LC5511D LED Driver IC - Equivalent & Substitute Parts

Part Overview

The LC5511D is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for single-output lighting applications. This 8-DIP through-hole component features an internal switch and operates across a supply voltage range up to 20V with an operating temperature range of -55°C to 125°C. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. RoHS compliance and MSL-1 rating ensure suitability for standard manufacturing environments.

Substiute Parts

LC5511D

Sanken Electric USA Inc.In Stock: 970LC5511D Datasheet

Current PartRFQ

IRS2982STRPBF

Infineon TechnologiesIn Stock: 5245IRS2982STRPBF Datasheet

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LYT1403D-TL

Power IntegrationsIn Stock: 1018LYT1403D-TL Datasheet

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MP4060GK-Z

Monolithic Power Systems Inc.In Stock: 974MP4060GK-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LC5511D is determined by the following critical parameters:

• Product Category: All substitutes must be Power Management (PMIC) devices classified as AC DC Offline Switcher LED driver ICs
• Number of Outputs: Single-output configuration required
• Functional Type: AC DC offline switching topology for LED driver applications
• Operating Temperature Range: Minimum -40°C capability acceptable for most industrial applications; the LC5511D's extended -55°C lower limit is not a limiting factor for substitution
• RoHS Compliance: All substitutes maintain RoHS or ROHS3 compliance status
• Supply Voltage Compatibility: Substitutes must operate within overlapping or compatible voltage ranges for the intended application

The three qualified substitutes—IRS2982STRPBF, LYT1403D-TL, and MP4060GK-Z—meet these core criteria while offering active product status and improved availability compared to the obsolete LC5511D.

Parameter Comparison

Engineering Selection Recommendations

IRS2982STRPBF (Infineon Technologies): Active product status with ROHS3 compliance. Flyback topology with external switch requirement. Supply voltage range 11.5V–18V overlaps with LC5511D maximum. MSL-2 rating requires controlled storage conditions. Suitable for designs where external switching architecture is acceptable and supply voltage remains within specified range.

LYT1403D-TL (Power Integrations): Active product with RoHS compliance and MSL-1 rating matching LC5511D environmental specifications. Step-Down (Buck) topology with integrated switch. Operates on 90VAC–308VAC input, providing broader AC input range than LC5511D. LYTSwitch™-1 series designation indicates mature, production-qualified design. Recommended for lighting applications requiring extended AC input voltage range and unlimited moisture sensitivity handling.

MP4060GK-Z (Monolithic Power Systems Inc.): Active product with ROHS3 compliance and MSL-1 rating. Buck-Boost topology without internal switch. Operates on 200VAC–265VAC input range, suitable for standard mains voltage applications. 10-MSOP package offers compact surface-mount footprint. Triac dimming capability specified. Recommended for designs requiring flexible topology and standard mains voltage operation.

All three substitutes maintain active product status, ensuring long-term availability and manufacturing support compared to the obsolete LC5511D.

Frequently Asked Questions (FAQ)

Q: Why is the LC5511D classified as obsolete, and what does this mean for my design?

A: Obsolete status indicates the manufacturer has discontinued production and support. Existing inventory may be limited, and long-term availability cannot be guaranteed. Transitioning to an active substitute part ensures continued supply chain reliability and access to manufacturer technical support.

Q: Can I directly replace the LC5511D with any of these substitutes without circuit modifications?

A: Direct pin-for-pin replacement is not guaranteed due to differences in package type (through-hole vs. surface-mount), internal architecture (internal vs. external switch), and topology (unspecified vs. Flyback, Buck, or Buck-Boost). Circuit redesign may be required. Consult the substitute part datasheet and compare functional block diagrams with the original LC5511D design.

Q: What is the significance of the internal switch parameter in selecting a substitute?

A: The LC5511D and LYT1403D-TL feature integrated internal switches, simplifying circuit design. IRS2982STRPBF and MP4060GK-Z require external switching components, increasing bill-of-materials complexity but offering design flexibility. Selection depends on your circuit architecture and component availability.

Q: How do the different topologies (Flyback, Buck, Buck-Boost) affect substitution compatibility?

A: Topology determines power conversion method and circuit requirements. Flyback (IRS2982STRPBF) uses transformer isolation; Buck (LYT1403D-TL) steps down voltage; Buck-Boost (MP4060GK-Z) provides flexible conversion. The LC5511D topology is unspecified in provided data. Topology selection must align with your power supply design and isolation requirements.

Q: What is the impact of moving from through-hole (8-DIP) to surface-mount packages?

A: Surface-mount packages (8-SOIC, 8-SO, 10-MSOP) require different PCB layout, assembly equipment, and soldering processes compared to through-hole 8-DIP. This affects manufacturing capability, cost, and design timeline. Evaluate your production capabilities before selecting a surface-mount substitute.

Q: Why do some substitutes specify VAC input voltage while the LC5511D specifies DC voltage?

A: LYT1403D-TL and MP4060GK-Z are designed for direct AC mains input (90VAC–308VAC and 200VAC–265VAC respectively), typical for offline LED driver applications. IRS2982STRPBF and the LC5511D operate on lower DC voltage ranges. Application requirements determine which voltage specification is appropriate.

Q: What does MSL-2 rating mean for the IRS2982STRPBF compared to MSL-1 for other parts?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption risk during storage. MSL-1 (unlimited shelf life) is less restrictive than MSL-2 (1-year shelf life). MSL-2 parts require controlled storage conditions and may have shorter usable shelf life. For high-volume or long-term inventory applications, MSL-1 rated parts (LYT1403D-TL, MP4060GK-Z) are preferred.

Q: Are all substitutes RoHS compliant?

A: Yes. LC5511D, LYT1403D-TL maintain RoHS Compliant status. IRS2982STRPBF and MP4060GK-Z are ROHS3 Compliant, representing updated RoHS standards. All substitutes meet current environmental compliance requirements.