LC5545LD LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5545LD is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., designed for single-output lighting applications. This through-hole 8-DIP package component operates across a supply voltage range up to 20V and is rated for -55°C to 125°C operating temperature. The part is currently active in production and RoHS compliant.

Substitute parts are necessary when the LC5545LD reaches end-of-life status, when through-hole packaging is not compatible with target PCB designs, or when alternative topologies better suit specific application requirements.

Substiute Parts

LC5545LD

Sanken Electric USA Inc.In Stock: 878LC5545LD Datasheet

Current PartRFQ

MP4027GJ-Z

Monolithic Power Systems Inc.In Stock: 36443MP4027GJ-Z Datasheet

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MP4031GS-Z

Monolithic Power SystemsIn Stock: 20248MP4031GS-Z Datasheet

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RT8497AGS

Richtek USA Inc.In Stock: 25338RT8497AGS Datasheet

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UCC28811D

Texas InstrumentsIn Stock: 3480UCC28811D Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LC5545LD is determined by the following core parameters:

• Type: All substitutes must be AC DC offline switcher LED driver ICs with single output
• Supply Voltage Compatibility: Maximum supply voltage must accommodate the application's input range; the LC5545LD supports up to 20V
• Internal Switch Requirement: The LC5545LD contains an internal switch; substitutes with or without internal switches are functionally equivalent if topology and output characteristics remain compatible
• Mounting and Package: Through-hole 8-DIP is the primary package; surface-mount alternatives (TSOT-23-8, 8-SOIC, 8-SOP) are acceptable substitutes when PCB layout permits
• Operating Temperature Range: Substitutes must support the application's thermal requirements; the LC5545LD operates -55°C to 125°C
• Compliance: RoHS and REACH compliance status must meet regulatory requirements

The four substitute parts listed (MP4027GJ-Z, MP4031GS-Z, RT8497AGS, UCC28811D) meet these core substitution criteria as single-output AC DC offline switcher LED drivers.

Parameter Comparison

Engineering Selection Recommendations

MP4027GJ-Z (Monolithic Power Systems Inc.) is an active product with ROHS3 compliance and extended maximum supply voltage (28V). This part operates at higher junction temperature (125°C TJ) and uses surface-mount TSOT-23-8 packaging. Suitable for applications where PCB space is constrained and higher supply voltage tolerance is required.

MP4031GS-Z (Monolithic Power Systems) is an active product with ROHS3 compliance and maximum supply voltage of 27V. This part operates at 125°C TJ and uses 8-SOIC surface-mount packaging. Suitable for applications requiring analog or TRIAC dimming capability and surface-mount integration.

RT8497AGS (Richtek USA Inc.) is an obsolete product with ROHS3 compliance. While still in inventory, this part has reached end-of-life status and should not be selected for new designs. Operating temperature is limited to 85°C TA, which is lower than the LC5545LD. Use only for legacy system maintenance or repair.

UCC28811D (Texas Instruments) is an active product with ROHS3 compliance and maximum supply voltage of 18V. This part operates at 105°C TA and uses 8-SOIC surface-mount packaging. Suitable for applications with lower supply voltage requirements and where Texas Instruments component qualification is mandated.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LC5545LD with any of these parts directly without circuit modification?

A: Direct substitution depends on package compatibility and circuit topology. The LC5545LD uses through-hole 8-DIP packaging; all listed substitutes use surface-mount packages (TSOT-23-8 or 8-SOIC). PCB layout redesign is required. Pin configuration and functional behavior must be verified against application schematics.

Q: What is the key difference between MP4027GJ-Z and MP4031GS-Z?

A: Both are Monolithic Power Systems products with similar supply voltage ranges (28V and 27V respectively). MP4027GJ-Z uses TSOT-23-8 packaging (smaller footprint), while MP4031GS-Z uses 8-SOIC packaging. MP4031GS-Z supports analog and TRIAC dimming; MP4027GJ-Z supports PWM dimming.

Q: Why is RT8497AGS marked as obsolete?

A: RT8497AGS has reached end-of-life status with Richtek USA Inc. Although inventory remains available, this part should not be selected for new product designs. Use only for repair or maintenance of existing systems.

Q: Does operating temperature range affect substitution suitability?

A: Yes. The LC5545LD operates -55°C to 125°C. RT8497AGS is limited to -40°C to 85°C, which may not meet applications requiring the full -55°C lower temperature or sustained 125°C operation. Verify application thermal requirements before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes carry ROHS3 compliance certification, meeting current regulatory requirements equivalent to the LC5545LD's RoHS compliance status.