MP4068GN-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP4068GN-Z is an AC DC offline switcher LED driver IC manufactured by Monolithic Power Systems Inc., designed for lighting applications. This single-output device operates with a 4.1V to 5V supply range and delivers 160mA output current at 22kHz switching frequency with Triac dimming capability. The part is currently in active production status and RoHS3 compliant.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or application-specific parameter needs while maintaining functional equivalence in LED driver topology and dimming control.

Substiute Parts

MP4068GN-Z

Monolithic Power Systems Inc.In Stock: 83156MP4068GN-Z Datasheet

Current PartRFQ

AL9910S-13

Diodes IncorporatedIn Stock: 13831AL9910S-13 Datasheet

MFR RecommendedRFQ

RT7304GE

Richtek USA Inc.In Stock: 23510RT7304GE Datasheet

MFR RecommendedRFQ

RT8415GSP

Richtek USA Inc.In Stock: 6883RT8415GSP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP4068GN-Z is determined by the following critical parameters:

• AC DC offline switcher topology with single output configuration
• Step-Down (Buck) and Step-Up (Boost) capability
• Supply voltage range compatibility (minimum 4.1V to 5V nominal operation)
• Output voltage capability (50V or higher)
• Current delivery capacity (160mA or greater per channel)
• Dimming control method (Triac or compatible PWM/Analog dimming)
• Surface mount packaging in 8-pin SOIC or equivalent footprint
• RoHS3 compliance and REACH unaffected status
• Active or recently active product status

The three identified substitute parts meet these core functional requirements while accommodating variations in supply voltage ranges, frequency specifications, and dimming implementation methods.

Parameter Comparison

Engineering Selection Recommendations

AL9910S-13 (Diodes Incorporated): This part maintains active product status and offers the widest supply voltage range (15V to 500V), making it suitable for applications requiring extended input voltage tolerance. The 8-SOIC package footprint is directly compatible with MP4068GN-Z PCB layouts. Dimming capability includes both Analog and PWM methods, providing flexibility beyond Triac control. MSL rating of 1 (Unlimited) indicates superior moisture resistance compared to the main part. Recommended for new designs requiring long-term supply security.

RT7304GE (Richtek USA Inc.): This part is active and offers the highest operating temperature range (-40°C to 125°C junction temperature), suitable for thermal-demanding applications. The SOT-23-6 package requires PCB layout modification and is not pin-compatible with the 8-SOIC footprint. Topology includes Flyback capability in addition to Buck and Boost configurations. Recommended only when thermal performance is critical and PCB redesign is feasible.

RT8415GSP (Richtek USA Inc.): This part carries obsolete product status, indicating discontinued manufacturing and potential long-term supply unavailability. Supply voltage range (4.5V to 36V) overlaps with MP4068GN-Z nominal operation. The 8-SOIC package with exposed pad is footprint-compatible. Automotive-grade qualification is available. Not recommended for new designs due to obsolescence; suitable only for legacy system maintenance with existing inventory.

Frequently Asked Questions (FAQ)

Q: Can AL9910S-13 directly replace MP4068GN-Z on existing PCBs?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) package footprint. Pin-to-pin compatibility requires verification against detailed datasheets, but package dimensions are identical. The exposed pad variant of MP4068GN-Z matches standard 8-SOIC pinout conventions.

Q: What is the primary difference in dimming control between these parts?

A: MP4068GN-Z uses Triac dimming, which is phase-cut dimming suitable for AC line-voltage control. AL9910S-13 supports Analog and PWM dimming methods, which are DC-based control techniques. RT7304GE and RT8415GSP do not specify dimming method in provided parameters. Application requirements determine which dimming method is appropriate.

Q: Why does RT7304GE use a different package (SOT-23-6)?

A: SOT-23-6 is a smaller 6-pin package compared to the 8-pin SOIC used by MP4068GN-Z and AL9910S-13. This package change requires PCB redesign and is not a direct drop-in replacement. The different pin count reflects different internal architecture and feature set.

Q: Is RT8415GSP still available for new projects?

A: RT8415GSP is marked as obsolete, meaning Richtek USA Inc. has discontinued production. While inventory may exist through distributors, long-term availability is not guaranteed. New designs should not rely on this part; use AL9910S-13 or MP4068GN-Z instead.

Q: What does MSL rating mean for component substitution?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be stored in standard conditions before moisture absorption affects solderability. AL9910S-13 has MSL 1 (Unlimited storage), while MP4068GN-Z has MSL 2A (4 weeks maximum). Lower MSL ratings provide greater flexibility in supply chain logistics and storage.

Q: Can I use AL9910S-13 in a 500V application?

A: AL9910S-13 supports supply voltages up to 500V maximum, but MP4068GN-Z is rated only to 5V. Substitution is valid only if your application operates within the overlapping voltage range. Verify that your circuit design does not exceed 5V input to maintain functional equivalence with the original MP4068GN-Z specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MP4068GN-Z, AL9910S-13, RT7304GE, and RT8415GSP are all RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in most markets.