MSL2024-INR LED Driver IC Equivalent & Substitute Parts

Part Overview

The MSL2024-INR is an AC DC offline switcher LED driver IC manufactured by Microchip Technology, designed for lighting applications with PWM dimming capability. This 24-VQFN packaged component features a 2-output configuration with Flyback and Step-Down (Buck) topology. The part is currently obsolete, making identification of functional equivalents and substitutes essential for ongoing design support, legacy system maintenance, and component procurement planning.

Substiute Parts

MSL2024-INR

Microchip TechnologyIn Stock: 987MSL2024-INR Datasheet

Current PartRFQ

MSL2021-INR

Microchip TechnologyIn Stock: 774MSL2021-INR Datasheet

Parametric EquivalentRFQ

LM3445MM/NOPB

Texas InstrumentsIn Stock: 21141LM3445MM/NOPB Datasheet

MFR RecommendedRFQ

LYT3325D-TL

Power IntegrationsIn Stock: 17586LYT3325D-TL Datasheet

MFR RecommendedRFQ

NCL30186BDR2G

onsemiIn Stock: 37866NCL30186BDR2G Datasheet

MFR RecommendedRFQ

TPS92001DR

Texas InstrumentsIn Stock: 878TPS92001DR Datasheet

MFR RecommendedRFQ

TPS92075D/NOPB

Texas InstrumentsIn Stock: 1183TPS92075D/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSL2024-INR requires matching on the following critical parameters:

Primary Matching Criteria:

• AC DC Offline Switcher topology for lighting applications
• PWM or Triac dimming capability
• Surface mount packaging suitable for LED driver circuits
• Operating temperature range compatibility (-40°C minimum)
• RoHS3 compliance and MSL rating for manufacturing compatibility

Secondary Considerations:

• Number of outputs (2 outputs in main part; 1 output in most substitutes reflects design flexibility)
• Supply voltage range (9.5V–15V in main part; substitutes range from 8V–25.5V)
• Package form factor (24-VQFN primary; alternatives in 10-VSSOP, 16-SO, 10-SOIC, 8-SOIC)

Substitutes are grouped into two categories: parametric equivalents (same manufacturer, similar specifications) and manufacturer-recommended alternatives (different manufacturers, active product status).

Parameter Comparison

Engineering Selection Recommendations

MSL2021-INR (Parametric Equivalent) MSL2021-INR is the closest parametric equivalent to MSL2024-INR, sharing identical electrical specifications, topology, output count, and package form factor. Both parts are obsolete Microchip products with ROHS3 compliance and MSL-1 ratings. Selection of MSL2021-INR requires no circuit redesign and maintains full compatibility with existing PCB layouts and firmware implementations.

LM3445MM/NOPB (Texas Instruments, Active Status) LM3445MM/NOPB is an active Texas Instruments product suitable for designs requiring single-output AC DC offline switching with Triac dimming. The part operates within a narrower supply voltage range (8V–12V) compared to MSL2024-INR and uses a smaller 10-VSSOP package. ROHS3 compliance and MSL-1 rating ensure manufacturing compatibility. This option is recommended for new designs or legacy system updates where active product support is required.

LYT3325D-TL (Power Integrations, Active Status) LYT3325D-TL is an active Power Integrations LYTSwitch-3 series device offering extended topology flexibility (Flyback, Buck, Boost) and higher operating temperature range (-40°C to 150°C). The part operates on AC mains input (85VAC–132VAC) rather than DC supply, making it suitable for direct AC line-powered applications. MSL-3 rating requires controlled moisture exposure during manufacturing. This option is recommended for designs requiring higher temperature performance or direct AC input capability.

NCL30186BDR2G (onsemi, Active Status) NCL30186BDR2G is an active onsemi product supporting multiple topologies (Flyback, SEPIC, Buck, Boost) with both Analog and PWM dimming methods. The part accommodates a wide supply voltage range (8.8V–25.5V) and operates to 125°C. ROHS3 compliance and MSL-1 rating provide manufacturing compatibility. This option is recommended for designs requiring flexible topology support and extended supply voltage tolerance.

TPS92001DR (Texas Instruments, Last Time Buy) TPS92001DR is a Texas Instruments product in Last Time Buy status, indicating limited future availability. The part supports Flyback and Buck topologies with Triac dimming in an 8-SOIC package. Supply voltage maximum of 21V and 5V output specification indicate application-specific design. ROHS3 compliance and MSL-1 rating are maintained. This option is suitable only for legacy system maintenance where existing inventory is available.

TPS92075D/NOPB (Texas Instruments, Active Status) TPS92075D/NOPB is an active Texas Instruments product supporting Buck and Boost topologies with Triac dimming. The part operates within a mid-range supply voltage window (11V–18V) and maintains ROHS3 compliance with MSL-1 rating. The 8-SOIC package provides compact form factor. This option is recommended for designs requiring flexible Buck-Boost operation within the specified voltage range.

Frequently Asked Questions (FAQ)

Q: Can MSL2021-INR be used as a direct replacement for MSL2024-INR? A: Yes. MSL2021-INR shares identical electrical specifications, topology, output configuration, package form factor (24-VQFN), and operating temperature range with MSL2024-INR. No circuit modifications are required. Both parts are obsolete Microchip products with ROHS3 compliance and MSL-1 ratings.

Q: Why do most substitute parts have only 1 output instead of 2? A: The MSL2024-INR's 2-output configuration is specific to its design. Most active substitute parts are designed for single-output applications. Circuit redesign may be necessary if dual-output functionality is required in the application.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating difference between MSL2024-INR and LYT3325D-TL? A: MSL2024-INR has MSL-1 (Unlimited moisture exposure tolerance), while LYT3325D-TL has MSL-3 (168-hour moisture exposure limit). MSL-3 parts require controlled storage and handling during manufacturing to prevent moisture absorption. This affects supply chain logistics and manufacturing process requirements.

Q: Can I use a Triac dimming part to replace a PWM dimming part? A: Triac and PWM are different dimming control methods. Triac dimming responds to phase-cut AC signals, while PWM dimming responds to pulse-width modulated signals. Direct substitution requires circuit-level compatibility verification. NCL30186BDR2G supports both Analog and PWM dimming, providing flexibility for PWM-based designs.

Q: Which substitute part is recommended for new designs? A: For new designs requiring active product support, LM3445MM/NOPB, LYT3325D-TL, NCL30186BDR2G, or TPS92075D/NOPB are recommended based on specific topology, voltage range, and dimming method requirements. All are active products with ROHS3 compliance.

Q: What is the difference between AC and DC supply voltage specifications? A: MSL2024-INR, MSL2021-INR, and most substitutes specify DC supply voltage (9.5V–15V or similar). LYT3325D-TL specifies AC mains input (85VAC–132VAC), indicating direct AC line connection capability. Application requirements determine which voltage specification is appropriate.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts maintain RoHS compliance (ROHS3 or RoHS Compliant status). This ensures environmental and regulatory compatibility with modern manufacturing and end-market requirements.