ISL1902FAZ Equivalent & Substitute Parts

Part Overview

The ISL1902FAZ is an LED driver IC manufactured by Renesas Electronics Corporation, designed for AC DC offline switching applications with PWM and analog dimming capabilities. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The ISL1902FAZ supports multiple topologies including Flyback, Forward, SEPIC, and Step-Up (Boost) configurations, with a single output and operating range of 9V to 20V supply voltage.

Substiute Parts

ISL1902FAZ

Renesas Electronics CorporationIn Stock: 1166ISL1902FAZ Datasheet

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LNK416LG

Power IntegrationsIn Stock: 1716LNK416LG Datasheet

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LT3799EMSE-1#PBF

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

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LYT2005E

Power IntegrationsIn Stock: 4577LYT2005E Datasheet

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TPS92210D

Texas InstrumentsIn Stock: 1328TPS92210D Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the ISL1902FAZ is determined by the following critical parameters:

• Type & Topology: AC DC Offline Switcher with Flyback topology as primary requirement
• Dimming Capability: PWM or Triac dimming support for lighting applications
• Supply Voltage Range: Compatibility with 9V to 20V input or higher voltage tolerance
• Number of Outputs: Single output configuration
• Mounting & Package: Surface mount compatibility preferred for design continuity
• Product Status: Active status preferred for long-term availability
• Compliance: RoHS and REACH compliance maintained

The substitute parts listed below meet these core functional requirements while offering active product status and improved availability compared to the obsolete ISL1902FAZ.

Parameter Comparison

Engineering Selection Recommendations

TPS92210D (Texas Instruments) provides the closest functional match to the ISL1902FAZ. Both components operate within the 9V to 20V supply voltage range, support Flyback topology, and are designed for lighting applications. The TPS92210D maintains ROHS3 compliance and offers active product status with unlimited MSL rating, ensuring long-term availability and reliability for production designs.

LT3799EMSE-1#PBF (Analog Devices Inc.) is suitable for designs requiring Triac dimming capability instead of PWM. This part maintains ROHS3 compliance and offers a wider frequency range (25kHz to 300kHz), providing flexibility for various transformer designs. Surface mount packaging aligns with modern PCB assembly practices.

LNK416LG (Power Integrations) supports PWM dimming and includes an integrated internal switch, reducing external component count. However, the higher minimum supply voltage (36V) and through-hole package require circuit redesign considerations. This option is appropriate for higher voltage input applications.

LYT2005E (Power Integrations) is a specialized offline Flyback converter with integrated switch and 12W power rating. This part is suitable for fixed-power applications but lacks explicit dimming control specifications, limiting its use in variable-brightness lighting designs.

All substitute parts maintain RoHS and REACH compliance, ensuring regulatory alignment with the original ISL1902FAZ specification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ISL1902FAZ with TPS92210D without PCB modifications?

A: Both parts operate within the same 9V to 20V supply voltage range and support Flyback topology for lighting applications. However, package differences (24-SSOP vs. 8-SOIC) require PCB layout changes. Verify dimming control requirements: TPS92210D supports Triac dimming while ISL1902FAZ supports both Analog and PWM dimming.

Q: What is the key difference between PWM and Triac dimming options?

A: PWM dimming (LNK416LG) controls brightness by varying the duty cycle of the switching frequency. Triac dimming (LT3799EMSE-1#PBF, TPS92210D) responds to phase-cut signals from standard wall dimmers. Select based on your end-application dimming interface requirements.

Q: Why does LNK416LG have a higher minimum supply voltage (36V) than the original part?

A: LNK416LG is designed for higher voltage input ranges (36V to 725V) and includes an integrated internal switch, making it suitable for different application classes. Use this part only if your circuit design supports the higher voltage requirement.

Q: Are all substitute parts suitable for the same PCB footprint?

A: No. The ISL1902FAZ uses 24-SSOP packaging, while substitutes use different packages (8-SOIC, 16-MSOP, 7-SSIP). PCB redesign is required for any substitution. Verify pinout compatibility and thermal requirements before layout changes.

Q: Which substitute offers the best long-term availability?

A: All listed substitutes have active product status. TPS92210D and LT3799EMSE-1#PBF offer unlimited MSL ratings (1 Level), providing superior storage stability compared to the original ISL1902FAZ (MSL 2, 1 Year).

Q: Do all substitutes maintain the same compliance certifications?

A: Yes. All substitute parts are RoHS and REACH compliant, matching the original ISL1902FAZ regulatory status. Verify specific certifications with your supplier for your target market requirements.