RT7310GE LED Driver IC - Equivalent & Substitute Parts

Part Overview

The RT7310GE is an AC DC offline switcher LED driver IC manufactured by Richtek USA Inc., designed for single-output applications with Triac dimming capability. This device supports multiple topologies including Flyback, Step-Down (Buck), and Step-Up (Boost) configurations, operating across a 12V to 25V supply range. The part is currently active in production with RoHS3 compliance and is available in SOT-23-6 surface mount packaging. Alternative models are identified to provide design flexibility, accommodate supply chain variations, and support different packaging or performance requirements within the LED driver IC category.

Substiute Parts

RT7310GE

Richtek USA Inc.In Stock: 35468RT7310GE Datasheet

Current PartRFQ

AL1692S-13

Diodes IncorporatedIn Stock: 120128AL1692S-13 Datasheet

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HV9925SG-G

Microchip TechnologyIn Stock: 2036HV9925SG-G Datasheet

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LM3444MM/NOPB

Texas InstrumentsIn Stock: 1364LM3444MM/NOPB Datasheet

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NCL30186DDR2G

onsemiIn Stock: 7224NCL30186DDR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT7310GE is determined by the following core parameters:

• Device Type: AC DC Offline Switcher LED Driver IC with single output
• Topology Support: Flyback, Step-Down (Buck), Step-Up (Boost) capability
• Dimming Method: Triac dimming control
• Supply Voltage Range: Minimum 12V to maximum 25V operation
• Mounting: Surface mount technology
• Compliance: RoHS3 compliance required

The identified substitute parts maintain functional equivalence within the LED driver IC category while accommodating variations in packaging format, supply voltage operating ranges, dimming methods, and internal switch configurations. All substitutes are active products with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and RoHS3 compliance, meeting baseline regulatory and supply chain requirements.

AL1692S-13 (Diodes Incorporated): Closest functional alignment with RT7310GE. Supports identical topologies (Flyback, Buck, Boost) and Triac dimming. Supply voltage range 8.5V to 20V overlaps the RT7310GE operating window. Package format differs (8-SOIC vs. SOT-23-6), requiring PCB layout modification. Operating temperature extends to 105°C. MSL rating improves to 1 (Unlimited).

HV9925SG-G (Microchip Technology): Supports Buck topology with internal switch and PWM dimming. Supply voltage range 20V to 400V exceeds RT7310GE minimum requirement. Topology and dimming method differ from primary part. Suitable for applications requiring higher supply voltage tolerance and PWM control. 8-SOIC package with exposed pad.

LM3444MM/NOPB (Texas Instruments): Buck topology with Analog dimming. Supply voltage range 8V to 13V is narrower than RT7310GE. Operating temperature extends to 125°C. Package format is 10-VSSOP, requiring significant PCB redesign. Topology and dimming method differ substantially.

NCL30186DDR2G (onsemi): Broadest topology support (Flyback, SEPIC, Buck, Boost) with dual dimming capability (Analog and PWM). Supply voltage range 8.8V to 25.5V encompasses RT7310GE operating window. Operating temperature extends to 125°C. 10-SOIC package requires PCB layout modification. Highest design flexibility among substitutes.

Frequently Asked Questions (FAQ)

Q: Can AL1692S-13 directly replace RT7310GE on the same PCB?

A: No. While AL1692S-13 provides functional equivalence in topology and dimming method, the package format differs (8-SOIC vs. SOT-23-6). PCB layout and footprint redesign is required. Pin configuration must be verified against application schematic.

Q: What is the primary difference between HV9925SG-G and RT7310GE?

A: HV9925SG-G uses PWM dimming and includes an internal switch, whereas RT7310GE uses Triac dimming without internal switch. HV9925SG-G operates across a higher supply voltage range (20V to 400V). These differences affect circuit topology and dimming control implementation.

Q: Is LM3444MM/NOPB suitable for applications requiring Triac dimming?

A: No. LM3444MM/NOPB supports Analog dimming only. Triac dimming control is not available. Application requirements must be evaluated before selection.

Q: Which substitute offers the widest operating temperature range?

A: Both LM3444MM/NOPB and NCL30186DDR2G operate to 125°C, compared to RT7310GE at 85°C. Temperature rating selection depends on thermal environment specifications.

Q: Does NCL30186DDR2G support Triac dimming?

A: NCL30186DDR2G supports Analog and PWM dimming methods. Triac dimming is not specified. Application dimming control requirements must be confirmed.

Q: What packaging considerations apply when selecting a substitute?

A: RT7310GE uses SOT-23-6 (6-pin). Substitutes use 8-SOIC, 10-VSSOP, or 10-SOIC packages. Each package format requires different PCB footprints, trace routing, and thermal management approaches. Pin count and pinout must be verified against application requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitutes maintain RoHS3 compliance, meeting regulatory requirements equivalent to RT7310GE.

Q: Which substitute has the best moisture sensitivity rating?

A: AL1692S-13, HV9925SG-G, LM3444MM/NOPB, and NCL30186DDR2G all have MSL rating 1 (Unlimited), compared to RT7310GE at MSL 3 (168 Hours). Lower MSL ratings indicate reduced moisture sensitivity and extended shelf life.