MP4050GS LED Driver IC - Equivalent & Substitute Parts

Part Overview

The MP4050GS is an AC DC offline switcher LED driver IC manufactured by Monolithic Power Systems Inc., designed for lighting applications. This surface mount component operates across a wide input voltage range of 85VAC to 265VAC and features a step-down (buck) topology with internal switching capability. The part is currently in active production status with 1,228 units in stock.

Substitute parts become necessary when the MP4050GS experiences supply constraints, extended lead times, or when design requirements necessitate alternative package configurations or enhanced electrical specifications. The three qualified substitutes listed below maintain functional equivalence for offline LED driver applications while offering variations in packaging, topology flexibility, and output current ratings.

Substiute Parts

MP4050GS

Monolithic Power Systems Inc.In Stock: 1336MP4050GS Datasheet

Current PartRFQ

HV9923N3-G

Microchip TechnologyIn Stock: 1649HV9923N3-G Datasheet

MFR RecommendedRFQ

TS19730CX6 RFG

Taiwan Semiconductor CorporationIn Stock: 44327TS19730CX6 RFG Datasheet

MFR RecommendedRFQ

UCC28810DR

Texas InstrumentsIn Stock: 3636UCC28810DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP4050GS is determined by the following critical parameters:

• Application Category: All substitutes must function as AC DC offline switcher LED driver ICs for lighting applications
• Topology Compatibility: Primary topology must include step-down (buck) capability; additional topologies (boost, flyback, SEPIC) are acceptable as supplementary features
• Internal Switching: All candidates must include integrated switching capability
• Single Output Configuration: All parts must provide one output channel
• RoHS3 Compliance: All substitutes must maintain ROHS3 compliance status
• Package Compatibility: Surface mount packages (8-SOIC, SOT-23-6) are preferred for direct PCB layout compatibility; through-hole alternatives (TO-92-3) require circuit board redesign

The three qualified substitutes meet these criteria with variations in supply voltage ranges, output current ratings, dimming methodologies, and package form factors.

Parameter Comparison

Engineering Selection Recommendations

HV9923N3-G (Microchip Technology)

This substitute is suitable for applications requiring triac dimming capability and higher supply voltage tolerance (20V to 400V). The part maintains active production status and offers superior moisture sensitivity characteristics (MSL 1). However, the through-hole TO-92-3 package requires PCB redesign compared to the surface mount MP4050GS. The 30mA output current rating is appropriate for low-power LED driver applications. Operating temperature range is limited to -40°C to 85°C, which may be restrictive for high-temperature environments.

TS19730CX6 RFG (Taiwan Semiconductor Corporation)

This substitute provides dual topology support (buck and boost) and operates across a lower voltage range (8V to 33V). The part is currently in obsolete status, making it unsuitable for new designs or long-term supply chain planning. The SOT-23-6 surface mount package offers direct PCB compatibility. MSL rating of 3 requires careful moisture control during storage and assembly. This option should be avoided for production designs requiring sustained component availability.

UCC28810DR (Texas Instruments)

This substitute offers the highest output current capability (750mA) and the most flexible topology support (flyback, SEPIC, buck, and boost). The part maintains active production status with unlimited moisture sensitivity rating (MSL 1). The 8-SOIC package provides direct pin-compatible replacement capability with the MP4050GS. Operating temperature range extends to 105°C, suitable for elevated ambient conditions. Supply voltage specification is incomplete (maximum 18V only), requiring detailed datasheet review for minimum voltage requirements. Triac dimming support is included.

Frequently Asked Questions (FAQ)

Q: Can the HV9923N3-G replace the MP4050GS in existing PCB layouts?

A: Direct PCB replacement is not possible. The HV9923N3-G uses a through-hole TO-92-3 package, while the MP4050GS is a surface mount 8-SOIC component. Circuit board redesign is required to accommodate the different package footprint and pin configuration.

Q: Why is the TS19730CX6 RFG listed as obsolete?

A: The TS19730CX6 RFG has reached end-of-life status and is no longer in active production. While inventory remains available (44,300 units), this part should not be selected for new designs due to uncertain long-term supply availability and lack of manufacturer support.

Q: What is the primary advantage of the UCC28810DR?

A: The UCC28810DR provides the highest output current rating (750mA) among the three substitutes and maintains an 8-SOIC package compatible with MP4050GS PCB layouts. It also offers the most comprehensive topology flexibility (flyback, SEPIC, buck, and boost) for diverse application requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. The MP4050GS, HV9923N3-G, TS19730CX6 RFG, and UCC28810DR all maintain ROHS3 compliance status, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What does MSL rating indicate for component handling?

A: Moisture Sensitivity Level (MSL) specifies the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. MSL 1 (unlimited) offers the most flexibility, while MSL 3 (168 hours) requires careful moisture control and may necessitate baking before assembly.

Q: Which substitute is best for high-temperature applications?

A: The UCC28810DR supports the highest operating temperature range (-40°C to 105°C), followed by the MP4050GS (-40°C to 125°C junction temperature). The HV9923N3-G and TS19730CX6 RFG are limited to -40°C to 85°C ambient temperature operation.

Q: Do all substitutes support dimming functionality?

A: The HV9923N3-G and UCC28810DR both include triac dimming capability. The MP4050GS and TS19730CX6 RFG do not specify dimming features in their provided parameters.