BD9409F-E2 LED Driver Controller: Equivalent & Substitute Parts

Part Overview

The BD9409F-E2 is an active LED driver IC manufactured by Rohm Semiconductor, designed as a PWM-controlled DC-DC controller for step-up (boost) topology applications. This 16-SOP surface mount component operates across a 11.5V to 35V supply range with 150kHz switching frequency and supports analog and PWM dimming for backlight applications. The part is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and is currently in active production status with 3506 units in stock.

Substitute parts are identified when equivalent LED driver controller functionality can be achieved through alternative topologies, supply voltage ranges, or package configurations while maintaining core dimming and control capabilities.

Substiute Parts

BD9409F-E2

Rohm SemiconductorIn Stock: 3554BD9409F-E2 Datasheet

Current PartRFQ

HV9910CNG-G

Microchip TechnologyIn Stock: 3251HV9910CNG-G Datasheet

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LT3756IUD-2#PBF

Analog Devices Inc.In Stock: 2313LT3756IUD-2#PBF Datasheet

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LT3796IFE-1#PBF

Analog Devices Inc.In Stock: 2873LT3796IFE-1#PBF Datasheet

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LT3922IUFD#PBF

Analog Devices Inc.In Stock: 1545LT3922IUFD#PBF Datasheet

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MAX20090ATP/V+

Analog Devices Inc./Maxim IntegratedIn Stock: 2132MAX20090ATP/V+ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BD9409F-E2 is determined by the following criteria:

Primary Substitution Criteria:

• Single output LED driver controller functionality
• Analog and PWM dimming capability
• Surface mount package configuration
• RoHS3 compliance and MSL 1 rating
• Active product status

Topology Flexibility: Substitutes may employ alternative topologies (step-down, SEPIC, flyback, or multi-topology) provided they support the required dimming methods and output control for LED applications.

Supply Voltage Compatibility: Substitute parts must accommodate the 11.5V minimum supply requirement. Parts with extended upper voltage limits (up to 450V) remain compatible for applications within the BD9409F-E2 operating range.

Frequency and Thermal Range: Switching frequency variation is acceptable. Operating temperature ranges of -40°C to 125°C exceed the BD9409F-E2 specification and provide enhanced thermal margin.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and full RoHS3 compliance with MSL 1 ratings, ensuring equivalent environmental and regulatory qualification to the BD9409F-E2.

HV9910CNG-G (Microchip Technology): Operates at higher minimum supply voltage (15V) and employs step-down topology. Suitable for applications where input voltage exceeds 15V and buck conversion is acceptable. Frequency options of 25kHz and 100kHz provide flexibility for noise-sensitive applications.

LT3756IUD-2#PBF (Analog Devices Inc.): Multi-topology controller supporting flyback, SEPIC, buck, and boost configurations. Extended frequency range (100kHz to 1MHz) and 6V minimum supply enable broader application flexibility. 16-QFN package offers reduced footprint compared to 16-SOIC.

LT3796IFE-1#PBF (Analog Devices Inc.): SEPIC, buck, and boost capable with 6V minimum supply and 100V output rating. 28-TSSOP package provides additional pin count for enhanced control features. Frequency range of 100kHz to 1MHz supports diverse switching requirements.

LT3922IUFD#PBF (Analog Devices Inc.): Boost topology with lowest minimum supply voltage (2.8V) and integrated 2.3A output current capability. Automotive grade qualification (AEC-Q100) and extended frequency range (200kHz to 2MHz) suit demanding lighting applications. 28-QFN package accommodates higher integration.

MAX20090ATP/V+ (Analog Devices Inc./Maxim Integrated): Multi-topology controller with automotive qualification (AEC-Q100) and 65V maximum supply. 20-TQFN package balances pin count and footprint. Frequency range of 200kHz to 2MHz and 5V minimum supply provide broad compatibility.

Frequently Asked Questions (FAQ)

Q: Can HV9910CNG-G replace BD9409F-E2 in a 12V input application? A: HV9910CNG-G requires minimum 15V supply, making it unsuitable for 12V input systems. The step-down topology also differs from the boost requirement of BD9409F-E2.

Q: What is the primary advantage of LT3756IUD-2#PBF over BD9409F-E2? A: LT3756IUD-2#PBF supports multiple topologies (flyback, SEPIC, buck, boost) with extended frequency range (100kHz to 1MHz) and lower 6V minimum supply. The 16-QFN package reduces PCB area compared to 16-SOIC.

Q: Is LT3922IUFD#PBF suitable for automotive applications? A: Yes. LT3922IUFD#PBF carries automotive grade qualification and AEC-Q100 certification, making it appropriate for automotive lighting systems requiring enhanced reliability.

Q: How do package differences affect substitution? A: Package selection depends on PCB layout constraints and pin accessibility. 16-SOIC and 16-QFN packages are comparable in functionality but differ in footprint and thermal characteristics. 20-TQFN and 28-TSSOP/QFN packages provide additional pins for enhanced control but require larger board area.

Q: Are all substitutes compatible with PWM dimming? A: Yes. All identified substitutes support both analog and PWM dimming control methods, maintaining functional equivalence to BD9409F-E2 for dimming applications.

Q: What is the temperature operating range difference? A: BD9409F-E2 operates to 105°C maximum. All substitutes extend to 125°C, providing 20°C additional thermal margin for high-temperature environments.

Q: Can MAX20090ATP/V+ operate at BD9409F-E2 supply voltages? A: Yes. MAX20090ATP/V+ minimum supply is 5V and maximum is 65V, fully encompassing the BD9409F-E2 range of 11.5V to 35V.