AL1676-20CS7-13 Equivalent & Substitute Parts

Part Overview

The AL1676-20CS7-13 is an LED Driver IC manufactured by Diodes Incorporated, designed as a 1-output AC DC offline switcher with step-down (buck) topology and 2A output current capability in an 8-SOIC package. The device operates across a 8.5V to 18V supply range and is classified as obsolete. Due to its obsolete status, equivalent substitute parts are necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

AL1676-20CS7-13

Diodes IncorporatedIn Stock: 32116AL1676-20CS7-13 Datasheet

Current PartRFQ

BD555A1AFV-E2

ROHM SemiconductorIn Stock: 1028BD555A1AFV-E2 Datasheet

MFR RecommendedRFQ

LNK408LG

Power IntegrationsIn Stock: 1100LNK408LG Datasheet

MFR RecommendedRFQ

LYT1404D-TL

Power IntegrationsIn Stock: 1135LYT1404D-TL Datasheet

MFR RecommendedRFQ

MP4050AGJ-Z

Monolithic Power Systems Inc.In Stock: 745MP4050AGJ-Z Datasheet

MFR RecommendedRFQ

NCL30088DDR2G

onsemiIn Stock: 5107NCL30088DDR2G Datasheet

MFR RecommendedRFQ

TPS92411PDDAR

Texas InstrumentsIn Stock: 15459TPS92411PDDAR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AL1676-20CS7-13 is determined by the following critical parameters:

• Type: AC DC Offline Switcher
• Topology: Step-Down (Buck) or compatible topologies (Flyback, Multi-topology)
• Number of Outputs: 1 output
• Internal Switch(s): Yes (integrated power switch required)
• Supply Voltage Range: Minimum 8.5V to 18V maximum compatibility
• Output Current: 2A capability
• Package Compatibility: Surface mount packages (8-SOIC or equivalent footprints)
• Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts are grouped based on topology alignment and electrical parameter compatibility. Parts with step-down (buck) topology provide direct functional equivalence. Parts with alternative topologies (flyback, multi-topology) are included where supply voltage and output current specifications overlap with the original device.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Direct Topology Match)

NCL30088DDR2G and LYT1404D-TL are recommended as primary substitutes. Both devices are active products with ROHS3 compliance and REACH unaffected status. NCL30088DDR2G maintains the 8-SOIC package footprint and operates within the 8.8V to 20V supply range, closely matching the original AL1676-20CS7-13 electrical envelope. LYT1404D-TL operates from 90VAC to 308VAC input and is part of the active LYTSwitch-1 series, providing long-term availability and design stability.

Secondary Substitutes (Active Status, Alternative Topology)

TPS92411PDDAR and LNK408LG are active products offering multi-topology or flyback configurations. TPS92411PDDAR supports flyback, step-down, and step-up topologies with a 7.5V to 94V supply range and operates to 150°C junction temperature. LNK408LG is a through-hole device with triac dimming capability and operates across a wide 36V to 725V supply range, suitable for applications requiring extended voltage operation.

Obsolete Alternatives (Not Recommended for New Designs)

BD555A1AFV-E2 is classified as obsolete and should not be selected for new designs despite its step-down topology and ROHS3 compliance.

Compliance Verification

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original AL1676-20CS7-13 device.

Frequently Asked Questions (FAQ)

Q: Can NCL30088DDR2G directly replace AL1676-20CS7-13 in existing designs?

A: NCL30088DDR2G shares the 8-SOIC package footprint and operates within a compatible supply voltage range (8.8V to 20V). However, NCL30088DDR2G uses flyback topology rather than step-down (buck) topology. Circuit redesign may be required to accommodate the topology difference. Verify that the flyback topology is compatible with your power stage design before implementation.

Q: What is the primary difference between step-down (buck) and flyback topologies?

A: Step-down (buck) topology uses a series switch to directly reduce input voltage to output voltage, suitable for applications with moderate voltage conversion ratios. Flyback topology uses transformer isolation and energy storage in the transformer core, enabling wider input-to-output voltage conversion ranges and inherent isolation. Topology selection depends on application requirements for isolation, voltage conversion range, and output power distribution.

Q: Is LYT1404D-TL suitable for designs currently using AL1676-20CS7-13?

A: LYT1404D-TL is an active product with step-down (buck) topology matching the original device. However, it operates from 90VAC to 308VAC input, which differs from the AL1676-20CS7-13 DC supply range of 8.5V to 18V. LYT1404D-TL is appropriate only if your application uses AC mains input. For DC input applications, select NCL30088DDR2G or TPS92411PDDAR instead.

Q: Why is BD555A1AFV-E2 listed if it is obsolete?

A: BD555A1AFV-E2 is included in the substitute list because it was originally referenced in the AL1676-20CS7-13 substitute cross-reference data. However, its obsolete status makes it unsuitable for new designs or long-term production. Active alternatives such as NCL30088DDR2G or LYT1404D-TL are preferred.

Q: What package considerations apply when selecting a substitute?

A: AL1676-20CS7-13 uses an 8-SOIC package with 7 leads. NCL30088DDR2G maintains this footprint for direct PCB compatibility. LYT1404D-TL uses an 8SO package, TPS92411PDDAR uses 8-PowerSOIC, and LNK408LG uses 7-SSIP through-hole package. Verify PCB layout compatibility and thermal management requirements before selecting a substitute with a different package.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed maintain RoHS compliance (ROHS3 or RoHS Compliant) and REACH unaffected status, ensuring regulatory alignment with the original AL1676-20CS7-13 device.