RT9104GS Equivalent & Substitute Parts

Part Overview

The RT9104GS is a Class D stereo amplifier IC manufactured by Richtek USA Inc., designed to deliver 3W per channel at 3Ohm load impedance in a compact 16-SOP package. This device integrates comprehensive protection features including depop, short-circuit protection, thermal protection, and shutdown functionality, along with volume control capability. The RT9104GS is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. The substitute part identified maintains functional and electrical compatibility while offering improved availability and updated packaging options.

Substiute Parts

RT9104GS

Richtek USA Inc.In Stock: 5388RT9104GS Datasheet

Current PartRFQ

TPA2008D2PWPR

Texas InstrumentsIn Stock: 26694TPA2008D2PWPR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT9104GS with the TPA2008D2PWPR is based on strict equivalence of the following critical electrical and functional parameters:

Electrical Equivalence Criteria:

• Identical Class D amplifier topology
• Matching 2-channel stereo output configuration
• Equivalent output power specification: 3W per channel at 3Ohm load
• Identical supply voltage operating range: 4.5V ~ 5.5V
• Matching operating temperature range: -40°C ~ 85°C

Functional Equivalence Criteria:

• Depop functionality present in both devices
• Short-circuit protection implemented in both designs
• Thermal protection integrated in both devices
• Shutdown control available in both parts
• Volume control capability in both devices

Compliance Equivalence:

• Both devices maintain ROHS3 compliance
• Both devices are REACH unaffected
• Both devices share identical ECCN and HTSUS classifications

The primary distinction between these parts is packaging format and product lifecycle status. The TPA2008D2PWPR is an active product with enhanced availability, while the RT9104GS is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The TPA2008D2PWPR serves as the direct functional equivalent for the obsolete RT9104GS based on electrical and performance parameter equivalence. Selection of the TPA2008D2PWPR is supported by the following engineering factors:

Product Lifecycle Status: The TPA2008D2PWPR maintains active product status with established supply chain availability, whereas the RT9104GS is classified as obsolete. This distinction is critical for long-term design sustainability and production continuity.

Compliance Certification: Both devices maintain identical regulatory compliance certifications (ROHS3, REACH unaffected, EAR99 ECCN classification), ensuring equivalent regulatory acceptance across manufacturing jurisdictions.

Moisture Sensitivity: The TPA2008D2PWPR demonstrates improved moisture sensitivity characteristics (MSL 2, 1 Year) compared to the RT9104GS (MSL 3, 168 Hours), providing enhanced handling flexibility during manufacturing and storage operations.

Electrical Performance: Complete electrical equivalence across all specified parameters—output power, supply voltage range, operating temperature range, and protection features—ensures functional interchangeability within equivalent circuit topologies.

Packaging Consideration: The TPA2008D2PWPR utilizes a 24-pin PowerTSSOP package compared to the 16-pin SOIC package of the RT9104GS. PCB layout redesign is required to accommodate the different pin configuration and package footprint. The additional pins in the TPA2008D2PWPR package provide enhanced thermal management and differential input capability.

Frequently Asked Questions (FAQ)

Q: Can the TPA2008D2PWPR be used as a direct pin-for-pin replacement for the RT9104GS?

A: No. The TPA2008D2PWPR uses a 24-pin PowerTSSOP package while the RT9104GS uses a 16-pin SOIC package. Pin configurations differ, requiring PCB layout and schematic redesign. However, the devices are functionally equivalent and can be integrated into new designs with appropriate circuit modifications.

Q: Are the electrical specifications identical between these two amplifier ICs?

A: Yes. Both devices deliver 3W per channel at 3Ohm load impedance, operate across the 4.5V to 5.5V supply voltage range, and function across the -40°C to 85°C temperature range. Both integrate identical protection features: depop, short-circuit protection, thermal protection, and shutdown control, along with volume control capability.

Q: What is the significance of the different package types?

A: The RT9104GS uses a 16-SOIC package (0.154" width, 3.90mm), while the TPA2008D2PWPR uses a 24-pin PowerTSSOP package (0.173" width, 4.40mm). The PowerTSSOP package provides improved thermal dissipation characteristics and includes differential input capability. Package selection impacts PCB footprint, thermal management strategy, and board layout complexity.

Q: Why is the RT9104GS classified as obsolete?

A: The RT9104GS is designated as obsolete by the manufacturer, indicating discontinued production and limited remaining inventory. The TPA2008D2PWPR represents the active equivalent solution with ongoing manufacturing support and established supply chain availability.

Q: Does the TPA2008D2PWPR include additional features not present in the RT9104GS?

A: The TPA2008D2PWPR includes differential input capability in addition to the core protection and control features present in both devices. Both devices maintain depop, short-circuit protection, thermal protection, shutdown control, and volume control functionality.

Q: What are the moisture sensitivity implications for component handling?

A: The TPA2008D2PWPR carries an MSL rating of 2 (1 Year), indicating superior moisture resistance compared to the RT9104GS (MSL 3, 168 Hours). This provides extended shelf life and reduced risk of moisture-related failures during manufacturing processes.

Q: Are both devices RoHS compliant?

A: Yes. Both the RT9104GS and TPA2008D2PWPR maintain ROHS3 compliance and are REACH unaffected, ensuring equivalent regulatory acceptance for manufacturing and distribution across regulated markets.