LC5548LD LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5548LD 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 operates with a maximum supply voltage of 20V and includes an internal switch for offline switching topologies. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production alternatives.

Substiute Parts

LC5548LD

Sanken Electric USA Inc.In Stock: 744LC5548LD Datasheet

Current PartRFQ

AL9910AS-13

Diodes IncorporatedIn Stock: 1258AL9910AS-13 Datasheet

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HV9931LG-G

Microchip TechnologyIn Stock: 8606HV9931LG-G Datasheet

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LYT1404D-TL

Power IntegrationsIn Stock: 1135LYT1404D-TL Datasheet

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MP4001DS-LF

Monolithic Power Systems Inc.In Stock: 1073MP4001DS-LF Datasheet

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MP4050AGJ-Z

Monolithic Power Systems Inc.In Stock: 745MP4050AGJ-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LC5548LD is determined by the following critical parameters:

• Functional Type: AC DC offline switcher LED driver with single output
• Internal Switch Requirement: Presence of integrated power switch
• Supply Voltage Compatibility: Maximum supply voltage rating
• Package Compatibility: Physical form factor and mounting method
• Operating Temperature Range: Thermal performance envelope
• Product Status: Active alternatives preferred for obsolete components
• Compliance: RoHS and REACH certifications

The substitute parts listed below maintain functional equivalence as AC DC offline switcher LED drivers. However, substitutes vary in topology (buck, boost configurations), mounting type (surface mount vs. through-hole), package form factor, and supply voltage ratings. Selection depends on specific application requirements and PCB design constraints.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs: The LC5548LD operates in through-hole 8-DIP packaging. No substitute parts maintain this exact form factor. Designs requiring through-hole mounting must either source remaining LC5548LD inventory or undergo PCB redesign to accommodate surface-mount alternatives.

For Surface-Mount Redesigns: Active substitute parts are available across multiple manufacturers:

• MP4050AGJ-Z (Monolithic Power Systems Inc.): Active product with internal switch, automotive-grade, ROHS3 compliant. Limited to 5V maximum supply voltage; suitable for low-voltage applications.

• LYT1404D-TL (Power Integrations): Active product with internal switch, RoHS compliant, REACH unaffected. Operates at 90VAC to 308VAC input; designed for direct AC line applications.

• AL9910AS-13 (Diodes Incorporated): Active product, ROHS3 compliant, REACH unaffected. Supports 20V to 500V supply range with flexible buck-boost topology.

• HV9931LG-G (Microchip Technology): Active product, ROHS3 compliant, REACH unaffected. Supports 8V to 450V supply range with PWM dimming capability.

• MP4001DS-LF (Monolithic Power Systems Inc.): Active product, automotive-grade, ROHS3 compliant, REACH unaffected. Supports 12V to 450V supply range with PWM dimming.

All substitute parts carry active product status, ensuring long-term availability and manufacturer support. Selection should prioritize supply voltage compatibility with target application requirements and package form factor feasibility within PCB constraints.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LC5548LD with any of these substitute parts?

A: Direct replacement depends on PCB design. The LC5548LD uses 8-DIP through-hole packaging. All listed substitutes use surface-mount packages (SOT-23-5 or 8-SOIC). PCB redesign is required for any surface-mount substitute. Electrical compatibility must be verified against specific application supply voltage and topology requirements.

Q: What is the key difference between parts with and without internal switches?

A: LC5548LD, MP4050AGJ-Z, and LYT1404D-TL include integrated power switches. AL9910AS-13, HV9931LG-G, and MP4001DS-LF do not. Internal switches simplify circuit design by reducing external component count. External switch designs offer greater flexibility in topology selection but require additional discrete components.

Q: Which substitute supports the widest supply voltage range?

A: AL9910AS-13 supports 20V to 500V, and HV9931LG-G supports 8V to 450V. Both offer broad voltage compatibility for diverse application requirements. MP4050AGJ-Z is limited to 4.1V to 5V for low-voltage applications.

Q: Are all substitutes RoHS compliant?

A: Yes. LC5548LD is RoHS Compliant. All substitute parts carry either RoHS Compliant or ROHS3 Compliant status, meeting environmental and regulatory requirements.

Q: What is the operating temperature difference between LC5548LD and substitutes?

A: LC5548LD operates -55°C to 125°C (TA). Most substitutes operate -40°C to 125°C (TJ) or -40°C to 85°C (TA). Applications requiring extended low-temperature operation below -40°C should verify LC5548LD inventory availability or confirm substitute thermal specifications against design requirements.

Q: Which substitutes are automotive-grade?

A: MP4050AGJ-Z and MP4001DS-LF carry automotive-grade designation. These parts meet automotive qualification standards and are suitable for automotive lighting applications.

Q: What packaging options are available for surface-mount designs?

A: SOT-23-5 (MP4050AGJ-Z) and 8-SOIC (AL9910AS-13, HV9931LG-G, MP4001DS-LF) are available. SOT-23-5 offers minimal footprint for space-constrained designs. 8-SOIC provides standard SOIC pin spacing and thermal characteristics.