RT7302GS LED Driver IC - Equivalent & Substitute Parts

Part Overview

The RT7302GS is an AC DC offline switcher LED driver IC manufactured by Richtek USA Inc., designed for single-output PWM dimming applications. This active product operates across a 12V to 25V supply range and is housed in an 8-SOIC package. The RT7302GS serves as a primary component in offline LED lighting power management circuits where flyback, step-down, and step-up topologies are required. Substitute parts are identified when equivalent electrical specifications, compliance certifications, and functional capabilities align with the original design parameters.

Substiute Parts

RT7302GS

Richtek USA Inc.In Stock: 8548RT7302GS Datasheet

Current PartRFQ

MP4027GJ-Z

Monolithic Power Systems Inc.In Stock: 36443MP4027GJ-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT7302GS are identified based on the following critical parameters that determine functional equivalence:

• Type & Topology: AC DC offline switcher with flyback capability
• Output Configuration: Single output
• Supply Voltage Range: Minimum 12V, maximum 25V or higher
• Dimming Method: PWM dimming support
• Operating Temperature Range: -40°C to 125°C or equivalent
• Mounting & Package: Surface mount, 8-pin configuration
• Compliance: ROHS3 compliant, REACH unaffected

The MP4027GJ-Z meets these substitution criteria with compatible electrical specifications and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the RT7302GS and MP4027GJ-Z are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

The RT7302GS operates within a 12V to 25V supply range in an 8-SOIC package with MSL 3 rating. The MP4027GJ-Z provides an extended supply voltage maximum of 28V in a SOT-23-8 package with superior MSL 1 rating, indicating lower moisture sensitivity and extended shelf life without baking requirements.

Package geometry differs between the two parts: the RT7302GS uses 8-SOIC (0.154" width) while the MP4027GJ-Z uses SOT-23-8 (TSOT-23-8). PCB layout and footprint modifications are required when transitioning between these packages. The MP4027GJ-Z topology is limited to flyback operation, whereas the RT7302GS supports flyback, step-down, and step-up topologies. Design verification is necessary to confirm that flyback-only operation meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can the MP4027GJ-Z directly replace the RT7302GS without PCB modifications?

A: No. The MP4027GJ-Z uses a SOT-23-8 package while the RT7302GS uses an 8-SOIC package. Different footprints require PCB layout changes. Pin-to-pin functional compatibility must be verified against the respective datasheets.

Q: What is the significance of the MSL rating difference between these parts?

A: The RT7302GS has MSL 3 (168 hours), requiring baking before reflow if exposed to moisture for extended periods. The MP4027GJ-Z has MSL 1 (unlimited), eliminating moisture sensitivity concerns and reducing handling requirements during manufacturing.

Q: Does the extended voltage range of the MP4027GJ-Z (28V max vs. 25V max) affect compatibility?

A: The MP4027GJ-Z supports a higher maximum supply voltage (28V vs. 25V). If the application operates at or below 25V, this difference does not affect functionality. Applications requiring operation above 25V may benefit from the MP4027GJ-Z's extended range.

Q: Why does the RT7302GS support multiple topologies while the MP4027GJ-Z supports only flyback?

A: The RT7302GS integrates flyback, step-down, and step-up topology support within a single IC. The MP4027GJ-Z is optimized for flyback topology. Design confirmation is required to ensure that flyback-only operation satisfies the application's power conversion requirements.

Q: Are both parts suitable for LED lighting applications?

A: Yes. Both the RT7302GS and MP4027GJ-Z are AC DC offline switcher LED driver ICs with PWM dimming capability, designed for single-output LED lighting power management. The MP4027GJ-Z explicitly lists lighting as an application.