LNK413LG LED Driver IC Equivalent & Substitute Parts

Part Overview

The LNK413LG is an AC DC offline switcher LED driver IC manufactured by Power Integrations, designed for lighting applications requiring PWM dimming control. This device operates as a flyback topology converter with an internal switch, supporting input voltage ranges from 36V to 725V. The LNK413LG is classified as an active product with full RoHS compliance and unlimited moisture sensitivity rating, making it suitable for production environments requiring long-term component availability and regulatory compliance.

Equivalent and substitute parts are identified when component availability becomes constrained, supply chain disruptions occur, or design flexibility is required for multi-source procurement strategies. Substitute LED driver ICs must maintain functional compatibility within the AC DC offline switcher category while meeting the core application requirements for lighting control.

Substiute Parts

LNK413LG

Power IntegrationsIn Stock: 665LNK413LG Datasheet

Current PartRFQ

HV9923N3-G

Microchip TechnologyIn Stock: 1649HV9923N3-G Datasheet

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LM3447MTE/NOPB

Texas InstrumentsIn Stock: 1365LM3447MTE/NOPB Datasheet

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LT3799EMSE-1#PBF

Analog Devices Inc.In Stock: 25435LT3799EMSE-1#PBF Datasheet

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TPS92210D

Texas InstrumentsIn Stock: 1328TPS92210D Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute LED driver ICs for the LNK413LG are identified based on the following core substitution criteria:

Primary Compatibility Factors:

• Device Type: AC DC Offline Switcher
• Application: Lighting
• Topology: Flyback or equivalent step-down converter architecture
• Number of Outputs: Single output configuration
• Internal Switch Capability: Integrated switching element
• Dimming Control: PWM or Triac dimming capability
• Product Status: Active manufacturing status
• Regulatory Compliance: RoHS and REACH compliance alignment

Secondary Compatibility Considerations:

• Operating temperature range overlap with application requirements
• Voltage supply range compatibility with target input specifications
• Package form factor and mounting type (through-hole or surface-mount alternatives)
• Frequency operation within acceptable switching ranges for lighting applications

The identified substitute parts maintain functional equivalence within the AC DC offline switcher LED driver category. Substitution is valid when the target application can accommodate differences in package type, mounting method, and specific voltage/frequency parameters, provided core topology and dimming control mechanisms remain compatible.

Parameter Comparison

Engineering Selection Recommendations

LNK413LG Primary Characteristics: The LNK413LG operates as a high-voltage AC DC offline switcher with integrated internal switching capability, supporting the widest input voltage range (36V to 725V) among the substitute options. PWM dimming control provides precise brightness adjustment for lighting applications. Through-hole eSIP-7F packaging enables direct board integration without surface-mount assembly requirements.

Substitute Selection Criteria:

HV9923N3-G (Microchip Technology): This device functions as an AC DC offline switcher with step-down topology and integrated internal switch. Operating temperature maximum of 85°C (TA) is lower than the LNK413LG. Input voltage range (20V to 400V) is narrower than the main part. Triac dimming replaces PWM control. Through-hole TO-92-3 packaging provides mechanical compatibility with through-hole design requirements. Selection is appropriate for applications with lower input voltage specifications and Triac dimming compatibility.

LM3447MTE/NOPB (Texas Instruments): This flyback topology device lacks internal switching capability, requiring external switch implementation. Input voltage range (7.5V to 17.5V) is significantly lower than the LNK413LG, limiting high-voltage application compatibility. Triac dimming control is specified. 14-TSSOP surface-mount package requires PCB redesign from through-hole layouts. Operating temperature range (-40°C to 125°C TJ) is within acceptable limits. Selection requires design modification for external switching and surface-mount assembly.

LT3799EMSE-1#PBF (Analog Devices Inc.): This flyback topology device operates without internal switching capability. Input voltage specifications are not provided in the parameter set, creating uncertainty for high-voltage application matching. Triac dimming is supported. Frequency range (25kHz to 300kHz) provides operational flexibility. 16-MSOP-EP surface-mount package requires PCB redesign. Operating temperature (-40°C to 125°C TJ) is acceptable. Selection requires external switching implementation and surface-mount assembly modification.

