LM4926TL/NOPB Equivalent & Substitute Parts

Part Overview

The LM4926TL/NOPB is a Class AB stereo headphone amplifier IC manufactured by Texas Instruments in the Boomer® series. This device delivers 80mW output power per channel at 16Ω load and operates across a 1.6V to 4.2V supply voltage range. The component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current availability and compliance standards.

Key Parameters

Parameter	LM4926TL/NOPB
Amplifier Type	Class AB
Output Configuration	2-Channel (Stereo) Headphones
Max Output Power @ 16Ω	80mW x 1
Supply Voltage Range	1.6V ~ 4.2V
Operating Temperature	-40°C ~ 85°C
Package Type	14-DSBGA (1.96x1.96)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LM4926TL/NOPB is determined by the following critical parameters:

Functional Requirements:

Amplifier topology: Class AB
Channel configuration: 2-Channel (Stereo)
Output power capability: minimum 80mW per channel at 16Ω load
Application: Headphone amplification

Electrical Compatibility:

Supply voltage range must accommodate the original specification or provide overlap
Operating temperature range: -40°C to 85°C minimum
Protection features: thermal and short-circuit protection

Physical & Compliance Requirements:

Surface mount technology
RoHS3 compliance
MSL rating of 1 (Unlimited)
REACH unaffected status

The BD88215GUL-E2 qualifies as a substitute based on matching Class AB topology, stereo output configuration, equivalent output power specification, overlapping operating temperature range, surface mount construction, and identical compliance certifications.

Parameter Comparison

Parameter	LM4926TL/NOPB	BD88215GUL-E2	Compatibility
Manufacturer	Texas Instruments	Rohm Semiconductor	Different source
Amplifier Type	Class AB	Class AB	Match
Output Configuration	2-Channel (Stereo)	2-Channel (Stereo)	Match
Max Output Power @ 16Ω	80mW x 1	80mW x 2	Equivalent or superior
Supply Voltage Range	1.6V ~ 4.2V	2.4V ~ 5.5V	Overlapping range
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Match
Mounting Type	Surface Mount	Surface Mount	Match
Package Type	14-DSBGA (1.96x1.96)	VCSP50L2	Different package
Product Status	Obsolete	Active	Active alternative available
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
MSL Rating	1 (Unlimited)	1 (Unlimited)	Match
REACH Status	REACH Unaffected	REACH Unaffected	Match

Engineering Selection Recommendations

Product Status Consideration: The LM4926TL/NOPB is classified as obsolete. The BD88215GUL-E2 is an active product from Rohm Semiconductor, ensuring long-term availability and manufacturing support for new designs and production continuity.

Compliance & Certification: Both components maintain ROHS3 compliance, REACH unaffected status, and identical MSL ratings. No compliance barriers exist for substitution.

Electrical Performance: The BD88215GUL-E2 delivers equivalent output power specifications (80mW per channel at 16Ω) with an extended supply voltage range (2.4V ~ 5.5V versus 1.6V ~ 4.2V). Designs operating within the original 1.6V ~ 4.2V window remain fully compatible. The extended upper voltage limit provides additional design flexibility.

Package Consideration: The substitute uses VCSP50L2 packaging instead of 14-DSBGA. PCB layout redesign is required. Both packages are 14-pin surface mount configurations with comparable footprint dimensions suitable for compact headphone amplifier applications.

Frequently Asked Questions (FAQ)

Q: Can the BD88215GUL-E2 directly replace the LM4926TL/NOPB without circuit modifications?

A: Functional substitution is possible due to matching Class AB topology, stereo output configuration, and equivalent power output. However, package geometry differs (VCSP50L2 versus 14-DSBGA), requiring PCB layout redesign. Pin-to-pin compatibility must be verified against detailed datasheets before implementation.

Q: What is the impact of the different supply voltage ranges?

A: The LM4926TL/NOPB operates from 1.6V to 4.2V. The BD88215GUL-E2 operates from 2.4V to 5.5V. Designs using supply voltages between 2.4V and 4.2V are fully compatible. Designs requiring operation below 2.4V cannot use the BD88215GUL-E2 without circuit modification.

Q: Are there feature differences between these components?

A: The LM4926TL/NOPB includes depop, differential inputs, shutdown, standby, and thermal protection. The BD88215GUL-E2 includes short-circuit and thermal protection. Feature set differences require evaluation against specific application requirements.

Q: Why is package change necessary?

A: The LM4926TL/NOPB is obsolete. The BD88215GUL-E2 represents the current active equivalent from Rohm Semiconductor. Package evolution reflects current manufacturing standards and availability. VCSP50L2 packaging provides equivalent performance in a modern surface mount format.

Q: Is the BD88215GUL-E2 available in sufficient quantities?

A: Current inventory shows 1065 pieces in stock as new original components, compared to 855 pieces for the obsolete LM4926TL/NOPB. Active product status ensures ongoing availability for production requirements.

Q: What compliance certifications apply to both components?

A: Both components are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (Unlimited). No additional compliance work is required for substitution in regulated applications.

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