LM4869MH/NOPB Equivalent & Substitute Parts

Part Overview

The LM4869MH/NOPB is a Class AB stereo amplifier IC manufactured by Texas Instruments, designed for 2-channel audio applications. This device delivers 2.6W per channel at 4Ω load impedance and operates across a wide supply voltage range of 2V to 5.5V. The part is classified as obsolete, necessitating identification of active substitute components that maintain functional and electrical compatibility for new designs and production continuity.

Substiute Parts

LM4869MH/NOPB

Texas InstrumentsIn Stock: 1025LM4869MH/NOPB Datasheet

Current PartRFQ

TPA6017A2PWPR

Texas InstrumentsIn Stock: 4344TPA6017A2PWPR Datasheet

MFR RecommendedRFQ

BD7836EFV-E2

Rohm SemiconductorIn Stock: 877BD7836EFV-E2 Datasheet

MFR RecommendedRFQ

TPA6017A2PWP

Texas InstrumentsIn Stock: 2074TPA6017A2PWP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM4869MH/NOPB are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Amplifier topology: Class AB stereo configuration
• Package form factor: 20-HTSSOP or equivalent 20-pin surface mount package
• Operating temperature range: -40°C to 85°C
• Output channel configuration: 2-Channel (Stereo)
• Supply voltage compatibility: Minimum overlap with 2V ~ 5.5V range
• Mounting type: Surface Mount

Substitution Logic: The identified substitute parts maintain the same amplifier class, stereo output configuration, and package footprint. All substitutes operate within the specified temperature range and are RoHS3 compliant. Differences in maximum output power at specific load impedances and supply voltage minimums are noted but do not preclude substitution when load conditions and supply specifications are verified for the target application.

Parameter Comparison

Engineering Selection Recommendations

TPA6017A2PWPR and TPA6017A2PWP: Both TPA6017A2 variants are active products from Texas Instruments with identical electrical specifications. These parts operate at a minimum supply voltage of 4.5V, which is higher than the LM4869MH/NOPB minimum of 2V. Selection of either variant depends on packaging requirements: TPA6017A2PWPR is supplied in Cut Tape and Digi-Reel format, while TPA6017A2PWP is supplied in Tube packaging. Both maintain RoHS3 compliance and the same operating temperature range. Output power is rated at 2W per channel at 3Ω load, compared to 2.6W at 4Ω for the original part.

BD7836EFV-E2: The BD7836EFV-E2 from Rohm Semiconductor is an active product with the same Class AB stereo configuration and operating temperature range. This part operates at a minimum supply voltage of 4.5V and delivers 1.9W per channel at 4Ω load. The package designation is 20-VSSOP with exposed pad, which differs slightly from the PowerTSSOP variant. MSL rating is 3 (168 Hours), indicating stricter moisture handling requirements compared to the original part.

All substitute parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for new production.

Frequently Asked Questions (FAQ)

Q: Can the TPA6017A2PWPR directly replace the LM4869MH/NOPB in existing designs?

A: Direct replacement requires verification of supply voltage availability. The TPA6017A2PWPR requires a minimum supply voltage of 4.5V, whereas the LM4869MH/NOPB operates from 2V. If the application supplies 4.5V or higher, the TPA6017A2PWPR is electrically compatible. PCB layout and thermal management should be evaluated, as the package footprint is identical but thermal characteristics may differ.

Q: What is the difference between TPA6017A2PWPR and TPA6017A2PWP?

A: Both parts are electrically identical with the same specifications. The difference is in packaging format: TPA6017A2PWPR is supplied in Cut Tape and Digi-Reel format for automated assembly, while TPA6017A2PWP is supplied in Tube format for manual handling or lower-volume applications.

Q: Why does the BD7836EFV-E2 have a higher MSL rating?

A: The BD7836EFV-E2 has an MSL rating of 3 (168 Hours), compared to MSL 2 for the TPA6017A2 variants. This indicates stricter moisture sensitivity and requires more careful handling during storage and assembly. MSL 3 components must be baked before reflow soldering if exposed to ambient humidity for extended periods.

Q: Is the package footprint identical across all substitutes?

A: The TPA6017A2 variants use 20-PowerTSSOP packaging, which is footprint-compatible with the LM4869MH/NOPB. The BD7836EFV-E2 uses 20-VSSOP with exposed pad, which has the same pin count and similar dimensions but includes an exposed thermal pad. PCB layout verification is required before substitution.

Q: What is the impact of lower output power in the substitute parts?

A: The TPA6017A2 variants deliver 2W at 3Ω load, while the BD7836EFV-E2 delivers 1.9W at 4Ω load. Both are lower than the original 2.6W at 4Ω. Output power capability must be evaluated against the specific load impedance and power requirements of the target application. If the application requires the full 2.6W output, these substitutes may not be suitable.

Q: Are all substitute parts currently in production?

A: Yes. The TPA6017A2PWPR, TPA6017A2PWP, and BD7836EFV-E2 are all classified as active products. The original LM4869MH/NOPB is obsolete, making these active alternatives necessary for new designs and ongoing production support.