MP4021GS-A-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP4021GS-A-Z is an AC DC offline switcher LED driver IC manufactured by Monolithic Power Systems Inc., designed for lighting applications with a single output and flyback topology. The device operates with a supply voltage range of 10.3V to 23V and is housed in an 8-SOIC surface mount package. However, this part carries a "Not For New Designs" product status, making it necessary to identify functionally equivalent alternatives for ongoing production and new design implementations.

Substiute Parts

MP4021GS-A-Z

Monolithic Power Systems Inc.In Stock: 28916MP4021GS-A-Z Datasheet

Current PartRFQ

LNK407EG

Power IntegrationsIn Stock: 17489LNK407EG Datasheet

MFR RecommendedRFQ

NCL30060B2DR2G

Fairchild SemiconductorIn Stock: 4048NCL30060B2DR2G Datasheet

MFR RecommendedRFQ

RT8487GJ6

Richtek USA Inc.In Stock: 35210RT8487GJ6 Datasheet

MFR RecommendedRFQ

TPS92002D

Texas InstrumentsIn Stock: 1364TPS92002D Datasheet

MFR RecommendedRFQ

TPS92314D/NOPB

Texas InstrumentsIn Stock: 1882TPS92314D/NOPB Datasheet

MFR RecommendedRFQ

TPS92314DR/NOPB

Texas InstrumentsIn Stock: 25273TPS92314DR/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MP4021GS-A-Z is based on the following critical parameters: AC DC offline switcher topology, single output configuration, flyback converter design, surface mount packaging, and lighting application suitability. The primary substitution criteria include:

Topology Match: All substitute parts must function as AC DC offline switchers with single output capability for lighting applications.

Supply Voltage Compatibility: Substitute parts must operate within or encompass the 10.3V to 23V supply range of the original part.

Package Compatibility: Surface mount packages with equivalent footprints (8-SOIC or compatible alternatives) are prioritized to minimize PCB redesign.

Compliance & Status: Active product status and RoHS3 compliance are preferred for new designs, given the original part's obsolescence status.

Dimming Capability: While the MP4021GS-A-Z does not include dimming, substitute parts with or without dimming functionality are acceptable, as dimming represents an enhancement rather than a functional requirement.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

TPS92314DR/NOPB and TPS92314D/NOPB from Texas Instruments represent the closest functional equivalents to the MP4021GS-A-Z. Both devices maintain the 8-SOIC package footprint, operate as AC DC offline switcher flyback converters with single output, and carry Active product status with ROHS3 compliance. The supply voltage range of 13V to 35V encompasses the original part's 10.3V to 23V specification with extended upper margin. Operating temperature range of -40°C to 125°C matches the original part exactly. These parts are suitable for direct replacement in new designs.

Secondary Substitutes (Topology Variations)

NCL30060B2DR2G from Fairchild Semiconductor and TPS92002D from Texas Instruments offer dual topology support (Flyback and Step-Down Buck), providing design flexibility for lighting applications. NCL30060B2DR2G operates within 8.8V to 28V, closely matching the original supply range, and maintains 8-SOIC packaging. TPS92002D operates up to 21V maximum supply, fitting within the original specification, though it carries Last Time Buy status. Both support lighting applications with single output configuration.

Alternative Package Options

RT8487GJ6 from Richtek USA Inc. provides AC DC offline switcher functionality in a compact SOT-23-6 package, suitable for space-constrained designs. Supply voltage range of 10V to 30V encompasses the original specification. This part carries Active status and ROHS3 compliance but operates at reduced temperature range (-40°C to 85°C ambient).

LNK407EG from Power Integrations represents a higher-performance alternative with integrated internal switch, extended supply voltage range (36V to 725V), and Triac dimming capability. However, this part uses through-hole eSIP-7C packaging, requiring PCB redesign. It is suitable only for applications where package change is acceptable and dimming functionality is desired.

Compliance & Availability

For new designs, prioritize TPS92314DR/NOPB or TPS92314D/NOPB due to Active product status, ROHS3 compliance, and direct package compatibility. Avoid TPS92002D for new designs due to Last Time Buy status. NCL30060B2DR2G and RT8487GJ6 are acceptable alternatives with Active status when topology flexibility or package miniaturization is required.

Frequently Asked Questions (FAQ)

Q: Can TPS92314DR/NOPB directly replace MP4021GS-A-Z without PCB modifications?

A: Yes. Both parts use identical 8-SOIC packaging with 0.154" width and 3.90mm dimensions. Pin-to-pin compatibility requires verification against specific application schematics, but the package footprint is directly compatible, eliminating PCB redesign requirements.

Q: What is the key difference between TPS92314DR/NOPB and TPS92314D/NOPB?

A: The primary difference is packaging format. TPS92314DR/NOPB is supplied in Tape & Reel (TR) format for automated assembly, while TPS92314D/NOPB is supplied in Tube format for manual handling. Both devices are electrically identical with Active product status and ROHS3 compliance. Selection depends on assembly process requirements.

Q: Why does LNK407EG have a much higher supply voltage range (36V to 725V) compared to MP4021GS-A-Z (10.3V to 23V)?

A: LNK407EG is designed for a broader range of AC DC offline applications, including higher input voltage scenarios. While it can operate at the MP4021GS-A-Z supply range, it is over-specified for this application. The higher voltage rating does not compromise performance at lower voltages but may introduce unnecessary cost and complexity.

Q: Is dimming capability required for substitution?

A: No. The MP4021GS-A-Z does not include dimming functionality. Substitute parts with dimming capability (such as LNK407EG and TPS92002D with Triac dimming) are acceptable alternatives, as dimming represents an optional enhancement. Parts without dimming are equally suitable for direct replacement.

Q: Can RT8487GJ6 be used if operating temperature must reach 125°C?

A: No. RT8487GJ6 operates at -40°C to 85°C ambient temperature, which does not meet the original part's -40°C to 125°C junction temperature specification. For applications requiring 125°C operation, use TPS92314DR/NOPB, TPS92314D/NOPB, or LNK407EG instead.

Q: What is the significance of "Not For New Designs" status on MP4021GS-A-Z?

A: This status indicates the part is obsolete or being phased out by the manufacturer. New designs should not incorporate this part. All recommended substitutes carry Active product status, ensuring long-term availability and manufacturer support for production and field service.

Q: Are all substitute parts RoHS3 compliant?

A: TPS92314DR/NOPB, TPS92314D/NOPB, RT8487GJ6, and TPS92002D are explicitly ROHS3 compliant. LNK407EG is RoHS compliant. NCL30060B2DR2G compliance status is not specified in available data. Verify compliance documentation with the supplier for NCL30060B2DR2G if RoHS3 certification is a design requirement.

Q: Which substitute part has the best inventory availability?

A: RT8487GJ6 has the highest inventory level at 35,200 pieces. TPS92314DR/NOPB follows with 25,200 pieces. LNK407EG has 17,400 pieces. TPS92314D/NOPB has 1,861 pieces. NCL30060B2DR2G has 3,963 pieces. TPS92002D has the lowest availability at 1,288 pieces. For production planning, prioritize parts with higher inventory levels.