AL1697-20CS7-13 Equivalent & Substitute Parts

Part Overview

The AL1697-20CS7-13 is an LED driver IC manufactured by Diodes Incorporated, designed for AC/DC offline switching applications with integrated triac dimming capability. This device functions as a step-down/step-up converter with a 2A output current rating and operates across an 8.5V to 18V supply range. The component is actively produced and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to address inventory availability, alternative packaging requirements, or specific application topology preferences while maintaining functional equivalence in LED driver offline switching applications.

Substiute Parts

AL1697-20CS7-13

Diodes IncorporatedIn Stock: 60403AL1697-20CS7-13 Datasheet

Current PartRFQ

LT3799EMSE#PBF

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AL1697-20CS7-13 is evaluated based on the following critical parameters that define functional equivalence in offline LED driver applications:

Primary Substitution Criteria:

• Product Category: Power Management (PMIC) - LED Driver IC
• Application Type: AC/DC Offline Switcher with Triac Dimming
• Number of Outputs: Single output configuration
• Dimming Method: Triac-compatible dimming interface
• Compliance: RoHS3 and REACH compliance status
• Moisture Sensitivity: MSL 1 rating
• Product Status: Active manufacturing status

Secondary Compatibility Factors:

• Operating Temperature Range: Minimum -40°C capability
• Mounting Type: Surface Mount technology
• Output Voltage Capability: 600V output voltage class
• Supply Voltage Range: Compatible with 8.5V to 18V input specification

The LT3799EMSE#PBF qualifies as a manufacturer-recommended substitute based on matching the core functional requirements: single-output AC/DC offline switcher topology with integrated triac dimming, active product status, RoHS3 compliance, and MSL 1 rating. Topology variation (Flyback vs. Buck/Boost) and package differences represent design trade-offs that do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

AL1697-20CS7-13 Selection Criteria:

• Preferred for applications requiring buck/boost topology flexibility
• Compact 7-lead SOIC package suitable for space-constrained designs
• Operating temperature range to 105°C adequate for standard industrial environments
• Active product status with established supply chain (60,300 pcs inventory)

LT3799EMSE#PBF Selection Criteria:

• Preferred for flyback topology requirements in isolated output applications
• Extended operating temperature range to 125°C for high-temperature environments
• 16-lead MSOP package with exposed pad provides enhanced thermal management
• Manufacturer-recommended substitute with active production status (1,900 pcs inventory)

Both parts maintain identical compliance certifications (RoHS3, REACH Unaffected, EAR99 ECCN classification) and MSL 1 moisture sensitivity rating. Selection between these devices depends on topology requirements (buck/boost vs. flyback), thermal performance needs, and PCB layout constraints rather than functional capability differences in triac-dimmed LED driver applications.

Frequently Asked Questions (FAQ)

Q: Can the LT3799EMSE#PBF directly replace the AL1697-20CS7-13 in existing designs?

A: Direct pin-for-pin replacement is not possible due to different package types (7-lead SOIC vs. 16-lead MSOP) and topology differences (buck/boost vs. flyback). Circuit redesign is required, including transformer/inductor topology changes and PCB layout modifications. Functional substitution is valid when application requirements permit flyback topology operation.

Q: What are the key differences between buck/boost and flyback topologies in this application?

A: The AL1697-20CS7-13 uses buck/boost topology, allowing both step-down and step-up voltage conversion from a single inductor configuration. The LT3799EMSE#PBF uses flyback topology, which provides galvanic isolation through transformer coupling and is optimized for isolated output applications. Topology selection depends on isolation requirements and output voltage specifications.

Q: Are both parts suitable for triac dimming applications?

A: Yes. Both the AL1697-20CS7-13 and LT3799EMSE#PBF include integrated triac dimming capability and are specified for AC/DC offline switcher applications with triac phase-cut dimming interfaces. Dimming performance characteristics are determined by application circuit design rather than IC selection.

Q: What are the packaging implications for PCB design?

A: The AL1697-20CS7-13 uses an 8-SOIC package (0.154" width, 7 leads), while the LT3799EMSE#PBF uses a 16-TFSOP package with exposed pad (0.118" width). The LT3799EMSE#PBF's exposed pad provides superior thermal dissipation. Package selection affects PCB footprint, thermal management strategy, and component density.

Q: Do both parts meet the same compliance and reliability standards?

A: Yes. Both devices are RoHS3 compliant, REACH unaffected, classified as EAR99 for export control, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both maintain active product status with established manufacturing support.

Q: What inventory considerations apply to these substitutes?

A: The AL1697-20CS7-13 has significantly higher inventory availability (60,300 pcs) compared to the LT3799EMSE#PBF (1,900 pcs). For high-volume production, the AL1697-20CS7-13 offers better supply chain stability. The LT3799EMSE#PBF may require longer lead times for large orders.