SSL21084AT/1,118 LED Driver IC Equivalent & Substitute Parts

Part Overview

The SSL21084AT/1,118 is an AC DC offline switcher LED driver IC manufactured by NXP USA Inc., designed for single-output lighting applications with PWM dimming capability. This component features a 1A internal switch, operates across 8V to 14V supply range, and is housed in a 12-SO package. The part is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SSL21084AT/1,118

NXP USA Inc.In Stock: 671SSL21084AT/1,118 Datasheet

Current PartRFQ

NCL30186DDR2G

onsemiIn Stock: 7224NCL30186DDR2G Datasheet

MFR RecommendedRFQ

TPS92010D

Texas InstrumentsIn Stock: 1480TPS92010D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SSL21084AT/1,118 is determined by the following critical parameters:

Primary Substitution Criteria:

• AC DC offline switcher topology for LED driver applications
• Single output configuration
• PWM dimming capability
• Supply voltage compatibility within or overlapping the 8V to 14V range
• 1A output current capability
• Surface mount packaging
• ROHS3 compliance and MSL 1 rating

Substitute Parts Identified:

1. NCL30186DDR2G (onsemi) - Supports multiple topologies (Flyback, SEPIC, Step-Down, Step-Up) with both analog and PWM dimming, supply range 8.8V to 25.5V, 10-SOIC package, active product status
2. TPS92010D (Texas Instruments) - Flyback topology with 1A output current, supply maximum 21V, 8-SOIC package, active product status with TrueDrive™ series designation

Both substitutes meet the core functional requirements of AC DC offline switching for LED driver applications with single output and dimming support.

Parameter Comparison

Engineering Selection Recommendations

NCL30186DDR2G (onsemi):

• Active product status with established supply chain availability (7162 pcs in stock)
• Extended supply voltage range (8.8V to 25.5V) provides broader application flexibility beyond the original 8V to 14V specification
• Supports multiple converter topologies, enabling design optimization for specific application requirements
• Dual dimming capability (analog and PWM) accommodates various control interface requirements
• 10-SOIC package requires PCB layout modification compared to the 12-lead original
• ROHS3 compliant with MSL 1 rating matches original compliance profile

TPS92010D (Texas Instruments):

• Active product status with established supply chain availability (1380 pcs in stock)
• Maintains 1A output current specification matching the original part
• Supply voltage maximum of 21V exceeds the original 14V specification
• Flyback topology differs from the original step-down topology, requiring circuit redesign
• 8-SOIC package represents significant footprint reduction from the 12-lead original
• Operating temperature maximum of 105°C is 20°C lower than the original specification
• ROHS3 compliant with MSL 1 rating matches original compliance profile

Frequently Asked Questions (FAQ)

Q: Can NCL30186DDR2G directly replace SSL21084AT/1,118 without circuit modification?

A: No. While both are AC DC offline switcher LED drivers with single output and PWM dimming, the NCL30186DDR2G supports multiple topologies (Flyback, SEPIC, Step-Down, Step-Up) compared to the original step-down topology. The 10-SOIC package differs from the 12-lead original, requiring PCB layout changes. Circuit redesign is necessary to accommodate the different pin configuration and topology selection.

Q: What is the primary advantage of TPS92010D as a substitute?

A: The TPS92010D maintains the 1A output current specification of the original part and uses a more compact 8-SOIC package. However, it employs flyback topology rather than step-down, necessitating complete circuit redesign. The lower maximum operating temperature (105°C vs. 125°C) may limit use in high-temperature environments.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both NCL30186DDR2G and TPS92010D are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original SSL21084AT/1,118 compliance profile.

Q: Which substitute offers the best supply voltage compatibility?

A: The NCL30186DDR2G provides the widest supply voltage range (8.8V to 25.5V), exceeding the original 8V to 14V specification. The TPS92010D maximum supply voltage is 21V. Both exceed the original maximum specification, but the NCL30186DDR2G offers greater flexibility for applications requiring higher input voltages.

Q: What packaging considerations apply when selecting a substitute?

A: The original SSL21084AT/1,118 uses a 12-lead 14-SOIC package. The NCL30186DDR2G uses 10-SOIC, and the TPS92010D uses 8-SOIC. Each package change requires PCB redesign, including trace routing, component placement, and thermal management layout adjustments. Pin-to-pin compatibility does not exist between these packages.

Q: Can I use NCL30186DDR2G in step-down topology to match the original circuit?

A: The NCL30186DDR2G supports step-down (buck) topology as one of its available configurations. However, the different pin assignments, control interface requirements, and feedback network design compared to the original SSL21084AT/1,118 require complete circuit validation and redesign.