ISL1904FAZ Equivalent & Substitute Parts

Part Overview

The ISL1904FAZ is an LED driver IC manufactured by Renesas Electronics Corporation, designed for AC/DC offline switching applications with Triac dimming capability. This component functions as a 1-output power management IC supporting Flyback, Step-Down (Buck), and Step-Up (Boost) topologies for lighting applications.

The ISL1904FAZ is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

ISL1904FAZ

Renesas Electronics CorporationIn Stock: 906ISL1904FAZ Datasheet

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AL1692-20CS7-13

Diodes IncorporatedIn Stock: 2842AL1692-20CS7-13 Datasheet

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TPS92210DR

Texas InstrumentsIn Stock: 32942TPS92210DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISL1904FAZ are identified based on the following critical parameters that determine functional equivalence:

• Primary Function: AC/DC offline LED driver with Triac dimming
• Supply Voltage Range: 9V to 20V input compatibility
• Output Configuration: Single output topology
• Dimming Method: Triac-based dimming capability
• Operating Temperature Range: Support for -40°C to 125°C operation
• Compliance: ROHS3 compliance and EAR99 classification
• Mounting: Surface mount technology

The substitute parts identified (TPS92210DR and AL1692-20CS7-13) maintain functional equivalence within these core parameters while accommodating variations in package form factor, internal switch configuration, and frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

TPS92210DR (Texas Instruments) is an active product with identical supply voltage range (9V–20V) and operating temperature range (-40°C to 125°C) to the ISL1904FAZ. This part maintains Triac dimming functionality and AC/DC offline switcher topology. The package transition from 16-QSOP to 8-SOIC requires PCB layout modification. This substitute is suitable for new designs or production transitions where layout redesign is acceptable.

AL1692-20CS7-13 (Diodes Incorporated) is an active product supporting the same supply voltage range with Triac dimming and AC/DC offline switcher topology. The operating temperature range extends to 105°C (versus 125°C for the ISL1904FAZ), which may limit use in high-temperature applications. The package form factor (7-SO) differs from the original 16-QSOP. This substitute is suitable for applications operating within the -40°C to 105°C range where package footprint constraints permit the smaller form factor.

Both substitute parts carry ROHS3 compliance and EAR99 classification, matching the regulatory status of the ISL1904FAZ.

Frequently Asked Questions (FAQ)

Q: Can TPS92210DR directly replace ISL1904FAZ without circuit modification?

A: TPS92210DR maintains functional equivalence in supply voltage range, dimming method, and operating temperature. However, the package change from 16-QSOP to 8-SOIC requires PCB layout redesign. Pin configuration and internal switch characteristics differ, necessitating schematic review before implementation.

Q: What is the primary limitation of AL1692-20CS7-13 as a substitute?

A: The maximum operating temperature of AL1692-20CS7-13 is 105°C, compared to 125°C for the ISL1904FAZ. Applications requiring sustained operation above 105°C are not suitable for this substitute. Additionally, the 7-SO package differs from the original 16-QSOP form factor.

Q: Are both substitute parts suitable for Triac dimming applications?

A: Yes. Both TPS92210DR and AL1692-20CS7-13 support Triac dimming functionality, matching the ISL1904FAZ specification.

Q: What compliance certifications apply to these substitute parts?

A: All three parts (ISL1904FAZ, TPS92210DR, and AL1692-20CS7-13) are ROHS3 compliant and classified as EAR99 for export control purposes.

Q: How do the supply voltage ranges compare?

A: ISL1904FAZ and TPS92210DR both operate from 9V to 20V. AL1692-20CS7-13 operates from 8.5V to 20V, providing slightly lower minimum voltage tolerance.

Q: Which substitute is recommended for new production designs?

A: Selection depends on application constraints. TPS92210DR is recommended where the full -40°C to 125°C temperature range is required. AL1692-20CS7-13 is suitable for applications within -40°C to 105°C where the smaller 7-SO package is acceptable.