FL6300AMY LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The FL6300AMY is an LED driver controller IC manufactured by onsemi, designed for flyback topology DC-DC conversion applications in lighting systems. This 8-SOIC surface mount device operates across a 10V to 25V supply range with PWM dimming capability. The part is currently obsolete, making equivalent substitutes necessary for new designs, maintenance, and production continuity. Suitable alternatives must maintain compatibility with the flyback topology, PWM dimming functionality, and 8-SOIC packaging while meeting the electrical operating parameters of the original design.

Substiute Parts

FL6300AMY

onsemiIn Stock: 3644FL6300AMY Datasheet

Current PartRFQ

FAN6300AMY

onsemiIn Stock: 90289FAN6300AMY Datasheet

DirectRFQ

LT3755EMSE-2#PBF

Analog Devices Inc.In Stock: 4280LT3755EMSE-2#PBF Datasheet

SimilarRFQ

LT3756IUD-2#TRPBF

Analog Devices Inc.In Stock: 2327LT3756IUD-2#TRPBF Datasheet

SimilarRFQ

LT8391EUFD#TRPBF

Analog Devices Inc.In Stock: 978LT8391EUFD#TRPBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FL6300AMY is determined by the following critical parameters:

Primary Compatibility Criteria:

• Topology: Flyback DC-DC controller architecture
• Dimming Control: PWM capability for LED brightness modulation
• Package: 8-SOIC surface mount form factor
• Supply Voltage Range: Minimum 10V to maximum 25V operation
• Single Output Configuration
• Operating Temperature Range: -40°C to 125°C minimum

Substitution Categories:

Direct Substitute (Pin-Compatible, Same Package):

• FAN6300AMY (onsemi) - Identical 8-SOIC package, flyback topology, operates within 8V-25V supply range, includes PWM-compatible control features

Functional Equivalents (Different Package, Expanded Capability):

• LT3755EMSE-2#PBF (Analog Devices) - Multi-topology controller (Flyback, SEPIC, Buck, Boost), PWM dimming, 16-MSOP package, 4.5V-40V supply range
• LT3756IUD-2#TRPBF (Analog Devices) - Multi-topology controller (Flyback, SEPIC, Buck, Boost), PWM dimming, 16-QFN package, 6V-100V supply range
• LT8391EUFD#TRPBF (Analog Devices) - Buck-Boost topology, PWM dimming, 28-QFN package, 4V-60V supply range, automotive grade

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same PCB Layout): FAN6300AMY is the primary substitute for FL6300AMY. Both devices share the 8-SOIC package and flyback topology. FAN6300AMY is currently in active production status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The supply voltage range (8V-25V) encompasses the original specification (10V-25V). Note that FAN6300AMY operates to 105°C maximum junction temperature versus the original 125°C; verify thermal requirements for your application.

For Design Flexibility (PCB Redesign Acceptable): LT3755EMSE-2#PBF, LT3756IUD-2#TRPBF, and LT8391EUFD#TRPBF offer expanded topology support and wider supply voltage ranges. These alternatives require PCB layout modifications due to different package formats (16-MSOP-EP, 16-QFN, and 28-QFN respectively) but provide enhanced design flexibility. All three are active products with ROHS3 compliance and full -40°C to 125°C operating temperature ranges.

LT3756IUD-2#TRPBF maintains flyback topology compatibility while supporting additional topologies (SEPIC, Buck, Boost), making it suitable for applications requiring topology flexibility. LT8391EUFD#TRPBF includes automotive-grade qualification, appropriate for automotive lighting applications.

Compliance Considerations: All substitute parts maintain REACH Unaffected status and MSL Level 1 (Unlimited) moisture sensitivity, matching the original part's environmental compliance profile. ROHS3 compliance is confirmed for all active alternatives.

Frequently Asked Questions (FAQ)

Q: Can FAN6300AMY be used as a direct drop-in replacement for FL6300AMY? A: FAN6300AMY shares the 8-SOIC package and flyback topology with FL6300AMY, enabling direct PCB placement. However, verify that the lower maximum operating temperature (105°C vs. 125°C) and specific control feature differences are acceptable for your thermal and functional requirements.

Q: What is the primary difference between FAN6300AMY and the Analog Devices alternatives? A: FAN6300AMY maintains the original 8-SOIC package and single-topology (flyback) architecture. The Analog Devices parts (LT3755, LT3756, LT8391) offer multi-topology support and wider supply voltage ranges but require different package footprints (16-MSOP-EP, 16-QFN, 28-QFN). Package selection depends on PCB redesign feasibility and topology requirements.

Q: Are all substitute parts suitable for LED lighting applications? A: Yes. FL6300AMY, FAN6300AMY, LT3755EMSE-2#PBF, and LT3756IUD-2#TRPBF are explicitly specified for lighting applications. LT8391EUFD#TRPBF includes automotive-grade qualification and is suitable for automotive lighting systems.

Q: What supply voltage range must I verify when selecting a substitute? A: The original FL6300AMY operates from 10V to 25V. FAN6300AMY operates from 8V to 25V (compatible). The Analog Devices alternatives support wider ranges: LT3755 (4.5V-40V), LT3756 (6V-100V), and LT8391 (4V-60V). Confirm your application's supply voltage falls within the selected substitute's operating range.

Q: Does PWM dimming functionality differ between these parts? A: FL6300AMY and FAN6300AMY support PWM dimming. The Analog Devices alternatives (LT3755, LT3756, LT8391) support both analog and PWM dimming, providing additional control flexibility. Verify your dimming control circuit compatibility with the selected part.

Q: What packaging considerations apply when switching from FL6300AMY? A: FAN6300AMY uses the same 8-SOIC package, requiring no PCB layout changes. LT3755EMSE-2#PBF uses 16-MSOP-EP, LT3756IUD-2#TRPBF uses 16-QFN (3x3), and LT8391EUFD#TRPBF uses 28-QFN (4x5). Different packages require PCB redesign and may affect board space allocation.

Q: Are all substitutes RoHS compliant? A: FAN6300AMY and all Analog Devices alternatives are ROHS3 compliant. The original FL6300AMY RoHS status is not specified in the provided data.