AL1677-20BS-13 Equivalent & Substitute Parts

Part Overview

The AL1677-20BS-13 is an LED driver IC manufactured by Diodes Incorporated, designed for AC DC offline switching applications. This device functions as a step-down (buck) converter with a single output, delivering 2A at 15V output voltage from an 8.5V to 16.2V supply range. The component is actively produced and widely used in lighting applications.

Finding equivalent and substitute parts becomes necessary due to supply chain constraints, inventory availability, or design optimization requirements. The substitute parts listed below maintain compatibility with the AL1677-20BS-13 based on critical electrical and mechanical parameters.

Substiute Parts

AL1677-20BS-13

Diodes IncorporatedIn Stock: 6780AL1677-20BS-13 Datasheet

Current PartRFQ

AL1677-20BS-13

Diodes IncorporatedIn Stock: 6780AL1677-20BS-13 Datasheet

Parametric EquivalentRFQ

TPS92001DGKR

Texas InstrumentsIn Stock: 55130TPS92001DGKR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AL1677-20BS-13 are identified based on the following critical parameters:

• Topology: AC DC Offline Switcher with step-down (buck) conversion capability
• Output Configuration: Single output channel
• Voltage Range: Supply voltage compatibility within or overlapping the 8.5V to 16.2V range
• Output Voltage: 15V nominal output
• Current Capability: 2A output current per channel
• Package Type: Surface mount 8-pin configuration
• Operating Temperature Range: -40°C to 105°C
• Compliance: ROHS3 compliant for regulatory alignment

The TPS92001DGKR from Texas Instruments is identified as a manufacturer-recommended substitute. While it exhibits differences in certain parameters (such as topology flexibility and dimming capability), it maintains functional equivalence for AC DC offline switching applications in lighting systems.

Parameter Comparison

Engineering Selection Recommendations

AL1677-20BS-13 (Primary Selection)

The AL1677-20BS-13 maintains Active product status with continuous manufacturing support. This part is recommended for new designs and applications requiring long-term availability. The device carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Inventory availability of 6700 units supports immediate procurement needs.

TPS92001DGKR (Substitute Selection)

The TPS92001DGKR is designated as a manufacturer-recommended substitute by Texas Instruments. However, this part carries Last Time Buy status, indicating discontinued production with limited future availability. Selection of this substitute should be restricted to applications where existing inventory can support the product lifecycle. The part maintains ROHS3 compliance and superior moisture sensitivity rating (MSL 2 versus MSL 3). Package dimensions differ slightly (8-TSSOP/MSOP versus 8-SOIC), requiring PCB layout verification. Output voltage specification (5V) and topology differences (Flyback capability with Triac dimming) represent functional deviations from the primary part.

Frequently Asked Questions (FAQ)

Q: Can the TPS92001DGKR directly replace the AL1677-20BS-13 in existing designs?

A: Direct replacement requires verification of output voltage requirements and PCB layout compatibility. The TPS92001DGKR specifies 5V output versus the AL1677-20BS-13's 15V output. Package footprints differ between 8-SOIC and 8-TSSOP/MSOP configurations. Circuit topology differences (Flyback versus Buck) may require design modifications.

Q: What is the significance of "Last Time Buy" status for the TPS92001DGKR?

A: Last Time Buy designation indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but future procurement cannot be guaranteed. This status restricts the substitute to applications with defined product lifecycles or where existing stock can support long-term requirements.

Q: Are both parts compliant with current regulatory standards?

A: Both the AL1677-20BS-13 and TPS92001DGKR maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for electronic components in lighting applications.

Q: How do package differences affect component selection?

A: The AL1677-20BS-13 uses 8-SOIC packaging (0.154" width), while the TPS92001DGKR uses 8-TSSOP/MSOP packaging (0.118" width). These different footprints require separate PCB designs and cannot be used interchangeably on the same circuit board without layout redesign.

Q: What is the difference in moisture sensitivity between these parts?

A: The AL1677-20BS-13 carries MSL 3 rating (168 hours), while the TPS92001DGKR carries MSL 2 rating (1 year). Lower MSL values indicate greater tolerance to moisture exposure during storage and handling, providing superior protection in humid environments.