RT8413GS LED Driver IC Equivalent & Substitute Parts

Part Overview

The RT8413GS is an AC DC offline switcher LED driver IC manufactured by Richtek USA Inc., designed for lighting applications with Triac dimming capability. This device features a step-down (buck) topology with internal switching, operating from 10V to 30V supply voltage and delivering 3mA output current. The RT8413GS is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility in AC DC offline switching applications while supporting Triac-based dimming control.

Substiute Parts

RT8413GS

Richtek USA Inc.In Stock: 25116RT8413GS Datasheet

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AL9901FDF-13

Diodes IncorporatedIn Stock: 8972AL9901FDF-13 Datasheet

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LM3497MX/NOPB

Texas InstrumentsIn Stock: 98909LM3497MX/NOPB Datasheet

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MP4032-2GS-Z

Monolithic Power Systems Inc.In Stock: 35483MP4032-2GS-Z Datasheet

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MP4088GJ-P

Monolithic Power Systems Inc.In Stock: 1126MP4088GJ-P Datasheet

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MXHV9910BETR

LittelfuseIn Stock: 5627MXHV9910BETR Datasheet

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NCL30030B2DR2G

onsemiIn Stock: 5129NCL30030B2DR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT8413GS are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Type: AC DC Offline Switcher
• Topology: Step-Down (Buck) or compatible topologies (Buck-Boost)
• Number of Outputs: 1
• Dimming Method: Triac (primary) or Analog/PWM (secondary, with application verification)
• Supply Voltage Range: Overlap with 10V-30V minimum requirement
• Internal Switch(s): Yes (preferred for direct replacement)
• Applications: Lighting or Signage
• RoHS Compliance: ROHS3 Compliant

Grouping Logic: Parts are grouped into two categories based on dimming compatibility and supply voltage characteristics. Group 1 comprises Triac-dimming parts with supply voltage ranges overlapping the RT8413GS specification, ensuring direct functional replacement in existing Triac dimming circuits. Group 2 includes parts with alternative dimming methods (PWM, Analog) or different topologies, suitable for applications where dimming method flexibility exists or where supply voltage requirements differ.

Parameter Comparison

Engineering Selection Recommendations

Group 1: Direct Triac Dimming Substitutes (Preferred)

LM3497MX/NOPB (Texas Instruments) and MP4032-2GS-Z (Monolithic Power Systems Inc.) are active products with Triac dimming capability matching the RT8413GS functional requirement. Both are ROHS3 compliant with MSL ratings of 1 (Unlimited), providing superior moisture handling compared to the obsolete RT8413GS (MSL 3). LM3497MX/NOPB operates within 8V-12V supply range, requiring verification for 10V-30V applications. MP4032-2GS-Z covers 10.3V-27V supply range, providing closer alignment with RT8413GS specifications. MP4032-2GS-Z includes internal switching and supports both buck and boost topologies, offering design flexibility.

MP4088GJ-P (Monolithic Power Systems Inc.) provides Triac dimming in a compact SOT-23-5 package with 4.5V-5V supply range. This part is suitable only for applications operating within its narrower supply voltage window and requires PCB layout redesign due to package change from 8-SOIC.

Group 2: Alternative Dimming Method Substitutes

MXHV9910BETR (Littelfuse) and AL9901FDF-13 (Diodes Incorporated) employ PWM or Analog/PWM dimming instead of Triac control. MXHV9910BETR operates 8V-450V with PWM dimming at 64kHz, suitable for signage applications. AL9901FDF-13 operates 15V-500V with Analog/PWM dimming at 300kHz, supporting backlight, lighting, and signage applications. These parts require circuit redesign to accommodate alternative dimming methods and are not direct pin-compatible replacements.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the RT8413GS regulatory requirements. Active product status ensures long-term availability and supply chain stability compared to the obsolete RT8413GS.

Frequently Asked Questions (FAQ)

Q: Can LM3497MX/NOPB directly replace RT8413GS in existing designs?

A: LM3497MX/NOPB shares Triac dimming functionality and 8-SOIC packaging with RT8413GS. However, the supply voltage range (8V-12V) is narrower than RT8413GS (10V-30V). Direct replacement is possible only if your application operates within the 8V-12V window. The part lacks internal switching (No vs. Yes), requiring external switching components in the circuit design.

Q: What is the primary difference between MP4032-2GS-Z and MP4088GJ-P?

A: MP4032-2GS-Z operates 10.3V-27V in 8-SOIC packaging, closely matching RT8413GS supply voltage range. MP4088GJ-P operates 4.5V-5V in compact SOT-23-5 packaging. MP4032-2GS-Z is suitable for direct replacement in standard voltage applications, while MP4088GJ-P requires redesign for low-voltage applications and involves PCB layout changes due to package difference.

Q: Why are MXHV9910BETR and AL9901FDF-13 listed as substitutes if they use different dimming methods?

A: These parts are listed as functional alternatives for applications where dimming method flexibility exists or where circuit redesign is acceptable. MXHV9910BETR uses PWM dimming at 64kHz, while AL9901FDF-13 uses Analog/PWM dimming at 300kHz. Both maintain AC DC offline switcher topology and lighting-related applications. Selection depends on whether your design can accommodate PWM-based dimming control instead of Triac control.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. RT8413GS has MSL 3 (168 hours), while most substitutes have MSL 1 (Unlimited). Higher MSL ratings provide greater handling flexibility during manufacturing and storage, reducing risk of moisture-induced failures.

Q: Is package compatibility important when selecting a substitute?

A: Package compatibility is critical for direct PCB replacement. RT8413GS uses 8-SOIC (0.154", 3.90mm Width). LM3497MX/NOPB uses 14-SOIC (0.295", 7.50mm Width), requiring PCB redesign. MP4032-2GS-Z uses 8-SOIC with 7 leads (vs. standard 8), requiring pin verification. MP4088GJ-P uses SOT-23-5, requiring complete PCB layout redesign. MXHV9910BETR and AL9901FDF-13 use different packages (8-SOIC-EP and 12-UDFN respectively), also requiring layout changes.

Q: Which substitute offers the best supply voltage compatibility with RT8413GS?

A: MP4032-2GS-Z (10.3V-27V) provides the closest supply voltage range overlap with RT8413GS (10V-30V). This part covers the critical 10V-27V window where both devices operate, making it the most suitable for applications requiring minimal circuit modification within standard voltage ranges.