MP4068GN LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP4068GN is an AC DC offline switcher LED driver IC manufactured by Monolithic Power Systems Inc., designed for lighting applications. This single-output device operates with a 4.1V to 5V supply range and delivers 160mA output current through a Triac dimming interface. The part is currently active in production with ROHS3 compliance and MSL 2A rating.

Substitute parts are necessary when the MP4068GN reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative electrical characteristics such as higher supply voltage ranges, increased output current capacity, or different dimming control methods.

Key Parameters

Parameter	MP4068GN
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	AC DC Offline Switcher
Topology	Step-Down (Buck), Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	4.1V
Voltage - Supply (Max)	5V
Voltage - Output	50V
Current - Output / Channel	160mA
Frequency	22kHz
Dimming	Triac
Internal Switch(s)	No
Package / Case	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	2A (4 Weeks)

Substitute Part Grouping Explanation

Substitution eligibility for the MP4068GN is determined by the following critical parameters:

Primary Substitution Criteria:

Device Type: AC DC Offline Switcher
Number of Outputs: 1
Dimming Control Method: Triac (primary requirement for direct substitution)
Topology: Step-Down (Buck), Step-Up (Boost) preferred for functional equivalence
Package Compatibility: Surface mount packages acceptable
Product Status: Active
Compliance: ROHS3 Compliant

Secondary Compatibility Factors:

Supply voltage range must accommodate the application's input requirements
Output current capacity must meet or exceed 160mA for direct replacement
Operating temperature range must support the intended environment
Moisture sensitivity level and storage conditions must be compatible with assembly processes

The substitute parts listed below meet the core substitution criteria of AC DC offline switcher topology with Triac dimming capability and active product status. Variations in supply voltage ranges, output current ratings, and package types reflect design flexibility within the LED driver IC category.

Parameter Comparison

Parameter	MP4068GN	AL9901FDF-13	AL9910A-5S-13	CPC9909N	LM3497MM/NOPB	TPS92075DDC/NOPB	TPS92410DR
Manufacturer	Monolithic Power Systems Inc.	Diodes Incorporated	Diodes Incorporated	IXYS Integrated Circuits Division	Texas Instruments	Texas Instruments	Texas Instruments
Type	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher
Topology	Step-Down (Buck), Step-Up (Boost)	Step-Down (Buck)	Step-Down (Buck), Step-Up (Boost)	Step-Down (Buck), Step-Up (Boost)	Step-Down (Buck)	Step-Down (Buck), Step-Up (Boost)	-
Number of Outputs	1	1	1	1	1	1	1
Voltage - Supply (Min)	4.1V	15V	20V	8V	8V	11V	9.5V
Voltage - Supply (Max)	5V	500V	500V	550V	12V	18V	450V
Frequency	22kHz	300kHz	300kHz	30kHz ~ 120kHz	-	-	-
Dimming	Triac	Analog, PWM	Analog, PWM	PWM	Triac	Triac	Analog, TRIAC
Internal Switch(s)	No	Yes	No	No	No	No	No
Package / Case	8-SOIC (0.154", 3.90mm Width) Exposed Pad	12-UDFN Exposed Pad	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	SOT-23-6 Thin, TSOT-23-6	14-SOIC (0.154", 3.90mm Width), 13 Leads
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2A (4 Weeks)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, meeting baseline regulatory and supply chain requirements.

Triac Dimming Direct Substitutes: LM3497MM/NOPB and TPS92075DDC/NOPB provide Triac dimming functionality matching the MP4068GN's control interface. LM3497MM/NOPB operates within a narrower 8V to 12V supply range suitable for low-voltage applications. TPS92075DDC/NOPB extends the supply range to 11V to 18V and uses a compact SOT-23-6 package. TPS92410DR supports both Analog and Triac dimming with a wide 9.5V to 450V supply range but requires PCB layout accommodation for a 13-lead SOIC package.

Topology-Matched Alternatives: AL9910A-5S-13 and CPC9909N replicate the Step-Down/Step-Up topology of the MP4068GN but employ PWM or Analog/PWM dimming methods instead of Triac control. These parts are suitable for applications where dimming control architecture can be redesigned. AL9910A-5S-13 maintains the 8-SOIC package footprint. CPC9909N also uses 8-SOIC packaging with a wider 8V to 550V supply range.

Higher Current Capacity Option: AL9901FDF-13 delivers 400mA output current through an internal switch, exceeding the MP4068GN's 160mA rating. This part uses a 12-UDFN package requiring different PCB layout and employs Analog/PWM dimming rather than Triac control.

All substitute parts carry MSL ratings of 1 (Unlimited) or 2 (1 Year), providing improved moisture handling compared to the MP4068GN's MSL 2A (4 Weeks) specification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MP4068GN with any of these substitute parts?

A: Direct replacement depends on your dimming control architecture. LM3497MM/NOPB, TPS92075DDC/NOPB, and TPS92410DR maintain Triac dimming compatibility. AL9910A-5S-13, CPC9909N, and AL9901FDF-13 require redesign of the dimming control circuit due to PWM or Analog control methods.

Q: What is the primary difference between Triac and PWM dimming?

A: Triac dimming uses phase-cut control of AC line voltage, while PWM dimming modulates the DC output signal. These methods require different control circuitry and cannot be interchanged without circuit redesign.

Q: Which substitute offers the closest electrical match to MP4068GN?

A: AL9910A-5S-13 provides the closest match in topology (Step-Down/Step-Up), package (8-SOIC), and surface mount configuration. However, it uses PWM dimming instead of Triac control.

Q: Are there package compatibility concerns?

A: Yes. MP4068GN uses 8-SOIC with exposed pad. AL9910A-5S-13 and CPC9909N use standard 8-SOIC without exposed pad specification. LM3497MM/NOPB uses 10-TFSOP/MSOP (different footprint). TPS92075DDC/NOPB uses SOT-23-6 (significantly smaller). AL9901FDF-13 uses 12-UDFN (different footprint). TPS92410DR uses 13-lead SOIC (larger package). PCB layout modifications are required for all substitutes.

Q: What supply voltage range should I consider for substitution?

A: The MP4068GN operates at 4.1V to 5V. Most substitutes require higher minimum voltages (8V to 20V). Only LM3497MM/NOPB (8V to 12V) and TPS92075DDC/NOPB (11V to 18V) approach this low-voltage range. For applications requiring 4.1V to 5V operation, no direct substitute exists in this list.

Q: How do MSL ratings affect component handling?

A: MP4068GN has MSL 2A (4 Weeks), requiring reflow within 4 weeks of moisture exposure. Most substitutes have MSL 1 (Unlimited), eliminating time-sensitive storage constraints. TPS92410DR has MSL 2 (1 Year), providing extended handling time compared to MP4068GN.

Q: Which substitute has the widest supply voltage range?

A: CPC9909N supports 8V to 550V, followed by AL9910A-5S-13 and AL9901FDF-13 at 20V to 500V and 15V to 500V respectively. These wide-range parts are suitable for universal input applications.

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