TAS5111ADAD Class D Mono Amplifier IC Equivalent & Substitute Parts

Part Overview

The TAS5111ADAD is a Class D mono amplifier IC manufactured by Texas Instruments, designed for single-channel audio amplification applications. This device delivers 93W output power at 4Ω load and operates from a 3V to 3.6V supply voltage. The part is classified as Obsolete and no longer in active production, making identification of suitable substitute components essential for ongoing design support and production continuity. The TAS5111ADAD features digital inputs, mute control, short-circuit protection, thermal protection, and shutdown functionality in a 32-HTSSOP surface mount package.

Substiute Parts

TAS5111ADAD

Texas InstrumentsIn Stock: 2495TAS5111ADAD Datasheet

Current PartRFQ

TAS5825MRHBR

Texas InstrumentsIn Stock: 17036TAS5825MRHBR Datasheet

MFR RecommendedRFQ

TPA3128D2DAPR

Texas InstrumentsIn Stock: 26773TPA3128D2DAPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the TAS5111ADAD are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Amplifier Type: Class D topology
• Manufacturer: Texas Instruments (same manufacturer ecosystem)
• Package Compatibility: Surface mount packages suitable for PCB integration
• Supply Voltage: Operating range that encompasses or exceeds the original 3V ~ 3.6V specification
• Output Power Capability: Sufficient power delivery for target load impedances
• Protection Features: Presence of short-circuit and thermal protection
• Compliance Standards: ROHS3 compliance and EAR99 classification maintained

The two identified substitute parts represent different architectural approaches: one maintains the same package footprint (32-HTSSOP) with stereo capability, while the other offers enhanced supply voltage flexibility and different package geometry (32-VQFN).

Parameter Comparison

Engineering Selection Recommendations

TPA3128D2DAPR Selection Rationale:

The TPA3128D2DAPR is the preferred substitute when package footprint compatibility is a primary design constraint. This device maintains the identical 32-PowerTSSOP package geometry as the TAS5111ADAD, enabling direct PCB layout reuse without redesign. The TPA3128D2DAPR is an active product with extended operating temperature range (-40°C ~ 85°C) and identical MSL rating (3, 168 Hours), ensuring manufacturing process compatibility. The stereo configuration provides design flexibility for future multi-channel implementations. Supply voltage range (4.5V ~ 26V) exceeds the original specification, requiring voltage regulation verification in low-voltage applications below 4.5V.

TAS5825MRHBR Selection Rationale:

The TAS5825MRHBR is selected when supply voltage flexibility and moisture sensitivity optimization are design priorities. This device operates across 4.5V ~ 26.4V and features superior MSL rating (1, Unlimited), reducing moisture-related manufacturing risks. The 32-VQFN (5x5) package offers smaller footprint and improved thermal characteristics through exposed pad design. This substitute requires PCB layout redesign due to different package geometry. The extended operating temperature range (-25°C ~ 85°C) supports broader environmental applications.

Compliance Verification:

Both substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 classification, ensuring regulatory continuity with the original TAS5111ADAD specification.

Frequently Asked Questions (FAQ)

Q1: Can the TPA3128D2DAPR directly replace the TAS5111ADAD without PCB modifications?

A: The TPA3128D2DAPR shares the identical 32-PowerTSSOP package footprint with the TAS5111ADAD, enabling direct pin-compatible substitution without PCB layout changes. However, the stereo output configuration requires circuit design review to confirm single-channel operation compatibility with existing audio signal routing.

Q2: What is the primary limitation when substituting with parts that have higher minimum supply voltage (4.5V)?

A: The TAS5111ADAD operates from 3V ~ 3.6V, while both substitute parts require minimum 4.5V supply. Applications using supply voltages below 4.5V cannot use these substitutes without additional voltage regulation circuitry. Designs operating at 4.5V or higher are fully compatible.

Q3: How does the stereo output configuration of substitute parts affect mono amplifier designs?

A: Both substitute parts feature 2-channel (stereo) output architecture. In mono applications, one channel can be utilized while the second channel remains unused or configured for parallel operation to increase output power. Circuit design must account for this architectural difference.

Q4: What is the significance of MSL rating differences between the main part and substitutes?

A: The TAS5111ADAD and TPA3128D2DAPR both carry MSL 3 (168 Hours), indicating identical moisture sensitivity and manufacturing handling requirements. The TAS5825MRHBR features MSL 1 (Unlimited), providing superior moisture tolerance and reducing bake-out requirements during production assembly.

Q5: Are there thermal performance differences between the 32-PowerTSSOP and 32-VQFN packages?

A: The 32-VQFN package includes an exposed pad for enhanced thermal dissipation, providing superior heat transfer compared to the 32-PowerTSSOP package. Applications requiring high thermal performance may benefit from the TAS5825MRHBR, though both packages are suitable for Class D amplifier thermal management.

Q6: Can designs be migrated from TAS5111ADAD to TAS5825MRHBR without supply voltage modifications?

A: The TAS5825MRHBR minimum supply voltage is 4.5V, compared to 3V for the TAS5111ADAD. Designs operating below 4.5V require voltage regulation modifications. Designs already operating at 4.5V or higher require only package layout redesign and signal routing verification.