and MP4021GS-A share 8-SOIC package, enabling potential drop-in replacement with schematic verification.

Q: What is the significance of "Active" product status for substitutes?

A: Active status indicates ongoing manufacturer support, production availability, and long-term supply continuity. All recommended substitutes are active, eliminating obsolescence risk. LC5222S obsolete status necessitates migration to active alternatives for new designs and production sustainability.