TDA8950TH/N1,118

Overview

The TDA8950TH/N1,118 is a high-efficiency Class D audio power amplifier manufactured by NXP Semiconductors. It operates within a symmetrical supply voltage range of ±12.5 V to ±40 V and features low quiescent current consumption. The device supports stereo Single-Ended (SE) or mono Bridge-Tied Load (BTL) configurations, delivering up to 170 W per channel at 4 Ω in SE mode and 300 W in BTL mode at 8 Ω. It includes advanced protection strategies such as thermal foldback, overcurrent protection, and short-circuit proofing across the load.

Feature Summary

• Pin compatible with TDA8920B for both HSOP24 and DBS23P packages
• Stereo full differential inputs configurable as stereo Single-Ended or mono Bridge-Tied Load
• Smooth pop noise-free start-up and switch off with zero dead time switching
• Advanced protection strategy including Thermal FoldBack, overvoltage, and fully short-circuit proof outputs

Applications

• DVD systems
• Mini and micro receivers
• Home Theater In A Box (HTIAB) systems
• High-power speaker systems

Procurement Notes

Verify component authenticity through official NXP channels or authorized distributors. Confirm package type matches the HSOP24 specification for the TH suffix. Check for RoHS compliance status and ensure storage conditions adhere to moisture sensitivity level requirements to prevent damage prior to soldering.

Selection Notes

Select this amplifier for applications requiring high output power efficiency and robust protection features. Ensure the design accommodates the required supply voltage range and thermal management for the HSOP24 package. Verify that the external LC filter components match the specified impedance and frequency characteristics for optimal performance.

Part Context

This component belongs to the TDA8950 series of Class D audio amplifiers. It is functionally pin-compatible with the TDA8920B, facilitating direct upgrades or replacements in existing designs. The TH suffix denotes the HSOP24 plastic heatsink small outline package variant.

Replacement Considerations

TDA8950J/N1,112

FAQ

How is the PWM carrier frequency determined?

The carrier frequency is set by an external resistor connected between the OSC and VSSA pins. A typical setting of 30 kΩ results in a frequency of approximately 345 kHz.

What happens if the junction temperature exceeds the thermal foldback threshold?

If the junction temperature exceeds the activation threshold, the closed-loop voltage gain is gradually reduced by 6 dB to lower power dissipation and stabilize the temperature.