BD18342FV-ME2 Equivalent & Substitute Parts

Part Overview

The BD18342FV-ME2 is an LED Driver IC manufactured by Rohm Semiconductor, classified as a Power Management PMIC. This device functions as a 1-output DC DC controller with PWM dimming capability, housed in a 16-LSSOP surface mount package. The part is active in production status and carries automotive-grade qualification (AEC-Q100), making it suitable for demanding automotive lighting applications. Substitute parts are identified when equivalent electrical parameters, package compatibility, and operational specifications align with the original component, enabling seamless integration in existing designs.

Key Parameters

Parameter	Value
Manufacturer	Rohm Semiconductor
Part Number	BD18342FV-ME2
Category	Power Management (PMIC)
Type	DC DC Controller
Number of Outputs	1
Voltage Supply Range	4.5V to 19V
Frequency	100Hz to 5kHz
Dimming	PWM
Package / Case	16-LSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C to 125°C (TA)
Grade	Automotive
Qualification	AEC-Q100
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BD18342FV-ME2 are classified into two categories based on parametric alignment:

Parametric Equivalents (BD18341FV-ME2, BD18343FV-ME2): These Rohm Semiconductor parts share identical electrical specifications with the main part, including supply voltage range (4.5V–19V), frequency range (100Hz–5kHz), PWM dimming capability, package type (16-LSSOP), operating temperature range (-40°C to 125°C), automotive grade, AEC-Q100 qualification, and RoHS3 compliance. These parts are direct functional replacements within the same product family.

Similar Part (LM3423MHX/NOPB): This Texas Instruments device operates within the same supply voltage range (4.5V–75V upper limit) and shares the same operating temperature range, automotive-grade status, and RoHS3 compliance. However, it differs in package type (20-PowerTSSOP vs. 16-LSSOP), frequency specification (2MHz vs. 100Hz–5kHz), and topology (SEPIC, Step-Down, Step-Up vs. standard DC DC controller). This part requires PCB layout redesign due to package differences.

Parameter Comparison

Parameter	BD18342FV-ME2	BD18341FV-ME2	BD18343FV-ME2	LM3423MHX/NOPB
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)
Type	DC DC Controller	DC DC Controller	DC DC Controller	DC DC Controller
Number of Outputs	1	1	1	1
Voltage Supply (Min)	4.5V	4.5V	4.5V	4.5V
Voltage Supply (Max)	19V	19V	19V	75V
Frequency	100Hz–5kHz	100Hz–5kHz	100Hz–5kHz	2MHz
Dimming	PWM	PWM	PWM	Analog, PWM
Package / Case	16-LSSOP	16-LSSOP	16-LSSOP	20-PowerTSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C to 125°C (TA)	-40°C to 125°C (TA)	-40°C to 125°C (TA)	-40°C to 125°C (TJ)
Grade	Automotive	Automotive	Automotive	Not specified
Qualification	AEC-Q100	AEC-Q100	AEC-Q100	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): BD18341FV-ME2 and BD18343FV-ME2 are recommended as primary substitutes. Both parts maintain identical package geometry (16-LSSOP), electrical specifications, operating temperature range, and automotive-grade AEC-Q100 qualification. These parts can be substituted without PCB layout modifications or firmware adjustments.

For Extended Supply Voltage Applications: LM3423MHX/NOPB supports a higher maximum supply voltage (75V vs. 19V) and operates at higher frequency (2MHz). This part is suitable only when design requirements permit package redesign from 16-LSSOP to 20-PowerTSSOP. Automotive-grade and AEC-Q100 qualification status are not specified for this part; verification against project requirements is necessary.

Inventory Considerations: BD18342FV-ME2 maintains 3505 units in stock, BD18343FV-ME2 has 3214 units, BD18341FV-ME2 has 1350 units, and LM3423MHX/NOPB has 9700 units available.

Frequently Asked Questions (FAQ)

Q: Can BD18341FV-ME2 and BD18343FV-ME2 be used interchangeably with BD18342FV-ME2?

A: Yes. All three parts share identical electrical parameters (4.5V–19V supply, 100Hz–5kHz frequency, PWM dimming), package type (16-LSSOP), operating temperature range (-40°C to 125°C), and automotive qualifications (AEC-Q100). No design modifications are required.

Q: What are the key differences between the Rohm parts and LM3423MHX/NOPB?

A: The LM3423MHX/NOPB differs in three areas: package type (20-PowerTSSOP vs. 16-LSSOP), frequency specification (2MHz vs. 100Hz–5kHz), and maximum supply voltage (75V vs. 19V). PCB layout redesign is required for this substitution.

Q: Is LM3423MHX/NOPB suitable for automotive applications?

A: Automotive-grade and AEC-Q100 qualification status are not specified in the provided data for LM3423MHX/NOPB. Verification against project automotive requirements is necessary before selection.

Q: What is the significance of the 16-LSSOP package specification?

A: The 16-LSSOP package defines the physical footprint and pin configuration. BD18341FV-ME2 and BD18343FV-ME2 maintain this identical package, enabling direct PCB substitution. LM3423MHX/NOPB uses a different 20-PowerTSSOP package, requiring PCB redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BD18341FV-ME2, BD18343FV-ME2, and LM3423MHX/NOPB are all ROHS3 compliant, matching the original BD18342FV-ME2 specification.

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