MP3398BGF LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The MP3398BGF is an active LED driver controller IC manufactured by Monolithic Power Systems Inc., designed for backlight applications. This 4-output DC-DC step-up (boost) controller operates across a 5V to 28V supply range with 350mA per-channel output capability and integrated PWM/analog dimming functionality. The device is housed in a 16-TSSOP package with exposed pad and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent functional performance is required due to inventory constraints, application-specific requirements, or design optimization needs.

Substiute Parts

MP3398BGF

Monolithic Power Systems Inc.In Stock: 1017MP3398BGF Datasheet

Current PartRFQ

LP8860AQVFPRQ1

Texas InstrumentsIn Stock: 6121LP8860AQVFPRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3398BGF is determined by the following core parameters:

• Topology: Step-Up (Boost) DC-DC controller architecture
• Number of Outputs: 4-channel configuration
• Supply Voltage Range: Minimum 5V input capability; maximum 28V input capability
• Output Current: Minimum 350mA per-channel capability
• Dimming Control: PWM and/or analog dimming support
• Operating Temperature Range: -40°C to 125°C minimum
• Package Type: Surface mount with thermal management capability
• Compliance: RoHS3 compliance required

The LP8860AQVFPRQ1 qualifies as a manufacturer-recommended substitute based on functional equivalence across these parameters, despite differences in package form factor and frequency range.

Parameter Comparison

Engineering Selection Recommendations

Both the MP3398BGF and LP8860AQVFPRQ1 maintain active product status with full RoHS3 compliance and REACH unaffected designation. The LP8860AQVFPRQ1 carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications where the main part does not specify automotive qualification.

Selection between these parts should account for the following provided specifications:

• The LP8860AQVFPRQ1 supports a wider supply voltage range (3V to 48V) compared to the MP3398BGF (5V to 28V), providing greater input flexibility.
• The MP3398BGF delivers 350mA per-channel output current, while the LP8860AQVFPRQ1 is rated for 150mA per-channel. Applications requiring the full 350mA per-channel output must use the MP3398BGF.
• The LP8860AQVFPRQ1 offers programmable frequency control (100kHz to 2.2MHz) versus the fixed 540kHz operation of the MP3398BGF.
• Package form factor differs significantly: 16-TSSOP versus 32-PowerLQFP, requiring PCB layout redesign for substitution.
• The LP8860AQVFPRQ1 supports PWM dimming only, while the MP3398BGF supports both analog and PWM dimming modes.

Frequently Asked Questions (FAQ)

Q: Can the LP8860AQVFPRQ1 directly replace the MP3398BGF without PCB modification?

A: No. The LP8860AQVFPRQ1 uses a 32-PowerLQFP (7x7) package while the MP3398BGF uses a 16-TSSOP package. Pin count, pinout, and footprint differ significantly, requiring PCB layout redesign.

Q: What is the primary limitation when substituting with the LP8860AQVFPRQ1?

A: The LP8860AQVFPRQ1 is rated for 150mA per-channel output current versus 350mA for the MP3398BGF. Applications requiring full 350mA per-channel output cannot use the LP8860AQVFPRQ1.

Q: Does the LP8860AQVFPRQ1 support analog dimming like the MP3398BGF?

A: No. The LP8860AQVFPRQ1 supports PWM dimming only. The MP3398BGF supports both analog and PWM dimming modes. Applications requiring analog dimming must use the MP3398BGF.

Q: What is the advantage of the LP8860AQVFPRQ1 regarding supply voltage?

A: The LP8860AQVFPRQ1 accepts input voltages from 3V to 48V, compared to 5V to 28V for the MP3398BGF. This wider range provides greater design flexibility for multi-voltage applications.

Q: Is the LP8860AQVFPRQ1 suitable for automotive applications?

A: Yes. The LP8860AQVFPRQ1 carries AEC-Q100 automotive qualification. The MP3398BGF does not specify automotive qualification.

Q: How do the operating frequencies compare?

A: The MP3398BGF operates at a fixed 540kHz switching frequency. The LP8860AQVFPRQ1 offers programmable frequency control from 100kHz to 2.2MHz, allowing optimization for specific application requirements.