RT8462GS LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The RT8462GS is an active LED driver controller IC manufactured by Richtek USA Inc., designed for power management applications requiring PWM dimming control. This device functions as a DC-DC controller supporting both step-down (buck) and step-up (boost) topologies, making it suitable for backlight and lighting applications. The part is currently in active production status with 51,089 units in stock. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for LED driver controller applications.

Substiute Parts

RT8462GS

Richtek USA Inc.In Stock: 51163RT8462GS Datasheet

Current PartRFQ

LT3756EUD-1#PBF

Analog Devices Inc.In Stock: 2551LT3756EUD-1#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT8462GS are identified based on the following critical parameters that determine functional equivalence:

• Device Type: DC DC Controller for LED driver applications
• Topology Support: Step-Down (Buck) and Step-Up (Boost) capability
• Dimming Control: Analog and PWM dimming support
• Frequency Range: 100kHz to 1MHz operation
• Number of Outputs: Single output configuration
• Supply Voltage Compatibility: Overlapping input voltage range
• Operating Temperature Range: -40°C to 125°C (TJ)
• Product Status: Active production status
• Compliance: ROHS3 and REACH compliance

The LT3756EUD-1#PBF qualifies as a substitute based on these parameters. While it offers extended topology options (Flyback, SEPIC in addition to Buck and Boost) and a higher maximum supply voltage (100V vs. 36V), it maintains core functional equivalence for LED driver controller applications with matching dimming capabilities, frequency range, and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the RT8462GS and LT3756EUD-1#PBF are active production devices with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The RT8462GS operates within a 4.5V to 36V supply range and is packaged in a 14-SOIC form factor. The LT3756EUD-1#PBF extends the maximum supply voltage to 100V and offers additional topology options (Flyback and SEPIC), packaged in a 16-WFQFN form factor with superior moisture sensitivity characteristics (MSL 1 vs. MSL 3).

Selection between these devices depends on application-specific requirements: the RT8462GS is suitable for designs constrained to lower supply voltages and requiring the 14-SOIC package footprint, while the LT3756EUD-1#PBF accommodates higher input voltage systems and provides expanded topology flexibility within the same frequency and dimming control specifications.

Frequently Asked Questions (FAQ)

Q: Can the LT3756EUD-1#PBF directly replace the RT8462GS in an existing design?

A: Direct replacement requires PCB layout modification due to package differences (14-SOIC vs. 16-WFQFN). Both devices share identical frequency range (100kHz to 1MHz), dimming capabilities (Analog, PWM), and thermal specifications (-40°C to 125°C). Functional compatibility exists for applications operating within the RT8462GS supply voltage range (4.5V to 36V).

Q: What are the key differences between these two LED driver controllers?

A: The LT3756EUD-1#PBF supports additional topologies (Flyback and SEPIC) beyond the Buck and Boost options available in the RT8462GS. The LT3756EUD-1#PBF also accommodates higher input voltages (up to 100V vs. 36V maximum) and features improved moisture sensitivity (MSL 1 unlimited vs. MSL 3 at 168 hours).

Q: Are both parts suitable for backlight applications?

A: The RT8462GS is specified for both backlight and lighting applications. The LT3756EUD-1#PBF is specified for lighting applications. Functional compatibility for backlight use depends on application-specific voltage and topology requirements.

Q: What compliance certifications apply to both parts?

A: Both the RT8462GS and LT3756EUD-1#PBF are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component use in regulated markets.

Q: How do the package differences affect circuit design?

A: The RT8462GS uses a 14-SOIC package (0.154" width, 3.90mm), while the LT3756EUD-1#PBF uses a 16-WFQFN package (3x3mm with exposed pad). Package selection impacts PCB layout, thermal management approach, and board space allocation. The QFN package typically offers improved thermal performance through the exposed pad.