RT8497BGS LED Driver IC Equivalent & Substitute Parts

Part Overview

The RT8497BGS is an AC DC offline switcher LED driver IC manufactured by Richtek USA Inc., designed for lighting applications with a 1.4A output capability and step-down (buck) topology. This component operates across a 10V to 30V supply range and is housed in an 8-SOP package. The RT8497BGS is classified as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Substiute Parts

RT8497BGS

Richtek USA Inc.In Stock: 2081RT8497BGS Datasheet

Current PartRFQ

RT8497AGS

Richtek USA Inc.In Stock: 25338RT8497AGS Datasheet

Parametric EquivalentRFQ

RT8497GS

Richtek USA Inc.In Stock: 5118RT8497GS Datasheet

Parametric EquivalentRFQ

LYT0004D-TL

Power IntegrationsIn Stock: 14974LYT0004D-TL Datasheet

SimilarRFQ

LYT3315D-TL

Power IntegrationsIn Stock: 1056LYT3315D-TL Datasheet

SimilarRFQ

MP4050AGJ-P

Monolithic Power Systems Inc.In Stock: 787MP4050AGJ-P Datasheet

SimilarRFQ

MP4088GJ-Z

Monolithic Power Systems Inc.In Stock: 1173MP4088GJ-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT8497BGS are categorized based on strict electrical and mechanical parameter alignment:

Parametric Equivalents share identical or functionally equivalent specifications across all critical parameters: supply voltage range (10V–30V), output current (1.4A), topology (step-down buck), package format (8-SOP), operating temperature range (-40°C to 85°C), and application domain (lighting). These parts are direct functional replacements.

Similar Parts maintain the same functional category (AC DC offline switcher LED driver) and application (lighting) but differ in one or more critical parameters such as supply voltage range, output current rating, topology variants, package type, or operating temperature range. These require design verification before substitution.

The following key parameters determine substitution eligibility:

• Supply voltage range compatibility (10V–30V minimum requirement)
• Output current capability (1.4A minimum)
• Topology classification (step-down buck preferred)
• Package format (8-SOP preferred for direct PCB compatibility)
• Operating temperature range (-40°C to 85°C minimum)
• RoHS and MSL compliance status

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

RT8497AGS and RT8497GS are parametric equivalents to the RT8497BGS. Both maintain identical electrical specifications (10V–30V supply, 1.4A output, step-down buck topology) and package format (8-SOP). Both are classified as obsolete but remain ROHS3 compliant with MSL 3 ratings. RT8497AGS offers higher inventory availability (25,300 pcs) compared to RT8497GS (5,026 pcs), making it the preferred parametric equivalent for procurement continuity.

Similar Parts (Design Verification Required):

LYT0004D-TL (Power Integrations) is an active product with extended operating temperature range (-40°C to 125°C) and superior MSL rating (1, unlimited). However, it operates on 85VAC–308VAC input, features multiple topology options (Flyback, SEPIC, Buck, Boost), and delivers only 225mA output current, making it unsuitable for direct substitution in 10V–30V DC applications requiring 1.4A.

LYT3315D-TL (Power Integrations) is an active product with the highest operating temperature range (-40°C to 150°C) and MSL 3 rating. It supports multiple topologies and TRIAC dimming but operates on 85VAC–132VAC input and uses a 16-SOIC package (14 leads), incompatible with the 8-SOP footprint and DC supply requirements.

MP4050AGJ-P (Monolithic Power Systems Inc.) is an active automotive-grade product with MSL 1 rating and extended temperature range (-40°C to 125°C). However, it operates on 4.1V–5V supply, incompatible with the 10V–30V requirement, and uses a TSOT-23-5 package, requiring PCB redesign.

MP4088GJ-Z (Monolithic Power Systems Inc.) is an active product with MSL 1 rating and TRIAC dimming support. It operates on 4.5V–5V supply with Buck/Boost topology, making it unsuitable for 10V–30V DC applications and requiring package redesign.

Frequently Asked Questions (FAQ)

Q: Can RT8497AGS or RT8497GS be used as direct replacements for RT8497BGS?

A: Yes. RT8497AGS and RT8497GS are parametric equivalents with identical supply voltage (10V–30V), output current (1.4A), topology (step-down buck), and package format (8-SOP). Both are ROHS3 compliant with MSL 3 ratings. No design changes are required for PCB layout or schematic integration.

Q: Why are LYT0004D-TL and LYT3315D-TL listed as similar rather than equivalent?

A: These Power Integrations parts operate on AC mains input (85VAC–308VAC or 85VAC–132VAC) rather than the 10V–30V DC supply required by RT8497BGS. Additionally, LYT0004D-TL delivers only 225mA output current versus the required 1.4A, and LYT3315D-TL uses a 16-SOIC package incompatible with the 8-SOP footprint. These differences require complete circuit redesign and are not suitable for direct substitution.

Q: Can MP4050AGJ-P or MP4088GJ-Z replace RT8497BGS?

A: No. Both Monolithic Power Systems parts operate on 4.1V–5V or 4.5V–5V supply ranges, incompatible with the 10V–30V requirement. Both use TSOT-23-5 packages instead of 8-SOP, requiring PCB redesign. These parts serve different application domains and cannot function as substitutes without extensive circuit modification.

Q: What is the impact of product status (obsolete vs. active) on substitution?

A: RT8497BGS, RT8497AGS, and RT8497GS are all classified as obsolete, indicating discontinued manufacturing. Active alternatives (LYT0004D-TL, LYT3315D-TL, MP4050AGJ-P, MP4088GJ-Z) offer longer-term availability but require design verification due to parameter differences. For immediate replacement in existing designs, parametric equivalents (RT8497AGS or RT8497GS) are preferred despite obsolete status.

Q: How do MSL ratings affect component selection?

A: RT8497BGS, RT8497AGS, and RT8497GS all carry MSL 3 ratings (168-hour floor life), requiring controlled storage and handling. Active alternatives LYT0004D-TL, MP4050AGJ-P, and MP4088GJ-Z offer MSL 1 ratings (unlimited floor life), reducing moisture-related risk during storage and assembly. MSL 3 components require more stringent moisture control but do not affect electrical performance or substitution eligibility.

Q: Are there package compatibility considerations for substitution?

A: Yes. RT8497BGS uses an 8-SOP package (8-SOIC, 0.154" width). Parametric equivalents RT8497AGS and RT8497GS use identical 8-SOP packages, enabling direct PCB placement without layout changes. Similar parts LYT3315D-TL (16-SOIC, 14 leads) and MP4050AGJ-P/MP4088GJ-Z (TSOT-23-5) require different footprints and cannot be used as drop-in replacements.