RT9288AGE LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The RT9288AGE is an active LED driver controller IC manufactured by Richtek USA Inc., designed for step-up (boost) topology applications in backlight systems. This single-output DC-DC controller operates at 1MHz with PWM dimming capability and supports supply voltages from 3V to 14.6V. The device is housed in a compact SOT-23-6 surface mount package and maintains full RoHS3 compliance with REACH unaffected status.

Substitute parts become necessary when the RT9288AGE reaches end-of-life status, inventory constraints occur, or alternative topologies and package configurations better suit specific application requirements while maintaining functional equivalence in LED driver control.

Substiute Parts

RT9288AGE

Richtek USA Inc.In Stock: 22901RT9288AGE Datasheet

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BD9486F-GE2

Rohm SemiconductorIn Stock: 26181BD9486F-GE2 Datasheet

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HV9861ANG-G

Microchip TechnologyIn Stock: 5078HV9861ANG-G Datasheet

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HVLED001ATR

STMicroelectronicsIn Stock: 25400HVLED001ATR Datasheet

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IRS25411STRPBF

Infineon TechnologiesIn Stock: 30236IRS25411STRPBF Datasheet

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LT3791EFE#PBF

Analog Devices Inc.In Stock: 2337LT3791EFE#PBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT9288AGE is determined by the following critical parameters:

Primary Substitution Criteria:

• Single output LED driver controller functionality
• DC-DC controller type with active product status
• PWM dimming capability
• RoHS3 compliance and REACH unaffected status
• Surface mount technology

Topology Considerations: The RT9288AGE uses step-up (boost) topology. Substitute parts may employ alternative topologies (step-down/buck, flyback, SEPIC, or multi-topology) provided they maintain single-output LED driver control and PWM dimming functionality. Topology differences require circuit redesign but do not disqualify functional equivalence.

Voltage Supply Range: The RT9288AGE operates within 3V to 14.6V. Substitute parts with overlapping or extended supply ranges are acceptable. Parts with non-overlapping ranges require external conditioning circuits.

Package Differences: The RT9288AGE uses SOT-23-6 (6-pin small outline). Substitute parts in larger packages (8-SOIC, 10-SSOP, 16-SOIC, 16-SOP, 38-TSSOP) require PCB layout redesign but maintain functional compatibility.

Frequency and Thermal Ratings: Operating frequency and temperature ranges vary among substitutes. These parameters must be evaluated against specific application requirements but do not prevent substitution.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full RoHS3 compliance with REACH unaffected designation, meeting baseline regulatory requirements equivalent to the RT9288AGE.

BD9486F-GE2 (Rohm Semiconductor): Maintains identical boost topology and operating temperature range. Supply voltage range (9V-18V) overlaps the upper portion of RT9288AGE specifications. MSL rating of 1 (Unlimited) provides superior moisture handling compared to the original part's MSL 3 rating. 16-SOIC package requires PCB redesign. Suitable for applications where lower input voltage (below 9V) is not required.

HV9861ANG-G (Microchip Technology): Employs step-down (buck) topology, requiring circuit redesign. Extended supply range (15V-450V) and operating temperature to 125°C support high-voltage applications beyond RT9288AGE capability. MSL 1 rating and 16-SOIC package. Applicable only when buck topology is acceptable and input voltage exceeds 15V.

HVLED001ATR (STMicroelectronics): Multi-topology device supporting flyback, SEPIC, buck, and boost configurations. Supply range (8.8V-16.5V) partially overlaps RT9288AGE. Extended operating temperature to 125°C. MSL 3 rating matches original part. 10-SSOP package. Provides topology flexibility for applications requiring alternative converter architectures.

IRS25411STRPBF (Infineon Technologies): Step-down (buck) topology with 500kHz switching frequency. Supply range (8V-16.6V) overlaps upper RT9288AGE range. Operating temperature extends to 125°C. MSL 2 rating. 8-SOIC package. Suitable for buck-topology applications with input voltage above 8V.

LT3791EFE#PBF (Analog Devices Inc.): Dual-topology device supporting both buck and boost configurations. Widest supply range (4.7V-60V) encompasses full RT9288AGE operating window and extends significantly beyond. Output voltage programmable to 60V. Extended operating temperature to 125°C. MSL 1 rating. 38-TFSOP-EP package with exposed pad for thermal management. Highest integration and flexibility; largest package footprint.

Frequently Asked Questions (FAQ)

Q: Can I directly replace RT9288AGE with any of these substitute parts without circuit modification?

A: Direct pin-for-pin replacement is not possible due to package differences. RT9288AGE uses SOT-23-6 (6 pins), while substitutes range from 8 to 38 pins. Circuit redesign is required for all substitutions. Topology differences (boost vs. buck) also necessitate converter circuit modifications.

Q: Which substitute maintains the closest functional match to RT9288AGE?

A: BD9486F-GE2 maintains identical boost topology and similar operating temperature range (-40°C to 85°C). However, its minimum supply voltage of 9V excludes applications requiring 3V-8.9V input. For applications within the 9V-14.6V window, BD9486F-GE2 provides the most direct functional equivalence.

Q: What does MSL rating mean, and why do substitutes have different ratings?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be stored in standard conditions before moisture absorption requires baking. MSL 1 (Unlimited) allows indefinite storage. MSL 3 (168 Hours) requires baking after 168 hours of exposure. RT9288AGE and HVLED001ATR both use MSL 3, while other substitutes offer MSL 1 or 2, providing better shelf-life flexibility.

Q: Can I use LT3791EFE#PBF as a universal replacement?

A: LT3791EFE#PBF offers the widest supply range (4.7V-60V) and dual topology support, making it functionally compatible with RT9288AGE applications. However, its 38-pin package is significantly larger than SOT-23-6, requiring substantial PCB redesign. Use LT3791EFE#PBF only when its advanced features (programmable output voltage, extended range, dual topology) justify the layout complexity.

Q: What is the difference between step-up (boost) and step-down (buck) topology?

A: Step-up (boost) topology increases input voltage to produce higher output voltage, used in RT9288AGE and BD9486F-GE2. Step-down (buck) topology reduces input voltage to produce lower output voltage, used in HV9861ANG-G and IRS25411STRPBF. These topologies require different converter circuits and cannot be interchanged without complete redesign.

Q: Are all substitutes suitable for backlight applications?

A: RT9288AGE, BD9486F-GE2, and HVLED001ATR explicitly list backlight applications. HV9861ANG-G lists backlight, lighting, and signage. IRS25411STRPBF and LT3791EFE#PBF do not specify applications in provided data but are LED driver controllers suitable for lighting applications. Verify specific application compatibility through detailed datasheets.

Q: What does "REACH Unaffected" status mean?

A: REACH Unaffected indicates the component does not contain substances of very high concern (SVHC) listed under EU REACH regulations, or such substances are present below regulatory thresholds. All listed parts maintain this status, ensuring compliance with EU environmental regulations.