BD8381AEFV-ME2 Equivalent & Substitute Parts

Part Overview

The BD8381AEFV-ME2 is an LED Driver IC manufactured by Rohm Semiconductor, classified as a Power Management (PMIC) device. This single-output DC DC controller supports both step-down (buck) and step-up (boost) topologies with PWM dimming capability, operating across a 5V to 30V supply range. The device is housed in a 28-HTSSOP package with an exposed pad and is rated for automotive-grade applications with an operating temperature range of -40°C to 125°C. As an active product with ROHS3 compliance and REACH unaffected status, substitute parts may be required due to inventory constraints, design optimization, or application-specific performance requirements.

Substiute Parts

BD8381AEFV-ME2

Rohm SemiconductorIn Stock: 3625BD8381AEFV-ME2 Datasheet

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LT3761IMSE-1#PBF

Analog Devices Inc.In Stock: 1304LT3761IMSE-1#PBF Datasheet

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RT8485GS

Richtek USA Inc.In Stock: 1205RT8485GS Datasheet

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RT8496GS

Richtek USA Inc.In Stock: 1232RT8496GS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BD8381AEFV-ME2 are qualified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Type: DC DC Controller
• Topology: Step-Down (Buck), Step-Up (Boost) capability
• Number of Outputs: 1
• Dimming Support: PWM or Analog/PWM
• Operating Temperature Range: -40°C ~ 125°C minimum
• Surface Mount capability
• ROHS3 Compliance and REACH Unaffected status

Secondary Compatibility Factors:

• Supply voltage range overlap with 5V to 30V specification
• Frequency operation within acceptable range for LED driver applications
• Package compatibility for surface mount assembly

The three identified substitute parts (LT3761IMSE-1#PBF, RT8485GS, RT8496GS) meet these core criteria while offering variations in package form factor, supply voltage range, and frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the BD8381AEFV-ME2. Selection among the three substitutes depends on specific design constraints:

LT3761IMSE-1#PBF offers extended supply voltage range (4.5V to 60V) and superior moisture sensitivity performance (MSL 1 vs. MSL 3), making it suitable for applications requiring higher input voltage tolerance or stringent moisture handling requirements. The 16-MSOP package is smaller than the original 28-HTSSOP, requiring PCB layout redesign.

RT8485GS and RT8496GS provide comparable supply voltage ranges (4.5V to 36V) with identical 14-SOIC package form factors. Both support analog and PWM dimming modes, offering greater flexibility than the PWM-only BD8381AEFV-ME2. These parts maintain MSL 3 rating consistent with the original device. RT8485GS specifies frequency operation at 100kHz to 1MHz, while RT8496GS does not specify frequency parameters.

Package compatibility requires careful consideration: the 28-HTSSOP original device cannot be directly replaced without PCB modifications when substituting with 16-MSOP or 14-SOIC alternatives.

Frequently Asked Questions (FAQ)

Q: Can LT3761IMSE-1#PBF be used as a direct pin-for-pin replacement for BD8381AEFV-ME2?

A: No. While both are single-output DC DC controllers with step-down and step-up topologies, the LT3761IMSE-1#PBF uses a 16-MSOP package compared to the 28-HTSSOP of the BD8381AEFV-ME2. Pin count and layout differ, requiring schematic and PCB redesign.

Q: What is the key difference between RT8485GS and RT8496GS?

A: Both devices share identical package, supply voltage range, and operating temperature specifications. RT8485GS specifies a frequency range of 100kHz to 1MHz, while RT8496GS does not provide frequency specifications. Both support analog and PWM dimming modes.

Q: Is the LT3761IMSE-1#PBF suitable for automotive applications?

A: The LT3761IMSE-1#PBF is classified as a general Power Management (PMIC) device without automotive-grade designation. The BD8381AEFV-ME2 carries automotive-grade qualification. If automotive compliance is required, RT8485GS or RT8496GS should be evaluated for automotive suitability based on application requirements.

Q: What does MSL 3 (168 Hours) mean compared to MSL 1 (Unlimited)?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. MSL 3 allows 168 hours of exposure, while MSL 1 has unlimited exposure time. LT3761IMSE-1#PBF with MSL 1 offers superior moisture tolerance for storage and handling.

Q: Can these substitutes handle the same supply voltage as the BD8381AEFV-ME2?

A: The BD8381AEFV-ME2 operates from 5V to 30V. LT3761IMSE-1#PBF extends this to 4.5V to 60V. RT8485GS and RT8496GS operate from 4.5V to 36V. All three substitutes support the 5V to 30V range of the original device, with LT3761IMSE-1#PBF offering additional headroom for higher input voltages.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. BD8381AEFV-ME2, LT3761IMSE-1#PBF, RT8485GS, and RT8496GS are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.