TPS92210D (Texas Instruments): This flyback topology device lacks internal switching capability. Input voltage range (9V to 20V) is significantly lower than the LNK413LG. Triac dimming control is specified. 8-SOIC surface-mount package requires PCB redesign. Operating temperature (-40°C to 125°C TA) is within acceptable limits. Selection is limited to low-voltage applications and requires external switching and surface-mount assembly.

Compliance and Availability: All substitute parts maintain active product status with ROHS3 compliance and unlimited MSL ratings, ensuring regulatory alignment and long-term supply chain viability. Inventory levels vary across manufacturers, with LT3799EMSE-1#PBF showing highest stock availability (25,400 units).

Frequently Asked Questions (FAQ)

Q1: Can the HV9923N3-G directly replace the LNK413LG in existing designs?

A: Direct replacement is not recommended without design review. The HV9923N3-G operates with step-down topology versus the LNK413LG flyback topology, and input voltage range (20V to 400V) is narrower than the main part (36V to 725V). Triac dimming replaces PWM control. Through-hole TO-92-3 packaging is mechanically compatible, but circuit topology differences require validation.

Q2: What are the key differences between PWM and Triac dimming control?

A: PWM (Pulse Width Modulation) dimming, used by the LNK413LG, controls brightness by varying the duty cycle of the switching signal at constant frequency. Triac dimming, used by all substitute parts, controls brightness by phase-angle modulation of the AC input waveform. These are fundamentally different control mechanisms requiring different circuit implementations and are not interchangeable without redesign.

Q3: Why do the LM3447MTE/NOPB, LT3799EMSE-1#PBF, and TPS92210D lack internal switching capability?

A: These devices function as LED driver controllers that require external power switching elements (MOSFETs or similar) to implement the actual power conversion. The LNK413LG integrates the switching element internally, reducing component count and PCB area. External switching designs provide flexibility for higher power applications but increase complexity and component count.

Q4: Can surface-mount substitute parts be used in through-hole designs?

A: Surface-mount packages (14-TSSOP, 16-MSOP-EP, 8-SOIC) require PCB redesign and assembly process modification from through-hole layouts. Direct mechanical substitution is not possible. Adapter boards or complete PCB redesign is necessary, making this approach impractical for existing through-hole designs.

Q5: Which substitute part is most suitable for high-voltage input applications?

A: The HV9923N3-G supports the highest input voltage among substitutes (20V to 400V), but this remains significantly lower than the LNK413LG (36V to 725V). For applications requiring input voltages above 400V, none of the identified substitutes are suitable without external voltage regulation or transformer-based input conditioning.

Q6: Are all substitute parts RoHS compliant?

A: Yes. All identified substitute parts (HV9923N3-G, LM3447MTE/NOPB, LT3799EMSE-1#PBF, TPS92210D) maintain ROHS3 compliance status, ensuring regulatory alignment with RoHS Directive requirements. The LNK413LG is RoHS Compliant. All parts carry unlimited MSL ratings (Level 1).

Q7: What is the operating temperature difference between the LNK413LG and substitute parts?

A: The LNK413LG supports the highest operating temperature (TJ maximum 150°C) among all parts. The HV9923N3-G is limited to 85°C (TA), while LM3447MTE/NOPB, LT3799EMSE-1#PBF, and TPS92210D support 125°C (TJ or TA). Applications requiring operation above 125°C are limited to the LNK413LG.

Q8: What inventory considerations apply to substitute selection?

A: LT3799EMSE-1#PBF shows highest availability (25,400 units), followed by HV9923N3-G (1,615 units), LM3447MTE/NOPB (1,277 units), and TPS92210D (1,275 units). The LNK413LG maintains 633 units in stock. Inventory levels should be evaluated against production volume and supply chain risk tolerance.