MC34844EP LED Driver IC Equivalent & Substitute Parts

Part Overview

The MC34844EP is a 10-output LED driver IC with integrated DC-DC step-up (boost) regulator topology, designed for backlight applications. This component features analog and PWM dimming capabilities with a 50mA output current per channel and operates across a 7V to 28V supply voltage range, delivering regulated output voltages from 8V to 60V.

The MC34844EP is classified as obsolete. Identifying compatible substitute parts is essential for design continuity, procurement flexibility, and long-term product support in applications where this component is specified.

Key Parameters

Parameter	Value
Manufacturer	NXP USA Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	10
Voltage - Supply (Min)	7V
Voltage - Supply (Max)	28V
Voltage - Output	8V ~ 60V
Current - Output / Channel	50mA
Dimming	Analog, PWM
Package / Case	32-VFQFN Exposed Pad
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 105°C (TA)
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the MC34844EP is determined by strict alignment across the following critical parameters:

Manufacturer & Base Product Series: Both parts must originate from NXP USA Inc. and share the MC34844 base product number
Functional Architecture: Identical topology (step-up boost regulator), output count (10 outputs), and dimming control methods (analog and PWM)
Electrical Specifications: Supply voltage range (7V–28V), output voltage range (8V–60V), and operating temperature range (-40°C to 105°C) must remain constant
Package & Form Factor: Both parts must use the 32-VFQFN exposed pad package in surface mount configuration
Compliance & Certifications: RoHS3 compliance, MSL rating, and regulatory status (REACH, ECCN) must be maintained

The MC34844AEP qualifies as a direct substitute based on these criteria. The primary distinction is the increased output current rating (80mA per channel versus 50mA), which represents an enhancement rather than a limitation for applications designed around the original 50mA specification.

Parameter Comparison

Parameter	MC34844EP	MC34844AEP	Compatibility Notes
Manufacturer	NXP USA Inc.	NXP USA Inc.	Identical
Product Status	Obsolete	Active	Substitute is in active production
Type	DC DC Regulator	DC DC Regulator	Identical
Topology	Step-Up (Boost)	Step-Up (Boost)	Identical
Number of Outputs	10	10	Identical
Voltage - Supply (Min)	7V	7V	Identical
Voltage - Supply (Max)	28V	28V	Identical
Voltage - Output	8V ~ 60V	8V ~ 60V	Identical
Current - Output / Channel	50mA	80mA	Substitute rated higher; backward compatible
Dimming	Analog, PWM	Analog, PWM	Identical
Package / Case	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	3 (168 Hours)	3 (168 Hours)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical

Engineering Selection Recommendations

The MC34844AEP is the direct substitute for the obsolete MC34844EP. Selection is based on the following engineering factors:

Product Status & Availability: The MC34844EP is obsolete, whereas the MC34844AEP is in active production with confirmed inventory (4,300 units). This ensures long-term procurement viability and supply chain continuity.

Regulatory & Compliance Alignment: Both parts maintain identical RoHS3 compliance, MSL rating (3), REACH status, and ECCN classification (EAR99). No compliance gaps exist between the original and substitute.

Electrical & Functional Equivalence: All critical electrical parameters—supply voltage range, output voltage range, operating temperature, topology, output count, and dimming control methods—are identical. The MC34844AEP's higher current rating (80mA versus 50mA per channel) represents a performance enhancement that does not compromise backward compatibility with designs specified for 50mA operation.

Package & Form Factor: Both parts use the identical 32-VFQFN exposed pad surface mount package, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MC34844AEP be used as a direct replacement for the MC34844EP in existing designs?

A: Yes. The MC34844AEP is electrically and mechanically compatible with the MC34844EP. All functional parameters, electrical specifications, and package dimensions are identical. The higher current rating of the MC34844AEP (80mA per channel) is backward compatible with applications designed for 50mA operation.

Q: What is the primary difference between these two parts?

A: The MC34844AEP has a higher output current rating per channel (80mA) compared to the MC34844EP (50mA). All other specifications remain identical. This difference does not affect compatibility for designs operating within the original 50mA specification.

Q: Are there any compliance or certification differences between the MC34844EP and MC34844AEP?

A: No. Both parts maintain identical RoHS3 compliance, MSL rating (3), REACH status, and ECCN classification (EAR99). No regulatory or compliance gaps exist.

Q: Is the MC34844AEP available in the same package as the MC34844EP?

A: Yes. Both parts use the 32-VFQFN exposed pad surface mount package. No PCB layout modifications are required for substitution.

Q: Why is the MC34844EP classified as obsolete?

A: The MC34844EP has reached end-of-life status. The MC34844AEP serves as the active production equivalent and is the recommended substitute for new designs and ongoing procurement.

Q: What is the inventory status of the MC34844AEP?

A: The MC34844AEP is in active production with 4,300 units confirmed in stock as new original inventory.

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