LNK404EG LED Driver IC Equivalent & Substitute Parts

Part Overview

The LNK404EG is an AC DC offline switcher LED driver IC manufactured by Power Integrations, designed for lighting applications requiring triac dimming capability. This device operates as a flyback topology converter with an integrated internal switch, supporting input voltage ranges from 36V to 725V and delivering 1.02A output current. The LNK404EG is part of the LinkSwitch®-PH series and maintains Active product status with full RoHS compliance.

Equivalent and substitute parts are identified when design requirements necessitate alternative packaging formats, different mounting technologies, modified supply voltage ranges, or alternative dimming control methods while maintaining functional compatibility for LED driver applications.

Substiute Parts

LNK404EG

Power IntegrationsIn Stock: 59240LNK404EG Datasheet

Current PartRFQ

AL9910S-13

Diodes IncorporatedIn Stock: 13831AL9910S-13 Datasheet

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LT3799EMSE#PBF

Analog Devices Inc.In Stock: 1960LT3799EMSE#PBF Datasheet

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MP4027GJ-Z

Monolithic Power Systems Inc.In Stock: 36443MP4027GJ-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LNK404EG are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Device Type: AC DC Offline Switcher
• Application Category: LED Driver
• Number of Outputs: 1
• Dimming Capability: Triac or PWM control methods
• Topology: Flyback or equivalent buck/boost configurations
• Product Status: Active
• Compliance: RoHS and REACH requirements

Secondary Compatibility Factors:

• Voltage Supply Range: Minimum 36V input capability
• Operating Temperature Range: Support for -40°C minimum
• Mounting Technology: Surface mount or through-hole alternatives
• Package Type: Functional equivalence in lead count and thermal management

The three substitute parts listed below satisfy the primary criteria for LED driver applications while offering variations in packaging, mounting technology, and dimming control methods.

Parameter Comparison

Engineering Selection Recommendations

LNK404EG (Main Part): Recommended for through-hole mounting applications requiring high input voltage tolerance (36V to 725V) and extended junction temperature operation to 150°C. The integrated internal switch and fixed 66kHz frequency provide optimized performance for standard triac-dimmed LED lighting circuits. RoHS compliance and unlimited MSL rating support standard manufacturing and storage conditions.

AL9910S-13 (Diodes Incorporated): Suitable for surface-mount implementations where input voltage range is 15V to 500V and operating temperature to 85°C is acceptable. The absence of an internal switch requires external switching components. Dual dimming capability (Analog and PWM) provides flexibility for various lighting control architectures. Tape & Reel packaging supports high-volume automated assembly. ROHS3 compliance confirmed.

LT3799EMSE#PBF (Analog Devices Inc.): Applicable for surface-mount designs requiring triac dimming control with operating temperature to 125°C. The 16-MSOP-EP package offers compact form factor with exposed pad for thermal management. Flyback topology matches the main part's architecture. Input voltage specifications are not provided; verification against application requirements is necessary. ROHS3 compliance confirmed.

MP4027GJ-Z (Monolithic Power Systems Inc.): Intended for low-voltage applications (12V to 28V input range) with PWM dimming control and surface-mount TSOT-23-8 packaging. Operating temperature to 125°C and flyback topology provide compatibility with lighting applications. Frequency specification is not provided. ROHS3 compliance confirmed. This part is most suitable for low-voltage LED driver circuits.

All substitute parts maintain Active product status, RoHS compliance, and unlimited MSL ratings, ensuring compatibility with standard procurement and manufacturing workflows.

Frequently Asked Questions (FAQ)

Q1: Can the AL9910S-13 directly replace the LNK404EG in existing through-hole PCB designs?

A: No. The AL9910S-13 is a surface-mount device in 8-SOIC package, while the LNK404EG uses through-hole 7-SSIP eSIP-7C packaging. PCB redesign is required. Additionally, the AL9910S-13 lacks an internal switch, requiring external switching components not present in LNK404EG designs.

Q2: What are the voltage supply limitations when considering substitute parts?

A: The LNK404EG supports 36V to 725V input. The AL9910S-13 supports 15V to 500V, and the MP4027GJ-Z supports only 12V to 28V. The LT3799EMSE#PBF does not specify input voltage limits. Verify application input voltage requirements against each substitute's rated range before selection.

Q3: How do dimming control methods differ between these parts?

A: The LNK404EG and LT3799EMSE#PBF use triac dimming, compatible with standard wall-dimmer controls. The AL9910S-13 supports both analog and PWM dimming, offering broader control flexibility. The MP4027GJ-Z uses PWM dimming only. Select based on the dimming control method required by the application.

Q4: Are there thermal performance differences between through-hole and surface-mount packages?

A: Yes. The LNK404EG through-hole eSIP-7C package operates to 150°C junction temperature. Surface-mount alternatives operate to 85°C (AL9910S-13 ambient) or 125°C (LT3799EMSE#PBF and MP4027GJ-Z junction). High-temperature applications favor the LNK404EG or LT3799EMSE#PBF.

Q5: Do all substitute parts have the same internal switch configuration?

A: No. The LNK404EG includes an internal switch. The AL9910S-13, LT3799EMSE#PBF, and MP4027GJ-Z do not include internal switches, requiring external switching components. Circuit design modifications are necessary when substituting with these parts.

Q6: What packaging and supply chain considerations apply to these parts?

A: The LNK404EG is supplied in Tube format. The AL9910S-13 uses Tape & Reel (TR) for automated assembly. The LT3799EMSE#PBF is supplied in Tube. The MP4027GJ-Z uses Cut Tape (CT) & Digi-Reel® format. Select based on manufacturing process requirements and inventory management practices.

Q7: Are all parts RoHS compliant?

A: Yes. The LNK404EG is RoHS Compliant. The AL9910S-13, LT3799EMSE#PBF, and MP4027GJ-Z are all ROHS3 Compliant. All parts are REACH Unaffected and carry EAR99 ECCN classification with identical HTSUS code 8542.39.0001.

Q8: Which substitute part is most suitable for low-voltage LED driver applications?

A: The MP4027GJ-Z is designed for 12V to 28V input range, making it the appropriate choice for low-voltage LED driver circuits. The LNK404EG and other substitutes are rated for higher input voltages and are not optimized for low-voltage applications.