LC5226D LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5226D is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for offline power management applications with PWM dimming capability. This 8-DIP through-hole component delivers 800mA output current and operates across a 25V to 400V supply range. The product is currently obsolete, making equivalent and substitute parts essential for design continuity, legacy system maintenance, and component sourcing in applications where the LC5226D is no longer available from primary channels.

Substiute Parts

LC5226D

Sanken Electric USA Inc.In Stock: 1055LC5226D Datasheet

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HV9921N3-G

Microchip TechnologyIn Stock: 5375HV9921N3-G Datasheet

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IRS2982STRPBF

Infineon TechnologiesIn Stock: 5245IRS2982STRPBF Datasheet

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MP4001DS-LF-Z

Monolithic Power Systems Inc.In Stock: 63996MP4001DS-LF-Z Datasheet

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MP4088GS

Monolithic Power Systems Inc.In Stock: 842MP4088GS Datasheet

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RT8458AGJ6

Richtek USA Inc.In Stock: 56124RT8458AGJ6 Datasheet

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TS19705CX6 RFG

Taiwan Semiconductor CorporationIn Stock: 12980TS19705CX6 RFG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC5226D requires matching on the following critical parameters: AC DC offline switcher topology, single output configuration, PWM dimming capability, and supply voltage range compatibility. The LC5226D operates from 25V to 400V with 800mA output current and includes an internal switch. Substitute parts must support offline switching applications with comparable voltage handling and dimming methodology.

The substitute parts are grouped into two categories based on functional alignment:

Category 1: Direct Topology Match (Buck/Boost with PWM Dimming)

• MP4001DS-LF-Z: Buck topology with PWM dimming, 12V–450V supply range, surface mount alternative
• TS19705CX6 RFG: Multi-topology (Flyback, Buck, Boost) with 9.5V–40V supply range, surface mount alternative

Category 2: Alternative Topologies (Triac or Flyback Dimming)

• HV9921N3-G: Buck topology with Triac dimming, 20V–400V supply range, through-hole TO-92-3 package
• RT8458AGJ6: Buck topology with Analog dimming, 17V–31V supply range, surface mount TSOT-23-6
• IRS2982STRPBF: Flyback topology, 11.5V–18V supply range, surface mount 8-SOIC
• MP4088GS: Buck/Boost topology with Triac dimming, 4.5V–5V supply range, surface mount 8-SOIC

Parameter Comparison

Engineering Selection Recommendations

For Direct PWM Dimming Replacement with High Voltage Support: MP4001DS-LF-Z is the primary substitute when PWM dimming and high supply voltage (up to 450V) are required. This part maintains Buck topology with PWM dimming and supports the full voltage range of the LC5226D. The transition from through-hole 8-DIP to surface-mount 8-SOIC requires PCB redesign. MP4001DS-LF-Z holds active product status with ROHS3 compliance and automotive-grade qualification.

For Through-Hole Package Continuity: HV9921N3-G preserves the through-hole mounting format (TO-92-3) and supports the full 400V maximum supply voltage of the LC5226D. This part uses Triac dimming instead of PWM and reduces output current capability to 20mA. HV9921N3-G is active, ROHS3 compliant, and suitable for applications where package footprint compatibility is critical.

For Multi-Topology Flexibility: TS19705CX6 RFG offers Flyback, Buck, and Boost topology options within a single device, providing design flexibility for offline switching applications. Supply voltage range is limited to 9.5V–40V, which does not fully cover the LC5226D's 25V–400V range. This part is active and ROHS3 compliant with surface-mount SOT-23-6 packaging.

For Analog Dimming Applications: RT8458AGJ6 provides Buck topology with Analog dimming control, operating from 17V to 31V. This part is suitable for applications requiring continuous analog dimming rather than PWM control. Operating temperature extends to 125°C (TJ), and the part is active with ROHS3 compliance.

For Specialized Topologies: IRS2982STRPBF (Flyback, 11.5V–18V) and MP4088GS (Buck/Boost with Triac, 4.5V–5V) address specific topology and voltage requirements but do not provide full compatibility with the LC5226D's voltage and current specifications. These parts are active and ROHS3 compliant but are suitable only for applications with different electrical requirements.

All substitute parts carry ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can MP4001DS-LF-Z directly replace LC5226D in existing designs? A: MP4001DS-LF-Z matches the PWM dimming and high-voltage supply requirements of the LC5226D but requires PCB redesign due to the transition from through-hole 8-DIP to surface-mount 8-SOIC packaging. Electrical compatibility is confirmed for Buck topology and PWM dimming applications.

Q: Why does HV9921N3-G use Triac dimming instead of PWM? A: HV9921N3-G is designed for Triac-based dimming control, which is a different dimming methodology than PWM. Applications requiring PWM dimming must select alternatives such as MP4001DS-LF-Z or TS19705CX6 RFG.

Q: What is the voltage range limitation of TS19705CX6 RFG? A: TS19705CX6 RFG operates from 9.5V to 40V, which does not cover the full 25V–400V range of the LC5226D. This part is suitable only for applications operating within the 9.5V–40V window.

Q: Is IRS2982STRPBF suitable for high-voltage offline switching? A: IRS2982STRPBF operates from 11.5V to 18V and is not suitable for the LC5226D's 25V–400V supply range. This part is designed for lower-voltage offline switching applications.

Q: What are the package considerations when switching from LC5226D? A: The LC5226D uses through-hole 8-DIP packaging. Most active substitutes use surface-mount packages (8-SOIC, TSOT-23-6, SOT-23-6). Only HV9921N3-G maintains through-hole mounting (TO-92-3). Package selection depends on PCB design constraints and manufacturing capabilities.

Q: Are all substitute parts RoHS compliant? A: Yes, all substitute parts listed carry ROHS3 compliance, meeting current environmental and regulatory standards.

Q: Which substitute part has the widest operating temperature range? A: MP4001DS-LF-Z, IRS2982STRPBF, and MP4088GS all support -40°C to 125°C operating temperature range, exceeding the LC5226D's -40°C to 105°C range.