MP3393EF-LF LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The MP3393EF-LF is an active LED driver controller IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring multi-channel PWM dimming control. This Surface Mount device operates as a DC-DC Step-Up (Boost) controller with 8 output channels and is currently in active production status. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameter ranges for this product category.

Substiute Parts

MP3393EF-LF

Monolithic Power Systems Inc.In Stock: 847MP3393EF-LF Datasheet

Current PartRFQ

BD9479FV-GE2

Rohm SemiconductorIn Stock: 45311BD9479FV-GE2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3393EF-LF are qualified based on the following critical parameters that determine functional equivalence:

• Topology Match: Step-Up (Boost) DC-DC controller architecture
• Output Channels: 8-channel configuration
• Supply Voltage Range: Minimum 9V input capability with maximum rating of 32V or higher
• Dimming Control: Analog and PWM dimming support
• Application Suitability: Backlight driver functionality
• Product Status: Active manufacturing status
• Compliance: ROHS3 and REACH compliance maintained
• Mounting: Surface Mount technology

The BD9479FV-GE2 meets these substitution criteria across all functional parameters while operating within the allowed electrical specifications for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the MP3393EF-LF and BD9479FV-GE2 maintain active product status with ROHS3 and REACH compliance. Selection between these parts is determined by specific application constraints:

The MP3393EF-LF operates across a wider junction temperature range (-40°C to 125°C TJ) compared to the BD9479FV-GE2 (-40°C to 85°C TA). The MP3393EF-LF features a more compact 28-TSSOP package footprint, while the BD9479FV-GE2 uses a 40-SSOP package with increased pin count. The BD9479FV-GE2 provides higher maximum supply voltage rating (35V versus 32V) and superior moisture resistance (MSL 1 Unlimited versus MSL 2A 4 Weeks). Both devices support identical 8-channel output configuration, Analog and PWM dimming control, and backlight application requirements.

Frequently Asked Questions (FAQ)

Q: Can the BD9479FV-GE2 directly replace the MP3393EF-LF on existing PCBs?

A: Direct PCB replacement is not possible due to package differences. The MP3393EF-LF uses 28-TSSOP packaging while the BD9479FV-GE2 uses 40-SSOP packaging. PCB layout redesign is required to accommodate the different pin count and footprint dimensions.

Q: What are the key functional equivalencies between these parts?

A: Both devices share identical topology (Step-Up Boost), output channel count (8), input voltage minimum (9V), dimming control methods (Analog and PWM), and backlight application suitability. Both maintain active production status and ROHS3 compliance.

Q: Are there temperature operating range differences that affect substitution?

A: Yes. The MP3393EF-LF operates to 125°C junction temperature while the BD9479FV-GE2 operates to 85°C ambient temperature. Applications requiring operation above 85°C ambient or 125°C junction temperature must use the MP3393EF-LF.

Q: How do the switching frequencies compare?

A: The MP3393EF-LF operates at 140 kHz while the BD9479FV-GE2 operates at 150 kHz. Both frequencies fall within standard switching ranges for LED driver applications and do not prevent functional substitution.

Q: What is the significance of the moisture sensitivity level difference?

A: The MP3393EF-LF has MSL 2A (4 weeks floor life) while the BD9479FV-GE2 has MSL 1 (unlimited floor life). The BD9479FV-GE2 provides greater flexibility in storage and handling without moisture bake-out requirements.

Q: Do both parts support the same supply voltage range?

A: Both support minimum 9V input. The MP3393EF-LF maximum is 32V while the BD9479FV-GE2 maximum is 35V. Applications operating at 32V to 35V require the BD9479FV-GE2.