BD9470AFM-GE2 Equivalent & Substitute Parts

Part Overview

The BD9470AFM-GE2 is a LED Driver IC manufactured by Rohm Semiconductor, classified as a Power Management PMIC. This device functions as a 6-output DC-DC regulator with step-up (boost) topology, PWM dimming capability, and a maximum output current of 250mA per channel. The part operates across a 9V to 35V supply voltage range and is designed for backlight applications. With active product status and ROHS3 compliance, the BD9470AFM-GE2 remains in production. Equivalent and substitute parts are identified when design requirements necessitate alternative packaging, different thermal operating ranges, modified output current specifications, or supply voltage adjustments while maintaining functional compatibility for LED driver applications.

Key Parameters

Parameter	BD9470AFM-GE2
Manufacturer	Rohm Semiconductor
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	6
Voltage - Supply (Min)	9V
Voltage - Supply (Max)	35V
Current - Output / Channel	250mA
Frequency	150kHz
Dimming	PWM
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	28-SOP (0.295", 7.50mm Width) + 2 Heat Tabs
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the BD9470AFM-GE2 are grouped based on functional equivalence within the LED driver IC category. The primary substitution criteria are: (1) 6-output configuration, (2) step-up (boost) topology, (3) PWM dimming capability, (4) surface mount technology, and (5) ROHS3 compliance. Secondary considerations include supply voltage range compatibility, output current per channel, operating temperature range, and package form factor. Parts are considered substitutable when they maintain the core functional requirements of LED driver operation while accommodating variations in electrical specifications and physical packaging that may align with specific design constraints or availability conditions.

Parameter Comparison

Parameter	BD9470AFM-GE2	TPS61187RTJR	LP8552TLX-E06/NOPB	TPS61182RTET	LED7706TR	TPS61183RTJR	LT3598IFE#PBF	MIC3263YML-TR	LP8552TLX/NOPB	LP8556SQE-E09/NOPB
Manufacturer	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	Texas Instruments	Analog Devices Inc.	Microchip Technology	Texas Instruments	Texas Instruments
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Number of Outputs	6	6	6	6	6	6	6	6	6	6
Voltage - Supply (Min)	9V	4.5V	2.7V	5V	4.5V	4.5V	3V	6V	2.7V	2.7V
Voltage - Supply (Max)	35V	24V	22V	24V	36V	24V	30V	40V	22V	20V
Current - Output / Channel	250mA	30mA	450mA	25mA	30mA	30mA	30mA	30mA	450mA	50mA
Dimming	PWM	PWM	PWM	PWM	PWM	PWM	Analog, PWM	PWM	PWM	PWM
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-30°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the BD9470AFM-GE2. Selection among substitutes depends on specific design requirements:

Parts with higher output current per channel (LP8552TLX-E06/NOPB and LP8552TLX/NOPB at 450mA) are suitable for applications requiring greater LED drive capability than the BD9470AFM-GE2's 250mA specification. Parts with lower minimum supply voltage (LP8552 variants at 2.7V, LT3598IFE#PBF at 3V) accommodate designs with reduced input voltage headroom. Parts with extended operating temperature ranges (LED7706TR to 150°C, LT3598IFE#PBF and MIC3263YML-TR to 125°C) address thermal environment constraints beyond the standard -40°C to 85°C range. Package selection should align with PCB layout requirements and thermal management strategy, with consideration for exposed pad configurations in compact form factors.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the BD9470AFM-GE2?

A: A valid substitute must maintain the 6-output LED driver configuration with step-up (boost) topology and PWM dimming capability. The part must be surface mount, ROHS3 compliant, and active in production status. Electrical parameters including supply voltage range, output current, and operating temperature may vary within design tolerance.

Q: Can I use a substitute with lower output current per channel?

A: Substitutes with lower output current per channel (such as TPS61182RTET at 25mA or TPS61183RTJR at 30mA) are applicable only if your LED load current requirements do not exceed the substitute's rated specification. The BD9470AFM-GE2 provides 250mA per channel; lower-rated parts are suitable for reduced-current applications.

Q: Are there package compatibility considerations?

A: Yes. The BD9470AFM-GE2 uses a 28-HSOP package. Substitutes employ different packages including 20-QFN, 24-WQFN, 25-DSBGA, and 24-VFQFPN. PCB layout, thermal management, and assembly equipment must accommodate the selected package form factor. Exposed pad configurations in QFN and BGA packages provide enhanced thermal performance compared to standard SOP packages.

Q: Which substitutes support extended temperature operation?

A: LED7706TR operates to 150°C junction temperature, while LT3598IFE#PBF and MIC3263YML-TR operate to 125°C junction temperature. These parts are suitable for applications requiring thermal performance beyond the BD9470AFM-GE2's -40°C to 85°C ambient range.

Q: Do all substitutes support PWM dimming?

A: All listed substitutes support PWM dimming. LT3598IFE#PBF additionally supports analog dimming, providing design flexibility for applications requiring both control methods.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The BD9470AFM-GE2 carries MSL 3 (168 hours), while most substitutes carry MSL 1 (unlimited) or MSL 2 (1 year). Lower MSL ratings indicate reduced moisture sensitivity and longer shelf life without desiccant storage, simplifying supply chain and manufacturing logistics.

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