MP3394SGF LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The MP3394SGF is an active LED driver controller IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring PWM dimming control. This Surface Mount device operates as a Step-Up (Boost) DC-DC controller with four independent outputs, each capable of delivering 180mA at frequencies up to 670kHz. The part is currently in active production status with 10,969 units in stock.

Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of this product category, particularly for applications where supply voltage compatibility, output current capacity, and dimming control methodology align with system requirements.

Key Parameters

Parameter	MP3394SGF
Manufacturer	Monolithic Power Systems Inc.
Type	DC DC Controller
Topology	Step-Up (Boost)
Number of Outputs	4
Voltage - Supply (Min)	5V
Voltage - Supply (Max)	28V
Current - Output / Channel	180mA
Frequency	670kHz
Dimming	PWM
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MP3394SGF is determined by the following critical parameters:

Topology Match: Step-Up (Boost) DC-DC controller architecture
Output Configuration: Four independent output channels
Dimming Control: PWM-based dimming methodology
Supply Voltage Range: Minimum 5V input capability with maximum rating of at least 28V
Output Current: Minimum 180mA per channel capacity
Operating Temperature Range: Support for -40°C to 125°C operation
RoHS Compliance: ROHS3 Compliant status
Mounting: Surface Mount technology

The LP8860CQVFPRQ1 qualifies as a substitute based on these parameters, though package form factor differs due to functional density requirements.

Parameter Comparison

Parameter	MP3394SGF	LP8860CQVFPRQ1	Compatibility Notes
Manufacturer	Monolithic Power Systems Inc.	Texas Instruments	Different manufacturers
Type	DC DC Controller	DC DC Controller	Functionally equivalent
Topology	Step-Up (Boost)	Step-Up (Boost)	Functionally equivalent
Number of Outputs	4	4	Functionally equivalent
Voltage - Supply (Min)	5V	3V	LP8860 supports lower minimum voltage
Voltage - Supply (Max)	28V	48V	LP8860 supports higher maximum voltage
Current - Output / Channel	180mA	150mA	MP3394SGF provides higher per-channel current
Frequency	670kHz	100kHz ~ 2.2MHz	LP8860 offers wider frequency range
Dimming	PWM	PWM	Functionally equivalent
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TA)	Functionally equivalent
Package / Case	16-TSSOP (0.173", 4.40mm Width) Exposed Pad	32-PowerLQFP (7x7)	Different package form factors
Mounting Type	Surface Mount	Surface Mount	Functionally equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Functionally equivalent
Product Status	Active	Active	Both in active production
Grade	Standard	Automotive	LP8860 includes automotive qualification
Qualification	Not specified	AEC-Q100	LP8860 carries automotive qualification

Engineering Selection Recommendations

Both the MP3394SGF and LP8860CQVFPRQ1 maintain active product status with ROHS3 compliance and equivalent operating temperature ranges. Selection between these parts depends on specific application constraints:

The MP3394SGF is appropriate for designs where the 16-TSSOP package footprint is required and per-channel current delivery of 180mA is necessary within a 5V to 28V supply range.

The LP8860CQVFPRQ1 is appropriate for designs where the 32-PowerLQFP package is acceptable, automotive-grade qualification (AEC-Q100) is required, or extended supply voltage range (3V to 48V) is beneficial. The LP8860CQVFPRQ1 delivers 150mA per channel, which may be limiting in applications requiring the full 180mA capacity of the MP3394SGF.

Both parts support PWM dimming control and four independent output channels, maintaining functional equivalence in backlight driver applications.

Frequently Asked Questions (FAQ)

Q: Can the LP8860CQVFPRQ1 directly replace the MP3394SGF on an existing PCB?

A: No. The LP8860CQVFPRQ1 uses a 32-PowerLQFP (7x7) package while the MP3394SGF uses a 16-TSSOP package. PCB layout redesign is required. Pin-to-pin functional mapping must be verified against respective datasheets.

Q: What is the primary difference in output current capability?

A: The MP3394SGF delivers 180mA per channel, while the LP8860CQVFPRQ1 delivers 150mA per channel. Applications requiring the full 180mA specification cannot use the LP8860CQVFPRQ1 as a direct substitute.

Q: Does the LP8860CQVFPRQ1 support the same supply voltage range?

A: No. The MP3394SGF operates from 5V to 28V, while the LP8860CQVFPRQ1 operates from 3V to 48V. The LP8860CQVFPRQ1 supports a wider range, but designs optimized for the 5V to 28V window must verify compatibility with the extended range.

Q: Are both parts suitable for automotive applications?

A: The LP8860CQVFPRQ1 carries AEC-Q100 automotive qualification. The MP3394SGF does not specify automotive qualification. For automotive-grade requirements, the LP8860CQVFPRQ1 is the appropriate choice.

Q: What is the frequency difference between these parts?

A: The MP3394SGF operates at a fixed 670kHz frequency. The LP8860CQVFPRQ1 supports a programmable frequency range of 100kHz to 2.2MHz, offering greater design flexibility for EMI and efficiency optimization.

Q: Are both parts RoHS compliant?

A: Yes. Both the MP3394SGF and LP8860CQVFPRQ1 are ROHS3 compliant and REACH unaffected.

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