TPS92002DR LED Driver IC Equivalent & Substitute Parts

Part Overview

The TPS92002DR is a Texas Instruments LED driver IC designed for AC/DC offline switching applications with Triac dimming capability. This surface-mount 8-SOIC device operates as a flyback and step-down converter, delivering 5V output for lighting applications across the -40°C to 85°C temperature range. The product is currently in Last Time Buy status, making identification of functionally equivalent alternatives essential for design continuity and long-term supply chain planning.

Substiute Parts

TPS92002DR

Texas InstrumentsIn Stock: 1152TPS92002DR Datasheet

Current PartRFQ

LNK406LG

Power IntegrationsIn Stock: 1245LNK406LG Datasheet

MFR RecommendedRFQ

LT3799EMSE#TRPBF

Analog Devices Inc.In Stock: 3688LT3799EMSE#TRPBF Datasheet

MFR RecommendedRFQ

RT7306DGS

Richtek USA Inc.In Stock: 10753RT7306DGS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS92002DR is determined by the following critical parameters:

• Functional Type: AC/DC offline switcher with LED driver capability
• Dimming Control: Triac dimming support
• Topology Compatibility: Flyback topology (primary requirement); step-down buck topology acceptable as secondary topology
• Number of Outputs: Single output configuration
• Package Compatibility: Surface-mount packages with equivalent or superior thermal characteristics
• Voltage Supply Range: Maximum supply voltage of 21V or higher
• Output Voltage: 5V nominal output
• Operating Temperature: Minimum -40°C to maximum 85°C or wider range
• Compliance: ROHS3 compliance required

The three substitute parts listed below meet these core substitution criteria while offering variations in switching frequency, supply voltage range, and package form factor.

Parameter Comparison

Engineering Selection Recommendations

LNK406LG (Power Integrations)

The LNK406LG is an active product with extended operating temperature range (-40°C to 150°C junction temperature) and significantly higher supply voltage capability (725V maximum). This part maintains Triac dimming functionality and flyback topology. The primary design consideration is the through-hole mounting requirement, which differs from the surface-mount configuration of the TPS92002DR. This substitution is suitable for applications where PCB layout can accommodate through-hole placement and where the extended temperature range provides operational margin.

LT3799EMSE#TRPBF (Analog Devices Inc.)

The LT3799EMSE#TRPBF is an active product with ROHS3 compliance and maintains Triac dimming and flyback topology. This 16-MSOP surface-mount package offers a wider switching frequency range (25kHz to 300kHz) compared to the fixed 100kHz of the TPS92002DR. The operating temperature range extends to 125°C junction temperature. Supply voltage specifications are not provided in the available data. This substitution is applicable where the flexible frequency range and surface-mount package are compatible with existing PCB designs.

RT7306DGS (Richtek USA Inc.)

The RT7306DGS is an active product with ROHS3 compliance, matching the 8-SOIC surface-mount package footprint of the TPS92002DR. This part supports flyback, step-down, and step-up topologies with a supply voltage range of 11V to 34V. The critical distinction is the use of analog dimming rather than Triac dimming. This substitution is applicable only in applications where analog dimming control can replace Triac dimming functionality, or where the application does not require Triac dimming capability.

Frequently Asked Questions (FAQ)

Q: Can the LNK406LG replace the TPS92002DR in a surface-mount assembly?

A: The LNK406LG uses through-hole mounting (7-SSIP package with formed leads), whereas the TPS92002DR is surface-mount (8-SOIC). Direct PCB substitution is not possible without redesign of the component placement and soldering process. Through-hole and surface-mount assembly methods are distinct manufacturing processes.

Q: What is the primary difference between the RT7306DGS and the TPS92002DR?

A: The RT7306DGS uses analog dimming control, while the TPS92002DR uses Triac dimming. These are fundamentally different dimming architectures. The RT7306DGS is suitable only if the application circuit can be modified to support analog dimming or if Triac dimming is not required.

Q: Are all substitute parts ROHS3 compliant?

A: The LNK406LG is RoHS compliant (not specifically ROHS3). The LT3799EMSE#TRPBF and RT7306DGS are both ROHS3 compliant, matching the compliance level of the TPS92002DR.

Q: Which substitute part has the closest package compatibility?

A: The RT7306DGS matches the TPS92002DR package specification exactly (8-SOIC, 0.154", 3.90mm width, surface-mount). This part requires no PCB layout modifications for package footprint compatibility.

Q: What is the operating temperature difference between the TPS92002DR and its substitutes?

A: The TPS92002DR operates from -40°C to 85°C (ambient temperature). The LNK406LG extends to 150°C (junction temperature), the LT3799EMSE#TRPBF to 125°C (junction temperature), and the RT7306DGS to 125°C (junction temperature). All substitutes support the full operating range of the original part.

Q: Can the LT3799EMSE#TRPBF be used as a direct replacement?

A: The LT3799EMSE#TRPBF maintains Triac dimming and flyback topology, but uses a 16-MSOP package instead of the 8-SOIC package. This requires PCB redesign. Additionally, supply voltage specifications are not provided for this part, requiring verification against your specific application requirements.